DATAMONGO-981 - Release version 1.6.0.M1.

Added currentDate and currentTimestamp to Update.

Original pull request: #200.

CONTRIBUTING.MD

@@ -0,0 +1 @@
+You find the contribution guidelines for Spring Data projects [here](https://github.com/spring-projects/spring-data-build/blob/master/CONTRIBUTING.md).

README.md

@@ -1,155 +1,147 @@
-Spring Data - Document
-======================
+# Spring Data MongoDB
 
-The primary goal of the [Spring Data](http://www.springsource.org/spring-data) project is to make it easier to build Spring-powered applications that use new data access technologies such as non-relational databases, map-reduce frameworks, and cloud based data services.
-As the name implies, the **Document** modules provides integration with document databases such as [MongoDB](http://www.mongodb.org/) and [CouchDB](http://couchdb.apache.org/).
+The primary goal of the [Spring Data](http://projects.spring.io/spring-data) project is to make it easier to build Spring-powered applications that use new data access technologies such as non-relational databases, map-reduce frameworks, and cloud based data services.
 
-Getting Help
-------------
+The Spring Data MongoDB project aims to provide a familiar and consistent Spring-based programming model for new datastores while retaining store-specific features and capabilities. The Spring Data MongoDB project provides integration with the MongoDB document database. Key functional areas of Spring Data MongoDB are a POJO centric model for interacting with a MongoDB DBCollection and easily writing a repository style data access layer.
 
-At this point your best bet is to look at the Look at the [JavaDocs](http://static.springsource.org/spring-data/data-document/docs/1.0.0.BUILD-SNAPSHOT/spring-data-mongodb/apidocs/) for MongoDB integration and corresponding and source code. For more detailed questions, use the [forum](http://forum.springsource.org/forumdisplay.php?f=80). If you are new to Spring as well as to Spring Data, look for information about [Spring projects](http://www.springsource.org/projects). 
+## Getting Help
 
-The [User Guide](http://static.springsource.org/spring-data/data-document/docs/1.0.0.BUILD-SNAPSHOT/reference/html/) (A work in progress). 
+For a comprehensive treatment of all the Spring Data MongoDB features, please refer to:
+
+* the [User Guide](http://docs.spring.io/spring-data/mongodb/docs/current/reference/html/)
+* the [JavaDocs](http://docs.spring.io/spring-data/mongodb/docs/current/api/) have extensive comments in them as well.
+* the home page of [Spring Data MongoDB](http://projects.spring.io/spring-data-mongodb) contains links to articles and other resources.
+* for more detailed questions, use [Spring Data Mongodb on Stackoverflow](http://stackoverflow.com/questions/tagged/spring-data-mongodb).
+
+If you are new to Spring as well as to Spring Data, look for information about [Spring projects](http://projects.spring.io/).
 
 
+## Quick Start
 
-Quick Start
------------
+### Maven configuration
 
-## MongoDB
+Add the Maven dependency:
 
-For those in a hurry:
+```xml
+<dependency>
+  <groupId>org.springframework.data</groupId>
+  <artifactId>spring-data-mongodb</artifactId>
+  <version>1.5.0.RELEASE</version>
+</dependency>
+```
 
+If you'd rather like the latest snapshots of the upcoming major version, use our Maven snapshot repository and declare the appropriate dependency version.
 
-* Download the jar through Maven:
+```xml
+<dependency>
+  <groupId>org.springframework.data</groupId>
+  <artifactId>spring-data-mongodb</artifactId>
+  <version>1.6.0.BUILD-SNAPSHOT</version>
+</dependency>
 
-      <dependency>
-        <groupId>org.springframework.data</groupId>
-        <artifactId>spring-data-mongodb</artifactId>
-        <version>1.0.0.BUILD-SNAPSHOT</version>
-      </dependency> 
-
-
-      <repository>
-        <id>spring-maven-snapshot</id>
-        <snapshots><enabled>true</enabled></snapshots>
-        <name>Springframework Maven SNAPSHOT Repository</name>
-        <url>http://maven.springframework.org/snapshot</url>
-      </repository> 
+<repository>
+  <id>spring-libs-snapshot</id>
+  <name>Spring Snapshot Repository</name>
+  <url>http://repo.spring.io/libs-snapshot</url>
+</repository>
+```
 
 ### MongoTemplate
-MongoTemplate is the central support class for Mongo database operations.  It provides
+
+MongoTemplate is the central support class for Mongo database operations. It provides:
 
 * Basic POJO mapping support to and from BSON
-* Connection Affinity callback
-* Exception translation into Spring's [technology agnostic DAO exception hierarchy](http://static.springsource.org/spring/docs/3.0.x/spring-framework-reference/html/dao.html#dao-exceptions).
+* Convenience methods to interact with the store (insert object, update objects) and MongoDB specific ones (geo-spatial operations, upserts, map-reduce etc.)
+* Connection affinity callback
+* Exception translation into Spring's [technology agnostic DAO exception hierarchy](http://docs.spring.io/spring/docs/current/spring-framework-reference/html/dao.html#dao-exceptions).
 
-Future plans are to support optional logging and/or exception throwing based on WriteResult return value, common map-reduce operations, GridFS operations.  A simple API for partial document updates is also planned.
+### Spring Data repositories
 
-### Easy Data Repository generation
+To simplify the creation of data repositories Spring Data MongoDB provides a generic repository programming model. It will automatically create a repository proxy for you that adds implementations of finder methods you specify on an interface.  
 
-To simplify the creation of Data Repositories a generic Repository interface and default implementation is provided.  Furthermore, Spring will automatically create a Repository implementation for you that adds implementations of finder methods you specify on an interface.  
+For example, given a `Person` class with first and last name properties, a `PersonRepository` interface that can query for `Person` by last name and when the first name matches a like expression is shown below:
 
-The Repository interface is
+```java
+public interface PersonRepository extends CrudRepository<Person, Long> {
 
-        public interface Repository<T, ID extends Serializable> { 
+  List<Person> findByLastname(String lastname);
 
-          T save(T entity);
+  List<Person> findByFirstnameLike(String firstname);
+}
+```
 
-          List<T> save(Iterable<? extends T> entities);
+The queries issued on execution will be derived from the method name. Extending `CrudRepository` causes CRUD methods being pulled into the interface so that you can easily save and find single entities and collections of them.
 
-          T findById(ID id);
+You can have Spring automatically create a proxy for the interface by using the following JavaConfig:
 
-          boolean exists(ID id);
+```java
+@Configuration
+@EnableMongoRepositories
+class ApplicationConfig extends AbstractMongoConfiguration {
 
-          List<T> findAll();
+  @Override
+  public Mongo mongo() throws Exception {
+    return new MongoClient();
+  }
 
-          Long count();
+  @Override
+  protected String getDatabaseName() {
+    return "springdata";
+  }
+}
+```
 
-          void delete(T entity);
+This sets up a connection to a local MongoDB instance and enables the detection of Spring Data repositories (through `@EnableMongoRepositories`). The same configuration would look like this in XML:
 
-          void delete(Iterable<? extends T> entities);
+```xml
+<bean id="template" class="org.springframework.data.mongodb.core.MongoTemplate">
+  <constructor-arg>
+    <bean class="com.mongodb.MongoClient">
+       <constructor-arg value="localhost" />
+       <constructor-arg value="27017" />
+    </bean>
+  </constructor-arg>
+  <constructor-arg value="database" />
+</bean>
 
-          void deleteAll();
-        }
+<mongo:repositories base-package="com.acme.repository" />
+```
 
+This will find the repository interface and register a proxy object in the container. You can use it as shown below:
 
-The MongoRepository extends Repository and will in future add more Mongo specific methods.
+```java
+@Service
+public class MyService {
 
-    public interface MongoRepository<T, ID extends Serializable> extends
-        Repository<T, ID> {
-    }
+  private final PersonRepository repository;
 
-SimpleMongoRepository is the out of the box implementation of the MongoRepository you can use for basid CRUD operations.  
+  @Autowired
+  public MyService(PersonRepository repository) {
+    this.repository = repository;
+  }
 
-To go beyond basic CRUD, extend the MongoRepository interface and supply your own finder methods that follow simple naming conventions such that they can be easily converted into queries.  
+  public void doWork() {
 
-For example, given a Person class with first and last name properties, a PersonRepository interface that can query for Person by last name and when the first name matches a regular expression is shown below
+     repository.deleteAll();
 
-    public interface PersonRepository extends MongoRepository<Person, Long> {
+     Person person = new Person();
+     person.setFirstname("Oliver");
+     person.setLastname("Gierke");
+     person = repository.save(person);
 
-      List<Person> findByLastname(String lastname);
+     List<Person> lastNameResults = repository.findByLastname("Gierke");
+     List<Person> firstNameResults = repository.findByFirstnameLike("Oli*");
+ }
+}
+```
 
-      List<Person> findByFirstnameLike(String firstname);
-    }
-
-You can have Spring automatically generate the implemention as shown below
-
-        <bean id="template" class="org.springframework.data.document.mongodb.MongoTemplate">
-                <constructor-arg>
-                        <bean class="com.mongodb.Mongo">
-                                <constructor-arg value="localhost" />
-                                <constructor-arg value="27017" />
-                        </bean>
-                </constructor-arg>
-                <constructor-arg value="database" />
-                <property name="defaultCollectionName" value="springdata" />
-        </bean>
-
-        <bean class="org.springframework.data.document.mongodb.repository.MongoRepositoryFactoryBean">
-                <property name="template" ref="template" />
-                <property name="repositoryInterface" value="org.springframework.data.document.mongodb.repository.PersonRepository" />
-        </bean>
-
-This will register an object in the container named PersonRepository.  You can use it as shown below
-
-     @Service
-     public class MyService {
-
-        @Autowired
-        PersonRepository repository;
-
-
-        public void doWork() {
-
-           repository.deleteAll();
-
-           Person person = new Person();
-           person.setFirstname("Oliver");
-           person.setLastname("Gierke");
-           person = repository.save(person);
-
-           List<Person> lastNameResults = repository.findByLastname("Gierke");
-
-           List<Person> firstNameResults = repository.findByFirstnameLike("Oli*");
-
-       }
-    }
-
-
-## CouchDB
-
-TBD
-
-
-Contributing to Spring Data
----------------------------
+## Contributing to Spring Data
 
 Here are some ways for you to get involved in the community:
 
-* Get involved with the Spring community on the Spring Community Forums.  Please help out on the [forum](http://forum.springsource.org/forumdisplay.php?f=80) by responding to questions and joining the debate.
+* Get involved with the Spring community on Stackoverflow and help out on the [spring-data-mongodb](http://stackoverflow.com/questions/tagged/spring-data-mongodb) tag by responding to questions and joining the debate.
 * Create [JIRA](https://jira.springframework.org/browse/DATADOC) tickets for bugs and new features and comment and vote on the ones that you are interested in.  
 * Github is for social coding: if you want to write code, we encourage contributions through pull requests from [forks of this repository](http://help.github.com/forking/). If you want to contribute code this way, please reference a JIRA ticket as well covering the specific issue you are addressing.
-* Watch for upcoming articles on Spring by [subscribing](http://www.springsource.org/node/feed) to springframework.org
+* Watch for upcoming articles on Spring by [subscribing](http://spring.io/blog) to spring.io.
 
 Before we accept a non-trivial patch or pull request we will need you to sign the [contributor's agreement](https://support.springsource.com/spring_committer_signup).  Signing the contributor's agreement does not grant anyone commit rights to the main repository, but it does mean that we can accept your contributions, and you will get an author credit if we do.  Active contributors might be asked to join the core team, and given the ability to merge pull requests.

etc/formatting.xml

@@ -0,0 +1,291 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<profiles version="12">
+<profile kind="CodeFormatterProfile" name="Spring Data" version="12">
+<setting id="org.eclipse.jdt.core.formatter.comment.insert_new_line_before_root_tags" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.disabling_tag" value="@formatter:off"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_annotation" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_type_parameters" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_type_declaration" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_type_arguments" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.brace_position_for_anonymous_type_declaration" value="end_of_line"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_colon_in_case" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_brace_in_array_initializer" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.comment.new_lines_at_block_boundaries" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_in_empty_annotation_declaration" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_before_closing_brace_in_array_initializer" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_annotation" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.blank_lines_before_field" value="0"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_while" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.use_on_off_tags" value="false"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_annotation_type_member_declaration" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_before_else_in_if_statement" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_prefix_operator" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.keep_else_statement_on_same_line" value="false"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_ellipsis" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.comment.insert_new_line_for_parameter" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_annotation_type_declaration" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.indent_breaks_compare_to_cases" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_at_in_annotation" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_multiple_fields" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_expressions_in_array_initializer" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_conditional_expression" value="80"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_for" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_binary_operator" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_question_in_wildcard" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.brace_position_for_array_initializer" value="end_of_line"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_enum_constant" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_before_finally_in_try_statement" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_after_annotation_on_local_variable" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_before_catch_in_try_statement" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_while" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.blank_lines_after_package" value="1"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_type_parameters" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.continuation_indentation" value="2"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_postfix_operator" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_arguments_in_method_invocation" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_angle_bracket_in_type_arguments" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_superinterfaces" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.blank_lines_before_new_chunk" value="1"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_binary_operator" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.blank_lines_before_package" value="0"/>
+<setting id="org.eclipse.jdt.core.compiler.source" value="1.7"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_enum_constant_arguments" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_constructor_declaration" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.comment.format_line_comments" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_closing_angle_bracket_in_type_arguments" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_enum_declarations" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.join_wrapped_lines" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_block" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_arguments_in_explicit_constructor_call" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_method_invocation_arguments" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.blank_lines_before_member_type" value="1"/>
+<setting id="org.eclipse.jdt.core.formatter.align_type_members_on_columns" value="false"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_enum_constant" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_for" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_method_declaration" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_selector_in_method_invocation" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_switch" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_unary_operator" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_colon_in_case" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.comment.indent_parameter_description" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_method_declaration" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_switch" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_enum_declaration" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_angle_bracket_in_type_parameters" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.comment.clear_blank_lines_in_block_comment" value="false"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_in_empty_type_declaration" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.lineSplit" value="120"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_if" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_between_brackets_in_array_type_reference" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_parenthesized_expression" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_explicitconstructorcall_arguments" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_constructor_declaration" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.blank_lines_before_first_class_body_declaration" value="0"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_after_annotation_on_method" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.indentation.size" value="2"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_method_declaration" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.enabling_tag" value="@formatter:on"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_enum_constant" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_superclass_in_type_declaration" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_assignment" value="0"/>
+<setting id="org.eclipse.jdt.core.compiler.problem.assertIdentifier" value="error"/>
+<setting id="org.eclipse.jdt.core.formatter.tabulation.char" value="tab"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_constructor_declaration_parameters" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_semicolon_in_try_resources" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_prefix_operator" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.indent_statements_compare_to_body" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.blank_lines_before_method" value="1"/>
+<setting id="org.eclipse.jdt.core.formatter.wrap_outer_expressions_when_nested" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.format_guardian_clause_on_one_line" value="false"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_colon_in_for" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_cast" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_parameters_in_constructor_declaration" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_colon_in_labeled_statement" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.brace_position_for_annotation_type_declaration" value="end_of_line"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_in_empty_method_body" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_method_declaration" value="0"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_method_invocation" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_try" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_bracket_in_array_allocation_expression" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_enum_constant" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_annotation" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_at_in_annotation_type_declaration" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_method_declaration_throws" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_if" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.brace_position_for_switch" value="end_of_line"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_method_declaration_throws" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_parenthesized_expression_in_return" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_annotation" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_question_in_conditional" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_question_in_wildcard" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_try" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_bracket_in_array_allocation_expression" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.comment.preserve_white_space_between_code_and_line_comments" value="false"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_parenthesized_expression_in_throw" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_type_arguments" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.compiler.problem.enumIdentifier" value="error"/>
+<setting id="org.eclipse.jdt.core.formatter.indent_switchstatements_compare_to_switch" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_ellipsis" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.brace_position_for_block" value="end_of_line"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_for_inits" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.brace_position_for_method_declaration" value="end_of_line"/>
+<setting id="org.eclipse.jdt.core.formatter.compact_else_if" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.wrap_before_or_operator_multicatch" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_array_initializer" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_for_increments" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.format_line_comment_starting_on_first_column" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_bracket_in_array_reference" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_after_annotation_on_field" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.comment.indent_root_tags" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.brace_position_for_enum_constant" value="end_of_line"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_enum_declarations" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_union_type_in_multicatch" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_explicitconstructorcall_arguments" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_switch" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_method_declaration_parameters" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_superinterfaces" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_allocation_expression" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.tabulation.size" value="2"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_bracket_in_array_type_reference" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_after_opening_brace_in_array_initializer" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_closing_brace_in_block" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_bracket_in_array_reference" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_in_empty_enum_constant" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_angle_bracket_in_type_arguments" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_constructor_declaration" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_constructor_declaration_throws" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_if" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.comment.clear_blank_lines_in_javadoc_comment" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_throws_clause_in_constructor_declaration" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_assignment_operator" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_assignment_operator" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.indent_empty_lines" value="false"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_synchronized" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_closing_paren_in_cast" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_method_declaration_parameters" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.brace_position_for_block_in_case" value="end_of_line"/>
+<setting id="org.eclipse.jdt.core.formatter.number_of_empty_lines_to_preserve" value="1"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_method_declaration" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_catch" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_constructor_declaration" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_method_invocation" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_bracket_in_array_reference" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_arguments_in_qualified_allocation_expression" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_and_in_type_parameter" value="insert"/>
+<setting id="org.eclipse.jdt.core.compiler.compliance" value="1.7"/>
+<setting id="org.eclipse.jdt.core.formatter.continuation_indentation_for_array_initializer" value="2"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_between_empty_brackets_in_array_allocation_expression" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_at_in_annotation_type_declaration" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_arguments_in_allocation_expression" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_cast" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_unary_operator" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_angle_bracket_in_parameterized_type_reference" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_anonymous_type_declaration" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.keep_empty_array_initializer_on_one_line" value="false"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_in_empty_enum_declaration" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.keep_imple_if_on_one_line" value="false"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_constructor_declaration_parameters" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_closing_angle_bracket_in_type_parameters" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_at_end_of_file_if_missing" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_colon_in_for" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_colon_in_labeled_statement" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_parameterized_type_reference" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_superinterfaces_in_type_declaration" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_binary_expression" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.brace_position_for_enum_declaration" value="end_of_line"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_after_annotation_on_type" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_while" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode" value="enabled"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_try" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.put_empty_statement_on_new_line" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_after_label" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_after_annotation_on_parameter" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_angle_bracket_in_type_parameters" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_method_invocation" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_before_while_in_do_statement" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_arguments_in_enum_constant" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.comment.format_javadoc_comments" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.comment.line_length" value="120"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_after_annotation_on_package" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.blank_lines_between_import_groups" value="1"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_enum_constant_arguments" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_semicolon" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.brace_position_for_constructor_declaration" value="end_of_line"/>
+<setting id="org.eclipse.jdt.core.formatter.number_of_blank_lines_at_beginning_of_method_body" value="0"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_colon_in_conditional" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.indent_body_declarations_compare_to_type_header" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_annotation_type_member_declaration" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.wrap_before_binary_operator" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.indent_body_declarations_compare_to_enum_declaration_header" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.blank_lines_between_type_declarations" value="1"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_synchronized" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.indent_statements_compare_to_block" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_superinterfaces_in_enum_declaration" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.join_lines_in_comments" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_question_in_conditional" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_multiple_field_declarations" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_compact_if" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_for_inits" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.indent_switchstatements_compare_to_cases" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_array_initializer" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_colon_in_default" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_and_in_type_parameter" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_constructor_declaration" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.blank_lines_before_imports" value="1"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_colon_in_assert" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.comment.format_html" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_throws_clause_in_method_declaration" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_angle_bracket_in_type_parameters" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_bracket_in_array_allocation_expression" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_in_empty_anonymous_type_declaration" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_colon_in_conditional" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_angle_bracket_in_parameterized_type_reference" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_for" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_postfix_operator" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.comment.format_source_code" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_synchronized" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_allocation_expression" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_constructor_declaration_throws" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_parameters_in_method_declaration" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_brace_in_array_initializer" value="insert"/>
+<setting id="org.eclipse.jdt.core.compiler.codegen.targetPlatform" value="1.7"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_resources_in_try" value="80"/>
+<setting id="org.eclipse.jdt.core.formatter.use_tabs_only_for_leading_indentations" value="false"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_arguments_in_annotation" value="16"/>
+<setting id="org.eclipse.jdt.core.formatter.comment.format_header" value="false"/>
+<setting id="org.eclipse.jdt.core.formatter.comment.format_block_comments" value="false"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_enum_constant" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.alignment_for_enum_constants" value="0"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_new_line_in_empty_block" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.indent_body_declarations_compare_to_annotation_declaration_header" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_parenthesized_expression" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_parenthesized_expression" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_catch" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_multiple_local_declarations" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_switch" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_for_increments" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_method_invocation" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_colon_in_assert" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.brace_position_for_type_declaration" value="end_of_line"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_array_initializer" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_between_empty_braces_in_array_initializer" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_method_declaration" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_semicolon_in_for" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_catch" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_angle_bracket_in_parameterized_type_reference" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_multiple_field_declarations" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_annotation" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_parameterized_type_reference" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_method_invocation_arguments" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.comment.new_lines_at_javadoc_boundaries" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.blank_lines_after_imports" value="1"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_multiple_local_declarations" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.indent_body_declarations_compare_to_enum_constant_header" value="true"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_after_semicolon_in_for" value="insert"/>
+<setting id="org.eclipse.jdt.core.formatter.never_indent_line_comments_on_first_column" value="false"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_semicolon_in_try_resources" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_angle_bracket_in_type_arguments" value="do not insert"/>
+<setting id="org.eclipse.jdt.core.formatter.never_indent_block_comments_on_first_column" value="false"/>
+<setting id="org.eclipse.jdt.core.formatter.keep_then_statement_on_same_line" value="false"/>
+</profile>
+</profiles>

pom.xml

@@ -1,300 +1,163 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>org.springframework.data</groupId>
-  <artifactId>spring-data-mongo-dist</artifactId>
-  <name>Spring Data MongoDB Distribution</name>
-  <version>1.0.0.M5</version>
-  <packaging>pom</packaging>
-  <modules>
-    <module>spring-data-mongodb</module>
-    <module>spring-data-mongodb-cross-store</module>
-    <module>spring-data-mongodb-log4j</module>
-    <module>spring-data-mongodb-parent</module>
-  </modules>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 
-  <developers>
-    <developer>
-      <id>trisberg</id>
-      <name>Thomas Risberg</name>
-      <email>trisberg at vmware.com</email>
-      <organization>SpringSource</organization>
-      <organizationUrl>http://www.SpringSource.com</organizationUrl>
-      <roles>
-        <role>Project Admin</role>
-        <role>Developer</role>
-      </roles>
-      <timezone>-5</timezone>
-    </developer>
-    <developer>
-      <id>mpollack</id>
-      <name>Mark Pollack</name>
-      <email>mpollack at vmware.com</email>
-      <organization>SpringSource</organization>
-      <organizationUrl>http://www.SpringSource.com</organizationUrl>
-      <roles>
-        <role>Project Admin</role>
-        <role>Developer</role>
-      </roles>
-      <timezone>-5</timezone>
-    </developer>
-    <developer>
-      <id>ogierke</id>
-      <name>Oliver Gierke</name>
-      <email>ogierke at vmware.com</email>
-      <organization>SpringSource</organization>
-      <organizationUrl>http://www.springsource.com</organizationUrl>
-      <roles>
-        <role>Developer</role>
-      </roles>
-      <timezone>+1</timezone>
-    </developer>
-    <developer>
-      <id>jbrisbin</id>
-      <name>Jon Brisbin</name>
-      <email>jbrisbin at vmware.com</email>
-      <organization>SpringSource</organization>
-      <organizationUrl>http://www.springsource.com</organizationUrl>
-      <roles>
-        <role>Developer</role>
-      </roles>
-      <timezone>-6</timezone>
-    </developer>
-  </developers>
+	<modelVersion>4.0.0</modelVersion>
 
-  <licenses>
-    <license>
-      <name>Apache License, Version 2.0</name>
-      <url>http://www.apache.org/licenses/LICENSE-2.0</url>
-      <comments>
-        Copyright 2010 the original author or authors.
+	<groupId>org.springframework.data</groupId>
+	<artifactId>spring-data-mongodb-parent</artifactId>
+	<version>1.6.0.M1</version>
+	<packaging>pom</packaging>
 
-        Licensed under the Apache License, Version 2.0 (the "License");
-        you may not use this file except in compliance with the License.
-        You may obtain a copy of the License at
+	<name>Spring Data MongoDB</name>
+	<description>MongoDB support for Spring Data</description>
+	<url>http://projects.spring.io/spring-data-mongodb</url>
 
-        http://www.apache.org/licenses/LICENSE-2.0
+	<parent>
+		<groupId>org.springframework.data.build</groupId>
+		<artifactId>spring-data-parent</artifactId>
+		<version>1.5.0.M1</version>
+		<relativePath>../spring-data-build/parent/pom.xml</relativePath>
+	</parent>
 
-        Unless required by applicable law or agreed to in writing, software
-        distributed under the License is distributed on an "AS IS" BASIS,
-        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-        implied.
-        See the License for the specific language governing permissions and
-        limitations under the License.
-      </comments>
-    </license>
-  </licenses>
+	<modules>
+		<module>spring-data-mongodb</module>
+		<module>spring-data-mongodb-cross-store</module>
+		<module>spring-data-mongodb-log4j</module>
+		<module>spring-data-mongodb-distribution</module>
+	</modules>
 
-  <properties>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <!-- dist.* properties are used by the antrun tasks below -->
-    <dist.id>spring-data-mongo</dist.id>
-    <dist.name>Spring Data Mongo</dist.name>
-    <dist.key>SDMONGO</dist.key>
-    <dist.version>${project.version}</dist.version>
-    <dist.releaseType>snapshot</dist.releaseType>
-    <dist.finalName>${dist.id}-${dist.version}</dist.finalName>
-    <dist.fileName>${dist.finalName}.zip</dist.fileName>
-    <dist.filePath>target/${dist.fileName}</dist.filePath>
-    <dist.bucketName>dist.springframework.org</dist.bucketName>
-    <!-- these properties should be in ~/.m2/settings.xml
-      <dist.accessKey>s3 access key</dist.accessKey>
-      <dist.secretKey>s3 secret key</dist.secretKey>
-      -->
-  </properties>
+	<properties>
+		<project.type>multi</project.type>
+		<dist.id>spring-data-mongodb</dist.id>
+		<springdata.commons>1.9.0.M1</springdata.commons>
+		<mongo>2.12.1</mongo>
+		<mongo.osgi>2.12.1</mongo.osgi>
+	</properties>
 
-  <build>
-    <extensions>
-      <extension>
-        <groupId>org.springframework.build.aws</groupId>
-        <artifactId>org.springframework.build.aws.maven</artifactId>
-        <version>3.1.0.RELEASE</version>
-      </extension>
-    </extensions>
+	<developers>
+		<developer>
+			<id>ogierke</id>
+			<name>Oliver Gierke</name>
+			<email>ogierke at gopivotal.com</email>
+			<organization>Pivotal</organization>
+			<organizationUrl>http://www.gopivotal.com</organizationUrl>
+			<roles>
+				<role>Project Lead</role>
+			</roles>
+			<timezone>+1</timezone>
+		</developer>
+		<developer>
+			<id>trisberg</id>
+			<name>Thomas Risberg</name>
+			<email>trisberg at vmware.com</email>
+			<organization>Pivotal</organization>
+			<organizationUrl>http://www.gopivotal.com</organizationUrl>
+			<roles>
+				<role>Developer</role>
+			</roles>
+			<timezone>-5</timezone>
+		</developer>
+		<developer>
+			<id>mpollack</id>
+			<name>Mark Pollack</name>
+			<email>mpollack at gopivotal.com</email>
+			<organization>Pivotal</organization>
+			<organizationUrl>http://www.gopivotal.com</organizationUrl>
+			<roles>
+				<role>Developer</role>
+			</roles>
+			<timezone>-5</timezone>
+		</developer>
+		<developer>
+			<id>jbrisbin</id>
+			<name>Jon Brisbin</name>
+			<email>jbrisbin at gopivotal.com</email>
+			<organization>Pivotal</organization>
+			<organizationUrl>http://www.gopivotal.com</organizationUrl>
+			<roles>
+				<role>Developer</role>
+			</roles>
+			<timezone>-6</timezone>
+		</developer>
+		<developer>
+			<id>tdarimont</id>
+			<name>Thomas Darimont</name>
+			<email>tdarimont at gopivotal.com</email>
+			<organization>Pivotal</organization>
+			<organizationUrl>http://www.gopivotal.com</organizationUrl>
+			<roles>
+				<role>Developer</role>
+			</roles>
+			<timezone>+1</timezone>
+		</developer>
+		<developer>
+			<id>cstrobl</id>
+			<name>Christoph Strobl</name>
+			<email>cstrobl at gopivotal.com</email>
+			<organization>Pivotal</organization>
+			<organizationUrl>http://www.gopivotal.com</organizationUrl>
+			<roles>
+				<role>Developer</role>
+			</roles>
+			<timezone>+1</timezone>
+		</developer>
+	</developers>
 
-    <plugins>
-      <plugin>
-        <groupId>com.agilejava.docbkx</groupId>
-        <artifactId>docbkx-maven-plugin</artifactId>
-	<!-- yes it really needs to be this (2.0.7) otherwise pdf generation from a clean build doesn't work -->
-        <version>2.0.7</version>
-        <executions>
-          <execution>
-            <goals>
-              <goal>generate-html</goal>
-              <goal>generate-pdf</goal>
-            </goals>
-            <phase>pre-site</phase>
-          </execution>
-        </executions>
-        <dependencies>
-          <dependency>
-            <groupId>org.docbook</groupId>
-            <artifactId>docbook-xml</artifactId>
-            <version>4.4</version>
-            <scope>runtime</scope>
-          </dependency>
-        </dependencies>
-        <configuration>
-          <includes>index.xml</includes>
-          <xincludeSupported>true</xincludeSupported>
-          <foCustomization>${project.basedir}/src/docbkx/resources/xsl/fopdf.xsl</foCustomization>
-          <htmlStylesheet>css/html.css</htmlStylesheet>
-          <chunkedOutput>false</chunkedOutput>
-          <htmlCustomization>${project.basedir}/src/docbkx/resources/xsl/html.xsl</htmlCustomization>
-          <useExtensions>1</useExtensions>
-          <highlightSource>1</highlightSource>
-          <highlightDefaultLanguage></highlightDefaultLanguage>
-          <!-- callouts -->
-          <entities>
-            <entity>
-              <name>version</name>
-              <value>${pom.version}</value>
-            </entity>
-          </entities>
-          <postProcess>
-            <copy todir="${project.basedir}/target/site/reference">
-              <fileset dir="${project.basedir}/target/docbkx">
-                <include name="**/*.html"/>
-                <include name="**/*.pdf"/>
-              </fileset>
-            </copy>
-            <copy todir="${project.basedir}/target/site/reference/html">
-              <fileset dir="${project.basedir}/src/docbkx/resources">
-                <include name="**/*.css"/>
-                <include name="**/*.png"/>
-                <include name="**/*.gif"/>
-                <include name="**/*.jpg"/>
-              </fileset>
-            </copy>
-            <copy todir="${project.basedir}/target/site/reference/html">
-              <fileset dir="${project.basedir}/src/docbkx/resources/images">
-                <include name="*.png"/>
-              </fileset>
-            </copy>
-            <move file="${project.basedir}/target/site/reference/pdf/index.pdf"
-                  tofile="${project.basedir}/target/site/reference/pdf/spring-data-mongo-reference.pdf"
-                  failonerror="false"/>
-          </postProcess>
-        </configuration>
-      </plugin>
+	<profiles>
+		<profile>
 
-      <plugin>
-        <artifactId>maven-javadoc-plugin</artifactId>
-        <version>2.5</version>
-        <configuration>
-          <javadoc:aggregate>true</javadoc:aggregate>
-          <breakiterator>true</breakiterator>
-          <header>Spring Data Document</header>
-          <source>1.5</source>
-          <quiet>true</quiet>
-          <javadocDirectory>${project.basedir}/src/main/javadoc</javadocDirectory>
-          <overview>${project.basedir}/src/main/javadoc/overview.html</overview>
-          <stylesheetfile>${project.basedir}/src/main/javadoc/spring-javadoc.css</stylesheetfile>
-          <!-- copies doc-files subdirectory which contains image resources -->
-          <docfilessubdirs>true</docfilessubdirs>
-          <links>
-            <link>http://static.springframework.org/spring/docs/3.0.x/javadoc-api</link>
-            <link>http://download.oracle.com/javase/1.5.0/docs/api</link>
-            <link>http://api.mongodb.org/java/2.3</link>
-          </links>
-        </configuration>
-      </plugin>
-      <plugin><!--
-				run `mvn package assembly:assembly` to trigger assembly creation.
-				see http://www.sonatype.com/books/mvnref-book/reference/assemblies-set-dist-assemblies.html -->
-        <artifactId>maven-assembly-plugin</artifactId>
-        <version>2.2-beta-5</version>
-        <inherited>false</inherited>
-        <executions>
-          <execution>
-            <id>distribution</id>
-            <goals>
-              <goal>single</goal>
-            </goals>
-            <phase>package</phase>
-            <configuration>
-              <descriptors>
-                <descriptor>${project.basedir}/src/assembly/distribution.xml</descriptor>
-              </descriptors>
-              <appendAssemblyId>false</appendAssemblyId>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-antrun-plugin</artifactId>
-        <version>1.4</version>
-        <executions>
-          <execution>
-            <id>upload-dist</id>
-            <phase>deploy</phase>
-            <configuration>
-              <tasks>
-                <ant antfile="${basedir}/src/ant/upload-dist.xml">
-                  <target name="upload-dist"/>
-                </ant>
-              </tasks>
-            </configuration>
-            <goals>
-              <goal>run</goal>
-            </goals>
-          </execution>
-        </executions>
-        <dependencies>
-          <dependency>
-            <groupId>org.springframework.build</groupId>
-            <artifactId>org.springframework.build.aws.ant</artifactId>
-            <version>3.0.5.RELEASE</version>
-          </dependency>
-          <dependency>
-            <groupId>net.java.dev.jets3t</groupId>
-            <artifactId>jets3t</artifactId>
-            <version>0.7.2</version>
-          </dependency>
-        </dependencies>
-      </plugin>
-    </plugins>
-    <!-- the name of this project is 'spring-data-mongo-dist';
-         make sure the zip file is just 'spring-data-mongo'. -->
-    <finalName>${dist.finalName}</finalName>
-  </build>
+			<id>mongo-next</id>
+			<properties>
+				<mongo>2.12.3-SNAPSHOT</mongo>
+			</properties>
 
-  <pluginRepositories>
-    <pluginRepository>
-      <!-- necessary for bundlor and utils -->
-      <id>repository.plugin.springsource.release</id>
-      <name>SpringSource Maven Repository</name>
-      <url>http://repository.springsource.com/maven/bundles/release</url>
-    </pluginRepository>
-    <pluginRepository>
-      <id>repository.springframework.maven.release</id>
-      <name>Spring Framework Maven Release Repository</name>
-      <url>http://maven.springframework.org/release</url>
-    </pluginRepository>
-  </pluginRepositories>
+			<repositories>
+				<repository>
+					<id>mongo-snapshots</id>
+					<url>https://oss.sonatype.org/content/repositories/snapshots</url>
+				</repository>
+			</repositories>
 
-  <distributionManagement>
-    <!-- see 'staging' profile for dry-run deployment settings -->
-    <downloadUrl>http://www.springsource.com/spring-data</downloadUrl>
-    <site>
-      <id>static.springframework.org</id>
-      <url>
-        scp://static.springframework.org/var/www/domains/springframework.org/static/htdocs/spring-data/data-document/snapshot-site/
-      </url>
-    </site>
-    <repository>
-      <id>spring-milestone</id>
-      <name>Spring Milestone Repository</name>
-      <url>s3://maven.springframework.org/milestone</url>
-    </repository>
-    <snapshotRepository>
-      <id>spring-snapshot</id>
-      <name>Spring Snapshot Repository</name>
-      <url>s3://maven.springframework.org/snapshot</url>
-    </snapshotRepository>
-  </distributionManagement>
+		</profile>
+
+		<profile>
+
+			<id>mongo-3-next</id>
+			<properties>
+				<mongo>3.0.0-SNAPSHOT</mongo>
+			</properties>
+
+			<repositories>
+				<repository>
+					<id>mongo-snapshots</id>
+					<url>https://oss.sonatype.org/content/repositories/snapshots</url>
+				</repository>
+			</repositories>
+
+		</profile>
+	</profiles>
+
+	<dependencies>
+		<!-- MongoDB -->
+		<dependency>
+			<groupId>org.mongodb</groupId>
+			<artifactId>mongo-java-driver</artifactId>
+			<version>${mongo}</version>
+		</dependency>
+	</dependencies>
+
+	<repositories>
+		<repository>
+			<id>spring-libs-milestone</id>
+			<url>http://repo.spring.io/libs-milestone</url>
+		</repository>
+	</repositories>
+
+	<pluginRepositories>
+		<pluginRepository>
+			<id>spring-plugins-release</id>
+			<url>http://repo.spring.io/plugins-release</url>
+		</pluginRepository>
+	</pluginRepositories>
 
 </project>

spring-data-mongodb-cross-store/pom.xml

@@ -1,218 +1,138 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <parent>
-    <groupId>org.springframework.data</groupId>
-    <artifactId>spring-data-mongodb-parent</artifactId>
-    <version>1.0.0.M5</version>
-    <relativePath>../spring-data-mongodb-parent/pom.xml</relativePath>
-  </parent>
-  <artifactId>spring-data-mongodb-cross-store</artifactId>
-  <name>Spring Data MongoDB Cross-store Persistence Support</name>
-  <dependencies>
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
 
-    <!--  Spring -->
-    <dependency>
-      <groupId>org.springframework</groupId>
-      <artifactId>spring-beans</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>org.springframework</groupId>
-      <artifactId>spring-tx</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>org.springframework</groupId>
-      <artifactId>spring-aspects</artifactId>
-      <version>${org.springframework.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>org.springframework</groupId>
-      <artifactId>spring-orm</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>org.springframework</groupId>
-      <artifactId>spring-test</artifactId>
-      <scope>test</scope>
-    </dependency>
+	<modelVersion>4.0.0</modelVersion>
+	
+	<parent>
+		<groupId>org.springframework.data</groupId>
+		<artifactId>spring-data-mongodb-parent</artifactId>
+		<version>1.6.0.M1</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+	
+	<artifactId>spring-data-mongodb-cross-store</artifactId>
+	<name>Spring Data MongoDB - Cross-Store Support</name>
+	
+	<properties>
+		<jpa>1.0.0.Final</jpa>
+		<hibernate>3.6.10.Final</hibernate>
+	</properties>
+	
+	<dependencies>
 
-    <!--  Spring Data -->
-    <dependency>
-      <groupId>org.springframework.data</groupId>
-      <artifactId>spring-data-commons-core</artifactId>
-    </dependency>
-    <!-- <dependency>
-      <groupId>org.springframework.data</groupId>
-      <artifactId>spring-data-commons-aspects</artifactId>
-    </dependency> -->
-    <dependency>
-      <groupId>org.springframework.data</groupId>
-      <artifactId>spring-data-mongodb</artifactId>
-    </dependency>
+		<!-- Spring -->
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-beans</artifactId>
+			<exclusions>
+				<exclusion>
+					<groupId>commons-logging</groupId>
+					<artifactId>commons-logging</artifactId>
+				</exclusion>
+			</exclusions>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-tx</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-aspects</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-orm</artifactId>
+		</dependency>
 
+		<!-- Spring Data -->
+		<dependency>
+			<groupId>org.springframework.data</groupId>
+			<artifactId>spring-data-mongodb</artifactId>
+			<version>1.6.0.M1</version>
+		</dependency>
 
-    <!-- Logging -->
-    <dependency>
-      <groupId>org.slf4j</groupId>
-      <artifactId>slf4j-api</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>org.slf4j</groupId>
-      <artifactId>jcl-over-slf4j</artifactId>
-      <scope>compile</scope>
-    </dependency>
-    <dependency>
-      <groupId>org.slf4j</groupId>
-      <artifactId>slf4j-log4j12</artifactId>
-      <scope>runtime</scope>
-    </dependency>
-    <dependency>
-      <groupId>log4j</groupId>
-      <artifactId>log4j</artifactId>
-      <exclusions>
-        <exclusion>
-          <groupId>javax.mail</groupId>
-          <artifactId>mail</artifactId>
-        </exclusion>
-        <exclusion>
-          <groupId>javax.jms</groupId>
-          <artifactId>jms</artifactId>
-        </exclusion>
-        <exclusion>
-          <groupId>com.sun.jdmk</groupId>
-          <artifactId>jmxtools</artifactId>
-        </exclusion>
-        <exclusion>
-          <groupId>com.sun.jmx</groupId>
-          <artifactId>jmxri</artifactId>
-        </exclusion>
-      </exclusions>
-      <scope>runtime</scope>
-    </dependency>
+		<dependency>
+			<groupId>org.aspectj</groupId>
+			<artifactId>aspectjrt</artifactId>
+			<version>${aspectj}</version>
+		</dependency>
 
-    <dependency>
-      <groupId>javax.annotation</groupId>
-      <artifactId>jsr250-api</artifactId>
-      <optional>true</optional>
-    </dependency>
+		<!-- JPA -->
+		<dependency>
+			<groupId>org.hibernate.javax.persistence</groupId>
+			<artifactId>hibernate-jpa-2.0-api</artifactId>
+			<version>${jpa}</version>
+			<optional>true</optional>
+		</dependency>
 
-    <dependency>
-      <groupId>org.mockito</groupId>
-      <artifactId>mockito-all</artifactId>
-      <scope>test</scope>
-    </dependency>
+		<!-- For Tests -->
+		<dependency>
+			<groupId>org.hibernate</groupId>
+			<artifactId>hibernate-entitymanager</artifactId>
+			<version>${hibernate}</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>hsqldb</groupId>
+			<artifactId>hsqldb</artifactId>
+			<version>1.8.0.10</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>javax.validation</groupId>
+			<artifactId>validation-api</artifactId>
+			<version>1.0.0.GA</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.hibernate</groupId>
+			<artifactId>hibernate-validator</artifactId>
+			<version>4.0.2.GA</version>
+			<scope>test</scope>
+		</dependency>
 
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-    </dependency>
+	</dependencies>
 
-    <dependency>
-      <groupId>org.aspectj</groupId>
-      <artifactId>aspectjrt</artifactId>
-      <version>${aspectj.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>cglib</groupId>
-      <artifactId>cglib</artifactId>
-      <version>2.2</version>
-    </dependency>
-
-    <!-- JPA -->
-    <dependency>
-      <groupId>org.hibernate.javax.persistence</groupId>
-      <artifactId>hibernate-jpa-2.0-api</artifactId>
-      <version>1.0.0.Final</version>
-    </dependency>
-
-  <!-- For Tests -->
-    <dependency>
-        <groupId>org.hibernate</groupId>
-        <artifactId>hibernate-entitymanager</artifactId>
-        <version>3.5.5-Final</version>
-        <scope>test</scope>
-    </dependency>
-    <dependency>
-        <groupId>hsqldb</groupId>
-        <artifactId>hsqldb</artifactId>
-        <version>1.8.0.10</version>
-        <scope>test</scope>
-    </dependency>
-    <dependency>
-        <groupId>javax.validation</groupId>
-        <artifactId>validation-api</artifactId>
-        <version>1.0.0.GA</version>
-        <scope>test</scope>
-    </dependency>
-    <dependency>
-        <groupId>org.hibernate</groupId>
-        <artifactId>hibernate-validator</artifactId>
-        <version>4.0.2.GA</version>
-        <scope>test</scope>
-    </dependency>
-
-  </dependencies>
-  <repositories>
-    <repository>
-      <id>jboss-repository</id>
-      <name>JBoss Public Repository</name>
-      <url>http://repository.jboss.org/nexus/content/groups/public-jboss</url>
-    </repository>
-  </repositories>
-  <pluginRepositories>
-    <pluginRepository>
-      <id>spring-maven-milestones</id>
-      <name>Springframework Maven Milestone Repository</name>
-      <url>http://maven.springframework.org/milestone</url>
-    </pluginRepository>
-    <pluginRepository>
-      <id>spring-maven-release</id>
-      <name>Springframework Maven Release Repository</name>
-      <url>http://maven.springframework.org/release</url>
-    </pluginRepository>
-  </pluginRepositories>
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>aspectj-maven-plugin</artifactId>
-        <version>1.2</version>
-        <dependencies>
-          <dependency>
-            <groupId>org.aspectj</groupId>
-            <artifactId>aspectjrt</artifactId>
-            <version>${aspectj.version}</version>
-          </dependency>
-          <dependency>
-            <groupId>org.aspectj</groupId>
-            <artifactId>aspectjtools</artifactId>
-            <version>${aspectj.version}</version>
-          </dependency>
-        </dependencies>
-        <executions>
-          <execution>
-            <goals>
-              <goal>compile</goal>
-              <goal>test-compile</goal>
-            </goals>
-          </execution>
-        </executions>
-        <configuration>
-          <outxml>true</outxml>
-          <aspectLibraries>
-            <aspectLibrary>
-              <groupId>org.springframework</groupId>
-              <artifactId>spring-aspects</artifactId>
-            </aspectLibrary>
-            <!-- <aspectLibrary>
-              <groupId>org.springframework.data</groupId>
-              <artifactId>spring-data-commons-aspects</artifactId>
-            </aspectLibrary> -->
-          </aspectLibraries>
-          <source>1.5</source>
-          <target>1.5</target>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.codehaus.mojo</groupId>
+				<artifactId>aspectj-maven-plugin</artifactId>
+				<version>1.6</version>
+				<dependencies>
+					<dependency>
+						<groupId>org.aspectj</groupId>
+						<artifactId>aspectjrt</artifactId>
+						<version>${aspectj}</version>
+					</dependency>
+					<dependency>
+						<groupId>org.aspectj</groupId>
+						<artifactId>aspectjtools</artifactId>
+						<version>${aspectj}</version>
+					</dependency>
+				</dependencies>
+				<executions>
+					<execution>
+						<goals>
+							<goal>compile</goal>
+							<goal>test-compile</goal>
+						</goals>
+					</execution>
+				</executions>
+				<configuration>
+					<outxml>true</outxml>
+					<aspectLibraries>
+						<aspectLibrary>
+							<groupId>org.springframework</groupId>
+							<artifactId>spring-aspects</artifactId>
+						</aspectLibrary>
+					</aspectLibraries> 
+					<complianceLevel>${source.level}</complianceLevel>
+					<source>${source.level}</source>
+					<target>${source.level}</target>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
 
 </project>

spring-data-mongodb-cross-store/src/main/java/org/springframework/data/mongodb/crossstore/MongoChangeSetPersister.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2011 the original author or authors.
+ * Copyright 2011-2014 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,8 +17,8 @@ package org.springframework.data.mongodb.crossstore;
 
 import javax.persistence.EntityManagerFactory;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.dao.DataAccessException;
 import org.springframework.dao.DataAccessResourceFailureException;
 import org.springframework.dao.DataIntegrityViolationException;
@@ -34,20 +34,20 @@ import com.mongodb.DBCollection;
 import com.mongodb.DBObject;
 import com.mongodb.MongoException;
 
+/**
+ * @author Thomas Risberg
+ * @author Oliver Gierke
+ */
 public class MongoChangeSetPersister implements ChangeSetPersister<Object> {
 
 	private static final String ENTITY_CLASS = "_entity_class";
-
 	private static final String ENTITY_ID = "_entity_id";
-
 	private static final String ENTITY_FIELD_NAME = "_entity_field_name";
-
 	private static final String ENTITY_FIELD_CLASS = "_entity_field_class";
 
-	protected final Log log = LogFactory.getLog(getClass());
+	protected final Logger log = LoggerFactory.getLogger(getClass());
 
 	private MongoTemplate mongoTemplate;
-
 	private EntityManagerFactory entityManagerFactory;
 
 	public void setMongoTemplate(MongoTemplate mongoTemplate) {
@@ -58,10 +58,12 @@ public class MongoChangeSetPersister implements ChangeSetPersister<Object> {
 		this.entityManagerFactory = entityManagerFactory;
 	}
 
-
-	public void getPersistentState(Class<? extends ChangeSetBacked> entityClass,
-			Object id, final ChangeSet changeSet)
-					throws DataAccessException, NotFoundException {
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.crossstore.ChangeSetPersister#getPersistentState(java.lang.Class, java.lang.Object, org.springframework.data.crossstore.ChangeSet)
+	 */
+	public void getPersistentState(Class<? extends ChangeSetBacked> entityClass, Object id, final ChangeSet changeSet)
+			throws DataAccessException, NotFoundException {
 
 		if (id == null) {
 			log.debug("Unable to load MongoDB data for null id");
@@ -77,8 +79,7 @@ public class MongoChangeSetPersister implements ChangeSetPersister<Object> {
 			log.debug("Loading MongoDB data for " + dbk);
 		}
 		mongoTemplate.execute(collName, new CollectionCallback<Object>() {
-			public Object doInCollection(DBCollection collection)
-					throws MongoException, DataAccessException {
+			public Object doInCollection(DBCollection collection) throws MongoException, DataAccessException {
 				for (DBObject dbo : collection.find(dbk)) {
 					String key = (String) dbo.get(ENTITY_FIELD_NAME);
 					if (log.isDebugEnabled()) {
@@ -87,9 +88,8 @@ public class MongoChangeSetPersister implements ChangeSetPersister<Object> {
 					if (!changeSet.getValues().containsKey(key)) {
 						String className = (String) dbo.get(ENTITY_FIELD_CLASS);
 						if (className == null) {
-							throw new DataIntegrityViolationException(
-									"Unble to convert property " + key
-									+ ": Invalid metadata, " + ENTITY_FIELD_CLASS + " not available");
+							throw new DataIntegrityViolationException("Unble to convert property " + key + ": Invalid metadata, "
+									+ ENTITY_FIELD_CLASS + " not available");
 						}
 						Class<?> clazz = ClassUtils.resolveClassName(className, ClassUtils.getDefaultClassLoader());
 						Object value = mongoTemplate.getConverter().read(clazz, dbo);
@@ -104,15 +104,25 @@ public class MongoChangeSetPersister implements ChangeSetPersister<Object> {
 		});
 	}
 
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.crossstore.ChangeSetPersister#getPersistentId(org.springframework.data.crossstore.ChangeSetBacked, org.springframework.data.crossstore.ChangeSet)
+	 */
 	public Object getPersistentId(ChangeSetBacked entity, ChangeSet cs) throws DataAccessException {
+
 		log.debug("getPersistentId called on " + entity);
+
 		if (entityManagerFactory == null) {
 			throw new DataAccessResourceFailureException("EntityManagerFactory cannot be null");
 		}
-		Object o = entityManagerFactory.getPersistenceUnitUtil().getIdentifier(entity);
-		return o;
+
+		return entityManagerFactory.getPersistenceUnitUtil().getIdentifier(entity);
 	}
 
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.crossstore.ChangeSetPersister#persistState(org.springframework.data.crossstore.ChangeSetBacked, org.springframework.data.crossstore.ChangeSet)
+	 */
 	public Object persistState(ChangeSetBacked entity, ChangeSet cs) throws DataAccessException {
 		if (cs == null) {
 			log.debug("Flush: changeset was null, nothing to flush.");
@@ -135,10 +145,8 @@ public class MongoChangeSetPersister implements ChangeSetPersister<Object> {
 				dbQuery.put(ENTITY_ID, getPersistentId(entity, cs));
 				dbQuery.put(ENTITY_CLASS, entity.getClass().getName());
 				dbQuery.put(ENTITY_FIELD_NAME, key);
-				DBObject dbId = mongoTemplate.execute(collName,
-						new CollectionCallback<DBObject>() {
-					public DBObject doInCollection(DBCollection collection)
-							throws MongoException, DataAccessException {
+				DBObject dbId = mongoTemplate.execute(collName, new CollectionCallback<DBObject>() {
+					public DBObject doInCollection(DBCollection collection) throws MongoException, DataAccessException {
 						return collection.findOne(dbQuery);
 					}
 				});
@@ -147,14 +155,12 @@ public class MongoChangeSetPersister implements ChangeSetPersister<Object> {
 						log.debug("Flush: removing: " + dbQuery);
 					}
 					mongoTemplate.execute(collName, new CollectionCallback<Object>() {
-						public Object doInCollection(DBCollection collection)
-								throws MongoException, DataAccessException {
+						public Object doInCollection(DBCollection collection) throws MongoException, DataAccessException {
 							collection.remove(dbQuery);
 							return null;
 						}
 					});
-				}
-				else {
+				} else {
 					final DBObject dbDoc = new BasicDBObject();
 					dbDoc.putAll(dbQuery);
 					if (log.isDebugEnabled()) {
@@ -166,8 +172,7 @@ public class MongoChangeSetPersister implements ChangeSetPersister<Object> {
 						dbDoc.put("_id", dbId.get("_id"));
 					}
 					mongoTemplate.execute(collName, new CollectionCallback<Object>() {
-						public Object doInCollection(DBCollection collection)
-								throws MongoException, DataAccessException {
+						public Object doInCollection(DBCollection collection) throws MongoException, DataAccessException {
 							collection.save(dbDoc);
 							return null;
 						}
@@ -178,8 +183,13 @@ public class MongoChangeSetPersister implements ChangeSetPersister<Object> {
 		return 0L;
 	}
 
+	/**
+	 * Returns the collection the given entity type shall be persisted to.
+	 * 
+	 * @param entityClass must not be {@literal null}.
+	 * @return
+	 */
 	private String getCollectionNameForEntity(Class<? extends ChangeSetBacked> entityClass) {
-		return ClassUtils.getQualifiedName(entityClass);
+		return mongoTemplate.getCollectionName(entityClass);
 	}
-
 }

spring-data-mongodb-cross-store/src/main/java/org/springframework/data/mongodb/crossstore/MongoDocumentBacking.aj

@@ -21,13 +21,12 @@ import javax.persistence.EntityManager;
 import javax.persistence.Transient;
 import javax.persistence.Entity;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.aspectj.lang.JoinPoint;
 import org.aspectj.lang.reflect.FieldSignature;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.dao.DataAccessException;
-
 import org.springframework.data.mongodb.crossstore.RelatedDocument;
 import org.springframework.data.mongodb.crossstore.DocumentBacked;
 import org.springframework.data.crossstore.ChangeSetBackedTransactionSynchronization;
@@ -38,235 +37,234 @@ import org.springframework.data.crossstore.HashMapChangeSet;
 import org.springframework.transaction.support.TransactionSynchronizationManager;
 
 /**
- * Aspect to turn an object annotated with @Document into a persistent document
- * using Mongo.
+ * Aspect to turn an object annotated with @Document into a persistent document using Mongo.
  * 
  * @author Thomas Risberg
  */
 public aspect MongoDocumentBacking {
 
-  private static final Log LOGGER = LogFactory
-      .getLog(MongoDocumentBacking.class);
+	private static final Logger LOGGER = LoggerFactory.getLogger(MongoDocumentBacking.class);
 
-  // Aspect shared config
-  private ChangeSetPersister<Object> changeSetPersister;
+	// Aspect shared config
+	private ChangeSetPersister<Object> changeSetPersister;
 
-  public void setChangeSetPersister(
-      ChangeSetPersister<Object> changeSetPersister) {
-    this.changeSetPersister = changeSetPersister;
-  }
+	public void setChangeSetPersister(ChangeSetPersister<Object> changeSetPersister) {
+		this.changeSetPersister = changeSetPersister;
+	}
 
-  // ITD to introduce N state to Annotated objects
-  declare parents : (@Entity *) implements DocumentBacked;
+	// ITD to introduce N state to Annotated objects
+	declare parents : (@Entity *) implements DocumentBacked;
 
-  // The annotated fields that will be persisted in MongoDB rather than with JPA
-  declare @field: @RelatedDocument * (@Entity+ *).*:@Transient;
+	// The annotated fields that will be persisted in MongoDB rather than with JPA
+	declare @field: @RelatedDocument * (@Entity+ *).*:@Transient;
 
-  // -------------------------------------------------------------------------
-  // Advise user-defined constructors of ChangeSetBacked objects to create a new
-  // backing ChangeSet
-  // -------------------------------------------------------------------------
-  pointcut arbitraryUserConstructorOfChangeSetBackedObject(DocumentBacked entity) : 
+	// -------------------------------------------------------------------------
+	// Advise user-defined constructors of ChangeSetBacked objects to create a new
+	// backing ChangeSet
+	// -------------------------------------------------------------------------
+	pointcut arbitraryUserConstructorOfChangeSetBackedObject(DocumentBacked entity) : 
 		execution((DocumentBacked+).new(..)) &&
 		!execution((DocumentBacked+).new(ChangeSet)) &&
 		this(entity);
 
-  pointcut finderConstructorOfChangeSetBackedObject(DocumentBacked entity,
-      ChangeSet cs) : 
+	pointcut finderConstructorOfChangeSetBackedObject(DocumentBacked entity, ChangeSet cs) : 
 		execution((DocumentBacked+).new(ChangeSet)) &&
 		this(entity) && 
 		args(cs);
 
-  protected pointcut entityFieldGet(DocumentBacked entity) :
+	protected pointcut entityFieldGet(DocumentBacked entity) :
         get(@RelatedDocument * DocumentBacked+.*) &&
         this(entity) &&
         !get(* DocumentBacked.*);
 
-  protected pointcut entityFieldSet(DocumentBacked entity, Object newVal) :
+	protected pointcut entityFieldSet(DocumentBacked entity, Object newVal) :
         set(@RelatedDocument * DocumentBacked+.*) &&
         this(entity) &&
         args(newVal) &&
         !set(* DocumentBacked.*);
 
-  // intercept EntityManager.merge calls
-  public pointcut entityManagerMerge(EntityManager em, Object entity) : 
+	// intercept EntityManager.merge calls
+	public pointcut entityManagerMerge(EntityManager em, Object entity) : 
     call(* EntityManager.merge(Object)) &&
     target(em) &&
     args(entity);
-  
-  // intercept EntityManager.remove calls
-//  public pointcut entityManagerRemove(EntityManager em, Object entity) : 
-//    call(* EntityManager.remove(Object)) &&
-//    target(em) &&
-//    args(entity);
 
-  // move changeSet from detached entity to the newly merged persistent object
-  Object around(EntityManager em, Object entity) : entityManagerMerge(em, entity) {
-    Object mergedEntity = proceed(em, entity);
-    if (entity instanceof DocumentBacked && mergedEntity instanceof DocumentBacked) {
-      ((DocumentBacked)mergedEntity).changeSet = ((DocumentBacked)entity).getChangeSet();
-    }
-    return mergedEntity;
-  }
+	// intercept EntityManager.remove calls
+	// public pointcut entityManagerRemove(EntityManager em, Object entity) :
+	// call(* EntityManager.remove(Object)) &&
+	// target(em) &&
+	// args(entity);
 
-  // clear changeSet from removed entity
-//  Object around(EntityManager em, Object entity) : entityManagerRemove(em, entity) {
-//    if (entity instanceof DocumentBacked) {
-//      removeChangeSetValues((DocumentBacked)entity);
-//    }
-//    return proceed(em, entity);
-//  }
-
-  private static void removeChangeSetValues(DocumentBacked entity) {
-    LOGGER.debug("Removing all change-set values for " + entity);	
-	ChangeSet nulledCs = new HashMapChangeSet();
-	DocumentBacked documentEntity = (DocumentBacked) entity;
-	@SuppressWarnings("unchecked")
-	ChangeSetPersister<Object> changeSetPersister = (ChangeSetPersister<Object>)documentEntity.itdChangeSetPersister;
-	try {
-        changeSetPersister.getPersistentState(
-            documentEntity.getClass(),
-            documentEntity.get_persistent_id(), 
-            documentEntity.getChangeSet());
-	} 
-	catch (DataAccessException e) {} 
-	catch (NotFoundException e) {}
-	for (String key :entity.getChangeSet().getValues().keySet()) {
-        nulledCs.set(key, null);
+	// move changeSet from detached entity to the newly merged persistent object
+	Object around(EntityManager em, Object entity) : entityManagerMerge(em, entity) {
+		Object mergedEntity = proceed(em, entity);
+		if (entity instanceof DocumentBacked && mergedEntity instanceof DocumentBacked) {
+			((DocumentBacked) mergedEntity).changeSet = ((DocumentBacked) entity).getChangeSet();
+		}
+		return mergedEntity;
 	}
-	entity.setChangeSet(nulledCs);
-  }
 
-  before(DocumentBacked entity) : arbitraryUserConstructorOfChangeSetBackedObject(entity) {
-    LOGGER
-        .debug("User-defined constructor called on DocumentBacked object of class "
-            + entity.getClass());
-    // Populate all ITD fields
-    entity.setChangeSet(new HashMapChangeSet());
-    entity.itdChangeSetPersister = changeSetPersister;
-    entity.itdTransactionSynchronization = 
-        new ChangeSetBackedTransactionSynchronization(changeSetPersister, entity);
-    //registerTransactionSynchronization(entity);
-  }
+	// clear changeSet from removed entity
+	// Object around(EntityManager em, Object entity) : entityManagerRemove(em, entity) {
+	// if (entity instanceof DocumentBacked) {
+	// removeChangeSetValues((DocumentBacked)entity);
+	// }
+	// return proceed(em, entity);
+	// }
 
-  private static void registerTransactionSynchronization(DocumentBacked entity) {
-    if (TransactionSynchronizationManager.isSynchronizationActive()) {
-      if (!TransactionSynchronizationManager.getSynchronizations().contains(entity.itdTransactionSynchronization)) {
-        if (LOGGER.isDebugEnabled()) {
-          LOGGER.debug("Adding transaction synchronization for " + entity);
-        }
-        TransactionSynchronizationManager.registerSynchronization(entity.itdTransactionSynchronization);
-      }
-      else {
-        if (LOGGER.isDebugEnabled()) {
-          LOGGER.debug("Transaction synchronization already active for " + entity);
-        }
-      }
-    }
-    else {
-      if (LOGGER.isDebugEnabled()) {
-        LOGGER.debug("Transaction synchronization is not active for " + entity);
-      }
-    }
-  }
+	private static void removeChangeSetValues(DocumentBacked entity) {
+		LOGGER.debug("Removing all change-set values for " + entity);
+		ChangeSet nulledCs = new HashMapChangeSet();
+		DocumentBacked documentEntity = (DocumentBacked) entity;
+		@SuppressWarnings("unchecked")
+		ChangeSetPersister<Object> changeSetPersister = (ChangeSetPersister<Object>) documentEntity.itdChangeSetPersister;
+		try {
+			changeSetPersister.getPersistentState(documentEntity.getClass(), documentEntity.get_persistent_id(),
+					documentEntity.getChangeSet());
+		} catch (DataAccessException e) {
+		} catch (NotFoundException e) {
+		}
+		for (String key : entity.getChangeSet().getValues().keySet()) {
+			nulledCs.set(key, null);
+		}
+		entity.setChangeSet(nulledCs);
+	}
 
-  // -------------------------------------------------------------------------
-  // ChangeSet-related mixins
-  // -------------------------------------------------------------------------
-  // Introduced field
-  @Transient private ChangeSet DocumentBacked.changeSet;
+	before(DocumentBacked entity) : arbitraryUserConstructorOfChangeSetBackedObject(entity) {
+		LOGGER.debug("User-defined constructor called on DocumentBacked object of class " + entity.getClass());
+		// Populate all ITD fields
+		entity.setChangeSet(new HashMapChangeSet());
+		entity.itdChangeSetPersister = changeSetPersister;
+		entity.itdTransactionSynchronization = new ChangeSetBackedTransactionSynchronization(changeSetPersister, entity);
+		// registerTransactionSynchronization(entity);
+	}
 
-  @Transient private ChangeSetPersister<?> DocumentBacked.itdChangeSetPersister;
+	private static void registerTransactionSynchronization(DocumentBacked entity) {
+		if (TransactionSynchronizationManager.isSynchronizationActive()) {
+			if (!TransactionSynchronizationManager.getSynchronizations().contains(entity.itdTransactionSynchronization)) {
+				if (LOGGER.isDebugEnabled()) {
+					LOGGER.debug("Adding transaction synchronization for " + entity);
+				}
+				TransactionSynchronizationManager.registerSynchronization(entity.itdTransactionSynchronization);
+			} else {
+				if (LOGGER.isDebugEnabled()) {
+					LOGGER.debug("Transaction synchronization already active for " + entity);
+				}
+			}
+		} else {
+			if (LOGGER.isDebugEnabled()) {
+				LOGGER.debug("Transaction synchronization is not active for " + entity);
+			}
+		}
+	}
 
-  @Transient private ChangeSetBackedTransactionSynchronization DocumentBacked.itdTransactionSynchronization;
+	// -------------------------------------------------------------------------
+	// ChangeSet-related mixins
+	// -------------------------------------------------------------------------
+	// Introduced field
+	@Transient
+	private ChangeSet DocumentBacked.changeSet;
 
-  public void DocumentBacked.setChangeSet(ChangeSet cs) {
-    this.changeSet = cs;
-  }
+	@Transient
+	private ChangeSetPersister<?> DocumentBacked.itdChangeSetPersister;
 
-  public ChangeSet DocumentBacked.getChangeSet() {
-    return changeSet;
-  }
+	@Transient
+	private ChangeSetBackedTransactionSynchronization DocumentBacked.itdTransactionSynchronization;
 
-  // Flush the entity state to the persistent store
-  public void DocumentBacked.flush() {
-    Object id = itdChangeSetPersister.getPersistentId(this, this.changeSet);
-    itdChangeSetPersister.persistState(this, this.changeSet);
-  }
+	public void DocumentBacked.setChangeSet(ChangeSet cs) {
+		this.changeSet = cs;
+	}
 
-  public Object DocumentBacked.get_persistent_id() {
-    return itdChangeSetPersister.getPersistentId(this, this.changeSet);
-  }
+	public ChangeSet DocumentBacked.getChangeSet() {
+		return changeSet;
+	}
 
-  // lifecycle methods
-  @javax.persistence.PostPersist public void DocumentBacked.itdPostPersist() {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("JPA lifecycle event PrePersist: " + this.getClass().getName());
-    }
-    registerTransactionSynchronization(this);
-  }
-  @javax.persistence.PreUpdate public void DocumentBacked.itdPreUpdate() {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("JPA lifecycle event PreUpdate: " + this.getClass().getName() + " :: " + this);
-    }
-    registerTransactionSynchronization(this);
-  }
-  @javax.persistence.PostUpdate public void DocumentBacked.itdPostUpdate() {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("JPA lifecycle event PostUpdate: " + this.getClass().getName() + " :: " + this);
-    }
-    registerTransactionSynchronization(this);
-  }
-  @javax.persistence.PostRemove public void DocumentBacked.itdPostRemove() {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("JPA lifecycle event PostRemove: " + this.getClass().getName() + " :: " + this);
-    }
-    registerTransactionSynchronization(this);
-    removeChangeSetValues(this);
-  }
-  @javax.persistence.PostLoad public void DocumentBacked.itdPostLoad() {
-    if (LOGGER.isDebugEnabled()) {
-      LOGGER.debug("JPA lifecycle event PostLoad: " + this.getClass().getName() + " :: " + this);
-    }
-    registerTransactionSynchronization(this);
-  }
-  
-  /**
-   * delegates field reads to the state accessors instance
-   */
-  Object around(DocumentBacked entity): entityFieldGet(entity) {
-    Field f = field(thisJoinPoint);
-    String propName = f.getName();
-    LOGGER.trace("GET " + f + " -> ChangeSet value property [" + propName
-        + "] using: " + entity.getChangeSet());
-    if (entity.getChangeSet().getValues().get(propName) == null) {
-      try {
-        this.changeSetPersister.getPersistentState(entity.getClass(),
-            entity.get_persistent_id(), entity.getChangeSet());
-      } catch (NotFoundException e) {
-      }
-    }
-    Object fValue = entity.getChangeSet().getValues().get(propName);
-    if (fValue != null) {
-      return fValue;
-    }
-    return proceed(entity);
-  }
+	// Flush the entity state to the persistent store
+	public void DocumentBacked.flush() {
+		Object id = itdChangeSetPersister.getPersistentId(this, this.changeSet);
+		itdChangeSetPersister.persistState(this, this.changeSet);
+	}
 
-  /**
-   * delegates field writes to the state accessors instance
-   */
-  Object around(DocumentBacked entity, Object newVal) : entityFieldSet(entity, newVal) {
-    Field f = field(thisJoinPoint);
-    String propName = f.getName();
-    LOGGER.trace("SET " + f + " -> ChangeSet number value property [" + propName
-        + "] with value=[" + newVal + "]");
-    entity.getChangeSet().set(propName, newVal);
-    return proceed(entity, newVal);
-  }
+	public Object DocumentBacked.get_persistent_id() {
+		return itdChangeSetPersister.getPersistentId(this, this.changeSet);
+	}
 
-  Field field(JoinPoint joinPoint) {
-    FieldSignature fieldSignature = (FieldSignature) joinPoint.getSignature();
-    return fieldSignature.getField();
-  }
+	// lifecycle methods
+	@javax.persistence.PostPersist
+	public void DocumentBacked.itdPostPersist() {
+		if (LOGGER.isDebugEnabled()) {
+			LOGGER.debug("JPA lifecycle event PrePersist: " + this.getClass().getName());
+		}
+		registerTransactionSynchronization(this);
+	}
+
+	@javax.persistence.PreUpdate
+	public void DocumentBacked.itdPreUpdate() {
+		if (LOGGER.isDebugEnabled()) {
+			LOGGER.debug("JPA lifecycle event PreUpdate: " + this.getClass().getName() + " :: " + this);
+		}
+		registerTransactionSynchronization(this);
+	}
+
+	@javax.persistence.PostUpdate
+	public void DocumentBacked.itdPostUpdate() {
+		if (LOGGER.isDebugEnabled()) {
+			LOGGER.debug("JPA lifecycle event PostUpdate: " + this.getClass().getName() + " :: " + this);
+		}
+		registerTransactionSynchronization(this);
+	}
+
+	@javax.persistence.PostRemove
+	public void DocumentBacked.itdPostRemove() {
+		if (LOGGER.isDebugEnabled()) {
+			LOGGER.debug("JPA lifecycle event PostRemove: " + this.getClass().getName() + " :: " + this);
+		}
+		registerTransactionSynchronization(this);
+		removeChangeSetValues(this);
+	}
+
+	@javax.persistence.PostLoad
+	public void DocumentBacked.itdPostLoad() {
+		if (LOGGER.isDebugEnabled()) {
+			LOGGER.debug("JPA lifecycle event PostLoad: " + this.getClass().getName() + " :: " + this);
+		}
+		registerTransactionSynchronization(this);
+	}
+
+	/**
+	 * delegates field reads to the state accessors instance
+	 */
+	Object around(DocumentBacked entity): entityFieldGet(entity) {
+		Field f = field(thisJoinPoint);
+		String propName = f.getName();
+		LOGGER.trace("GET " + f + " -> ChangeSet value property [" + propName + "] using: " + entity.getChangeSet());
+		if (entity.getChangeSet().getValues().get(propName) == null) {
+			try {
+				this.changeSetPersister
+						.getPersistentState(entity.getClass(), entity.get_persistent_id(), entity.getChangeSet());
+			} catch (NotFoundException e) {
+			}
+		}
+		Object fValue = entity.getChangeSet().getValues().get(propName);
+		if (fValue != null) {
+			return fValue;
+		}
+		return proceed(entity);
+	}
+
+	/**
+	 * delegates field writes to the state accessors instance
+	 */
+	Object around(DocumentBacked entity, Object newVal) : entityFieldSet(entity, newVal) {
+		Field f = field(thisJoinPoint);
+		String propName = f.getName();
+		LOGGER.trace("SET " + f + " -> ChangeSet number value property [" + propName + "] with value=[" + newVal + "]");
+		entity.getChangeSet().set(propName, newVal);
+		return proceed(entity, newVal);
+	}
+
+	Field field(JoinPoint joinPoint) {
+		FieldSignature fieldSignature = (FieldSignature) joinPoint.getSignature();
+		return fieldSignature.getField();
+	}
 }

spring-data-mongodb-cross-store/src/main/java/org/springframework/data/mongodb/crossstore/RelatedDocument.java

@@ -24,8 +24,6 @@ import java.lang.annotation.Target;
  * @author Thomas Risberg
  */
 @Retention(RetentionPolicy.RUNTIME)
-@Target({
-    ElementType.FIELD
-})
+@Target({ ElementType.FIELD })
 public @interface RelatedDocument {
 }

spring-data-mongodb-cross-store/src/main/java/org/springframework/data/mongodb/crossstore/package-info.java

@@ -0,0 +1,5 @@
+/**
+ * Infrastructure for Spring Data's MongoDB cross store support.
+ */
+package org.springframework.data.mongodb.crossstore;
+

spring-data-mongodb-cross-store/src/test/java/org/springframework/data/mongodb/crossstore/CrossStoreMongoTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2011 the original author or authors.
+ * Copyright 2011-2013 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,7 +18,9 @@ package org.springframework.data.mongodb.crossstore;
 import javax.persistence.EntityManager;
 import javax.persistence.PersistenceContext;
 
+import org.junit.After;
 import org.junit.Assert;
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -26,7 +28,6 @@ import org.springframework.data.mongodb.core.MongoTemplate;
 import org.springframework.data.mongodb.crossstore.test.Address;
 import org.springframework.data.mongodb.crossstore.test.Person;
 import org.springframework.data.mongodb.crossstore.test.Resume;
-import org.springframework.test.annotation.Rollback;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 import org.springframework.transaction.PlatformTransactionManager;
@@ -35,92 +36,119 @@ import org.springframework.transaction.annotation.Transactional;
 import org.springframework.transaction.support.TransactionCallback;
 import org.springframework.transaction.support.TransactionTemplate;
 
-import com.mongodb.DBCollection;
 import com.mongodb.DBObject;
 
+/**
+ * Integration tests for MongoDB cross-store persistence (mainly {@link MongoChangeSetPersister}).
+ * 
+ * @author Thomas Risberg
+ * @author Oliver Gierke
+ */
 @RunWith(SpringJUnit4ClassRunner.class)
-@ContextConfiguration(locations = "classpath:/META-INF/spring/applicationContext.xml")
+@ContextConfiguration("classpath:/META-INF/spring/applicationContext.xml")
 public class CrossStoreMongoTests {
 
 	@Autowired
-	private MongoTemplate mongoTemplate;
-
-	private EntityManager entityManager;
-
-	@Autowired
-	private PlatformTransactionManager transactionManager;
+	MongoTemplate mongoTemplate;
 
 	@PersistenceContext
-	public void setEntityManager(EntityManager entityManager) {
-		this.entityManager = entityManager;
+	EntityManager entityManager;
+
+	@Autowired
+	PlatformTransactionManager transactionManager;
+	TransactionTemplate txTemplate;
+
+	@Before
+	public void setUp() {
+
+		txTemplate = new TransactionTemplate(transactionManager);
+
+		clearData(Person.class);
+
+		Address address = new Address(12, "MAin St.", "Boston", "MA", "02101");
+
+		Resume resume = new Resume();
+		resume.addEducation("Skanstulls High School, 1975");
+		resume.addEducation("Univ. of Stockholm, 1980");
+		resume.addJob("DiMark, DBA, 1990-2000");
+		resume.addJob("VMware, Developer, 2007-");
+
+		final Person person = new Person("Thomas", 20);
+		person.setAddress(address);
+		person.setResume(resume);
+		person.setId(1L);
+
+		txTemplate.execute(new TransactionCallback<Void>() {
+			public Void doInTransaction(TransactionStatus status) {
+				entityManager.persist(person);
+				return null;
+			}
+		});
 	}
 
-	private void clearData(String collectionName) {
-		DBCollection col = this.mongoTemplate.getCollection(collectionName);
-		if (col != null) {
-			this.mongoTemplate.dropCollection(collectionName);
-		}
+	@After
+	public void tearDown() {
+		txTemplate.execute(new TransactionCallback<Void>() {
+			public Void doInTransaction(TransactionStatus status) {
+				entityManager.remove(entityManager.find(Person.class, 1L));
+				return null;
+			}
+		});
+	}
+
+	private void clearData(Class<?> domainType) {
+
+		String collectionName = mongoTemplate.getCollectionName(domainType);
+		mongoTemplate.dropCollection(collectionName);
 	}
 
 	@Test
 	@Transactional
-	@Rollback(false)
-	public void testCreateJpaToMongoEntityRelationship() {
-		clearData(Person.class.getName());
-		Person p = new Person("Thomas", 20);
-		Address a = new Address(12, "MAin St.", "Boston", "MA", "02101");
-		p.setAddress(a);
-		Resume r = new Resume();
-		r.addEducation("Skanstulls High School, 1975");
-		r.addEducation("Univ. of Stockholm, 1980");
-		r.addJob("DiMark, DBA, 1990-2000");
-		r.addJob("VMware, Developer, 2007-");
-		p.setResume(r);
-		p.setId(1L);
-		entityManager.persist(p);
-	}
-
-	@Test
-	@Transactional
-	@Rollback(false)
 	public void testReadJpaToMongoEntityRelationship() {
+
 		Person found = entityManager.find(Person.class, 1L);
 		Assert.assertNotNull(found);
 		Assert.assertEquals(Long.valueOf(1), found.getId());
 		Assert.assertNotNull(found);
 		Assert.assertEquals(Long.valueOf(1), found.getId());
 		Assert.assertNotNull(found.getResume());
-		Assert.assertEquals("DiMark, DBA, 1990-2000" + "; "
-				+ "VMware, Developer, 2007-", found.getResume().getJobs());
-		found.getResume().addJob("SpringDeveloper.com, Consultant, 2005-2006");
-		found.setAge(44);
+		Assert.assertEquals("DiMark, DBA, 1990-2000" + "; " + "VMware, Developer, 2007-", found.getResume().getJobs());
 	}
 
 	@Test
 	@Transactional
-	@Rollback(false)
 	public void testUpdatedJpaToMongoEntityRelationship() {
+
 		Person found = entityManager.find(Person.class, 1L);
+		found.setAge(44);
+		found.getResume().addJob("SpringDeveloper.com, Consultant, 2005-2006");
+
+		entityManager.merge(found);
+
 		Assert.assertNotNull(found);
 		Assert.assertEquals(Long.valueOf(1), found.getId());
 		Assert.assertNotNull(found);
 		Assert.assertEquals(Long.valueOf(1), found.getId());
 		Assert.assertNotNull(found.getResume());
-		Assert.assertEquals("DiMark, DBA, 1990-2000" + "; "
-				+ "VMware, Developer, 2007-" + "; "
+		Assert.assertEquals("DiMark, DBA, 1990-2000" + "; " + "VMware, Developer, 2007-" + "; "
 				+ "SpringDeveloper.com, Consultant, 2005-2006", found.getResume().getJobs());
 	}
 
 	@Test
 	public void testMergeJpaEntityWithMongoDocument() {
-		TransactionTemplate txTemplate = new TransactionTemplate(transactionManager);
+
 		final Person detached = entityManager.find(Person.class, 1L);
+		entityManager.detach(detached);
 		detached.getResume().addJob("TargetRx, Developer, 2000-2005");
+
 		Person merged = txTemplate.execute(new TransactionCallback<Person>() {
 			public Person doInTransaction(TransactionStatus status) {
-				return entityManager.merge(detached);
+				Person result = entityManager.merge(detached);
+				entityManager.flush();
+				return result;
 			}
 		});
+
 		Assert.assertTrue(detached.getResume().getJobs().contains("TargetRx, Developer, 2000-2005"));
 		Assert.assertTrue(merged.getResume().getJobs().contains("TargetRx, Developer, 2000-2005"));
 		final Person updated = entityManager.find(Person.class, 1L);
@@ -129,7 +157,7 @@ public class CrossStoreMongoTests {
 
 	@Test
 	public void testRemoveJpaEntityWithMongoDocument() {
-		TransactionTemplate txTemplate = new TransactionTemplate(transactionManager);
+
 		txTemplate.execute(new TransactionCallback<Person>() {
 			public Person doInTransaction(TransactionStatus status) {
 				Person p2 = new Person("Thomas", 20);
@@ -156,8 +184,10 @@ public class CrossStoreMongoTests {
 				return null;
 			}
 		});
+
 		boolean weFound3 = false;
-		for (DBObject dbo : this.mongoTemplate.getCollection(Person.class.getName()).find()) {
+
+		for (DBObject dbo : this.mongoTemplate.getCollection(mongoTemplate.getCollectionName(Person.class)).find()) {
 			Assert.assertTrue(!dbo.get("_entity_id").equals(2L));
 			if (dbo.get("_entity_id").equals(3L)) {
 				weFound3 = true;

spring-data-mongodb-cross-store/src/test/java/org/springframework/data/mongodb/crossstore/test/Address.java

@@ -23,8 +23,7 @@ public class Address {
 	private String state;
 	private String zip;
 
-	public Address(Integer streetNumber, String streetName, String city,
-			String state, String zip) {
+	public Address(Integer streetNumber, String streetName, String city, String state, String zip) {
 		super();
 		this.streetNumber = streetNumber;
 		this.streetName = streetName;
@@ -36,34 +35,41 @@ public class Address {
 	public Integer getStreetNumber() {
 		return streetNumber;
 	}
+
 	public void setStreetNumber(Integer streetNumber) {
 		this.streetNumber = streetNumber;
 	}
+
 	public String getStreetName() {
 		return streetName;
 	}
+
 	public void setStreetName(String streetName) {
 		this.streetName = streetName;
 	}
+
 	public String getCity() {
 		return city;
 	}
+
 	public void setCity(String city) {
 		this.city = city;
 	}
+
 	public String getState() {
 		return state;
 	}
+
 	public void setState(String state) {
 		this.state = state;
 	}
+
 	public String getZip() {
 		return zip;
 	}
+
 	public void setZip(String zip) {
 		this.zip = zip;
 	}
 
-
-
 }

spring-data-mongodb-cross-store/src/test/resources/log4j.properties

@@ -1,12 +0,0 @@
-log4j.rootCategory=INFO, stdout
-
-log4j.appender.stdout=org.apache.log4j.ConsoleAppender
-log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
-log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %40.40c:%4L - %m%n
-
-log4j.category.org.springframework=INFO
-log4j.category.org.springframework.data=TRACE
-
-log4j.category.org.hibernate.SQL=DEBUG
-# for debugging datasource initialization
-# log4j.category.test.jdbc=DEBUG

spring-data-mongodb-cross-store/src/test/resources/logback.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+
+	<appender name="console" class="ch.qos.logback.core.ConsoleAppender">
+		<encoder>
+			<pattern>%d %5p %40.40c:%4L - %m%n</pattern>
+		</encoder>
+	</appender>
+
+	<!-- 
+	<logger name="org.springframework" level="debug" />
+	 -->
+
+	<root level="error">
+		<appender-ref ref="console" />
+	</root>
+
+</configuration>

spring-data-mongodb-cross-store/template.mf

@@ -0,0 +1,18 @@
+Bundle-SymbolicName: org.springframework.data.mongodb.crossstore
+Bundle-Name: Spring Data MongoDB Cross Store Support
+Bundle-Vendor: Pivotal Software, Inc.
+Bundle-ManifestVersion: 2
+Import-Package:
+ sun.reflect;version="0";resolution:=optional
+Export-Template:
+ org.springframework.data.mongodb.crossstore.*;version="${project.version}"
+Import-Template:
+ com.mongodb.*;version="${mongo.osgi:[=.=.=,+1.0.0)}",
+ javax.persistence.*;version="${jpa:[=.=.=,+1.0.0)}",
+ org.aspectj.*;version="${aspectj:[1.0.0, 2.0.0)}",
+ org.bson.*;version="0",
+ org.slf4j.*;version="${slf4j:[=.=.=,+1.0.0)}",
+ org.springframework.*;version="${spring:[=.=.=.=,+1.0.0)}",
+ org.springframework.data.*;version="${springdata.commons:[=.=.=.=,+1.0.0)}",
+ org.springframework.data.mongodb.*;version="${project.version:[=.=.=.=,+1.0.0)}",
+ org.w3c.dom.*;version="0"

spring-data-mongodb-distribution/pom.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+	<modelVersion>4.0.0</modelVersion>
+	
+	<artifactId>spring-data-mongodb-distribution</artifactId>
+
+	<packaging>pom</packaging>
+
+	<name>Spring Data MongoDB - Distribution</name>
+	<description>Distribution build for Spring Data MongoDB</description>
+
+	<parent>
+		<groupId>org.springframework.data</groupId>
+		<artifactId>spring-data-mongodb-parent</artifactId>
+		<version>1.6.0.M1</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+	
+	<properties>
+		<project.root>${basedir}/..</project.root>
+		<dist.key>SDMONGO</dist.key>
+	</properties>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-assembly-plugin</artifactId>
+			</plugin>
+			<plugin>
+				<groupId>org.codehaus.mojo</groupId>
+				<artifactId>wagon-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

spring-data-mongodb-log4j/README.md

@@ -5,7 +5,7 @@ and connects directly to the MongoDB server using the driver. It has no dependen
 
 To use it, configure a host, port, (optionally) applicationId, and database property in your Log4J configuration:
 
-    log4j.appender.stdout=org.springframework.data.document.mongodb.log4j.MongoLog4jAppender
+    log4j.appender.stdout=org.springframework.data.mongodb.log4j.MongoLog4jAppender
     log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
     log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - <%m>%n
     log4j.appender.stdout.host = localhost
@@ -32,7 +32,7 @@ An example log entry might look like:
     {
       "_id" : ObjectId("4d89341a8ef397e06940d5cd"),
       "applicationId" : "my.application",
-      "name" : "org.springframework.data.document.mongodb.log4j.AppenderTest",
+      "name" : "org.springframework.data.mongodb.log4j.MongoLog4jAppenderIntegrationTests",
       "level" : "DEBUG",
       "timestamp" : ISODate("2011-03-23T16:53:46.778Z"),
       "properties" : {

spring-data-mongodb-log4j/pom.xml

@@ -1,83 +1,30 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <parent>
-    <groupId>org.springframework.data</groupId>
-    <artifactId>spring-data-mongodb-parent</artifactId>
-    <version>1.0.0.M5</version>
-    <relativePath>../spring-data-mongodb-parent/pom.xml</relativePath>
-  </parent>
-  <artifactId>spring-data-mongodb-log4j</artifactId>
-  <name>Spring Data MongoDB Log4J Appender</name>
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	
+	<parent>
+		<groupId>org.springframework.data</groupId>
+		<artifactId>spring-data-mongodb-parent</artifactId>
+		<version>1.6.0.M1</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
 
-  <properties>
-    <mongo.version>2.3</mongo.version>
-  </properties>
+	<artifactId>spring-data-mongodb-log4j</artifactId>
+	<name>Spring Data MongoDB - Log4J Appender</name>
 
-  <dependencies>
+	<properties>
+		<log4j>1.2.16</log4j>
+	</properties>
 
-    <!-- MongoDB -->
-    <dependency>
-      <groupId>org.mongodb</groupId>
-      <artifactId>mongo-java-driver</artifactId>
-      <version>${mongo.version}</version>
-    </dependency>
+	<dependencies>
 
-    <!-- Logging -->
-    <dependency>
-      <groupId>log4j</groupId>
-      <artifactId>log4j</artifactId>
-      <exclusions>
-        <exclusion>
-          <groupId>javax.mail</groupId>
-          <artifactId>mail</artifactId>
-        </exclusion>
-        <exclusion>
-          <groupId>javax.jms</groupId>
-          <artifactId>jms</artifactId>
-        </exclusion>
-        <exclusion>
-          <groupId>com.sun.jdmk</groupId>
-          <artifactId>jmxtools</artifactId>
-        </exclusion>
-        <exclusion>
-          <groupId>com.sun.jmx</groupId>
-          <artifactId>jmxri</artifactId>
-        </exclusion>
-      </exclusions>
-      <scope>compile</scope>
-    </dependency>
+		<!-- Logging -->
+		<dependency>
+			<groupId>log4j</groupId>
+			<artifactId>log4j</artifactId>
+			<version>${log4j}</version>
+		</dependency>
 
-    <!-- Test dependencies -->
-    <dependency>
-      <groupId>org.mockito</groupId>
-      <artifactId>mockito-all</artifactId>
-      <scope>test</scope>
-    </dependency>
-
-    <dependency>
-      <groupId>org.hamcrest</groupId>
-      <artifactId>hamcrest-all</artifactId>
-      <version>1.1</version>
-      <scope>test</scope>
-    </dependency>
-
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
-
-  </dependencies>
-
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>com.springsource.bundlor</groupId>
-        <artifactId>com.springsource.bundlor.maven</artifactId>
-      </plugin>
-    </plugins>
-  </build>
+	</dependencies>
 
 </project>

spring-data-mongodb-log4j/src/main/java/org/springframework/data/document/mongodb/log4j/MongoLog4jAppender.java

@@ -1,208 +0,0 @@
-/*
- * Copyright (c) 2011 by the original author(s).
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.data.document.mongodb.log4j;
-
-import java.net.UnknownHostException;
-import java.util.Arrays;
-import java.util.Calendar;
-import java.util.Map;
-
-import com.mongodb.BasicDBList;
-import com.mongodb.BasicDBObject;
-import com.mongodb.DB;
-import com.mongodb.Mongo;
-import com.mongodb.WriteConcern;
-import org.apache.log4j.AppenderSkeleton;
-import org.apache.log4j.Level;
-import org.apache.log4j.MDC;
-import org.apache.log4j.PatternLayout;
-import org.apache.log4j.spi.LoggingEvent;
-
-/**
- * @author Jon Brisbin <jbrisbin@vmware.com>
- */
-public class MongoLog4jAppender extends AppenderSkeleton {
-
-  public static final String LEVEL = "level";
-  public static final String NAME = "name";
-  public static final String APP_ID = "applicationId";
-  public static final String TIMESTAMP = "timestamp";
-  public static final String PROPERTIES = "properties";
-  public static final String TRACEBACK = "traceback";
-  public static final String MESSAGE = "message";
-  public static final String YEAR = "year";
-  public static final String MONTH = "month";
-  public static final String DAY = "day";
-  public static final String HOUR = "hour";
-
-  protected String host = "localhost";
-  protected int port = 27017;
-  protected String database = "logs";
-  protected String collectionPattern = "%c";
-  protected PatternLayout collectionLayout = new PatternLayout(collectionPattern);
-  protected String applicationId = System.getProperty("APPLICATION_ID", null);
-  protected WriteConcern warnOrHigherWriteConcern = WriteConcern.SAFE;
-  protected WriteConcern infoOrLowerWriteConcern = WriteConcern.NORMAL;
-  protected Mongo mongo;
-  protected DB db;
-
-  public MongoLog4jAppender() {
-  }
-
-  public MongoLog4jAppender(boolean isActive) {
-    super(isActive);
-  }
-
-  public String getHost() {
-    return host;
-  }
-
-  public void setHost(String host) {
-    this.host = host;
-  }
-
-  public int getPort() {
-    return port;
-  }
-
-  public void setPort(int port) {
-    this.port = port;
-  }
-
-  public String getDatabase() {
-    return database;
-  }
-
-  public void setDatabase(String database) {
-    this.database = database;
-  }
-
-  public String getCollectionPattern() {
-    return collectionPattern;
-  }
-
-  public void setCollectionPattern(String collectionPattern) {
-    this.collectionPattern = collectionPattern;
-    this.collectionLayout = new PatternLayout(collectionPattern);
-  }
-
-  public String getApplicationId() {
-    return applicationId;
-  }
-
-  public void setApplicationId(String applicationId) {
-    this.applicationId = applicationId;
-  }
-
-  public void setWarnOrHigherWriteConcern(String wc) {
-    this.warnOrHigherWriteConcern = WriteConcern.valueOf(wc);
-  }
-
-  public String getWarnOrHigherWriteConcern() {
-    return warnOrHigherWriteConcern.toString();
-  }
-
-  public String getInfoOrLowerWriteConcern() {
-    return infoOrLowerWriteConcern.toString();
-  }
-
-  public void setInfoOrLowerWriteConcern(String wc) {
-    this.infoOrLowerWriteConcern = WriteConcern.valueOf(wc);
-  }
-
-  protected void connectToMongo() throws UnknownHostException {
-    this.mongo = new Mongo(host, port);
-    this.db = mongo.getDB(database);
-  }
-
-  @SuppressWarnings({"unchecked"})
-  @Override
-  protected void append(final LoggingEvent event) {
-    if (null == db) {
-      try {
-        connectToMongo();
-      } catch (UnknownHostException e) {
-        throw new RuntimeException(e.getMessage(), e);
-      }
-    }
-
-    BasicDBObject dbo = new BasicDBObject();
-    if (null != applicationId) {
-      dbo.put(APP_ID, applicationId);
-      MDC.put(APP_ID, applicationId);
-    }
-    dbo.put(NAME, event.getLogger().getName());
-    dbo.put(LEVEL, event.getLevel().toString());
-    Calendar tstamp = Calendar.getInstance();
-    tstamp.setTimeInMillis(event.getTimeStamp());
-    dbo.put(TIMESTAMP, tstamp.getTime());
-
-    // Copy properties into document
-    Map<Object, Object> props = event.getProperties();
-    if (null != props && props.size() > 0) {
-      BasicDBObject propsDbo = new BasicDBObject();
-      for (Map.Entry<Object, Object> entry : props.entrySet()) {
-        propsDbo.put(entry.getKey().toString(), entry.getValue().toString());
-      }
-      dbo.put(PROPERTIES, propsDbo);
-    }
-
-    // Copy traceback info (if there is any) into the document
-    String[] traceback = event.getThrowableStrRep();
-    if (null != traceback && traceback.length > 0) {
-      BasicDBList tbDbo = new BasicDBList();
-      tbDbo.addAll(Arrays.asList(traceback));
-      dbo.put(TRACEBACK, tbDbo);
-    }
-
-    // Put the rendered message into the document
-    dbo.put(MESSAGE, event.getRenderedMessage());
-
-    // Insert the document
-    Calendar now = Calendar.getInstance();
-    MDC.put(YEAR, now.get(Calendar.YEAR));
-    MDC.put(MONTH, String.format("%1$02d", now.get(Calendar.MONTH) + 1));
-    MDC.put(DAY, String.format("%1$02d", now.get(Calendar.DAY_OF_MONTH)));
-    MDC.put(HOUR, String.format("%1$02d", now.get(Calendar.HOUR_OF_DAY)));
-
-    String coll = collectionLayout.format(event);
-
-    MDC.remove(YEAR);
-    MDC.remove(MONTH);
-    MDC.remove(DAY);
-    MDC.remove(HOUR);
-    if (null != applicationId) {
-      MDC.remove(APP_ID);
-    }
-
-    WriteConcern wc;
-    if (event.getLevel().isGreaterOrEqual(Level.WARN)) {
-      wc = warnOrHigherWriteConcern;
-    } else {
-      wc = infoOrLowerWriteConcern;
-    }
-    db.getCollection(coll).insert(dbo, wc);
-  }
-
-  public void close() {
-    mongo.close();
-  }
-
-  public boolean requiresLayout() {
-    return true;
-  }
-}

spring-data-mongodb-log4j/src/main/java/org/springframework/data/mongodb/log4j/MongoLog4jAppender.java

@@ -0,0 +1,226 @@
+/*
+ * Copyright 2011-2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.log4j;
+
+import java.net.UnknownHostException;
+import java.util.Arrays;
+import java.util.Calendar;
+import java.util.Map;
+
+import org.apache.log4j.AppenderSkeleton;
+import org.apache.log4j.Level;
+import org.apache.log4j.MDC;
+import org.apache.log4j.PatternLayout;
+import org.apache.log4j.spi.LoggingEvent;
+
+import com.mongodb.BasicDBList;
+import com.mongodb.BasicDBObject;
+import com.mongodb.DB;
+import com.mongodb.Mongo;
+import com.mongodb.WriteConcern;
+
+/**
+ * Log4j appender writing log entries into a MongoDB instance.
+ * 
+ * @author Jon Brisbin
+ * @author Oliver Gierke
+ */
+public class MongoLog4jAppender extends AppenderSkeleton {
+
+	public static final String LEVEL = "level";
+	public static final String NAME = "name";
+	public static final String APP_ID = "applicationId";
+	public static final String TIMESTAMP = "timestamp";
+	public static final String PROPERTIES = "properties";
+	public static final String TRACEBACK = "traceback";
+	public static final String MESSAGE = "message";
+	public static final String YEAR = "year";
+	public static final String MONTH = "month";
+	public static final String DAY = "day";
+	public static final String HOUR = "hour";
+
+	protected String host = "localhost";
+	protected int port = 27017;
+	protected String database = "logs";
+	protected String collectionPattern = "%c";
+	protected PatternLayout collectionLayout = new PatternLayout(collectionPattern);
+	protected String applicationId = System.getProperty("APPLICATION_ID", null);
+	protected WriteConcern warnOrHigherWriteConcern = WriteConcern.SAFE;
+	protected WriteConcern infoOrLowerWriteConcern = WriteConcern.NORMAL;
+	protected Mongo mongo;
+	protected DB db;
+
+	public MongoLog4jAppender() {
+	}
+
+	public MongoLog4jAppender(boolean isActive) {
+		super(isActive);
+	}
+
+	public String getHost() {
+		return host;
+	}
+
+	public void setHost(String host) {
+		this.host = host;
+	}
+
+	public int getPort() {
+		return port;
+	}
+
+	public void setPort(int port) {
+		this.port = port;
+	}
+
+	public String getDatabase() {
+		return database;
+	}
+
+	public void setDatabase(String database) {
+		this.database = database;
+	}
+
+	public String getCollectionPattern() {
+		return collectionPattern;
+	}
+
+	public void setCollectionPattern(String collectionPattern) {
+		this.collectionPattern = collectionPattern;
+		this.collectionLayout = new PatternLayout(collectionPattern);
+	}
+
+	public String getApplicationId() {
+		return applicationId;
+	}
+
+	public void setApplicationId(String applicationId) {
+		this.applicationId = applicationId;
+	}
+
+	public void setWarnOrHigherWriteConcern(String wc) {
+		this.warnOrHigherWriteConcern = WriteConcern.valueOf(wc);
+	}
+
+	public String getWarnOrHigherWriteConcern() {
+		return warnOrHigherWriteConcern.toString();
+	}
+
+	public String getInfoOrLowerWriteConcern() {
+		return infoOrLowerWriteConcern.toString();
+	}
+
+	public void setInfoOrLowerWriteConcern(String wc) {
+		this.infoOrLowerWriteConcern = WriteConcern.valueOf(wc);
+	}
+
+	protected void connectToMongo() throws UnknownHostException {
+		this.mongo = new Mongo(host, port);
+		this.db = mongo.getDB(database);
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.apache.log4j.AppenderSkeleton#append(org.apache.log4j.spi.LoggingEvent)
+	 */
+	@Override
+	@SuppressWarnings({ "unchecked" })
+	protected void append(final LoggingEvent event) {
+		if (null == db) {
+			try {
+				connectToMongo();
+			} catch (UnknownHostException e) {
+				throw new RuntimeException(e.getMessage(), e);
+			}
+		}
+
+		BasicDBObject dbo = new BasicDBObject();
+		if (null != applicationId) {
+			dbo.put(APP_ID, applicationId);
+			MDC.put(APP_ID, applicationId);
+		}
+		dbo.put(NAME, event.getLogger().getName());
+		dbo.put(LEVEL, event.getLevel().toString());
+		Calendar tstamp = Calendar.getInstance();
+		tstamp.setTimeInMillis(event.getTimeStamp());
+		dbo.put(TIMESTAMP, tstamp.getTime());
+
+		// Copy properties into document
+		Map<Object, Object> props = event.getProperties();
+		if (null != props && props.size() > 0) {
+			BasicDBObject propsDbo = new BasicDBObject();
+			for (Map.Entry<Object, Object> entry : props.entrySet()) {
+				propsDbo.put(entry.getKey().toString(), entry.getValue().toString());
+			}
+			dbo.put(PROPERTIES, propsDbo);
+		}
+
+		// Copy traceback info (if there is any) into the document
+		String[] traceback = event.getThrowableStrRep();
+		if (null != traceback && traceback.length > 0) {
+			BasicDBList tbDbo = new BasicDBList();
+			tbDbo.addAll(Arrays.asList(traceback));
+			dbo.put(TRACEBACK, tbDbo);
+		}
+
+		// Put the rendered message into the document
+		dbo.put(MESSAGE, event.getRenderedMessage());
+
+		// Insert the document
+		Calendar now = Calendar.getInstance();
+		MDC.put(YEAR, now.get(Calendar.YEAR));
+		MDC.put(MONTH, String.format("%1$02d", now.get(Calendar.MONTH) + 1));
+		MDC.put(DAY, String.format("%1$02d", now.get(Calendar.DAY_OF_MONTH)));
+		MDC.put(HOUR, String.format("%1$02d", now.get(Calendar.HOUR_OF_DAY)));
+
+		String coll = collectionLayout.format(event);
+
+		MDC.remove(YEAR);
+		MDC.remove(MONTH);
+		MDC.remove(DAY);
+		MDC.remove(HOUR);
+		if (null != applicationId) {
+			MDC.remove(APP_ID);
+		}
+
+		WriteConcern wc;
+		if (event.getLevel().isGreaterOrEqual(Level.WARN)) {
+			wc = warnOrHigherWriteConcern;
+		} else {
+			wc = infoOrLowerWriteConcern;
+		}
+		db.getCollection(coll).insert(dbo, wc);
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.apache.log4j.AppenderSkeleton#close()
+	 */
+	public void close() {
+
+		if (mongo != null) {
+			mongo.close();
+		}
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.apache.log4j.AppenderSkeleton#requiresLayout()
+	 */
+	public boolean requiresLayout() {
+		return true;
+	}
+}

spring-data-mongodb-log4j/src/main/java/org/springframework/data/mongodb/log4j/package-info.java

@@ -0,0 +1,5 @@
+/**
+ * Infrastructure for to use MongoDB as a logging sink.
+ */
+package org.springframework.data.mongodb.log4j;
+

spring-data-mongodb-log4j/src/test/java/org/springframework/data/document/mongodb/log4j/AppenderTest.java

@@ -1,75 +0,0 @@
-/*
- * Copyright (c) 2011 by the original author(s).
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.data.document.mongodb.log4j;
-
-import static org.hamcrest.Matchers.*;
-import static org.junit.Assert.*;
-
-import java.net.UnknownHostException;
-import java.util.Calendar;
-
-import com.mongodb.DB;
-import com.mongodb.DBCursor;
-import com.mongodb.Mongo;
-import org.apache.log4j.Logger;
-import org.apache.log4j.MDC;
-import org.junit.Before;
-import org.junit.Test;
-
-/**
- * @author Jon Brisbin <jbrisbin@vmware.com>
- */
-public class AppenderTest {
-
-  private static final String NAME = AppenderTest.class.getName();
-  private Logger log = Logger.getLogger(NAME);
-  private Mongo mongo;
-  private DB db;
-  private String collection;
-
-  @Before
-  public void setup() {
-    try {
-      mongo = new Mongo("localhost", 27017);
-      db = mongo.getDB("logs");
-      Calendar now = Calendar.getInstance();
-      collection = String.valueOf(now.get(Calendar.YEAR)) + String.format("%1$02d", now.get(Calendar.MONTH) + 1);
-      db.getCollection(collection).drop();
-    } catch (UnknownHostException e) {
-      throw new RuntimeException(e.getMessage(), e);
-    }
-  }
-
-  @Test
-  public void testLogging() {
-    log.debug("DEBUG message");
-    log.info("INFO message");
-    log.warn("WARN message");
-    log.error("ERROR message");
-
-    DBCursor msgs = db.getCollection(collection).find();
-    assertThat(msgs.count(), is(4));
-
-  }
-
-  @Test
-  public void testProperties() {
-    MDC.put("property", "one");
-    log.debug("DEBUG message");
-  }
-
-}

spring-data-mongodb-log4j/src/test/java/org/springframework/data/mongodb/log4j/MongoLog4jAppenderIntegrationTests.java

@@ -0,0 +1,77 @@
+/*
+ * Copyright 2011-2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.log4j;
+
+import static org.hamcrest.Matchers.*;
+import static org.junit.Assert.*;
+
+import java.util.Calendar;
+
+import org.apache.log4j.Logger;
+import org.apache.log4j.MDC;
+import org.junit.Before;
+import org.junit.Test;
+
+import com.mongodb.DB;
+import com.mongodb.DBCursor;
+import com.mongodb.Mongo;
+
+/**
+ * Integration tests for {@link MongoLog4jAppender}.
+ * 
+ * @author Jon Brisbin
+ * @author Oliver Gierke
+ */
+public class MongoLog4jAppenderIntegrationTests {
+
+	static final String NAME = MongoLog4jAppenderIntegrationTests.class.getName();
+
+	Logger log = Logger.getLogger(NAME);
+	Mongo mongo;
+	DB db;
+	String collection;
+
+	@Before
+	public void setUp() throws Exception {
+
+		mongo = new Mongo("localhost", 27017);
+		db = mongo.getDB("logs");
+
+		Calendar now = Calendar.getInstance();
+		collection = String.valueOf(now.get(Calendar.YEAR)) + String.format("%1$02d", now.get(Calendar.MONTH) + 1);
+		db.getCollection(collection).drop();
+	}
+
+	@Test
+	public void testLogging() {
+
+		log.debug("DEBUG message");
+		log.info("INFO message");
+		log.warn("WARN message");
+		log.error("ERROR message");
+
+		DBCursor msgs = db.getCollection(collection).find();
+
+		assertThat(msgs.count(), is(4));
+	}
+
+	@Test
+	public void testProperties() {
+
+		MDC.put("property", "one");
+		log.debug("DEBUG message");
+	}
+}

spring-data-mongodb-log4j/src/test/java/org/springframework/data/mongodb/log4j/MongoLog4jAppenderUnitTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2011 the original author or authors.
+ * Copyright 2013 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,21 +13,22 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.springframework.data.mongodb.core.convert;
+package org.springframework.data.mongodb.log4j;
 
-import org.springframework.data.convert.TypeMapper;
+import org.junit.Test;
 
 /**
- * Interfaces for components being able to provide a {@link TypeMapper}.
+ * Unit tests for {@link MongoLog4jAppender}.
  * 
  * @author Oliver Gierke
  */
-public interface TypeKeyAware {
+public class MongoLog4jAppenderUnitTests {
 
 	/**
-	 * Returns the {@link TypeMapper}.
-	 * 
-	 * @return the {@link TypeMapper} or {@literal null} if none available.
+	 * @see DATAMONGO-641
 	 */
-	boolean isTypeKey(String key);
+	@Test
+	public void closesWithoutMongoInstancePresent() {
+		new MongoLog4jAppender().close();
+	}
 }

spring-data-mongodb-log4j/src/test/resources/log4j.properties

@@ -1,6 +1,6 @@
 log4j.rootCategory=INFO, stdout
 
-log4j.appender.stdout=org.springframework.data.document.mongodb.log4j.MongoLog4jAppender
+log4j.appender.stdout=org.springframework.data.mongodb.log4j.MongoLog4jAppender
 log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
 log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - <%m>%n
 log4j.appender.stdout.host = localhost
@@ -10,11 +10,4 @@ log4j.appender.stdout.collectionPattern = %X{year}%X{month}
 log4j.appender.stdout.applicationId = my.application
 log4j.appender.stdout.warnOrHigherWriteConcern = FSYNC_SAFE
 
-log4j.category.org.apache.activemq=ERROR
-log4j.category.org.springframework.batch=DEBUG
-log4j.category.org.springframework.data.document.mongodb=DEBUG
-log4j.category.org.springframework.transaction=INFO
-
-log4j.category.org.hibernate.SQL=DEBUG
-# for debugging datasource initialization
-# log4j.category.test.jdbc=DEBUG
+log4j.category.org.springframework.data.mongodb=DEBUG

spring-data-mongodb-log4j/template.mf

@@ -1,10 +1,9 @@
 Bundle-SymbolicName: org.springframework.data.mongodb.log4j
 Bundle-Name: Spring Data Mongo DB Log4J Appender
-Bundle-Vendor: SpringSource
+Bundle-Vendor: Pivotal Software, Inc.
 Bundle-ManifestVersion: 2
 Import-Package:
  sun.reflect;version="0";resolution:=optional
 Import-Template:
- com.mongodb.*;version="${mongo.version:[=.=,+1.0.0)}",
- org.apache.log4j.*;version="[1.2.15, 2.0.0)",
- org.apache.log4j.spi.*;version="[1.2.15, 2.0.0)"
+ com.mongodb.*;version="${mongo.osgi:[=.=.=,+1.0.0)}",
+ org.apache.log4j.*;version="${log4j:[=.=.=,+1.0.0)}"

spring-data-mongodb-parent/pom.xml

@@ -1,415 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>org.springframework.data</groupId>
-  <artifactId>spring-data-mongodb-parent</artifactId>
-  <name>Spring Data MongoDB Parent</name>
-  <url>http://www.springsource.org/spring-data/mongodb</url>
-  <version>1.0.0.M5</version>
-  <packaging>pom</packaging>
-  <properties>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <!-- versions for commonly-used dependencies -->
-    <junit.version>4.8.1</junit.version>
-    <log4j.version>1.2.15</log4j.version>
-    <org.mockito.version>1.8.4</org.mockito.version>
-    <org.slf4j.version>1.5.10</org.slf4j.version>
-    <org.codehaus.jackson.version>1.6.1</org.codehaus.jackson.version>
-    <org.springframework.version>3.0.6.RELEASE</org.springframework.version>
-    <data.commons.version>1.2.0.M2</data.commons.version>
-    <aspectj.version>1.6.11.RELEASE</aspectj.version>
-  </properties>
-  <profiles>
-    <profile>
-      <id>strict</id>
-      <properties>
-        <maven.test.failure.ignore>false</maven.test.failure.ignore>
-      </properties>
-    </profile>
-    <profile>
-      <id>fast</id>
-      <properties>
-        <maven.test.skip>true</maven.test.skip>
-        <maven.javadoc.skip>true</maven.javadoc.skip>
-      </properties>
-    </profile>
-    <profile>
-      <id>staging</id>
-      <distributionManagement>
-        <site>
-          <id>spring-site-staging</id>
-          <url>file:///${java.io.tmpdir}/spring-data/mongodb/docs</url>
-        </site>
-        <repository>
-          <id>spring-milestone-staging</id>
-          <url>file:///${java.io.tmpdir}/spring-data/mongodb/milestone</url>
-        </repository>
-        <snapshotRepository>
-          <id>spring-snapshot-staging</id>
-          <url>file:///${java.io.tmpdir}/spring-data/mongodb/snapshot</url>
-        </snapshotRepository>
-      </distributionManagement>
-    </profile>
-    <profile>
-      <id>bootstrap</id>
-      <!-- TODO: move the repositories in here before release -->
-    </profile>
-  </profiles>
-  <distributionManagement>
-    <!-- see 'staging' profile for dry-run deployment settings -->
-    <downloadUrl>http://www.springsource.com/download/community
-    </downloadUrl>
-    <site>
-      <id>static.springframework.org</id>
-      <url>
-        scp://static.springframework.org/var/www/domains/springframework.org/static/htdocs/spring-data/mongodb/docs/${project.version}
-      </url>
-    </site>
-    <repository>
-      <id>spring-milestone</id>
-      <name>Spring Milestone Repository</name>
-      <url>s3://maven.springframework.org/milestone</url>
-    </repository>
-    <snapshotRepository>
-      <id>spring-snapshot</id>
-      <name>Spring Snapshot Repository</name>
-      <url>s3://maven.springframework.org/snapshot</url>
-    </snapshotRepository>
-  </distributionManagement>
-  <dependencyManagement>
-    <!--
-        inheritable <dependency> declarations for child poms. children still
-        must explicitly declare the groupId/artifactId of these dependencies
-        in order for them to show up on the classpath, but metadata like
-        <version> and <scope> are inherited, which cuts down on verbosity.
-        see
-        http://www.sonatype.com/books/mvnref-book/reference/pom-relationships-sect-dep-manage.html
-      -->
-    <dependencies>
-
-      <!--  Spring -->
-      <dependency>
-        <groupId>org.springframework</groupId>
-        <artifactId>spring-aop</artifactId>
-        <version>${org.springframework.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>org.springframework</groupId>
-        <artifactId>spring-beans</artifactId>
-        <version>${org.springframework.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>org.springframework</groupId>
-        <artifactId>spring-core</artifactId>
-        <version>${org.springframework.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>org.springframework</groupId>
-        <artifactId>spring-tx</artifactId>
-        <version>${org.springframework.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>org.springframework</groupId>
-        <artifactId>spring-orm</artifactId>
-        <version>${org.springframework.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>org.springframework</groupId>
-        <artifactId>spring-web</artifactId>
-        <version>${org.springframework.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>org.springframework</groupId>
-        <artifactId>spring-expression</artifactId>
-        <version>${org.springframework.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>org.springframework</groupId>
-        <artifactId>spring-test</artifactId>
-        <version>${org.springframework.version}</version>
-        <scope>test</scope>
-      </dependency>
-
-      <!--  Spring Data -->
-      <dependency>
-        <groupId>org.springframework.data</groupId>
-        <artifactId>spring-data-commons-core</artifactId>
-        <version>${data.commons.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>org.springframework.data</groupId>
-        <artifactId>spring-data-commons-aspects</artifactId>
-        <version>${data.commons.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>org.springframework.data</groupId>
-        <artifactId>spring-data-couchdb</artifactId>
-        <version>${project.version}</version>
-      </dependency>
-      <dependency>
-        <groupId>org.springframework.data</groupId>
-        <artifactId>spring-data-mongodb</artifactId>
-        <version>${project.version}</version>
-      </dependency>
-
-      <!-- Logging -->
-      <dependency>
-        <groupId>org.slf4j</groupId>
-        <artifactId>slf4j-api</artifactId>
-        <version>${org.slf4j.version}</version>
-        <scope>runtime</scope>
-      </dependency>
-      <dependency>
-        <groupId>org.slf4j</groupId>
-        <artifactId>jcl-over-slf4j</artifactId>
-        <version>${org.slf4j.version}</version>
-        <scope>runtime</scope>
-      </dependency>
-      <dependency>
-        <groupId>org.slf4j</groupId>
-        <artifactId>slf4j-log4j12</artifactId>
-        <version>${org.slf4j.version}</version>
-        <scope>runtime</scope>
-      </dependency>
-      <dependency>
-        <groupId>log4j</groupId>
-        <artifactId>log4j</artifactId>
-        <version>${log4j.version}</version>
-        <exclusions>
-          <exclusion>
-            <groupId>javax.mail</groupId>
-            <artifactId>mail</artifactId>
-          </exclusion>
-          <exclusion>
-            <groupId>javax.jms</groupId>
-            <artifactId>jms</artifactId>
-          </exclusion>
-          <exclusion>
-            <groupId>com.sun.jdmk</groupId>
-            <artifactId>jmxtools</artifactId>
-          </exclusion>
-          <exclusion>
-            <groupId>com.sun.jmx</groupId>
-            <artifactId>jmxri</artifactId>
-          </exclusion>
-        </exclusions>
-        <scope>runtime</scope>
-      </dependency>
-
-      <dependency>
-        <groupId>javax.annotation</groupId>
-        <artifactId>jsr250-api</artifactId>
-        <version>1.0</version>
-        <optional>true</optional>
-      </dependency>
-
-      <dependency>
-        <groupId>org.mockito</groupId>
-        <artifactId>mockito-all</artifactId>
-        <version>${org.mockito.version}</version>
-        <scope>test</scope>
-      </dependency>
-
-      <dependency>
-        <groupId>junit</groupId>
-        <artifactId>junit</artifactId>
-        <version>${junit.version}</version>
-        <scope>test</scope>
-      </dependency>
-
-    </dependencies>
-  </dependencyManagement>
-  <dependencies>
-    <!--
-        dependency definitions to be inherited by child poms. any
-        <dependency> declarations here will automatically show up on child
-        project classpaths. only items that are truly common across all
-        projects (modules and samples) should go here. otherwise, consider
-        <dependencyManagement> above
-      -->
-    <dependency>
-      <groupId>log4j</groupId>
-      <artifactId>log4j</artifactId>
-      <version>${log4j.version}</version>
-      <scope>test</scope>
-    </dependency>
-  </dependencies>
-
-  <build>
-    <extensions>
-      <extension>
-        <!--
-              available only in the springframework maven repository. see
-              <repositories> section below
-            -->
-        <groupId>org.springframework.build.aws</groupId>
-        <artifactId>org.springframework.build.aws.maven</artifactId>
-        <version>3.1.0.RELEASE</version>
-      </extension>
-    </extensions>
-    <resources>
-      <resource>
-        <directory>${project.basedir}/src/main/java</directory>
-        <includes>
-          <include>**/*</include>
-        </includes>
-        <excludes>
-          <exclude>**/*.java</exclude>
-        </excludes>
-      </resource>
-      <resource>
-        <directory>${project.basedir}/src/main/resources</directory>
-        <includes>
-          <include>**/*</include>
-        </includes>
-      </resource>
-    </resources>
-    <testResources>
-      <testResource>
-        <directory>${project.basedir}/src/test/java</directory>
-        <includes>
-          <include>**/*</include>
-        </includes>
-        <excludes>
-          <exclude>**/*.java</exclude>
-        </excludes>
-      </testResource>
-      <testResource>
-        <directory>${project.basedir}/src/test/resources</directory>
-        <includes>
-          <include>**/*</include>
-        </includes>
-        <excludes>
-          <exclude>**/*.java</exclude>
-        </excludes>
-      </testResource>
-    </testResources>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-compiler-plugin</artifactId>
-        <configuration>
-          <source>1.5</source>
-          <target>1.5</target>
-          <compilerArgument>-Xlint:-path</compilerArgument>
-          <showWarnings>true</showWarnings>
-          <showDeprecation>false</showDeprecation>
-        </configuration>
-      </plugin>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-jar-plugin</artifactId>
-        <version>2.3.1</version>
-        <configuration>
-           <useDefaultManifestFile>true</useDefaultManifestFile>
-        </configuration>
-      </plugin>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-surefire-plugin</artifactId>
-        <configuration>
-          <useFile>false</useFile>
-          <includes>
-            <include>**/*Tests.java</include>
-          </includes>
-          <excludes>
-            <exclude>**/Abstract*.java</exclude>
-          </excludes>
-          <junitArtifactName>junit:junit</junitArtifactName>
-        </configuration>
-      </plugin>
-      <plugin>
-        <artifactId>maven-source-plugin</artifactId>
-        <executions>
-          <execution>
-            <id>attach-sources</id>
-            <goals>
-              <goal>jar</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
-    </plugins>
-    <pluginManagement>
-      <plugins>
-        <plugin>
-          <!--
-                 configures the springsource bundlor plugin, which generates
-                 OSGI-compatible MANIFEST.MF files during the 'compile' phase of
-                 the maven build. this plugin is declared within the
-                 pluginManagement section because not every module that inherits
-                 from this pom needs bundlor's services, e.g.:
-                 spring-integration-samples and all its children. for this reason,
-                 all modules that wish to use bundlor must declare it explicitly.
-                 it is not necessary to specify the <version> or <configuration>
-                 sections, but groupId and artifactId are required. see
-                 http://static.springsource.org/s2-bundlor/1.0.x/user-guide/html/ch04s03.html
-                 for more info
-               -->
-          <groupId>com.springsource.bundlor</groupId>
-          <artifactId>com.springsource.bundlor.maven</artifactId>
-          <version>1.0.0.RELEASE</version>
-          <configuration>
-            <failOnWarnings>true</failOnWarnings>
-          </configuration>
-          <executions>
-            <execution>
-              <id>bundlor</id>
-              <goals>
-                <goal>bundlor</goal>
-              </goals>
-            </execution>
-          </executions>
-        </plugin>
-      </plugins>
-    </pluginManagement>
-  </build>
-  <pluginRepositories>
-    <pluginRepository>
-      <!-- necessary for bundlor and utils -->
-      <id>repository.plugin.springsource.release</id>
-      <name>SpringSource Maven Repository</name>
-      <url>http://repository.springsource.com/maven/bundles/release</url>
-    </pluginRepository>
-    <pluginRepository>
-      <id>repository.springframework.maven.release</id>
-      <name>Spring Framework Maven Release Repository</name>
-      <url>http://maven.springframework.org/release</url>
-    </pluginRepository>
-  </pluginRepositories>
-  <repositories>
-    <repository>
-      <id>repository.springframework.maven.release</id>
-      <name>Spring Framework Maven Release Repository</name>
-      <url>http://maven.springframework.org/release</url>
-    </repository>
-    <repository>
-      <id>repository.springframework.maven.milestone</id>
-      <name>Spring Framework Maven Milestone Repository</name>
-      <url>http://maven.springframework.org/milestone</url>
-    </repository>
-    <repository>
-      <id>repository.springframework.maven.snapshot</id>
-      <name>Spring Framework Maven Snapshot Repository</name>
-      <url>http://maven.springframework.org/snapshot</url>
-    </repository>
-  </repositories>
-  <reporting>
-    <plugins>
-      <plugin>
-        <!--
-              significantly speeds up the 'Dependencies' report during site
-              creation see
-              http://old.nabble.com/Skipping-dependency-report-during-Maven2-site-generation-td20116761.html
-            -->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-project-info-reports-plugin</artifactId>
-        <version>2.1</version>
-        <configuration>
-          <dependencyLocationsEnabled>false</dependencyLocationsEnabled>
-        </configuration>
-      </plugin>
-    </plugins>
-  </reporting>
-</project>

spring-data-mongodb/Spring Data MongoDB.sonargraph

@@ -1,140 +1,182 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<context version="7.0.3.1152">
-    <scope name="spring-data-mongodb" type="Project">
-        <element name="Filter" type="TypeFilterReferenceOverridden">
-            <element name="org.springframework.data.mongodb.**" type="IncludeTypePattern"/>
+<context version="7.1.9.205">
+    <scope type="Project" name="spring-data-mongodb">
+        <element type="TypeFilterReferenceOverridden" name="Filter">
+            <element type="IncludeTypePattern" name="org.springframework.data.mongodb.**"/>
         </element>
         <architecture>
-            <element name="Config" type="Layer">
-                <element name="Assignment" type="TypeFilter">
-                    <element name="**.config.**" type="WeakTypePattern"/>
+            <element type="Layer" name="Repositories">
+                <element type="TypeFilter" name="Assignment">
+                    <element type="IncludeTypePattern" name="**.repository.**"/>
                 </element>
-                <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Core"/>
-                <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Monitoring"/>
-                <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Repositories"/>
+                <element type="Subsystem" name="API">
+                    <element type="TypeFilter" name="Assignment">
+                        <element type="IncludeTypePattern" name="**.repository.*"/>
+                    </element>
+                </element>
+                <element type="Subsystem" name="Query">
+                    <element type="TypeFilter" name="Assignment">
+                        <element type="IncludeTypePattern" name="**.query.**"/>
+                    </element>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Repositories::Subsystem|API" type="AllowedDependency"/>
+                </element>
+                <element type="Subsystem" name="Implementation">
+                    <element type="TypeFilter" name="Assignment">
+                        <element type="IncludeTypePattern" name="**.support.**"/>
+                    </element>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Repositories::Subsystem|API" type="AllowedDependency"/>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Repositories::Subsystem|Query" type="AllowedDependency"/>
+                </element>
+                <element type="Subsystem" name="Config">
+                    <element type="TypeFilter" name="Assignment">
+                        <element type="IncludeTypePattern" name="**.config.**"/>
+                    </element>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Mapping" type="AllowedDependency"/>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Repositories::Subsystem|Implementation" type="AllowedDependency"/>
+                </element>
+                <dependency toName="Project|spring-data-mongodb::Layer|Config" type="AllowedDependency"/>
+                <dependency toName="Project|spring-data-mongodb::Layer|Core" type="AllowedDependency"/>
             </element>
-            <element name="Repositories" type="Layer">
-                <element name="Assignment" type="TypeFilter">
-                    <element name="**.repository.**" type="IncludeTypePattern"/>
+            <element type="Layer" name="Config">
+                <element type="TypeFilter" name="Assignment">
+                    <element type="WeakTypePattern" name="**.config.**"/>
                 </element>
-                <element name="API" type="Subsystem">
-                    <element name="Assignment" type="TypeFilter">
-                        <element name="**.repository.*" type="IncludeTypePattern"/>
-                    </element>
-                </element>
-                <element name="Query" type="Subsystem">
-                    <element name="Assignment" type="TypeFilter">
-                        <element name="**.query.**" type="IncludeTypePattern"/>
-                    </element>
-                    <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Repositories::Subsystem|API"/>
-                </element>
-                <element name="Implementation" type="Subsystem">
-                    <element name="Assignment" type="TypeFilter">
-                        <element name="**.support.**" type="IncludeTypePattern"/>
-                    </element>
-                    <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Repositories::Subsystem|API"/>
-                    <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Repositories::Subsystem|Query"/>
-                </element>
-                <element name="Config" type="Subsystem">
-                    <element name="Assignment" type="TypeFilter">
-                        <element name="**.config.**" type="IncludeTypePattern"/>
-                    </element>
-                    <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Repositories::Subsystem|Implementation"/>
-                </element>
-                <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Core"/>
+                <dependency toName="Project|spring-data-mongodb::Layer|Core" type="AllowedDependency"/>
+                <dependency toName="Project|spring-data-mongodb::Layer|GridFS" type="AllowedDependency"/>
+                <dependency toName="Project|spring-data-mongodb::Layer|Monitoring" type="AllowedDependency"/>
             </element>
-            <element name="Monitoring" type="Layer">
-                <element name="Assignment" type="TypeFilter">
-                    <element name="**.monitor.**" type="IncludeTypePattern"/>
+            <element type="Layer" name="Monitoring">
+                <element type="TypeFilter" name="Assignment">
+                    <element type="IncludeTypePattern" name="**.monitor.**"/>
                 </element>
-                <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Core"/>
+                <dependency toName="Project|spring-data-mongodb::Layer|Core" type="AllowedDependency"/>
             </element>
-            <element name="Core" type="Layer">
-                <element name="Assignment" type="TypeFilter">
-                    <element name="**.core.**" type="IncludeTypePattern"/>
+            <element type="Layer" name="GridFS">
+                <element type="TypeFilter" name="Assignment">
+                    <element type="IncludeTypePattern" name="**.gridfs.**"/>
                 </element>
-                <element name="Mapping" type="Subsystem">
-                    <element name="Assignment" type="TypeFilter">
-                        <element name="**.mapping.**" type="IncludeTypePattern"/>
+                <dependency toName="Project|spring-data-mongodb::Layer|Core" type="AllowedDependency"/>
+            </element>
+            <element type="Layer" name="Core">
+                <element type="TypeFilter" name="Assignment"/>
+                <element type="Subsystem" name="Mapping">
+                    <element type="TypeFilter" name="Assignment">
+                        <element type="IncludeTypePattern" name="**.core.mapping.**"/>
                     </element>
                 </element>
-                <element name="Geospatial" type="Subsystem">
-                    <element name="Assignment" type="TypeFilter">
-                        <element name="**.geo.**" type="IncludeTypePattern"/>
+                <element type="Subsystem" name="Geospatial">
+                    <element type="TypeFilter" name="Assignment">
+                        <element type="IncludeTypePattern" name="**.core.geo.**"/>
                     </element>
-                    <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Mapping"/>
                 </element>
-                <element name="Query" type="Subsystem">
-                    <element name="Assignment" type="TypeFilter">
-                        <element name="**.query.**" type="IncludeTypePattern"/>
+                <element type="Subsystem" name="Query">
+                    <element type="TypeFilter" name="Assignment">
+                        <element type="IncludeTypePattern" name="**.core.query.**"/>
                     </element>
-                    <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Geospatial"/>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Geospatial" type="AllowedDependency"/>
                 </element>
-                <element name="Index" type="Subsystem">
-                    <element name="Assignment" type="TypeFilter">
-                        <element name="**.index.**" type="IncludeTypePattern"/>
+                <element type="Subsystem" name="Conversion">
+                    <element type="TypeFilter" name="Assignment">
+                        <element type="IncludeTypePattern" name="**.core.convert.**"/>
                     </element>
-                    <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Mapping"/>
-                    <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Query"/>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Geospatial" type="AllowedDependency"/>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Mapping" type="AllowedDependency"/>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Query" type="AllowedDependency"/>
                 </element>
-                <element name="Core" type="Subsystem">
-                    <element name="Assignment" type="TypeFilter">
-                        <element name="**.core.**" type="WeakTypePattern"/>
+                <element type="Subsystem" name="SpEL">
+                    <element type="TypeFilter" name="Assignment">
+                        <element type="IncludeTypePattern" name="**.core.spel.**"/>
                     </element>
-                    <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Geospatial"/>
-                    <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Index"/>
-                    <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Mapping"/>
-                    <dependency type="AllowedDependency" toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Query"/>
                 </element>
+                <element type="Subsystem" name="Aggregation">
+                    <element type="TypeFilter" name="Assignment">
+                        <element type="IncludeTypePattern" name="**.core.aggregation.**"/>
+                    </element>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Conversion" type="AllowedDependency"/>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Mapping" type="AllowedDependency"/>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Query" type="AllowedDependency"/>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|SpEL" type="AllowedDependency"/>
+                </element>
+                <element type="Subsystem" name="Index">
+                    <element type="TypeFilter" name="Assignment">
+                        <element type="IncludeTypePattern" name="**.core.index.**"/>
+                    </element>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Mapping" type="AllowedDependency"/>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Query" type="AllowedDependency"/>
+                </element>
+                <element type="Subsystem" name="Core">
+                    <element type="TypeFilter" name="Assignment">
+                        <element type="WeakTypePattern" name="**.core.**"/>
+                    </element>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Aggregation" type="AllowedDependency"/>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Conversion" type="AllowedDependency"/>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Geospatial" type="AllowedDependency"/>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Index" type="AllowedDependency"/>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Mapping" type="AllowedDependency"/>
+                    <dependency toName="Project|spring-data-mongodb::Layer|Core::Subsystem|Query" type="AllowedDependency"/>
+                </element>
+                <element type="Subsystem" name="Util">
+                    <element type="TypeFilter" name="Assignment">
+                        <element type="IncludeTypePattern" name="**.util.**"/>
+                    </element>
+                    <stereotype name="Unrestricted"/>
+                    <stereotype name="Public"/>
+                </element>
+            </element>
+            <element type="Subsystem" name="API">
+                <element type="TypeFilter" name="Assignment">
+                    <element type="IncludeTypePattern" name="org.springframework.data.mongodb.*"/>
+                </element>
+                <stereotype name="Public"/>
             </element>
         </architecture>
         <workspace>
-            <element name="src/main/java" type="JavaRootDirectory">
+            <element type="JavaRootDirectory" name="src/main/java">
                 <reference name="Project|spring-data-mongodb::BuildUnit|spring-data-mongodb"/>
             </element>
-            <element name="target/classes" type="JavaRootDirectory">
+            <element type="JavaRootDirectory" name="target/classes">
                 <reference name="Project|spring-data-mongodb::BuildUnit|spring-data-mongodb"/>
             </element>
         </workspace>
         <physical>
-            <element name="spring-data-mongodb" type="BuildUnit"/>
+            <element type="BuildUnit" name="spring-data-mongodb"/>
         </physical>
     </scope>
-    <scope name="External" type="External">
-        <element name="Filter" type="TypeFilter">
-            <element name="**" type="IncludeTypePattern"/>
-            <element name="java.**" type="ExcludeTypePattern"/>
-            <element name="javax.**" type="ExcludeTypePattern"/>
+    <scope type="External" name="External">
+        <element type="TypeFilter" name="Filter">
+            <element type="IncludeTypePattern" name="**"/>
+            <element type="ExcludeTypePattern" name="java.**"/>
+            <element type="ExcludeTypePattern" name="javax.**"/>
         </element>
         <architecture>
-            <element name="Spring" type="Subsystem">
-                <element name="Assignment" type="TypeFilter">
-                    <element name="org.springframework.**" type="IncludeTypePattern"/>
-                    <element name="org.springframework.data.**" type="ExcludeTypePattern"/>
+            <element type="Subsystem" name="Spring">
+                <element type="TypeFilter" name="Assignment">
+                    <element type="IncludeTypePattern" name="org.springframework.**"/>
+                    <element type="ExcludeTypePattern" name="org.springframework.data.**"/>
                 </element>
             </element>
-            <element name="Spring Data Core" type="Subsystem">
-                <element name="Assignment" type="TypeFilter">
-                    <element name="org.springframework.data.**" type="IncludeTypePattern"/>
+            <element type="Subsystem" name="Spring Data Core">
+                <element type="TypeFilter" name="Assignment">
+                    <element type="IncludeTypePattern" name="org.springframework.data.**"/>
                 </element>
             </element>
-            <element name="Mongo Java Driver" type="Subsystem">
-                <element name="Assignment" type="TypeFilter">
-                    <element name="com.mongodb.**" type="IncludeTypePattern"/>
-                    <element name="org.bson.**" type="IncludeTypePattern"/>
+            <element type="Subsystem" name="Mongo Java Driver">
+                <element type="TypeFilter" name="Assignment">
+                    <element type="IncludeTypePattern" name="com.mongodb.**"/>
+                    <element type="IncludeTypePattern" name="org.bson.**"/>
                 </element>
             </element>
-            <element name="Querydsl" type="Subsystem">
-                <element name="Assignment" type="TypeFilter">
-                    <element name="com.mysema.query.**" type="IncludeTypePattern"/>
+            <element type="Subsystem" name="Querydsl">
+                <element type="TypeFilter" name="Assignment">
+                    <element type="IncludeTypePattern" name="com.mysema.query.**"/>
                 </element>
             </element>
         </architecture>
     </scope>
-    <scope name="Global" type="Global">
-        <element name="Configuration" type="Configuration"/>
-        <element name="Filter" type="TypeFilter">
-            <element name="**" type="IncludeTypePattern"/>
+    <scope type="Global" name="Global">
+        <element type="Configuration" name="Configuration"/>
+        <element type="TypeFilter" name="Filter">
+            <element type="IncludeTypePattern" name="**"/>
         </element>
     </scope>
 </context>

spring-data-mongodb/pom.xml

@@ -1,144 +1,165 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-				 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-				 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
 	<modelVersion>4.0.0</modelVersion>
+	
+	<artifactId>spring-data-mongodb</artifactId>
+
+	<name>Spring Data MongoDB - Core</name>
+	<description>MongoDB support for Spring Data</description>
+
 	<parent>
 		<groupId>org.springframework.data</groupId>
 		<artifactId>spring-data-mongodb-parent</artifactId>
-		<version>1.0.0.M5</version>
-		<relativePath>../spring-data-mongodb-parent/pom.xml</relativePath>
+		<version>1.6.0.M1</version>
+		<relativePath>../pom.xml</relativePath>
 	</parent>
-	<artifactId>spring-data-mongodb</artifactId>
-	<name>Spring Data MongoDB</name>
 
 	<properties>
-		<mongo.version>2.6.5</mongo.version>
-		<querydsl.version>2.2.4</querydsl.version>
+		<validation>1.0.0.GA</validation>
+		<objenesis>1.3</objenesis>
 	</properties>
 
 	<dependencies>
-
+		
 		<!--  Spring -->
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-tx</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-context</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework</groupId>
 			<artifactId>spring-beans</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework</groupId>
-			<artifactId>spring-expression</artifactId>
+			<artifactId>spring-core</artifactId>
+			<exclusions>
+				<exclusion>
+					<groupId>commons-logging</groupId>
+					<artifactId>commons-logging</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework</groupId>
-			<artifactId>spring-test</artifactId>
-			<scope>test</scope>
+			<artifactId>spring-expression</artifactId>
 		</dependency>
 
 		<!--  Spring Data -->
 		<dependency>
-			<groupId>org.springframework.data</groupId>
-			<artifactId>spring-data-commons-core</artifactId>
-			<version>${data.commons.version}</version>
-		</dependency>
-
-		<!-- MongoDB -->
-		<dependency>
-			<groupId>org.mongodb</groupId>
-			<artifactId>mongo-java-driver</artifactId>
-			<version>${mongo.version}</version>
-			<exclusions>
-				<exclusion>
-					<groupId>javax.persistence</groupId>
-					<artifactId>persistence-api</artifactId>
-				</exclusion>
-			</exclusions>
+			<groupId>${project.groupId}</groupId>
+			<artifactId>spring-data-commons</artifactId>
+			<version>${springdata.commons}</version>
 		</dependency>
 
 		<dependency>
 			<groupId>com.mysema.querydsl</groupId>
 			<artifactId>querydsl-mongodb</artifactId>
-			<version>${querydsl.version}</version>
+			<version>${querydsl}</version>
 			<optional>true</optional>
-			<exclusions>
-				<exclusion>
-					<groupId>com.google.code.morphia</groupId>
-					<artifactId>morphia</artifactId>
-				</exclusion>
-			</exclusions>
 		</dependency>
 
 		<dependency>
 			<groupId>com.mysema.querydsl</groupId>
 			<artifactId>querydsl-apt</artifactId>
-			<version>${querydsl.version}</version>
+			<version>${querydsl}</version>
 			<scope>provided</scope>
 		</dependency>
 
 		<dependency>
 			<groupId>javax.annotation</groupId>
 			<artifactId>jsr250-api</artifactId>
+			<version>1.0</version>
+			<optional>true</optional>
+		</dependency>
+		
+		<!-- CDI -->
+		<dependency>
+			<groupId>javax.enterprise</groupId>
+			<artifactId>cdi-api</artifactId>
+			<version>${cdi}</version>
+			<scope>provided</scope>
+			<optional>true</optional>
+		</dependency>
+		
+		<dependency>
+			<groupId>javax.el</groupId>
+			<artifactId>el-api</artifactId>
+			<version>${cdi}</version>
+			<scope>test</scope>
+		</dependency>
+		
+		<dependency>
+			<groupId>org.apache.openwebbeans.test</groupId>
+			<artifactId>cditest-owb</artifactId>
+			<version>${webbeans}</version>
+			<scope>test</scope>
+		</dependency>
+		
+		<dependency>
+			<groupId>javax.servlet</groupId>
+			<artifactId>servlet-api</artifactId>
+			<version>2.5</version>
+			<scope>test</scope>
+		</dependency>
+
+		<!-- JSR 303 Validation -->
+		<dependency>
+			<groupId>javax.validation</groupId>
+			<artifactId>validation-api</artifactId>
+			<version>${validation}</version>
+			<optional>true</optional>
+		</dependency>
+		
+		<dependency>
+			<groupId>org.objenesis</groupId>
+			<artifactId>objenesis</artifactId>
+			<version>${objenesis}</version>
 			<optional>true</optional>
 		</dependency>
 
-		<!-- Test dependencies -->
 		<dependency>
-			<groupId>org.mockito</groupId>
-			<artifactId>mockito-all</artifactId>
+			<groupId>org.hibernate</groupId>
+			<artifactId>hibernate-validator</artifactId>
+			<version>4.2.0.Final</version>
 			<scope>test</scope>
 		</dependency>
-
-		<dependency>
-			<groupId>org.hamcrest</groupId>
-			<artifactId>hamcrest-all</artifactId>
-			<version>1.1</version>
-			<scope>test</scope>
-		</dependency>
-
-		<dependency>
-			<groupId>junit</groupId>
-			<artifactId>junit</artifactId>
-			<scope>test</scope>
-		</dependency>
-
+		
 		<dependency>
 			<groupId>joda-time</groupId>
 			<artifactId>joda-time</artifactId>
-			<version>1.6</version>
+			<version>${jodatime}</version>
 			<scope>test</scope>
 		</dependency>
-
+		
 		<dependency>
 			<groupId>org.slf4j</groupId>
-			<artifactId>slf4j-api</artifactId>
+			<artifactId>jul-to-slf4j</artifactId>
+			<version>${slf4j}</version>
 			<scope>test</scope>
 		</dependency>
-		<dependency>
-			<groupId>org.slf4j</groupId>
-			<artifactId>jcl-over-slf4j</artifactId>
-			<scope>test</scope>
-		</dependency>
-		<dependency>
-			<groupId>org.slf4j</groupId>
-			<artifactId>slf4j-log4j12</artifactId>
-			<scope>test</scope>
-		</dependency>
-		<dependency>
-			<groupId>log4j</groupId>
-			<artifactId>log4j</artifactId>
-			<scope>test</scope>
-		</dependency>
-
+		
 	</dependencies>
+	
 	<build>
 		<plugins>
-			<plugin>
-				<groupId>com.springsource.bundlor</groupId>
-				<artifactId>com.springsource.bundlor.maven</artifactId>
-			</plugin>
 
 			<plugin>
 				<groupId>com.mysema.maven</groupId>
-				<artifactId>maven-apt-plugin</artifactId>
-				<version>1.0.2</version>
+				<artifactId>apt-maven-plugin</artifactId>
+				<version>${apt}</version>
+				<dependencies>
+					<dependency>
+						<groupId>com.mysema.querydsl</groupId>
+						<artifactId>querydsl-apt</artifactId>
+						<version>${querydsl}</version>
+					</dependency>
+				</dependencies>
 				<executions>
 					<execution>
 						<phase>generate-test-sources</phase>
@@ -152,17 +173,25 @@
 					</execution>
 				</executions>
 			</plugin>
+
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-surefire-plugin</artifactId>
+				<version>2.12</version>
+				<configuration>
+					<useFile>false</useFile>
+					<includes>
+						<include>**/*Tests.java</include>
+					</includes>
+					<excludes>
+						<exclude>**/PerformanceTests.java</exclude>
+					</excludes>
+					<systemPropertyVariables>
+						<java.util.logging.config.file>src/test/resources/logging.properties</java.util.logging.config.file>
+					</systemPropertyVariables>
+				</configuration>
+			</plugin>
 		</plugins>
 	</build>
 
-	<repositories>
-		<repository>
-			<id>querydsl</id>
-			<name>Mysema QueryDsl</name>
-			<url>http://source.mysema.com/maven2/releases</url>
-			<snapshots>
-				<enabled>false</enabled>
-			</snapshots>
-		</repository>
-	</repositories>
 </project>

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/CannotGetMongoDbConnectionException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2011 the original author or authors.
+ * Copyright 2010-2012 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,42 +16,51 @@
 package org.springframework.data.mongodb;
 
 import org.springframework.dao.DataAccessResourceFailureException;
+import org.springframework.data.authentication.UserCredentials;
 
+/**
+ * Exception being thrown in case we cannot connect to a MongoDB instance.
+ * 
+ * @author Oliver Gierke
+ */
 public class CannotGetMongoDbConnectionException extends DataAccessResourceFailureException {
 
-	private String username;
-
-	private char[] password;
-
-	private String database;
+	private final UserCredentials credentials;
+	private final String database;
 
 	private static final long serialVersionUID = 1172099106475265589L;
 
 	public CannotGetMongoDbConnectionException(String msg, Throwable cause) {
 		super(msg, cause);
+		this.database = null;
+		this.credentials = UserCredentials.NO_CREDENTIALS;
 	}
 
 	public CannotGetMongoDbConnectionException(String msg) {
-		super(msg);
+		this(msg, null, UserCredentials.NO_CREDENTIALS);
 	}
 
-	public CannotGetMongoDbConnectionException(String msg, String database, String username, char[] password) {
+	public CannotGetMongoDbConnectionException(String msg, String database, UserCredentials credentials) {
 		super(msg);
-		this.username = username;
-		this.password = password == null ? null : password.clone();
 		this.database = database;
+		this.credentials = credentials;
 	}
 
-	public String getUsername() {
-		return username;
-	}
-
-	public char[] getPassword() {
-		return password;
+	/**
+	 * Returns the {@link UserCredentials} that were used when trying to connect to the MongoDB instance.
+	 * 
+	 * @return
+	 */
+	public UserCredentials getCredentials() {
+		return this.credentials;
 	}
 
+	/**
+	 * Returns the name of the database trying to be accessed.
+	 * 
+	 * @return
+	 */
 	public String getDatabase() {
 		return database;
 	}
-
 }

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/LazyLoadingException.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb;
+
+import org.springframework.dao.UncategorizedDataAccessException;
+
+/**
+ * @author Oliver Gierke
+ */
+public class LazyLoadingException extends UncategorizedDataAccessException {
+
+	private static final long serialVersionUID = -7089224903873220037L;
+
+	/**
+	 * @param msg
+	 * @param cause
+	 */
+	public LazyLoadingException(String msg, Throwable cause) {
+		super(msg, cause);
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/MongoDbFactory.java

@@ -1,6 +1,23 @@
+/*
+ * Copyright 2011-2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.springframework.data.mongodb;
 
 import org.springframework.dao.DataAccessException;
+import org.springframework.dao.support.PersistenceExceptionTranslator;
+import org.springframework.data.mongodb.core.MongoExceptionTranslator;
 
 import com.mongodb.DB;
 
@@ -8,6 +25,7 @@ import com.mongodb.DB;
  * Interface for factories creating {@link DB} instances.
  * 
  * @author Mark Pollack
+ * @author Thomas Darimont
  */
 public interface MongoDbFactory {
 
@@ -27,4 +45,11 @@ public interface MongoDbFactory {
 	 * @throws DataAccessException
 	 */
 	DB getDb(String dbName) throws DataAccessException;
+
+	/**
+	 * Exposes a shared {@link MongoExceptionTranslator}.
+	 * 
+	 * @return will never be {@literal null}.
+	 */
+	PersistenceExceptionTranslator getExceptionTranslator();
 }

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/AbstractMongoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2011 the original author or authors.
+ * Copyright 2011-2014 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,88 +15,232 @@
  */
 package org.springframework.data.mongodb.config;
 
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.Set;
 
-import com.mongodb.Mongo;
 import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.core.convert.converter.Converter;
 import org.springframework.core.type.filter.AnnotationTypeFilter;
 import org.springframework.data.annotation.Persistent;
 import org.springframework.data.authentication.UserCredentials;
+import org.springframework.data.mapping.context.MappingContextIsNewStrategyFactory;
+import org.springframework.data.mapping.model.CamelCaseAbbreviatingFieldNamingStrategy;
+import org.springframework.data.mapping.model.FieldNamingStrategy;
+import org.springframework.data.mapping.model.PropertyNameFieldNamingStrategy;
 import org.springframework.data.mongodb.MongoDbFactory;
 import org.springframework.data.mongodb.core.MongoTemplate;
 import org.springframework.data.mongodb.core.SimpleMongoDbFactory;
+import org.springframework.data.mongodb.core.convert.CustomConversions;
+import org.springframework.data.mongodb.core.convert.DbRefResolver;
+import org.springframework.data.mongodb.core.convert.DefaultDbRefResolver;
 import org.springframework.data.mongodb.core.convert.MappingMongoConverter;
 import org.springframework.data.mongodb.core.mapping.Document;
 import org.springframework.data.mongodb.core.mapping.MongoMappingContext;
+import org.springframework.data.support.CachingIsNewStrategyFactory;
+import org.springframework.data.support.IsNewStrategyFactory;
 import org.springframework.util.ClassUtils;
 import org.springframework.util.StringUtils;
 
+import com.mongodb.Mongo;
+
+/**
+ * Base class for Spring Data MongoDB configuration using JavaConfig.
+ * 
+ * @author Mark Pollack
+ * @author Oliver Gierke
+ * @author Thomas Darimont
+ * @author Ryan Tenney
+ */
 @Configuration
 public abstract class AbstractMongoConfiguration {
 
-	public abstract String getDatabaseName();
+	/**
+	 * Return the name of the database to connect to.
+	 * 
+	 * @return must not be {@literal null}.
+	 */
+	protected abstract String getDatabaseName();
 
-	@Bean
+	/**
+	 * Return the name of the authentication database to use. Defaults to {@literal null} and will turn into the value
+	 * returned by {@link #getDatabaseName()} later on effectively.
+	 * 
+	 * @return
+	 */
+	protected String getAuthenticationDatabaseName() {
+		return null;
+	}
+
+	/**
+	 * Return the {@link Mongo} instance to connect to. Annotate with {@link Bean} in case you want to expose a
+	 * {@link Mongo} instance to the {@link org.springframework.context.ApplicationContext}.
+	 * 
+	 * @return
+	 * @throws Exception
+	 */
 	public abstract Mongo mongo() throws Exception;
 
+	/**
+	 * Creates a {@link MongoTemplate}.
+	 * 
+	 * @return
+	 * @throws Exception
+	 */
 	@Bean
 	public MongoTemplate mongoTemplate() throws Exception {
 		return new MongoTemplate(mongoDbFactory(), mappingMongoConverter());
 	}
 
+	/**
+	 * Creates a {@link SimpleMongoDbFactory} to be used by the {@link MongoTemplate}. Will use the {@link Mongo} instance
+	 * configured in {@link #mongo()}.
+	 * 
+	 * @see #mongo()
+	 * @see #mongoTemplate()
+	 * @return
+	 * @throws Exception
+	 */
 	@Bean
 	public MongoDbFactory mongoDbFactory() throws Exception {
-		if (getUserCredentials() == null) {
-			return new SimpleMongoDbFactory(mongo(), getDatabaseName());
-		} else {
-			return new SimpleMongoDbFactory(mongo(), getDatabaseName(), getUserCredentials());
-		}
+		return new SimpleMongoDbFactory(mongo(), getDatabaseName(), getUserCredentials(), getAuthenticationDatabaseName());
 	}
 
-	public String getMappingBasePackage() {
-		return "";
+	/**
+	 * Return the base package to scan for mapped {@link Document}s. Will return the package name of the configuration
+	 * class' (the concrete class, not this one here) by default. So if you have a {@code com.acme.AppConfig} extending
+	 * {@link AbstractMongoConfiguration} the base package will be considered {@code com.acme} unless the method is
+	 * overriden to implement alternate behaviour.
+	 * 
+	 * @return the base package to scan for mapped {@link Document} classes or {@literal null} to not enable scanning for
+	 *         entities.
+	 */
+	protected String getMappingBasePackage() {
+
+		Package mappingBasePackage = getClass().getPackage();
+		return mappingBasePackage == null ? null : mappingBasePackage.getName();
 	}
 
-	public UserCredentials getUserCredentials() {
+	/**
+	 * Return {@link UserCredentials} to be used when connecting to the MongoDB instance or {@literal null} if none shall
+	 * be used.
+	 * 
+	 * @return
+	 */
+	protected UserCredentials getUserCredentials() {
 		return null;
 	}
 
+	/**
+	 * Creates a {@link MongoMappingContext} equipped with entity classes scanned from the mapping base package.
+	 * 
+	 * @see #getMappingBasePackage()
+	 * @return
+	 * @throws ClassNotFoundException
+	 */
 	@Bean
-	public MongoMappingContext mongoMappingContext() throws ClassNotFoundException, LinkageError {
+	public MongoMappingContext mongoMappingContext() throws ClassNotFoundException {
+
 		MongoMappingContext mappingContext = new MongoMappingContext();
+		mappingContext.setInitialEntitySet(getInitialEntitySet());
+		mappingContext.setSimpleTypeHolder(customConversions().getSimpleTypeHolder());
+		mappingContext.setFieldNamingStrategy(fieldNamingStrategy());
+
+		return mappingContext;
+	}
+
+	/**
+	 * Returns a {@link MappingContextIsNewStrategyFactory} wrapped into a {@link CachingIsNewStrategyFactory}.
+	 * 
+	 * @return
+	 * @throws ClassNotFoundException
+	 */
+	@Bean
+	public IsNewStrategyFactory isNewStrategyFactory() throws ClassNotFoundException {
+		return new CachingIsNewStrategyFactory(new MappingContextIsNewStrategyFactory(mongoMappingContext()));
+	}
+
+	/**
+	 * Register custom {@link Converter}s in a {@link CustomConversions} object if required. These
+	 * {@link CustomConversions} will be registered with the {@link #mappingMongoConverter()} and
+	 * {@link #mongoMappingContext()}. Returns an empty {@link CustomConversions} instance by default.
+	 * 
+	 * @return must not be {@literal null}.
+	 */
+	@Bean
+	public CustomConversions customConversions() {
+		return new CustomConversions(Collections.emptyList());
+	}
+
+	/**
+	 * Creates a {@link MappingMongoConverter} using the configured {@link #mongoDbFactory()} and
+	 * {@link #mongoMappingContext()}. Will get {@link #customConversions()} applied.
+	 * 
+	 * @see #customConversions()
+	 * @see #mongoMappingContext()
+	 * @see #mongoDbFactory()
+	 * @return
+	 * @throws Exception
+	 */
+	@Bean
+	public MappingMongoConverter mappingMongoConverter() throws Exception {
+
+		DbRefResolver dbRefResolver = new DefaultDbRefResolver(mongoDbFactory());
+		MappingMongoConverter converter = new MappingMongoConverter(dbRefResolver, mongoMappingContext());
+		converter.setCustomConversions(customConversions());
+
+		return converter;
+	}
+
+	/**
+	 * Scans the mapping base package for classes annotated with {@link Document}.
+	 * 
+	 * @see #getMappingBasePackage()
+	 * @return
+	 * @throws ClassNotFoundException
+	 */
+	protected Set<Class<?>> getInitialEntitySet() throws ClassNotFoundException {
+
 		String basePackage = getMappingBasePackage();
+		Set<Class<?>> initialEntitySet = new HashSet<Class<?>>();
+
 		if (StringUtils.hasText(basePackage)) {
 			ClassPathScanningCandidateComponentProvider componentProvider = new ClassPathScanningCandidateComponentProvider(
 					false);
 			componentProvider.addIncludeFilter(new AnnotationTypeFilter(Document.class));
 			componentProvider.addIncludeFilter(new AnnotationTypeFilter(Persistent.class));
 
-			Set<Class<?>> initialEntitySet = new HashSet<Class<?>>();
 			for (BeanDefinition candidate : componentProvider.findCandidateComponents(basePackage)) {
-				initialEntitySet.add(ClassUtils.forName(candidate.getBeanClassName(), mappingContext.getClass()
-						.getClassLoader()));
+				initialEntitySet.add(ClassUtils.forName(candidate.getBeanClassName(),
+						AbstractMongoConfiguration.class.getClassLoader()));
 			}
-			mappingContext.setInitialEntitySet(initialEntitySet);
 		}
-		return mappingContext;
-	}
 
-	@Bean
-	public MappingMongoConverter mappingMongoConverter() throws Exception {
-		MappingMongoConverter converter = new MappingMongoConverter(mongoDbFactory(), mongoMappingContext());
-		afterMappingMongoConverterCreation(converter);
-		return converter;
+		return initialEntitySet;
 	}
 
 	/**
-	 * Hook that allows post-processing after the MappingMongoConverter has been successfully created.
+	 * Configures whether to abbreviate field names for domain objects by configuring a
+	 * {@link CamelCaseAbbreviatingFieldNamingStrategy} on the {@link MongoMappingContext} instance created. For advanced
+	 * customization needs, consider overriding {@link #mappingMongoConverter()}.
 	 * 
-	 * @param converter
+	 * @return
 	 */
-	protected void afterMappingMongoConverterCreation(MappingMongoConverter converter) {
+	protected boolean abbreviateFieldNames() {
+		return false;
+	}
+
+	/**
+	 * Configures a {@link FieldNamingStrategy} on the {@link MongoMappingContext} instance created.
+	 * 
+	 * @return
+	 * @since 1.5
+	 */
+	protected FieldNamingStrategy fieldNamingStrategy() {
+		return abbreviateFieldNames() ? new CamelCaseAbbreviatingFieldNamingStrategy()
+				: PropertyNameFieldNamingStrategy.INSTANCE;
 	}
 }

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/BeanNames.java

@@ -1,11 +1,11 @@
 /*
- * Copyright (c) 2011 by the original author(s).
+ * Copyright 2011-2014 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
@@ -13,16 +13,25 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package org.springframework.data.mongodb.config;
 
 /**
- * @author Jon Brisbin <jbrisbin@vmware.com>
+ * Constants to declare bean names used by the namespace configuration.
+ * 
+ * @author Jon Brisbin
+ * @author Oliver Gierke
+ * @author Martin Baumgartner
  */
 public abstract class BeanNames {
 
-	static final String MAPPING_CONTEXT = "mappingContext";
-	static final String INDEX_HELPER = "indexCreationHelper";
-	static final String MONGO = "mongo";
-	static final String DB_FACTORY = "mongoDbFactory";
+	public static final String MAPPING_CONTEXT_BEAN_NAME = "mongoMappingContext";
+
+	static final String INDEX_HELPER_BEAN_NAME = "indexCreationHelper";
+	static final String MONGO_BEAN_NAME = "mongo";
+	static final String DB_FACTORY_BEAN_NAME = "mongoDbFactory";
+	static final String VALIDATING_EVENT_LISTENER_BEAN_NAME = "validatingMongoEventListener";
+	static final String IS_NEW_STRATEGY_FACTORY_BEAN_NAME = "isNewStrategyFactory";
+	static final String DEFAULT_CONVERTER_BEAN_NAME = "mappingConverter";
+	static final String MONGO_TEMPLATE_BEAN_NAME = "mongoTemplate";
+	static final String GRID_FS_TEMPLATE_BEAN_NAME = "gridFsTemplate";
 }

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/EnableMongoAuditing.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.config;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Inherited;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import org.springframework.context.annotation.Import;
+import org.springframework.data.auditing.DateTimeProvider;
+import org.springframework.data.domain.AuditorAware;
+
+/**
+ * Annotation to enable auditing in MongoDB via annotation configuration.
+ * 
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ */
+@Inherited
+@Documented
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+@Import(MongoAuditingRegistrar.class)
+public @interface EnableMongoAuditing {
+
+	/**
+	 * Configures the {@link AuditorAware} bean to be used to lookup the current principal.
+	 * 
+	 * @return
+	 */
+	String auditorAwareRef() default "";
+
+	/**
+	 * Configures whether the creation and modification dates are set. Defaults to {@literal true}.
+	 * 
+	 * @return
+	 */
+	boolean setDates() default true;
+
+	/**
+	 * Configures whether the entity shall be marked as modified on creation. Defaults to {@literal true}.
+	 * 
+	 * @return
+	 */
+	boolean modifyOnCreate() default true;
+
+	/**
+	 * Configures a {@link DateTimeProvider} bean name that allows customizing the {@link org.joda.time.DateTime} to be
+	 * used for setting creation and modification dates.
+	 * 
+	 * @return
+	 */
+	String dateTimeProviderRef() default "";
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/GridFsTemplateParser.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright 2013-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.config;
+
+import org.springframework.beans.factory.BeanDefinitionStoreException;
+import org.springframework.beans.factory.config.BeanDefinition;
+import org.springframework.beans.factory.support.AbstractBeanDefinition;
+import org.springframework.beans.factory.support.BeanDefinitionBuilder;
+import org.springframework.beans.factory.xml.AbstractBeanDefinitionParser;
+import org.springframework.beans.factory.xml.BeanDefinitionParser;
+import org.springframework.beans.factory.xml.ParserContext;
+import org.springframework.data.config.BeanComponentDefinitionBuilder;
+import org.springframework.data.mongodb.gridfs.GridFsTemplate;
+import org.springframework.util.StringUtils;
+import org.w3c.dom.Element;
+
+/**
+ * {@link BeanDefinitionParser} to parse {@code gridFsTemplate} elements into {@link BeanDefinition}s.
+ * 
+ * @author Martin Baumgartner
+ */
+class GridFsTemplateParser extends AbstractBeanDefinitionParser {
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.xml.AbstractBeanDefinitionParser#resolveId(org.w3c.dom.Element, org.springframework.beans.factory.support.AbstractBeanDefinition, org.springframework.beans.factory.xml.ParserContext)
+	 */
+	@Override
+	protected String resolveId(Element element, AbstractBeanDefinition definition, ParserContext parserContext)
+			throws BeanDefinitionStoreException {
+
+		String id = super.resolveId(element, definition, parserContext);
+		return StringUtils.hasText(id) ? id : BeanNames.GRID_FS_TEMPLATE_BEAN_NAME;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.xml.AbstractBeanDefinitionParser#parseInternal(org.w3c.dom.Element, org.springframework.beans.factory.xml.ParserContext)
+	 */
+	@Override
+	protected AbstractBeanDefinition parseInternal(Element element, ParserContext parserContext) {
+
+		BeanComponentDefinitionBuilder helper = new BeanComponentDefinitionBuilder(element, parserContext);
+
+		String converterRef = element.getAttribute("converter-ref");
+		String dbFactoryRef = element.getAttribute("db-factory-ref");
+		String bucket = element.getAttribute("bucket");
+
+		BeanDefinitionBuilder gridFsTemplateBuilder = BeanDefinitionBuilder.genericBeanDefinition(GridFsTemplate.class);
+
+		if (StringUtils.hasText(dbFactoryRef)) {
+			gridFsTemplateBuilder.addConstructorArgReference(dbFactoryRef);
+		} else {
+			gridFsTemplateBuilder.addConstructorArgReference(BeanNames.DB_FACTORY_BEAN_NAME);
+		}
+
+		if (StringUtils.hasText(converterRef)) {
+			gridFsTemplateBuilder.addConstructorArgReference(converterRef);
+		} else {
+			gridFsTemplateBuilder.addConstructorArgReference(BeanNames.DEFAULT_CONVERTER_BEAN_NAME);
+		}
+
+		if (StringUtils.hasText(bucket)) {
+			gridFsTemplateBuilder.addConstructorArgValue(bucket);
+		}
+
+		return (AbstractBeanDefinition) helper.getComponentIdButFallback(gridFsTemplateBuilder, BeanNames.GRID_FS_TEMPLATE_BEAN_NAME)
+				.getBeanDefinition();
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/MappingMongoConverterParser.java

@@ -1,11 +1,11 @@
 /*
- * Copyright (c) 2011 by the original author(s).
+ * Copyright 2011-2014 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
@@ -13,66 +13,97 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package org.springframework.data.mongodb.config;
 
 import static org.springframework.data.mongodb.config.BeanNames.*;
 
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
 import org.springframework.beans.BeanMetadataElement;
-import org.springframework.beans.factory.BeanDefinitionStoreException;
 import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.beans.factory.config.BeanDefinition;
 import org.springframework.beans.factory.config.BeanDefinitionHolder;
 import org.springframework.beans.factory.config.RuntimeBeanReference;
+import org.springframework.beans.factory.parsing.BeanComponentDefinition;
+import org.springframework.beans.factory.parsing.CompositeComponentDefinition;
+import org.springframework.beans.factory.parsing.ReaderContext;
 import org.springframework.beans.factory.support.AbstractBeanDefinition;
 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
 import org.springframework.beans.factory.support.BeanDefinitionRegistry;
 import org.springframework.beans.factory.support.GenericBeanDefinition;
 import org.springframework.beans.factory.support.ManagedList;
 import org.springframework.beans.factory.support.ManagedSet;
+import org.springframework.beans.factory.support.RootBeanDefinition;
 import org.springframework.beans.factory.xml.AbstractBeanDefinitionParser;
+import org.springframework.beans.factory.xml.BeanDefinitionParser;
 import org.springframework.beans.factory.xml.ParserContext;
 import org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider;
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.core.convert.converter.GenericConverter;
+import org.springframework.core.type.classreading.MetadataReader;
+import org.springframework.core.type.classreading.MetadataReaderFactory;
 import org.springframework.core.type.filter.AnnotationTypeFilter;
+import org.springframework.core.type.filter.AssignableTypeFilter;
+import org.springframework.core.type.filter.TypeFilter;
 import org.springframework.data.annotation.Persistent;
+import org.springframework.data.config.BeanComponentDefinitionBuilder;
+import org.springframework.data.mapping.context.MappingContextIsNewStrategyFactory;
+import org.springframework.data.mapping.model.CamelCaseAbbreviatingFieldNamingStrategy;
 import org.springframework.data.mongodb.core.convert.CustomConversions;
 import org.springframework.data.mongodb.core.convert.MappingMongoConverter;
 import org.springframework.data.mongodb.core.index.MongoPersistentEntityIndexCreator;
 import org.springframework.data.mongodb.core.mapping.Document;
 import org.springframework.data.mongodb.core.mapping.MongoMappingContext;
+import org.springframework.data.mongodb.core.mapping.event.ValidatingMongoEventListener;
+import org.springframework.util.Assert;
+import org.springframework.util.ClassUtils;
 import org.springframework.util.StringUtils;
 import org.springframework.util.xml.DomUtils;
 import org.w3c.dom.Element;
 
 /**
- * @author Jon Brisbin <jbrisbin@vmware.com>
+ * Bean definition parser for the {@code mapping-converter} element.
+ * 
+ * @author Jon Brisbin
  * @author Oliver Gierke
+ * @author Maciej Walkowiak
+ * @author Thomas Darimont
+ * @author Christoph Strobl
  */
-public class MappingMongoConverterParser extends AbstractBeanDefinitionParser {
+public class MappingMongoConverterParser implements BeanDefinitionParser {
 
 	private static final String BASE_PACKAGE = "base-package";
+	private static final boolean JSR_303_PRESENT = ClassUtils.isPresent("javax.validation.Validator",
+			MappingMongoConverterParser.class.getClassLoader());
 
-	@Override
-	protected String resolveId(Element element, AbstractBeanDefinition definition, ParserContext parserContext)
-			throws BeanDefinitionStoreException {
-		String id = super.resolveId(element, definition, parserContext);
-		return StringUtils.hasText(id) ? id : "mappingConverter";
-	}
+	/* (non-Javadoc)
+	 * @see org.springframework.beans.factory.xml.BeanDefinitionParser#parse(org.w3c.dom.Element, org.springframework.beans.factory.xml.ParserContext)
+	 */
+	public BeanDefinition parse(Element element, ParserContext parserContext) {
+
+		if (parserContext.isNested()) {
+			parserContext.getReaderContext().error("Mongo Converter must not be defined as nested bean.", element);
+		}
 
-	@Override
-	protected AbstractBeanDefinition parseInternal(Element element, ParserContext parserContext) {
 		BeanDefinitionRegistry registry = parserContext.getRegistry();
+		String id = element.getAttribute(AbstractBeanDefinitionParser.ID_ATTRIBUTE);
+		id = StringUtils.hasText(id) ? id : DEFAULT_CONVERTER_BEAN_NAME;
+
+		parserContext.pushContainingComponent(new CompositeComponentDefinition("Mapping Mongo Converter", element));
 
 		BeanDefinition conversionsDefinition = getCustomConversions(element, parserContext);
-		String ctxRef = potentiallyCreateMappingContext(element, parserContext, conversionsDefinition);
+		String ctxRef = potentiallyCreateMappingContext(element, parserContext, conversionsDefinition, id);
+
+		createIsNewStrategyFactoryBeanDefinition(ctxRef, parserContext, element);
 
 		// Need a reference to a Mongo instance
 		String dbFactoryRef = element.getAttribute("db-factory-ref");
 		if (!StringUtils.hasText(dbFactoryRef)) {
-			dbFactoryRef = DB_FACTORY;
+			dbFactoryRef = DB_FACTORY_BEAN_NAME;
 		}
 
 		// Converter
@@ -80,75 +111,181 @@ public class MappingMongoConverterParser extends AbstractBeanDefinitionParser {
 		converterBuilder.addConstructorArgReference(dbFactoryRef);
 		converterBuilder.addConstructorArgReference(ctxRef);
 
+		String typeMapperRef = element.getAttribute("type-mapper-ref");
+		if (StringUtils.hasText(typeMapperRef)) {
+			converterBuilder.addPropertyReference("typeMapper", typeMapperRef);
+		}
+
 		if (conversionsDefinition != null) {
 			converterBuilder.addPropertyValue("customConversions", conversionsDefinition);
 		}
 
 		try {
-			registry.getBeanDefinition(INDEX_HELPER);
+			registry.getBeanDefinition(INDEX_HELPER_BEAN_NAME);
 		} catch (NoSuchBeanDefinitionException ignored) {
 			if (!StringUtils.hasText(dbFactoryRef)) {
-				dbFactoryRef = DB_FACTORY;
+				dbFactoryRef = DB_FACTORY_BEAN_NAME;
 			}
 			BeanDefinitionBuilder indexHelperBuilder = BeanDefinitionBuilder
 					.genericBeanDefinition(MongoPersistentEntityIndexCreator.class);
-			indexHelperBuilder.addConstructorArgValue(new RuntimeBeanReference(ctxRef));
-			indexHelperBuilder.addConstructorArgValue(new RuntimeBeanReference(dbFactoryRef));
-			registry.registerBeanDefinition(INDEX_HELPER, indexHelperBuilder.getBeanDefinition());
+			indexHelperBuilder.addConstructorArgReference(ctxRef);
+			indexHelperBuilder.addConstructorArgReference(dbFactoryRef);
+			indexHelperBuilder.addDependsOn(ctxRef);
+
+			parserContext.registerBeanComponent(new BeanComponentDefinition(indexHelperBuilder.getBeanDefinition(),
+					INDEX_HELPER_BEAN_NAME));
 		}
 
-		return converterBuilder.getBeanDefinition();
+		BeanDefinition validatingMongoEventListener = potentiallyCreateValidatingMongoEventListener(element, parserContext);
+
+		if (validatingMongoEventListener != null) {
+			parserContext.registerBeanComponent(new BeanComponentDefinition(validatingMongoEventListener,
+					VALIDATING_EVENT_LISTENER_BEAN_NAME));
+		}
+
+		parserContext.registerBeanComponent(new BeanComponentDefinition(converterBuilder.getBeanDefinition(), id));
+		parserContext.popAndRegisterContainingComponent();
+		return null;
 	}
 
-	private String potentiallyCreateMappingContext(Element element, ParserContext parserContext,
-			BeanDefinition conversionsDefinition) {
+	private BeanDefinition potentiallyCreateValidatingMongoEventListener(Element element, ParserContext parserContext) {
 
-		String ctxRef = element.getAttribute("mapping-context-ref");
-		if (!StringUtils.hasText(ctxRef)) {
-			BeanDefinitionBuilder mappingContextBuilder = BeanDefinitionBuilder
-					.genericBeanDefinition(MongoMappingContext.class);
+		String disableValidation = element.getAttribute("disable-validation");
+		boolean validationDisabled = StringUtils.hasText(disableValidation) && Boolean.valueOf(disableValidation);
 
-			Set<String> classesToAdd = getInititalEntityClasses(element, mappingContextBuilder);
-			if (classesToAdd != null) {
-				mappingContextBuilder.addPropertyValue("initialEntitySet", classesToAdd);
+		if (!validationDisabled) {
+
+			BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition();
+			RuntimeBeanReference validator = getValidator(builder, parserContext);
+
+			if (validator != null) {
+				builder.getRawBeanDefinition().setBeanClass(ValidatingMongoEventListener.class);
+				builder.addConstructorArgValue(validator);
+
+				return builder.getBeanDefinition();
 			}
-
-			if (conversionsDefinition != null) {
-				AbstractBeanDefinition simpleTypesDefinition = new GenericBeanDefinition();
-				simpleTypesDefinition.setFactoryBeanName("customConversions");
-				simpleTypesDefinition.setFactoryMethodName("getSimpleTypeHolder");
-
-				mappingContextBuilder.addPropertyValue("simpleTypeHolder", simpleTypesDefinition);
-			}
-
-			parserContext.getRegistry().registerBeanDefinition(MAPPING_CONTEXT, mappingContextBuilder.getBeanDefinition());
-			ctxRef = MAPPING_CONTEXT;
 		}
 
+		return null;
+	}
+
+	private RuntimeBeanReference getValidator(Object source, ParserContext parserContext) {
+
+		if (!JSR_303_PRESENT) {
+			return null;
+		}
+
+		RootBeanDefinition validatorDef = new RootBeanDefinition(
+				"org.springframework.validation.beanvalidation.LocalValidatorFactoryBean");
+		validatorDef.setSource(source);
+		validatorDef.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
+		String validatorName = parserContext.getReaderContext().registerWithGeneratedName(validatorDef);
+		parserContext.registerBeanComponent(new BeanComponentDefinition(validatorDef, validatorName));
+
+		return new RuntimeBeanReference(validatorName);
+	}
+
+	public static String potentiallyCreateMappingContext(Element element, ParserContext parserContext,
+			BeanDefinition conversionsDefinition, String converterId) {
+
+		String ctxRef = element.getAttribute("mapping-context-ref");
+
+		if (StringUtils.hasText(ctxRef)) {
+			return ctxRef;
+		}
+
+		BeanComponentDefinitionBuilder componentDefinitionBuilder = new BeanComponentDefinitionBuilder(element,
+				parserContext);
+
+		BeanDefinitionBuilder mappingContextBuilder = BeanDefinitionBuilder
+				.genericBeanDefinition(MongoMappingContext.class);
+
+		Set<String> classesToAdd = getInititalEntityClasses(element);
+
+		if (classesToAdd != null) {
+			mappingContextBuilder.addPropertyValue("initialEntitySet", classesToAdd);
+		}
+
+		if (conversionsDefinition != null) {
+			AbstractBeanDefinition simpleTypesDefinition = new GenericBeanDefinition();
+			simpleTypesDefinition.setFactoryBeanName("customConversions");
+			simpleTypesDefinition.setFactoryMethodName("getSimpleTypeHolder");
+
+			mappingContextBuilder.addPropertyValue("simpleTypeHolder", simpleTypesDefinition);
+		}
+
+		parseFieldNamingStrategy(element, parserContext.getReaderContext(), mappingContextBuilder);
+
+		ctxRef = converterId == null || DEFAULT_CONVERTER_BEAN_NAME.equals(converterId) ? MAPPING_CONTEXT_BEAN_NAME
+				: converterId + "." + MAPPING_CONTEXT_BEAN_NAME;
+
+		parserContext.registerBeanComponent(componentDefinitionBuilder.getComponent(mappingContextBuilder, ctxRef));
 		return ctxRef;
 	}
 
+	private static void parseFieldNamingStrategy(Element element, ReaderContext context, BeanDefinitionBuilder builder) {
+
+		String abbreviateFieldNames = element.getAttribute("abbreviate-field-names");
+		String fieldNamingStrategy = element.getAttribute("field-naming-strategy-ref");
+
+		boolean fieldNamingStrategyReferenced = StringUtils.hasText(fieldNamingStrategy);
+		boolean abbreviationActivated = StringUtils.hasText(abbreviateFieldNames)
+				&& Boolean.parseBoolean(abbreviateFieldNames);
+
+		if (fieldNamingStrategyReferenced && abbreviationActivated) {
+			context.error("Field name abbreviation cannot be activated if a field-naming-strategy-ref is configured!",
+					element);
+			return;
+		}
+
+		Object value = null;
+
+		if ("true".equals(abbreviateFieldNames)) {
+			value = new RootBeanDefinition(CamelCaseAbbreviatingFieldNamingStrategy.class);
+		} else if (fieldNamingStrategyReferenced) {
+			value = new RuntimeBeanReference(fieldNamingStrategy);
+		}
+
+		if (value != null) {
+			builder.addPropertyValue("fieldNamingStrategy", value);
+		}
+	}
+
 	private BeanDefinition getCustomConversions(Element element, ParserContext parserContext) {
 
 		List<Element> customConvertersElements = DomUtils.getChildElementsByTagName(element, "custom-converters");
 
 		if (customConvertersElements.size() == 1) {
+
 			Element customerConvertersElement = customConvertersElements.get(0);
 			ManagedList<BeanMetadataElement> converterBeans = new ManagedList<BeanMetadataElement>();
 			List<Element> converterElements = DomUtils.getChildElementsByTagName(customerConvertersElement, "converter");
+
 			if (converterElements != null) {
 				for (Element listenerElement : converterElements) {
 					converterBeans.add(parseConverter(listenerElement, parserContext));
 				}
 			}
 
+			// Scan for Converter and GenericConverter beans in the given base-package
+			String packageToScan = customerConvertersElement.getAttribute(BASE_PACKAGE);
+			if (StringUtils.hasText(packageToScan)) {
+				ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(true);
+				provider.addExcludeFilter(new NegatingFilter(new AssignableTypeFilter(Converter.class),
+						new AssignableTypeFilter(GenericConverter.class)));
+
+				for (BeanDefinition candidate : provider.findCandidateComponents(packageToScan)) {
+					converterBeans.add(candidate);
+				}
+			}
+
 			BeanDefinitionBuilder conversionsBuilder = BeanDefinitionBuilder.rootBeanDefinition(CustomConversions.class);
 			conversionsBuilder.addConstructorArgValue(converterBeans);
 
 			AbstractBeanDefinition conversionsBean = conversionsBuilder.getBeanDefinition();
 			conversionsBean.setSource(parserContext.extractSource(element));
 
-			parserContext.getRegistry().registerBeanDefinition("customConversions", conversionsBean);
+			parserContext.registerBeanComponent(new BeanComponentDefinition(conversionsBean, "customConversions"));
 
 			return conversionsBean;
 		}
@@ -156,7 +293,7 @@ public class MappingMongoConverterParser extends AbstractBeanDefinitionParser {
 		return null;
 	}
 
-	public Set<String> getInititalEntityClasses(Element element, BeanDefinitionBuilder builder) {
+	private static Set<String> getInititalEntityClasses(Element element) {
 
 		String basePackage = element.getAttribute(BASE_PACKAGE);
 
@@ -194,4 +331,53 @@ public class MappingMongoConverterParser extends AbstractBeanDefinitionParser {
 				"Element <converter> must specify 'ref' or contain a bean definition for the converter", element);
 		return null;
 	}
+
+	public static String createIsNewStrategyFactoryBeanDefinition(String mappingContextRef, ParserContext context,
+			Element element) {
+
+		BeanDefinitionBuilder mappingContextStrategyFactoryBuilder = BeanDefinitionBuilder
+				.rootBeanDefinition(MappingContextIsNewStrategyFactory.class);
+		mappingContextStrategyFactoryBuilder.addConstructorArgReference(mappingContextRef);
+
+		BeanComponentDefinitionBuilder builder = new BeanComponentDefinitionBuilder(element, context);
+		context.registerBeanComponent(builder.getComponent(mappingContextStrategyFactoryBuilder,
+				IS_NEW_STRATEGY_FACTORY_BEAN_NAME));
+
+		return IS_NEW_STRATEGY_FACTORY_BEAN_NAME;
+	}
+
+	/**
+	 * {@link TypeFilter} that returns {@literal false} in case any of the given delegates matches.
+	 * 
+	 * @author Oliver Gierke
+	 */
+	private static class NegatingFilter implements TypeFilter {
+
+		private final Set<TypeFilter> delegates;
+
+		/**
+		 * Creates a new {@link NegatingFilter} with the given delegates.
+		 * 
+		 * @param filters
+		 */
+		public NegatingFilter(TypeFilter... filters) {
+			Assert.notNull(filters);
+			this.delegates = new HashSet<TypeFilter>(Arrays.asList(filters));
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see org.springframework.core.type.filter.TypeFilter#match(org.springframework.core.type.classreading.MetadataReader, org.springframework.core.type.classreading.MetadataReaderFactory)
+		 */
+		public boolean match(MetadataReader metadataReader, MetadataReaderFactory metadataReaderFactory) throws IOException {
+
+			for (TypeFilter delegate : delegates) {
+				if (delegate.match(metadataReader, metadataReaderFactory)) {
+					return false;
+				}
+			}
+
+			return true;
+		}
+	}
 }

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/MongoAuditingBeanDefinitionParser.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright 2012-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.config;
+
+import static org.springframework.data.config.ParsingUtils.*;
+import static org.springframework.data.mongodb.config.BeanNames.*;
+
+import org.springframework.beans.factory.support.BeanDefinitionBuilder;
+import org.springframework.beans.factory.support.BeanDefinitionRegistry;
+import org.springframework.beans.factory.support.RootBeanDefinition;
+import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser;
+import org.springframework.beans.factory.xml.BeanDefinitionParser;
+import org.springframework.beans.factory.xml.ParserContext;
+import org.springframework.data.auditing.config.IsNewAwareAuditingHandlerBeanDefinitionParser;
+import org.springframework.data.mongodb.core.mapping.MongoMappingContext;
+import org.springframework.data.mongodb.core.mapping.event.AuditingEventListener;
+import org.springframework.util.StringUtils;
+import org.w3c.dom.Element;
+
+/**
+ * {@link BeanDefinitionParser} to register a {@link AuditingEventListener} to transparently set auditing information on
+ * an entity.
+ * 
+ * @author Oliver Gierke
+ */
+public class MongoAuditingBeanDefinitionParser extends AbstractSingleBeanDefinitionParser {
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser#getBeanClass(org.w3c.dom.Element)
+	 */
+	@Override
+	protected Class<?> getBeanClass(Element element) {
+		return AuditingEventListener.class;
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.xml.AbstractBeanDefinitionParser#shouldGenerateId()
+	 */
+	@Override
+	protected boolean shouldGenerateId() {
+		return true;
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser#doParse(org.w3c.dom.Element, org.springframework.beans.factory.xml.ParserContext, org.springframework.beans.factory.support.BeanDefinitionBuilder)
+	 */
+	@Override
+	protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
+
+		String mappingContextRef = element.getAttribute("mapping-context-ref");
+
+		if (!StringUtils.hasText(mappingContextRef)) {
+
+			BeanDefinitionRegistry registry = parserContext.getRegistry();
+
+			if (!registry.containsBeanDefinition(MAPPING_CONTEXT_BEAN_NAME)) {
+				registry.registerBeanDefinition(MAPPING_CONTEXT_BEAN_NAME, new RootBeanDefinition(MongoMappingContext.class));
+			}
+
+			mappingContextRef = MAPPING_CONTEXT_BEAN_NAME;
+		}
+
+		IsNewAwareAuditingHandlerBeanDefinitionParser parser = new IsNewAwareAuditingHandlerBeanDefinitionParser(
+				mappingContextRef);
+		parser.parse(element, parserContext);
+
+		builder.addConstructorArgValue(getObjectFactoryBeanDefinition(parser.getResolvedBeanName(),
+				parserContext.extractSource(element)));
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/MongoAuditingRegistrar.java

@@ -0,0 +1,130 @@
+/*
+ * Copyright 2013-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.config;
+
+import static org.springframework.beans.factory.config.BeanDefinition.*;
+import static org.springframework.data.mongodb.config.BeanNames.*;
+
+import java.lang.annotation.Annotation;
+
+import org.springframework.beans.factory.config.BeanDefinition;
+import org.springframework.beans.factory.support.BeanDefinitionBuilder;
+import org.springframework.beans.factory.support.BeanDefinitionRegistry;
+import org.springframework.beans.factory.support.RootBeanDefinition;
+import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
+import org.springframework.core.type.AnnotationMetadata;
+import org.springframework.data.auditing.IsNewAwareAuditingHandler;
+import org.springframework.data.auditing.config.AuditingBeanDefinitionRegistrarSupport;
+import org.springframework.data.auditing.config.AuditingConfiguration;
+import org.springframework.data.config.ParsingUtils;
+import org.springframework.data.mongodb.core.mapping.MongoMappingContext;
+import org.springframework.data.mongodb.core.mapping.event.AuditingEventListener;
+import org.springframework.data.support.IsNewStrategyFactory;
+import org.springframework.util.Assert;
+
+/**
+ * {@link ImportBeanDefinitionRegistrar} to enable {@link EnableMongoAuditing} annotation.
+ * 
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ */
+class MongoAuditingRegistrar extends AuditingBeanDefinitionRegistrarSupport {
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.auditing.config.AuditingBeanDefinitionRegistrarSupport#getAnnotation()
+	 */
+	@Override
+	protected Class<? extends Annotation> getAnnotation() {
+		return EnableMongoAuditing.class;
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.auditing.config.AuditingBeanDefinitionRegistrarSupport#getAuditingHandlerBeanName()
+	 */
+	@Override
+	protected String getAuditingHandlerBeanName() {
+		return "mongoAuditingHandler";
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.auditing.config.AuditingBeanDefinitionRegistrarSupport#registerBeanDefinitions(org.springframework.core.type.AnnotationMetadata, org.springframework.beans.factory.support.BeanDefinitionRegistry)
+	 */
+	@Override
+	public void registerBeanDefinitions(AnnotationMetadata annotationMetadata, BeanDefinitionRegistry registry) {
+
+		Assert.notNull(annotationMetadata, "AnnotationMetadata must not be null!");
+		Assert.notNull(registry, "BeanDefinitionRegistry must not be null!");
+
+		defaultDependenciesIfNecessary(registry, annotationMetadata);
+		super.registerBeanDefinitions(annotationMetadata, registry);
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.auditing.config.AuditingBeanDefinitionRegistrarSupport#getAuditHandlerBeanDefinitionBuilder(org.springframework.data.auditing.config.AuditingConfiguration)
+	 */
+	@Override
+	protected BeanDefinitionBuilder getAuditHandlerBeanDefinitionBuilder(AuditingConfiguration configuration) {
+
+		Assert.notNull(configuration, "AuditingConfiguration must not be null!");
+
+		BeanDefinitionBuilder builder = BeanDefinitionBuilder.rootBeanDefinition(IsNewAwareAuditingHandler.class);
+		builder.addConstructorArgReference(MAPPING_CONTEXT_BEAN_NAME);
+		return configureDefaultAuditHandlerAttributes(configuration, builder);
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.auditing.config.AuditingBeanDefinitionRegistrarSupport#registerAuditListener(org.springframework.beans.factory.config.BeanDefinition, org.springframework.beans.factory.support.BeanDefinitionRegistry)
+	 */
+	@Override
+	protected void registerAuditListenerBeanDefinition(BeanDefinition auditingHandlerDefinition,
+			BeanDefinitionRegistry registry) {
+
+		Assert.notNull(auditingHandlerDefinition, "BeanDefinition must not be null!");
+		Assert.notNull(registry, "BeanDefinitionRegistry must not be null!");
+
+		BeanDefinitionBuilder listenerBeanDefinitionBuilder = BeanDefinitionBuilder
+				.rootBeanDefinition(AuditingEventListener.class);
+		listenerBeanDefinitionBuilder.addConstructorArgValue(ParsingUtils.getObjectFactoryBeanDefinition(
+				getAuditingHandlerBeanName(), registry));
+
+		registerInfrastructureBeanWithId(listenerBeanDefinitionBuilder.getBeanDefinition(),
+				AuditingEventListener.class.getName(), registry);
+	}
+
+	/**
+	 * Register default bean definitions for a {@link MongoMappingContext} and an {@link IsNewStrategyFactory} in case we
+	 * don't find beans with the assumed names in the registry.
+	 * 
+	 * @param registry the {@link BeanDefinitionRegistry} to use to register the components into.
+	 * @param source the source which the registered components shall be registered with
+	 */
+	private void defaultDependenciesIfNecessary(BeanDefinitionRegistry registry, Object source) {
+
+		if (!registry.containsBeanDefinition(MAPPING_CONTEXT_BEAN_NAME)) {
+
+			RootBeanDefinition definition = new RootBeanDefinition(MongoMappingContext.class);
+			definition.setRole(ROLE_INFRASTRUCTURE);
+			definition.setSource(source);
+
+			registry.registerBeanDefinition(MAPPING_CONTEXT_BEAN_NAME, definition);
+		}
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/MongoDbFactoryParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2011 by the original author(s).
+ * Copyright 2011-2014 by the original author(s).
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,19 +15,19 @@
  */
 package org.springframework.data.mongodb.config;
 
-import static org.springframework.data.mongodb.config.BeanNames.*;
-import static org.springframework.data.mongodb.config.ParsingUtils.*;
+import static org.springframework.data.config.ParsingUtils.*;
+import static org.springframework.data.mongodb.config.MongoParsingUtils.*;
 
 import org.springframework.beans.factory.BeanDefinitionStoreException;
 import org.springframework.beans.factory.config.BeanDefinition;
-import org.springframework.beans.factory.config.RuntimeBeanReference;
+import org.springframework.beans.factory.parsing.BeanComponentDefinition;
 import org.springframework.beans.factory.support.AbstractBeanDefinition;
 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
-import org.springframework.beans.factory.support.BeanDefinitionReaderUtils;
 import org.springframework.beans.factory.xml.AbstractBeanDefinitionParser;
 import org.springframework.beans.factory.xml.BeanDefinitionParser;
 import org.springframework.beans.factory.xml.ParserContext;
 import org.springframework.data.authentication.UserCredentials;
+import org.springframework.data.config.BeanComponentDefinitionBuilder;
 import org.springframework.data.mongodb.core.MongoFactoryBean;
 import org.springframework.data.mongodb.core.SimpleMongoDbFactory;
 import org.springframework.util.StringUtils;
@@ -41,52 +41,70 @@ import com.mongodb.MongoURI;
  * 
  * @author Jon Brisbin
  * @author Oliver Gierke
+ * @author Thomas Darimont
  */
 public class MongoDbFactoryParser extends AbstractBeanDefinitionParser {
 
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.xml.AbstractBeanDefinitionParser#resolveId(org.w3c.dom.Element, org.springframework.beans.factory.support.AbstractBeanDefinition, org.springframework.beans.factory.xml.ParserContext)
+	 */
 	@Override
 	protected String resolveId(Element element, AbstractBeanDefinition definition, ParserContext parserContext)
 			throws BeanDefinitionStoreException {
-		String id = element.getAttribute("id");
-		if (!StringUtils.hasText(id)) {
-			id = DB_FACTORY;
-		}
-		return id;
+
+		String id = super.resolveId(element, definition, parserContext);
+		return StringUtils.hasText(id) ? id : BeanNames.DB_FACTORY_BEAN_NAME;
 	}
 
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.xml.AbstractBeanDefinitionParser#parseInternal(org.w3c.dom.Element, org.springframework.beans.factory.xml.ParserContext)
+	 */
 	@Override
 	protected AbstractBeanDefinition parseInternal(Element element, ParserContext parserContext) {
-		
+
+		Object source = parserContext.extractSource(element);
+
+		BeanComponentDefinitionBuilder helper = new BeanComponentDefinitionBuilder(element, parserContext);
+
 		String uri = element.getAttribute("uri");
 		String mongoRef = element.getAttribute("mongo-ref");
 		String dbname = element.getAttribute("dbname");
+
 		BeanDefinition userCredentials = getUserCredentialsBeanDefinition(element, parserContext);
 
 		// Common setup
 		BeanDefinitionBuilder dbFactoryBuilder = BeanDefinitionBuilder.genericBeanDefinition(SimpleMongoDbFactory.class);
-		ParsingUtils.setPropertyValue(element, dbFactoryBuilder, "write-concern", "writeConcern");
-		
+		setPropertyValue(dbFactoryBuilder, element, "write-concern", "writeConcern");
+
 		if (StringUtils.hasText(uri)) {
-			if(StringUtils.hasText(mongoRef) || StringUtils.hasText(dbname) || userCredentials != null) {
-				parserContext.getReaderContext().error("Configure either Mongo URI or details individually!", parserContext.extractSource(element));
+			if (StringUtils.hasText(mongoRef) || StringUtils.hasText(dbname) || userCredentials != null) {
+				parserContext.getReaderContext().error("Configure either Mongo URI or details individually!", source);
 			}
-			
+
 			dbFactoryBuilder.addConstructorArgValue(getMongoUri(uri));
 			return getSourceBeanDefinition(dbFactoryBuilder, parserContext, element);
 		}
-		
-		// Defaulting
-		mongoRef = StringUtils.hasText(mongoRef) ? mongoRef : registerMongoBeanDefinition(element, parserContext);
-		dbname = StringUtils.hasText(dbname) ? dbname : "db";
-		
-		dbFactoryBuilder.addConstructorArgValue(new RuntimeBeanReference(mongoRef));
-		dbFactoryBuilder.addConstructorArgValue(dbname);
 
-		if (userCredentials != null) {
-			dbFactoryBuilder.addConstructorArgValue(userCredentials);
+		// Defaulting
+		if (StringUtils.hasText(mongoRef)) {
+			dbFactoryBuilder.addConstructorArgReference(mongoRef);
+		} else {
+			dbFactoryBuilder.addConstructorArgValue(registerMongoBeanDefinition(element, parserContext));
 		}
 
-		return getSourceBeanDefinition(dbFactoryBuilder, parserContext, element);
+		dbFactoryBuilder.addConstructorArgValue(StringUtils.hasText(dbname) ? dbname : "db");
+		dbFactoryBuilder.addConstructorArgValue(userCredentials);
+		dbFactoryBuilder.addConstructorArgValue(element.getAttribute("authentication-dbname"));
+
+		BeanDefinitionBuilder writeConcernPropertyEditorBuilder = getWriteConcernPropertyEditorBuilder();
+
+		BeanComponentDefinition component = helper.getComponent(writeConcernPropertyEditorBuilder);
+		parserContext.registerBeanComponent(component);
+
+		return (AbstractBeanDefinition) helper.getComponentIdButFallback(dbFactoryBuilder, BeanNames.DB_FACTORY_BEAN_NAME)
+				.getBeanDefinition();
 	}
 
 	/**
@@ -97,14 +115,13 @@ public class MongoDbFactoryParser extends AbstractBeanDefinitionParser {
 	 * @param parserContext must not be {@literal null}.
 	 * @return
 	 */
-	private String registerMongoBeanDefinition(Element element, ParserContext parserContext) {
+	private BeanDefinition registerMongoBeanDefinition(Element element, ParserContext parserContext) {
 
 		BeanDefinitionBuilder mongoBuilder = BeanDefinitionBuilder.genericBeanDefinition(MongoFactoryBean.class);
-		ParsingUtils.setPropertyValue(element, mongoBuilder, "host");
-		ParsingUtils.setPropertyValue(element, mongoBuilder, "port");
+		setPropertyValue(mongoBuilder, element, "host");
+		setPropertyValue(mongoBuilder, element, "port");
 
-		return BeanDefinitionReaderUtils.registerWithGeneratedName(mongoBuilder.getBeanDefinition(),
-				parserContext.getRegistry());
+		return getSourceBeanDefinition(mongoBuilder, parserContext, element);
 	}
 
 	/**
@@ -128,7 +145,7 @@ public class MongoDbFactoryParser extends AbstractBeanDefinitionParser {
 
 		return getSourceBeanDefinition(userCredentialsBuilder, context, element);
 	}
-	
+
 	/**
 	 * Creates a {@link BeanDefinition} for a {@link MongoURI}.
 	 * 
@@ -136,10 +153,10 @@ public class MongoDbFactoryParser extends AbstractBeanDefinitionParser {
 	 * @return
 	 */
 	private BeanDefinition getMongoUri(String uri) {
-		
+
 		BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(MongoURI.class);
 		builder.addConstructorArgValue(uri);
-		
+
 		return builder.getBeanDefinition();
 	}
 }

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/MongoNamespaceHandler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2011 the original author or authors.
+ * Copyright 2011-2014 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,26 +16,27 @@
 package org.springframework.data.mongodb.config;
 
 import org.springframework.beans.factory.xml.NamespaceHandlerSupport;
-import org.springframework.data.mongodb.repository.config.MongoRepositoryConfigParser;
 
 /**
- * {@link org.springframework.beans.factory.xml.NamespaceHandler} for Mongo DB based repositories.
+ * {@link org.springframework.beans.factory.xml.NamespaceHandler} for Mongo DB configuration.
  * 
  * @author Oliver Gierke
+ * @author Martin Baumgartner
  */
 public class MongoNamespaceHandler extends NamespaceHandlerSupport {
 
 	/*
-	* (non-Javadoc)
-	*
-	* @see org.springframework.beans.factory.xml.NamespaceHandler#init()
-	*/
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.xml.NamespaceHandler#init()
+	 */
 	public void init() {
 
-		registerBeanDefinitionParser("repositories", new MongoRepositoryConfigParser());
 		registerBeanDefinitionParser("mapping-converter", new MappingMongoConverterParser());
 		registerBeanDefinitionParser("mongo", new MongoParser());
 		registerBeanDefinitionParser("db-factory", new MongoDbFactoryParser());
 		registerBeanDefinitionParser("jmx", new MongoJmxParser());
+		registerBeanDefinitionParser("auditing", new MongoAuditingBeanDefinitionParser());
+		registerBeanDefinitionParser("template", new MongoTemplateParser());
+		registerBeanDefinitionParser("gridFsTemplate", new GridFsTemplateParser());
 	}
 }

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/MongoParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2011 the original author or authors.
+ * Copyright 2011-2014 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,50 +13,81 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package org.springframework.data.mongodb.config;
 
-import org.springframework.beans.factory.BeanDefinitionStoreException;
-import org.springframework.beans.factory.support.AbstractBeanDefinition;
+import java.util.Map;
+
+import org.springframework.beans.factory.config.BeanDefinition;
+import org.springframework.beans.factory.config.CustomEditorConfigurer;
+import org.springframework.beans.factory.parsing.BeanComponentDefinition;
+import org.springframework.beans.factory.parsing.CompositeComponentDefinition;
 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
-import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser;
+import org.springframework.beans.factory.support.ManagedMap;
+import org.springframework.beans.factory.xml.BeanDefinitionParser;
 import org.springframework.beans.factory.xml.ParserContext;
+import org.springframework.data.config.BeanComponentDefinitionBuilder;
+import org.springframework.data.config.ParsingUtils;
 import org.springframework.data.mongodb.core.MongoFactoryBean;
 import org.springframework.util.StringUtils;
 import org.w3c.dom.Element;
 
 /**
- * Parser for <mongo;gt; definitions. If no name
+ * Parser for <mongo;gt; definitions.
  * 
  * @author Mark Pollack
+ * @author Oliver Gierke
  */
-public class MongoParser extends AbstractSingleBeanDefinitionParser {
+public class MongoParser implements BeanDefinitionParser {
 
-	@Override
-	protected Class<?> getBeanClass(Element element) {
-		return MongoFactoryBean.class;
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.xml.BeanDefinitionParser#parse(org.w3c.dom.Element, org.springframework.beans.factory.xml.ParserContext)
+	 */
+	public BeanDefinition parse(Element element, ParserContext parserContext) {
+
+		Object source = parserContext.extractSource(element);
+		String id = element.getAttribute("id");
+
+		BeanComponentDefinitionBuilder helper = new BeanComponentDefinitionBuilder(element, parserContext);
+
+		BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(MongoFactoryBean.class);
+		ParsingUtils.setPropertyValue(builder, element, "port", "port");
+		ParsingUtils.setPropertyValue(builder, element, "host", "host");
+		ParsingUtils.setPropertyValue(builder, element, "write-concern", "writeConcern");
+
+		MongoParsingUtils.parseMongoOptions(element, builder);
+		MongoParsingUtils.parseReplicaSet(element, builder);
+
+		String defaultedId = StringUtils.hasText(id) ? id : BeanNames.MONGO_BEAN_NAME;
+
+		parserContext.pushContainingComponent(new CompositeComponentDefinition("Mongo", source));
+
+		BeanComponentDefinition mongoComponent = helper.getComponent(builder, defaultedId);
+		parserContext.registerBeanComponent(mongoComponent);
+		BeanComponentDefinition serverAddressPropertyEditor = helper.getComponent(registerServerAddressPropertyEditor());
+		parserContext.registerBeanComponent(serverAddressPropertyEditor);
+		BeanComponentDefinition writeConcernPropertyEditor = helper.getComponent(MongoParsingUtils
+				.getWriteConcernPropertyEditorBuilder());
+		parserContext.registerBeanComponent(writeConcernPropertyEditor);
+
+		parserContext.popAndRegisterContainingComponent();
+
+		return mongoComponent.getBeanDefinition();
 	}
 
-	@Override
-	protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
-		super.doParse(element, builder);
+	/**
+	 * One should only register one bean definition but want to have the convenience of using
+	 * AbstractSingleBeanDefinitionParser but have the side effect of registering a 'default' property editor with the
+	 * container.
+	 */
+	private BeanDefinitionBuilder registerServerAddressPropertyEditor() {
 
-		ParsingUtils.setPropertyValue(element, builder, "port", "port");
-		ParsingUtils.setPropertyValue(element, builder, "host", "host");
-		ParsingUtils.setPropertyValue(element, builder, "write-concern", "writeConcern");
-
-		ParsingUtils.parseMongoOptions(parserContext, element, builder);
-		ParsingUtils.parseReplicaSet(parserContext, element, builder);
+		Map<String, String> customEditors = new ManagedMap<String, String>();
+		customEditors.put("com.mongodb.ServerAddress[]",
+				"org.springframework.data.mongodb.config.ServerAddressPropertyEditor");
 
+		BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(CustomEditorConfigurer.class);
+		builder.addPropertyValue("customEditors", customEditors);
+		return builder;
 	}
-
-	@Override
-	protected String resolveId(Element element, AbstractBeanDefinition definition, ParserContext parserContext)
-			throws BeanDefinitionStoreException {
-		String name = super.resolveId(element, definition, parserContext);
-		if (!StringUtils.hasText(name)) {
-			name = "mongo";
-		}
-		return name;
-	}
-}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/MongoParsingUtils.java

@@ -0,0 +1,106 @@
+/*
+ * Copyright 2011-2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.config;
+
+import static org.springframework.data.config.ParsingUtils.*;
+
+import java.util.Map;
+
+import org.springframework.beans.factory.config.BeanDefinition;
+import org.springframework.beans.factory.config.CustomEditorConfigurer;
+import org.springframework.beans.factory.support.BeanDefinitionBuilder;
+import org.springframework.beans.factory.support.ManagedMap;
+import org.springframework.beans.factory.xml.BeanDefinitionParser;
+import org.springframework.data.mongodb.core.MongoOptionsFactoryBean;
+import org.springframework.util.xml.DomUtils;
+import org.w3c.dom.Element;
+
+/**
+ * Utility methods for {@link BeanDefinitionParser} implementations for MongoDB.
+ * 
+ * @author Mark Pollack
+ * @author Oliver Gierke
+ * @author Thomas Darimont
+ */
+abstract class MongoParsingUtils {
+
+	private MongoParsingUtils() {
+
+	}
+
+	/**
+	 * Parses the mongo replica-set element.
+	 * 
+	 * @param parserContext the parser context
+	 * @param element the mongo element
+	 * @param mongoBuilder the bean definition builder to populate
+	 * @return
+	 */
+	static void parseReplicaSet(Element element, BeanDefinitionBuilder mongoBuilder) {
+		setPropertyValue(mongoBuilder, element, "replica-set", "replicaSetSeeds");
+	}
+
+	/**
+	 * Parses the mongo:options sub-element. Populates the given attribute factory with the proper attributes.
+	 * 
+	 * @return true if parsing actually occured, false otherwise
+	 */
+	static boolean parseMongoOptions(Element element, BeanDefinitionBuilder mongoBuilder) {
+		Element optionsElement = DomUtils.getChildElementByTagName(element, "options");
+		if (optionsElement == null) {
+			return false;
+		}
+
+		BeanDefinitionBuilder optionsDefBuilder = BeanDefinitionBuilder
+				.genericBeanDefinition(MongoOptionsFactoryBean.class);
+
+		setPropertyValue(optionsDefBuilder, optionsElement, "connections-per-host", "connectionsPerHost");
+		setPropertyValue(optionsDefBuilder, optionsElement, "threads-allowed-to-block-for-connection-multiplier",
+				"threadsAllowedToBlockForConnectionMultiplier");
+		setPropertyValue(optionsDefBuilder, optionsElement, "max-wait-time", "maxWaitTime");
+		setPropertyValue(optionsDefBuilder, optionsElement, "connect-timeout", "connectTimeout");
+		setPropertyValue(optionsDefBuilder, optionsElement, "socket-timeout", "socketTimeout");
+		setPropertyValue(optionsDefBuilder, optionsElement, "socket-keep-alive", "socketKeepAlive");
+		setPropertyValue(optionsDefBuilder, optionsElement, "auto-connect-retry", "autoConnectRetry");
+		setPropertyValue(optionsDefBuilder, optionsElement, "max-auto-connect-retry-time", "maxAutoConnectRetryTime");
+		setPropertyValue(optionsDefBuilder, optionsElement, "write-number", "writeNumber");
+		setPropertyValue(optionsDefBuilder, optionsElement, "write-timeout", "writeTimeout");
+		setPropertyValue(optionsDefBuilder, optionsElement, "write-fsync", "writeFsync");
+		setPropertyValue(optionsDefBuilder, optionsElement, "slave-ok", "slaveOk");
+		setPropertyValue(optionsDefBuilder, optionsElement, "ssl", "ssl");
+		setPropertyReference(optionsDefBuilder, optionsElement, "ssl-socket-factory-ref", "sslSocketFactory");
+
+		mongoBuilder.addPropertyValue("mongoOptions", optionsDefBuilder.getBeanDefinition());
+		return true;
+	}
+
+	/**
+	 * Returns the {@link BeanDefinitionBuilder} to build a {@link BeanDefinition} for a
+	 * {@link WriteConcernPropertyEditor}.
+	 * 
+	 * @return
+	 */
+	static BeanDefinitionBuilder getWriteConcernPropertyEditorBuilder() {
+
+		Map<String, Class<?>> customEditors = new ManagedMap<String, Class<?>>();
+		customEditors.put("com.mongodb.WriteConcern", WriteConcernPropertyEditor.class);
+
+		BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(CustomEditorConfigurer.class);
+		builder.addPropertyValue("customEditors", customEditors);
+
+		return builder;
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/MongoTemplateParser.java

@@ -0,0 +1,87 @@
+/*
+ * Copyright 2011-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.config;
+
+import static org.springframework.data.config.ParsingUtils.*;
+import static org.springframework.data.mongodb.config.MongoParsingUtils.*;
+
+import org.springframework.beans.factory.BeanDefinitionStoreException;
+import org.springframework.beans.factory.config.BeanDefinition;
+import org.springframework.beans.factory.parsing.BeanComponentDefinition;
+import org.springframework.beans.factory.support.AbstractBeanDefinition;
+import org.springframework.beans.factory.support.BeanDefinitionBuilder;
+import org.springframework.beans.factory.xml.AbstractBeanDefinitionParser;
+import org.springframework.beans.factory.xml.BeanDefinitionParser;
+import org.springframework.beans.factory.xml.ParserContext;
+import org.springframework.data.config.BeanComponentDefinitionBuilder;
+import org.springframework.data.mongodb.core.MongoTemplate;
+import org.springframework.util.StringUtils;
+import org.w3c.dom.Element;
+
+/**
+ * {@link BeanDefinitionParser} to parse {@code template} elements into {@link BeanDefinition}s.
+ * 
+ * @author Martin Baumgartner
+ * @author Oliver Gierke
+ */
+class MongoTemplateParser extends AbstractBeanDefinitionParser {
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.xml.AbstractBeanDefinitionParser#resolveId(org.w3c.dom.Element, org.springframework.beans.factory.support.AbstractBeanDefinition, org.springframework.beans.factory.xml.ParserContext)
+	 */
+	@Override
+	protected String resolveId(Element element, AbstractBeanDefinition definition, ParserContext parserContext)
+			throws BeanDefinitionStoreException {
+
+		String id = super.resolveId(element, definition, parserContext);
+		return StringUtils.hasText(id) ? id : BeanNames.MONGO_TEMPLATE_BEAN_NAME;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.xml.AbstractBeanDefinitionParser#parseInternal(org.w3c.dom.Element, org.springframework.beans.factory.xml.ParserContext)
+	 */
+	@Override
+	protected AbstractBeanDefinition parseInternal(Element element, ParserContext parserContext) {
+
+		BeanComponentDefinitionBuilder helper = new BeanComponentDefinitionBuilder(element, parserContext);
+
+		String converterRef = element.getAttribute("converter-ref");
+		String dbFactoryRef = element.getAttribute("db-factory-ref");
+
+		BeanDefinitionBuilder mongoTemplateBuilder = BeanDefinitionBuilder.genericBeanDefinition(MongoTemplate.class);
+		setPropertyValue(mongoTemplateBuilder, element, "write-concern", "writeConcern");
+
+		if (StringUtils.hasText(dbFactoryRef)) {
+			mongoTemplateBuilder.addConstructorArgReference(dbFactoryRef);
+		} else {
+			mongoTemplateBuilder.addConstructorArgReference(BeanNames.DB_FACTORY_BEAN_NAME);
+		}
+
+		if (StringUtils.hasText(converterRef)) {
+			mongoTemplateBuilder.addConstructorArgReference(converterRef);
+		}
+
+		BeanDefinitionBuilder writeConcernPropertyEditorBuilder = getWriteConcernPropertyEditorBuilder();
+
+		BeanComponentDefinition component = helper.getComponent(writeConcernPropertyEditorBuilder);
+		parserContext.registerBeanComponent(component);
+
+		return (AbstractBeanDefinition) helper.getComponentIdButFallback(mongoTemplateBuilder,
+				BeanNames.MONGO_TEMPLATE_BEAN_NAME).getBeanDefinition();
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/ParsingUtils.java

@@ -1,130 +0,0 @@
-/*
- * Copyright (c) 2011 by the original author(s).
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.data.mongodb.config;
-
-import org.springframework.beans.factory.config.BeanDefinition;
-import org.springframework.beans.factory.support.AbstractBeanDefinition;
-import org.springframework.beans.factory.support.BeanDefinitionBuilder;
-import org.springframework.beans.factory.support.ManagedList;
-import org.springframework.beans.factory.xml.ParserContext;
-import org.springframework.data.mongodb.core.MongoOptionsFactoryBean;
-import org.springframework.util.StringUtils;
-import org.springframework.util.xml.DomUtils;
-import org.w3c.dom.Element;
-
-import com.mongodb.ServerAddress;
-
-abstract class ParsingUtils {
-
-	/**
-	 * Parses the mongo replica-set element.
-	 * 
-	 * @param parserContext the parser context
-	 * @param element the mongo element
-	 * @param mongoBuilder the bean definition builder to populate
-	 * @return true if parsing actually occured, false otherwise
-	 */
-	static boolean parseReplicaSet(ParserContext parserContext, Element element, BeanDefinitionBuilder mongoBuilder) {
-
-		String replicaSetString = element.getAttribute("replica-set");
-		if (StringUtils.hasText(replicaSetString)) {
-			ManagedList<Object> serverAddresses = new ManagedList<Object>();
-			String[] replicaSetStringArray = StringUtils.commaDelimitedListToStringArray(replicaSetString);
-			for (String element2 : replicaSetStringArray) {
-				String[] hostAndPort = StringUtils.delimitedListToStringArray(element2, ":");
-				BeanDefinitionBuilder defBuilder = BeanDefinitionBuilder.genericBeanDefinition(ServerAddress.class);
-				defBuilder.addConstructorArgValue(hostAndPort[0]);
-				defBuilder.addConstructorArgValue(hostAndPort[1]);
-				serverAddresses.add(defBuilder.getBeanDefinition());
-			}
-			if (!serverAddresses.isEmpty()) {
-				mongoBuilder.addPropertyValue("replicaSetSeeds", serverAddresses);
-			}
-		}
-		return true;
-
-	}
-
-	/**
-	 * Parses the mongo:options sub-element. Populates the given attribute factory with the proper attributes.
-	 * 
-	 * @return true if parsing actually occured, false otherwise
-	 */
-	static boolean parseMongoOptions(ParserContext parserContext, Element element, BeanDefinitionBuilder mongoBuilder) {
-		Element optionsElement = DomUtils.getChildElementByTagName(element, "options");
-		if (optionsElement == null) {
-			return false;
-		}
-
-		BeanDefinitionBuilder optionsDefBuilder = BeanDefinitionBuilder
-				.genericBeanDefinition(MongoOptionsFactoryBean.class);
-
-		setPropertyValue(optionsElement, optionsDefBuilder, "connections-per-host", "connectionsPerHost");
-		setPropertyValue(optionsElement, optionsDefBuilder, "threads-allowed-to-block-for-connection-multiplier",
-				"threadsAllowedToBlockForConnectionMultiplier");
-		setPropertyValue(optionsElement, optionsDefBuilder, "max-wait-time", "maxWaitTime");
-		setPropertyValue(optionsElement, optionsDefBuilder, "connect-timeout", "connectTimeout");
-		setPropertyValue(optionsElement, optionsDefBuilder, "socket-timeout", "socketTimeout");
-		setPropertyValue(optionsElement, optionsDefBuilder, "socket-keep-alive", "socketKeepAlive");
-		setPropertyValue(optionsElement, optionsDefBuilder, "auto-connect-retry", "autoConnectRetry");
-		setPropertyValue(optionsElement, optionsDefBuilder, "max-auto-connect-retry-time", "maxAutoConnectRetryTime");
-		setPropertyValue(optionsElement, optionsDefBuilder, "write-number", "writeNumber");
-		setPropertyValue(optionsElement, optionsDefBuilder, "write-timeout", "writeTimeout");
-		setPropertyValue(optionsElement, optionsDefBuilder, "write-fsync", "writeFsync");
-		setPropertyValue(optionsElement, optionsDefBuilder, "slave-ok", "slaveOk");
-
-		mongoBuilder.addPropertyValue("mongoOptions", optionsDefBuilder.getBeanDefinition());
-		return true;
-	}
-
-	static void setPropertyValue(Element element, BeanDefinitionBuilder builder, String attrName, String propertyName) {
-		String attr = element.getAttribute(attrName);
-		if (StringUtils.hasText(attr)) {
-			builder.addPropertyValue(propertyName, attr);
-		}
-	}
-
-	/**
-	 * Sets the property with the given attribute name on the given {@link BeanDefinitionBuilder} to the value of the
-	 * attribute with the given name.
-	 * 
-	 * @param element must not be {@literal null}.
-	 * @param builder must not be {@literal null}.
-	 * @param attrName must not be {@literal null} or empty.
-	 */
-	static void setPropertyValue(Element element, BeanDefinitionBuilder builder, String attrName) {
-		String attr = element.getAttribute(attrName);
-		if (StringUtils.hasText(attr)) {
-			builder.addPropertyValue(attrName, attr);
-		}
-	}
-
-	/**
-	 * Returns the {@link BeanDefinition} built by the given {@link BeanDefinitionBuilder} enriched with source
-	 * information derived from the given {@link Element}.
-	 * 
-	 * @param builder must not be {@literal null}.
-	 * @param context must not be {@literal null}.
-	 * @param element must not be {@literal null}.
-	 * @return
-	 */
-	static AbstractBeanDefinition getSourceBeanDefinition(BeanDefinitionBuilder builder, ParserContext context, Element element) {
-		AbstractBeanDefinition definition = builder.getBeanDefinition();
-		definition.setSource(context.extractSource(element));
-		return definition;
-	}
-}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/ServerAddressPropertyEditor.java

@@ -0,0 +1,136 @@
+/*
+ * Copyright 2011-2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.config;
+
+import java.beans.PropertyEditorSupport;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.util.Assert;
+import org.springframework.util.StringUtils;
+
+import com.mongodb.ServerAddress;
+
+/**
+ * Parse a {@link String} to a {@link ServerAddress} array. The format is host1:port1,host2:port2,host3:port3.
+ * 
+ * @author Mark Pollack
+ * @author Oliver Gierke
+ * @author Thomas Darimont
+ */
+public class ServerAddressPropertyEditor extends PropertyEditorSupport {
+
+	/**
+	 * A port is a number without a leading 0 at the end of the address that is proceeded by just a single :.
+	 */
+	private static final String HOST_PORT_SPLIT_PATTERN = "(?<!:):(?=[123456789]\\d*$)";
+	private static final String COULD_NOT_PARSE_ADDRESS_MESSAGE = "Could not parse address {} '{}'. Check your replica set configuration!";
+	private static final Logger LOG = LoggerFactory.getLogger(ServerAddressPropertyEditor.class);
+
+	/*
+	 * (non-Javadoc)
+	 * @see java.beans.PropertyEditorSupport#setAsText(java.lang.String)
+	 */
+	@Override
+	public void setAsText(String replicaSetString) {
+
+		if (!StringUtils.hasText(replicaSetString)) {
+			setValue(null);
+			return;
+		}
+
+		String[] replicaSetStringArray = StringUtils.commaDelimitedListToStringArray(replicaSetString);
+		Set<ServerAddress> serverAddresses = new HashSet<ServerAddress>(replicaSetStringArray.length);
+
+		for (String element : replicaSetStringArray) {
+
+			ServerAddress address = parseServerAddress(element);
+
+			if (address != null) {
+				serverAddresses.add(address);
+			}
+		}
+
+		if (serverAddresses.isEmpty()) {
+			throw new IllegalArgumentException(
+					"Could not resolve at least one server of the replica set configuration! Validate your config!");
+		}
+
+		setValue(serverAddresses.toArray(new ServerAddress[serverAddresses.size()]));
+	}
+
+	/**
+	 * Parses the given source into a {@link ServerAddress}.
+	 * 
+	 * @param source
+	 * @return the
+	 */
+	private ServerAddress parseServerAddress(String source) {
+
+		if (!StringUtils.hasText(source)) {
+			LOG.warn(COULD_NOT_PARSE_ADDRESS_MESSAGE, "source", source);
+			return null;
+		}
+
+		String[] hostAndPort = extractHostAddressAndPort(source.trim());
+
+		if (hostAndPort.length > 2) {
+			LOG.warn(COULD_NOT_PARSE_ADDRESS_MESSAGE, "source", source);
+			return null;
+		}
+
+		try {
+			InetAddress hostAddress = InetAddress.getByName(hostAndPort[0]);
+			Integer port = hostAndPort.length == 1 ? null : Integer.parseInt(hostAndPort[1]);
+
+			return port == null ? new ServerAddress(hostAddress) : new ServerAddress(hostAddress, port);
+		} catch (UnknownHostException e) {
+			LOG.warn(COULD_NOT_PARSE_ADDRESS_MESSAGE, "host", hostAndPort[0]);
+		} catch (NumberFormatException e) {
+			LOG.warn(COULD_NOT_PARSE_ADDRESS_MESSAGE, "port", hostAndPort[1]);
+		}
+
+		return null;
+	}
+
+	/**
+	 * Extract the host and port from the given {@link String}.
+	 * 
+	 * @param addressAndPortSource must not be {@literal null}.
+	 * @return
+	 */
+	private String[] extractHostAddressAndPort(String addressAndPortSource) {
+
+		Assert.notNull(addressAndPortSource, "Address and port source must not be null!");
+
+		String[] hostAndPort = addressAndPortSource.split(HOST_PORT_SPLIT_PATTERN);
+		String hostAddress = hostAndPort[0];
+
+		if (isHostAddressInIPv6BracketNotation(hostAddress)) {
+			hostAndPort[0] = hostAddress.substring(1, hostAddress.length() - 1);
+		}
+
+		return hostAndPort;
+	}
+
+	private boolean isHostAddressInIPv6BracketNotation(String hostAddress) {
+		return hostAddress.startsWith("[") && hostAddress.endsWith("]");
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/StringToWriteConcernConverter.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2012 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.config;
+
+import org.springframework.core.convert.converter.Converter;
+
+import com.mongodb.WriteConcern;
+
+/**
+ * Converter to create {@link WriteConcern} instances from String representations.
+ * 
+ * @author Oliver Gierke
+ */
+public class StringToWriteConcernConverter implements Converter<String, WriteConcern> {
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.core.convert.converter.Converter#convert(java.lang.Object)
+	 */
+	public WriteConcern convert(String source) {
+
+		WriteConcern writeConcern = WriteConcern.valueOf(source);
+		return writeConcern != null ? writeConcern : new WriteConcern(source);
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/config/WriteConcernPropertyEditor.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2011 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.config;
+
+import java.beans.PropertyEditorSupport;
+
+import com.mongodb.WriteConcern;
+
+/**
+ * Parse a string to a {@link WriteConcern}. If it is a well know {@link String} as identified by the
+ * {@link WriteConcern#valueOf(String)}, use the well known {@link WriteConcern} value, otherwise pass the string as is
+ * to the constructor of the write concern. There is no support for other constructor signatures when parsing from a
+ * string value.
+ * 
+ * @author Mark Pollack
+ */
+public class WriteConcernPropertyEditor extends PropertyEditorSupport {
+
+	/**
+	 * Parse a string to a List<ServerAddress>
+	 */
+	@Override
+	public void setAsText(String writeConcernString) {
+
+		WriteConcern writeConcern = WriteConcern.valueOf(writeConcernString);
+		if (writeConcern != null) {
+			// have a well known string
+			setValue(writeConcern);
+		} else {
+			// pass on the string to the constructor
+			setValue(new WriteConcern(writeConcernString));
+		}
+
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/CursorPreparer.java

@@ -22,7 +22,7 @@ import com.mongodb.DBCursor;
  * 
  * @author Oliver Gierke
  */
-public interface CursorPreparer {
+interface CursorPreparer {
 
 	/**
 	 * Prepare the given cursor (apply limits, skips and so on). Returns th eprepared cursor.

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/DefaultIndexOperations.java

@@ -0,0 +1,178 @@
+/*
+ * Copyright 2011-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core;
+
+import static org.springframework.data.domain.Sort.Direction.*;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.dao.DataAccessException;
+import org.springframework.data.mongodb.core.index.IndexDefinition;
+import org.springframework.data.mongodb.core.index.IndexField;
+import org.springframework.data.mongodb.core.index.IndexInfo;
+import org.springframework.util.Assert;
+
+import com.mongodb.DBCollection;
+import com.mongodb.DBObject;
+import com.mongodb.MongoException;
+
+/**
+ * Default implementation of {@link IndexOperations}.
+ * 
+ * @author Mark Pollack
+ * @author Oliver Gierke
+ * @author Komi Innocent
+ * @author Christoph Strobl
+ */
+public class DefaultIndexOperations implements IndexOperations {
+
+	private static final Double ONE = Double.valueOf(1);
+	private static final Double MINUS_ONE = Double.valueOf(-1);
+
+	private final MongoOperations mongoOperations;
+	private final String collectionName;
+
+	/**
+	 * Creates a new {@link DefaultIndexOperations}.
+	 * 
+	 * @param mongoOperations must not be {@literal null}.
+	 * @param collectionName must not be {@literal null}.
+	 */
+	public DefaultIndexOperations(MongoOperations mongoOperations, String collectionName) {
+
+		Assert.notNull(mongoOperations, "MongoOperations must not be null!");
+		Assert.notNull(collectionName, "Collection name can not be null!");
+
+		this.mongoOperations = mongoOperations;
+		this.collectionName = collectionName;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.IndexOperations#ensureIndex(org.springframework.data.mongodb.core.index.IndexDefinition)
+	 */
+	public void ensureIndex(final IndexDefinition indexDefinition) {
+		mongoOperations.execute(collectionName, new CollectionCallback<Object>() {
+			public Object doInCollection(DBCollection collection) throws MongoException, DataAccessException {
+				DBObject indexOptions = indexDefinition.getIndexOptions();
+				if (indexOptions != null) {
+					collection.ensureIndex(indexDefinition.getIndexKeys(), indexOptions);
+				} else {
+					collection.ensureIndex(indexDefinition.getIndexKeys());
+				}
+				return null;
+			}
+		});
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.IndexOperations#dropIndex(java.lang.String)
+	 */
+	public void dropIndex(final String name) {
+		mongoOperations.execute(collectionName, new CollectionCallback<Void>() {
+			public Void doInCollection(DBCollection collection) throws MongoException, DataAccessException {
+				collection.dropIndex(name);
+				return null;
+			}
+		});
+
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.IndexOperations#dropAllIndexes()
+	 */
+	public void dropAllIndexes() {
+		dropIndex("*");
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.IndexOperations#resetIndexCache()
+	 */
+	public void resetIndexCache() {
+		mongoOperations.execute(collectionName, new CollectionCallback<Void>() {
+			public Void doInCollection(DBCollection collection) throws MongoException, DataAccessException {
+				collection.resetIndexCache();
+				return null;
+			}
+		});
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.IndexOperations#getIndexInfo()
+	 */
+	public List<IndexInfo> getIndexInfo() {
+
+		return mongoOperations.execute(collectionName, new CollectionCallback<List<IndexInfo>>() {
+			public List<IndexInfo> doInCollection(DBCollection collection) throws MongoException, DataAccessException {
+				List<DBObject> dbObjectList = collection.getIndexInfo();
+				return getIndexData(dbObjectList);
+			}
+
+			private List<IndexInfo> getIndexData(List<DBObject> dbObjectList) {
+
+				List<IndexInfo> indexInfoList = new ArrayList<IndexInfo>();
+
+				for (DBObject ix : dbObjectList) {
+
+					DBObject keyDbObject = (DBObject) ix.get("key");
+					int numberOfElements = keyDbObject.keySet().size();
+
+					List<IndexField> indexFields = new ArrayList<IndexField>(numberOfElements);
+
+					for (String key : keyDbObject.keySet()) {
+
+						Object value = keyDbObject.get(key);
+
+						if ("2d".equals(value)) {
+							indexFields.add(IndexField.geo(key));
+						} else if ("text".equals(value)) {
+
+							DBObject weights = (DBObject) ix.get("weights");
+							for (String fieldName : weights.keySet()) {
+								indexFields.add(IndexField.text(fieldName, Float.valueOf(weights.get(fieldName).toString())));
+							}
+
+						} else {
+
+							Double keyValue = new Double(value.toString());
+
+							if (ONE.equals(keyValue)) {
+								indexFields.add(IndexField.create(key, ASC));
+							} else if (MINUS_ONE.equals(keyValue)) {
+								indexFields.add(IndexField.create(key, DESC));
+							}
+						}
+					}
+
+					String name = ix.get("name").toString();
+
+					boolean unique = ix.containsField("unique") ? (Boolean) ix.get("unique") : false;
+					boolean dropDuplicates = ix.containsField("dropDups") ? (Boolean) ix.get("dropDups") : false;
+					boolean sparse = ix.containsField("sparse") ? (Boolean) ix.get("sparse") : false;
+					String language = ix.containsField("default_language") ? (String) ix.get("default_language") : "";
+					indexInfoList.add(new IndexInfo(indexFields, name, unique, dropDuplicates, sparse, language));
+				}
+
+				return indexInfoList;
+			}
+		});
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/DocumentCallbackHandler.java

@@ -21,15 +21,16 @@ import com.mongodb.DBObject;
 import com.mongodb.MongoException;
 
 /**
- * An interface used by {@link MongoTemplate} for processing documents returned from a MongoDB query on a per-document basis.  
- * Implementations of this interface perform the actual work of prcoessing each document but don't need to worry about 
- * exception handling.  {@MongoException}s will be caught and translated by the calling MongoTemplate
+ * An interface used by {@link MongoTemplate} for processing documents returned from a MongoDB query on a per-document
+ * basis. Implementations of this interface perform the actual work of prcoessing each document but don't need to worry
+ * about exception handling. {@MongoException}s will be caught and translated by the calling
+ * MongoTemplate
  * 
- * An DocumentCallbackHandler is typically stateful: It keeps the result state within the object, to be available later for later
- * inspection.
+ * An DocumentCallbackHandler is typically stateful: It keeps the result state within the object, to be available later
+ * for later inspection.
  * 
  * @author Mark Pollack
- *
+ * 
  */
 public interface DocumentCallbackHandler {
 

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/FindAndModifyOptions.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2010-2011 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core;
+
+public class FindAndModifyOptions {
+
+	boolean returnNew;
+
+	boolean upsert;
+
+	boolean remove;
+
+	/**
+	 * Static factory method to create a FindAndModifyOptions instance
+	 * 
+	 * @return a new instance
+	 */
+	public static FindAndModifyOptions options() {
+		return new FindAndModifyOptions();
+	}
+
+	public FindAndModifyOptions returnNew(boolean returnNew) {
+		this.returnNew = returnNew;
+		return this;
+	}
+
+	public FindAndModifyOptions upsert(boolean upsert) {
+		this.upsert = upsert;
+		return this;
+	}
+
+	public FindAndModifyOptions remove(boolean remove) {
+		this.remove = remove;
+		return this;
+	}
+
+	public boolean isReturnNew() {
+		return returnNew;
+	}
+
+	public boolean isUpsert() {
+		return upsert;
+	}
+
+	public boolean isRemove() {
+		return remove;
+	}
+
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/IndexOperations.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2011 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core;
+
+import java.util.List;
+
+import org.springframework.data.mongodb.core.index.IndexDefinition;
+import org.springframework.data.mongodb.core.index.IndexInfo;
+
+
+/**
+ * Index operations on a collection.
+ * 
+ * @author Mark Pollack
+ * @author Oliver Gierke
+ */
+public interface IndexOperations {
+
+	/**
+	 * Ensure that an index for the provided {@link IndexDefinition} exists for the collection indicated by the entity
+	 * class. If not it will be created.
+	 * 
+	 * @param indexDefinition must not be {@literal null}.
+	 */
+	void ensureIndex(IndexDefinition indexDefinition);
+
+	/**
+	 * Drops an index from this collection.
+	 * 
+	 * @param name name of index to drop
+	 */
+	void dropIndex(String name);
+
+	/**
+	 * Drops all indices from this collection.
+	 */
+	void dropAllIndexes();
+
+	/**
+	 * Clears all indices that have not yet been applied to this collection.
+	 */
+	void resetIndexCache();
+
+	/**
+	 * Returns the index information on the collection.
+	 * 
+	 * @return index information on the collection
+	 */
+	List<IndexInfo> getIndexInfo();
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoAction.java

@@ -0,0 +1,99 @@
+/*
+ * Copyright 2011-2012 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core;
+
+import org.springframework.util.Assert;
+
+import com.mongodb.DBObject;
+import com.mongodb.WriteConcern;
+
+/**
+ * Represents an action taken against the collection. Used by {@link WriteConcernResolver} to determine a custom
+ * {@link WriteConcern} based on this information.
+ * <ul>
+ * <li>INSERT, SAVE have null query</li>
+ * <li>REMOVE has null document</li>
+ * <li>INSERT_LIST has null entityType, document, and query</li>
+ * </ul>
+ * 
+ * @author Mark Pollack
+ * @author Oliver Gierke
+ */
+public class MongoAction {
+
+	private final String collectionName;
+	private final WriteConcern defaultWriteConcern;
+	private final Class<?> entityType;
+	private final MongoActionOperation mongoActionOperation;
+	private final DBObject query;
+	private final DBObject document;
+
+	/**
+	 * Create an instance of a {@link MongoAction}.
+	 * 
+	 * @param defaultWriteConcern the default write concern.
+	 * @param mongoActionOperation action being taken against the collection
+	 * @param collectionName the collection name, must not be {@literal null} or empty.
+	 * @param entityType the POJO that is being operated against
+	 * @param document the converted DBObject from the POJO or Spring Update object
+	 * @param query the converted DBOjbect from the Spring Query object
+	 */
+	public MongoAction(WriteConcern defaultWriteConcern, MongoActionOperation mongoActionOperation,
+			String collectionName, Class<?> entityType, DBObject document, DBObject query) {
+
+		Assert.hasText(collectionName, "Collection name must not be null or empty!");
+
+		this.defaultWriteConcern = defaultWriteConcern;
+		this.mongoActionOperation = mongoActionOperation;
+		this.collectionName = collectionName;
+		this.entityType = entityType;
+		this.query = query;
+		this.document = document;
+	}
+
+	public String getCollectionName() {
+		return collectionName;
+	}
+
+	public WriteConcern getDefaultWriteConcern() {
+		return defaultWriteConcern;
+	}
+
+	/**
+	 * @deprecated use {@link #getEntityType()} instead.
+	 */
+	@Deprecated
+	public Class<?> getEntityClass() {
+		return entityType;
+	}
+
+	public Class<?> getEntityType() {
+		return entityType;
+	}
+
+	public MongoActionOperation getMongoActionOperation() {
+		return mongoActionOperation;
+	}
+
+	public DBObject getQuery() {
+		return query;
+	}
+
+	public DBObject getDocument() {
+		return document;
+	}
+
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoActionOperation.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2011-2012 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core;
+
+/**
+ * Enumeration for operations on a collection. Used with {@link MongoAction} to help determine the WriteConcern to use
+ * for a given mutating operation
+ * 
+ * @author Mark Pollack
+ * @author Oliver Gierke
+ * @see MongoAction
+ */
+public enum MongoActionOperation {
+
+	REMOVE, UPDATE, INSERT, INSERT_LIST, SAVE
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoAdmin.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2011 the original author or authors.
+ * Copyright 2011-2013 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,32 +15,30 @@
  */
 package org.springframework.data.mongodb.core;
 
-import com.mongodb.DB;
-import com.mongodb.Mongo;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
+import org.springframework.data.authentication.UserCredentials;
 import org.springframework.jmx.export.annotation.ManagedOperation;
 import org.springframework.jmx.export.annotation.ManagedResource;
+import org.springframework.util.Assert;
+
+import com.mongodb.DB;
+import com.mongodb.Mongo;
 
 /**
  * Mongo server administration exposed via JMX annotations
  * 
  * @author Mark Pollack
+ * @author Thomas Darimont
  */
-
 @ManagedResource(description = "Mongo Admin Operations")
 public class MongoAdmin implements MongoAdminOperations {
 
-	/**
-	 * Logger available to subclasses
-	 */
-	protected final Log logger = LogFactory.getLog(getClass());
-
-	private Mongo mongo;
+	private final Mongo mongo;
 	private String username;
 	private String password;
+	private String authenticationDatabaseName;
 
 	public MongoAdmin(Mongo mongo) {
+		Assert.notNull(mongo);
 		this.mongo = mongo;
 	}
 
@@ -83,11 +81,19 @@ public class MongoAdmin implements MongoAdminOperations {
 	 * @param password The password to use
 	 */
 	public void setPassword(String password) {
-
 		this.password = password;
 	}
 
+	/**
+	 * Sets the authenticationDatabaseName to use to authenticate with the Mongo database.
+	 * 
+	 * @param authenticationDatabaseName The authenticationDatabaseName to use.
+	 */
+	public void setAuthenticationDatabaseName(String authenticationDatabaseName) {
+		this.authenticationDatabaseName = authenticationDatabaseName;
+	}
+
 	DB getDB(String databaseName) {
-		return MongoDbUtils.getDB(mongo, databaseName, username, password == null ? null : password.toCharArray());
+		return MongoDbUtils.getDB(mongo, databaseName, new UserCredentials(username, password), authenticationDatabaseName);
 	}
 }

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoAdminOperations.java

@@ -1,16 +1,34 @@
+/*
+ * Copyright 2011-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.springframework.data.mongodb.core;
 
 import org.springframework.jmx.export.annotation.ManagedOperation;
 
+/**
+ * @author Mark Pollack
+ * @author Oliver Gierke
+ */
 public interface MongoAdminOperations {
 
 	@ManagedOperation
-	public abstract void dropDatabase(String databaseName);
+	void dropDatabase(String databaseName);
 
 	@ManagedOperation
-	public abstract void createDatabase(String databaseName);
+	void createDatabase(String databaseName);
 
 	@ManagedOperation
-	public abstract String getDatabaseStats(String databaseName);
-
-}
+	String getDatabaseStats(String databaseName);
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoDataIntegrityViolationException.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core;
+
+import org.springframework.dao.DataIntegrityViolationException;
+import org.springframework.util.Assert;
+
+import com.mongodb.WriteResult;
+
+/**
+ * Mongo-specific {@link DataIntegrityViolationException}.
+ * 
+ * @author Oliver Gierke
+ */
+public class MongoDataIntegrityViolationException extends DataIntegrityViolationException {
+
+	private static final long serialVersionUID = -186980521176764046L;
+
+	private final WriteResult writeResult;
+	private final MongoActionOperation actionOperation;
+
+	/**
+	 * Creates a new {@link MongoDataIntegrityViolationException} using the given message and {@link WriteResult}.
+	 * 
+	 * @param message the exception message
+	 * @param writeResult the {@link WriteResult} that causes the exception, must not be {@literal null}.
+	 * @param actionOperation the {@link MongoActionOperation} that caused the exception, must not be {@literal null}.
+	 */
+	public MongoDataIntegrityViolationException(String message, WriteResult writeResult,
+			MongoActionOperation actionOperation) {
+
+		super(message);
+
+		Assert.notNull(writeResult, "WriteResult must not be null!");
+		Assert.notNull(actionOperation, "MongoActionOperation must not be null!");
+
+		this.writeResult = writeResult;
+		this.actionOperation = actionOperation;
+	}
+
+	/**
+	 * Returns the {@link WriteResult} that caused the exception.
+	 * 
+	 * @return the writeResult
+	 */
+	public WriteResult getWriteResult() {
+		return writeResult;
+	}
+
+	/**
+	 * Returns the {@link MongoActionOperation} in which the current exception occured.
+	 * 
+	 * @return the actionOperation
+	 */
+	public MongoActionOperation getActionOperation() {
+		return actionOperation;
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoDbUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2011 the original author or authors.
+ * Copyright 2010-2013 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,28 +15,30 @@
  */
 package org.springframework.data.mongodb.core;
 
-import com.mongodb.DB;
-import com.mongodb.Mongo;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.data.authentication.UserCredentials;
 import org.springframework.data.mongodb.CannotGetMongoDbConnectionException;
 import org.springframework.transaction.support.TransactionSynchronizationManager;
 import org.springframework.util.Assert;
 
+import com.mongodb.DB;
+import com.mongodb.Mongo;
+
 /**
- * Helper class featuring helper methods for internal MongoDb classes.
- * <p/>
- * <p>
- * Mainly intended for internal use within the framework.
+ * Helper class featuring helper methods for internal MongoDb classes. Mainly intended for internal use within the
+ * framework.
  * 
  * @author Thomas Risberg
  * @author Graeme Rocher
  * @author Oliver Gierke
+ * @author Randy Watler
+ * @author Thomas Darimont
  * @since 1.0
  */
 public abstract class MongoDbUtils {
 
-	private static final Log LOGGER = LogFactory.getLog(MongoDbUtils.class);
+	private static final Logger LOGGER = LoggerFactory.getLogger(MongoDbUtils.class);
 
 	/**
 	 * Private constructor to prevent instantiation.
@@ -48,74 +50,102 @@ public abstract class MongoDbUtils {
 	/**
 	 * Obtains a {@link DB} connection for the given {@link Mongo} instance and database name
 	 * 
-	 * @param mongo The {@link Mongo} instance
-	 * @param databaseName The database name
-	 * @return The {@link DB} connection
+	 * @param mongo the {@link Mongo} instance, must not be {@literal null}.
+	 * @param databaseName the database name, must not be {@literal null} or empty.
+	 * @return the {@link DB} connection
 	 */
 	public static DB getDB(Mongo mongo, String databaseName) {
-		return doGetDB(mongo, databaseName, null, null, true);
+		return doGetDB(mongo, databaseName, UserCredentials.NO_CREDENTIALS, true, databaseName);
 	}
 
 	/**
 	 * Obtains a {@link DB} connection for the given {@link Mongo} instance and database name
 	 * 
-	 * @param mongo The {@link Mongo} instance
-	 * @param databaseName The database name
-	 * @param username The username to authenticate with
-	 * @param password The password to authenticate with
-	 * @return The {@link DB} connection
+	 * @param mongo the {@link Mongo} instance, must not be {@literal null}.
+	 * @param databaseName the database name, must not be {@literal null} or empty.
+	 * @param credentials the credentials to use, must not be {@literal null}.
+	 * @return the {@link DB} connection
 	 */
-	public static DB getDB(Mongo mongo, String databaseName, String username, char[] password) {
-		return doGetDB(mongo, databaseName, username, password, true);
+	public static DB getDB(Mongo mongo, String databaseName, UserCredentials credentials) {
+		return getDB(mongo, databaseName, credentials, databaseName);
 	}
 
-	public static DB doGetDB(Mongo mongo, String databaseName, String username, char[] password, boolean allowCreate) {
-		Assert.notNull(mongo, "No Mongo instance specified");
+	public static DB getDB(Mongo mongo, String databaseName, UserCredentials credentials,
+			String authenticationDatabaseName) {
+
+		Assert.notNull(mongo, "No Mongo instance specified!");
+		Assert.hasText(databaseName, "Database name must be given!");
+		Assert.notNull(credentials, "Credentials must not be null, use UserCredentials.NO_CREDENTIALS!");
+		Assert.hasText(authenticationDatabaseName, "Authentication database name must not be null or empty!");
+
+		return doGetDB(mongo, databaseName, credentials, true, authenticationDatabaseName);
+	}
+
+	private static DB doGetDB(Mongo mongo, String databaseName, UserCredentials credentials, boolean allowCreate,
+			String authenticationDatabaseName) {
 
 		DbHolder dbHolder = (DbHolder) TransactionSynchronizationManager.getResource(mongo);
-		if (dbHolder != null && !dbHolder.isEmpty()) {
-			// pre-bound Mongo DB
-			DB db = null;
-			if (TransactionSynchronizationManager.isSynchronizationActive() && dbHolder.doesNotHoldNonDefaultDB()) {
-				// Spring transaction management is active ->
-				db = dbHolder.getDB();
-				if (db != null && !dbHolder.isSynchronizedWithTransaction()) {
-					LOGGER.debug("Registering Spring transaction synchronization for existing Mongo DB");
-					TransactionSynchronizationManager.registerSynchronization(new MongoSynchronization(dbHolder, mongo));
-					dbHolder.setSynchronizedWithTransaction(true);
-				}
+
+		// Do we have a populated holder and TX sync active?
+		if (dbHolder != null && !dbHolder.isEmpty() && TransactionSynchronizationManager.isSynchronizationActive()) {
+
+			DB db = dbHolder.getDB(databaseName);
+
+			// DB found but not yet synchronized
+			if (db != null && !dbHolder.isSynchronizedWithTransaction()) {
+
+				LOGGER.debug("Registering Spring transaction synchronization for existing MongoDB {}.", databaseName);
+
+				TransactionSynchronizationManager.registerSynchronization(new MongoSynchronization(dbHolder, mongo));
+				dbHolder.setSynchronizedWithTransaction(true);
 			}
+
 			if (db != null) {
 				return db;
 			}
 		}
 
-		LOGGER.trace("Getting Mongo Database name=[" + databaseName + "]");
-		DB db = mongo.getDB(databaseName);
+		// Lookup fresh database instance
+		LOGGER.debug("Getting Mongo Database name=[{}]", databaseName);
 
-		boolean credentialsGiven = username != null && password != null;
-		if (credentialsGiven && !db.isAuthenticated()) {
-			// Note, can only authenticate once against the same com.mongodb.DB object.
-			if (!db.authenticate(username, password)) {
-				throw new CannotGetMongoDbConnectionException("Failed to authenticate to database [" + databaseName
-						+ "], username = [" + username + "], password = [" + new String(password) + "]", databaseName, username,
-						password);
+		DB db = mongo.getDB(databaseName);
+		boolean credentialsGiven = credentials.hasUsername() && credentials.hasPassword();
+
+		DB authDb = databaseName.equals(authenticationDatabaseName) ? db : mongo.getDB(authenticationDatabaseName);
+
+		synchronized (authDb) {
+
+			if (credentialsGiven && !authDb.isAuthenticated()) {
+
+				String username = credentials.getUsername();
+				String password = credentials.hasPassword() ? credentials.getPassword() : null;
+
+				if (!authDb.authenticate(username, password == null ? null : password.toCharArray())) {
+					throw new CannotGetMongoDbConnectionException("Failed to authenticate to database [" + databaseName + "], "
+							+ credentials.toString(), databaseName, credentials);
+				}
 			}
 		}
 
-		// Use same Session for further Mongo actions within the transaction.
-		// Thread object will get removed by synchronization at transaction completion.
+		// TX sync active, bind new database to thread
 		if (TransactionSynchronizationManager.isSynchronizationActive()) {
-			// We're within a Spring-managed transaction, possibly from JtaTransactionManager.
-			LOGGER.debug("Registering Spring transaction synchronization for new Hibernate Session");
+
+			LOGGER.debug("Registering Spring transaction synchronization for MongoDB instance {}.", databaseName);
+
 			DbHolder holderToUse = dbHolder;
+
 			if (holderToUse == null) {
-				holderToUse = new DbHolder(db);
+				holderToUse = new DbHolder(databaseName, db);
 			} else {
-				holderToUse.addDB(db);
+				holderToUse.addDB(databaseName, db);
 			}
-			TransactionSynchronizationManager.registerSynchronization(new MongoSynchronization(holderToUse, mongo));
-			holderToUse.setSynchronizedWithTransaction(true);
+
+			// synchronize holder only if not yet synchronized
+			if (!holderToUse.isSynchronizedWithTransaction()) {
+				TransactionSynchronizationManager.registerSynchronization(new MongoSynchronization(holderToUse, mongo));
+				holderToUse.setSynchronizedWithTransaction(true);
+			}
+
 			if (holderToUse != dbHolder) {
 				TransactionSynchronizationManager.bindResource(mongo, holderToUse);
 			}
@@ -139,11 +169,12 @@ public abstract class MongoDbUtils {
 	 * @return whether the DB is transactional
 	 */
 	public static boolean isDBTransactional(DB db, Mongo mongo) {
+
 		if (mongo == null) {
 			return false;
 		}
 		DbHolder dbHolder = (DbHolder) TransactionSynchronizationManager.getResource(mongo);
-		return (dbHolder != null && dbHolder.containsDB(db));
+		return dbHolder != null && dbHolder.containsDB(db);
 	}
 
 	/**
@@ -152,6 +183,7 @@ public abstract class MongoDbUtils {
 	 * @param db the DB to close (may be <code>null</code>)
 	 */
 	public static void closeDB(DB db) {
+
 		if (db != null) {
 			LOGGER.debug("Closing Mongo DB object");
 			try {

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoExceptionTranslator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2011 the original author or authors.
+ * Copyright 2010-2013 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,12 +15,6 @@
  */
 package org.springframework.data.mongodb.core;
 
-import com.mongodb.MongoException;
-import com.mongodb.MongoException.CursorNotFound;
-import com.mongodb.MongoException.DuplicateKey;
-import com.mongodb.MongoException.Network;
-import com.mongodb.MongoInternalException;
-
 import org.springframework.dao.DataAccessException;
 import org.springframework.dao.DataAccessResourceFailureException;
 import org.springframework.dao.DuplicateKeyException;
@@ -29,37 +23,63 @@ import org.springframework.dao.InvalidDataAccessResourceUsageException;
 import org.springframework.dao.support.PersistenceExceptionTranslator;
 import org.springframework.data.mongodb.UncategorizedMongoDbException;
 
+import com.mongodb.MongoCursorNotFoundException;
+import com.mongodb.MongoException;
+import com.mongodb.MongoException.CursorNotFound;
+import com.mongodb.MongoException.DuplicateKey;
+import com.mongodb.MongoException.Network;
+import com.mongodb.MongoInternalException;
+import com.mongodb.MongoServerSelectionException;
+import com.mongodb.MongoSocketException;
+import com.mongodb.MongoTimeoutException;
+
 /**
  * Simple {@link PersistenceExceptionTranslator} for Mongo. Convert the given runtime exception to an appropriate
  * exception from the {@code org.springframework.dao} hierarchy. Return {@literal null} if no translation is
  * appropriate: any other exception may have resulted from user code, and should not be translated.
  * 
  * @author Oliver Gierke
+ * @author Michal Vich
  */
 public class MongoExceptionTranslator implements PersistenceExceptionTranslator {
 
 	/*
-	  * (non-Javadoc)
-	  *
-	  * @see org.springframework.dao.support.PersistenceExceptionTranslator#
-	  * translateExceptionIfPossible(java.lang.RuntimeException)
-	  */
+	 * (non-Javadoc)
+	 * @see org.springframework.dao.support.PersistenceExceptionTranslator#translateExceptionIfPossible(java.lang.RuntimeException)
+	 */
 	public DataAccessException translateExceptionIfPossible(RuntimeException ex) {
 
 		// Check for well-known MongoException subclasses.
 
-		// All other MongoExceptions
-		if (ex instanceof DuplicateKey) {
+		if (ex instanceof DuplicateKey || ex instanceof DuplicateKeyException) {
 			return new DuplicateKeyException(ex.getMessage(), ex);
 		}
-		if (ex instanceof Network) {
+
+		if (ex instanceof Network || ex instanceof MongoSocketException) {
 			return new DataAccessResourceFailureException(ex.getMessage(), ex);
 		}
-		if (ex instanceof CursorNotFound) {
+
+		if (ex instanceof CursorNotFound || ex instanceof MongoCursorNotFoundException) {
 			return new DataAccessResourceFailureException(ex.getMessage(), ex);
 		}
+
+		if (ex instanceof MongoServerSelectionException) {
+			return new DataAccessResourceFailureException(ex.getMessage(), ex);
+		}
+
+		if (ex instanceof MongoTimeoutException) {
+			return new DataAccessResourceFailureException(ex.getMessage(), ex);
+		}
+
+		if (ex instanceof MongoInternalException) {
+			return new InvalidDataAccessResourceUsageException(ex.getMessage(), ex);
+		}
+
+		// All other MongoExceptions
 		if (ex instanceof MongoException) {
+
 			int code = ((MongoException) ex).getCode();
+
 			if (code == 11000 || code == 11001) {
 				throw new DuplicateKeyException(ex.getMessage(), ex);
 			} else if (code == 12000 || code == 13440) {
@@ -69,9 +89,6 @@ public class MongoExceptionTranslator implements PersistenceExceptionTranslator
 			}
 			return new UncategorizedMongoDbException(ex.getMessage(), ex);
 		}
-		if (ex instanceof MongoInternalException) {
-			return new InvalidDataAccessResourceUsageException(ex.getMessage(), ex);
-		}
 
 		// If we get here, we have an exception that resulted from user code,
 		// rather than the persistence provider, so we return null to indicate

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoFactoryBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2011 the original author or authors.
+ * Copyright 2010-2013 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,17 +13,21 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package org.springframework.data.mongodb.core;
 
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
 import java.util.List;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
+import org.springframework.beans.factory.DisposableBean;
 import org.springframework.beans.factory.FactoryBean;
+import org.springframework.beans.factory.InitializingBean;
 import org.springframework.dao.DataAccessException;
 import org.springframework.dao.support.PersistenceExceptionTranslator;
 import org.springframework.data.mongodb.CannotGetMongoDbConnectionException;
+import org.springframework.util.StringUtils;
+
 import com.mongodb.Mongo;
 import com.mongodb.MongoOptions;
 import com.mongodb.ServerAddress;
@@ -35,14 +39,13 @@ import com.mongodb.WriteConcern;
  * @author Thomas Risberg
  * @author Graeme Rocher
  * @author Oliver Gierke
+ * @author Thomas Darimont
  * @since 1.0
  */
-public class MongoFactoryBean implements FactoryBean<Mongo>, PersistenceExceptionTranslator {
+public class MongoFactoryBean implements FactoryBean<Mongo>, InitializingBean, DisposableBean,
+		PersistenceExceptionTranslator {
 
-	/**
-	 * Logger, available to subclasses.
-	 */
-	protected final Log logger = LogFactory.getLog(getClass());
+	private Mongo mongo;
 
 	private MongoOptions mongoOptions;
 	private String host;
@@ -57,12 +60,39 @@ public class MongoFactoryBean implements FactoryBean<Mongo>, PersistenceExceptio
 		this.mongoOptions = mongoOptions;
 	}
 
-	public void setReplicaSetSeeds(List<ServerAddress> replicaSetSeeds) {
-		this.replicaSetSeeds = replicaSetSeeds;
+	public void setReplicaSetSeeds(ServerAddress[] replicaSetSeeds) {
+		this.replicaSetSeeds = filterNonNullElementsAsList(replicaSetSeeds);
 	}
 
-	public void setReplicaPair(List<ServerAddress> replicaPair) {
-		this.replicaPair = replicaPair;
+	/**
+	 * @deprecated use {@link #setReplicaSetSeeds(ServerAddress[])} instead
+	 * 
+	 * @param replicaPair
+	 */
+	@Deprecated
+	public void setReplicaPair(ServerAddress[] replicaPair) {
+		this.replicaPair = filterNonNullElementsAsList(replicaPair);
+	}
+
+	/**
+	 * @param elements the elements to filter <T>
+	 * @return a new unmodifiable {@link List#} from the given elements without nulls
+	 */
+	private <T> List<T> filterNonNullElementsAsList(T[] elements) {
+
+		if (elements == null) {
+			return Collections.emptyList();
+		}
+
+		List<T> candidateElements = new ArrayList<T>();
+
+		for (T element : elements) {
+			if (element != null) {
+				candidateElements.add(element);
+			}
+		}
+
+		return Collections.unmodifiableList(candidateElements);
 	}
 
 	public void setHost(String host) {
@@ -87,34 +117,7 @@ public class MongoFactoryBean implements FactoryBean<Mongo>, PersistenceExceptio
 	}
 
 	public Mongo getObject() throws Exception {
-
-		Mongo mongo;
-
-		ServerAddress defaultOptions = new ServerAddress();
-
-		if (mongoOptions == null) {
-			mongoOptions = new MongoOptions();
-		}
-
-		if (replicaPair != null) {
-			if (replicaPair.size() < 2) {
-				throw new CannotGetMongoDbConnectionException("A replica pair must have two server entries");
-			}
-			mongo = new Mongo(replicaPair.get(0), replicaPair.get(1), mongoOptions);
-		} else if (replicaSetSeeds != null) {
-			mongo = new Mongo(replicaSetSeeds, mongoOptions);
-		} else {
-			String mongoHost = host != null ? host : defaultOptions.getHost();
-			mongo = port != null ? new Mongo(new ServerAddress(mongoHost, port), mongoOptions) : new Mongo(mongoHost,
-					mongoOptions);
-		}
-
-		if (writeConcern != null) {
-			mongo.setWriteConcern(writeConcern);
-		}
-
 		return mongo;
-
 	}
 
 	/*
@@ -140,4 +143,50 @@ public class MongoFactoryBean implements FactoryBean<Mongo>, PersistenceExceptio
 	public DataAccessException translateExceptionIfPossible(RuntimeException ex) {
 		return exceptionTranslator.translateExceptionIfPossible(ex);
 	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet()
+	 */
+	@SuppressWarnings("deprecation")
+	public void afterPropertiesSet() throws Exception {
+
+		Mongo mongo;
+		ServerAddress defaultOptions = new ServerAddress();
+
+		if (mongoOptions == null) {
+			mongoOptions = new MongoOptions();
+		}
+
+		if (!isNullOrEmpty(replicaPair)) {
+			if (replicaPair.size() < 2) {
+				throw new CannotGetMongoDbConnectionException("A replica pair must have two server entries");
+			}
+			mongo = new Mongo(replicaPair.get(0), replicaPair.get(1), mongoOptions);
+		} else if (!isNullOrEmpty(replicaSetSeeds)) {
+			mongo = new Mongo(replicaSetSeeds, mongoOptions);
+		} else {
+			String mongoHost = StringUtils.hasText(host) ? host : defaultOptions.getHost();
+			mongo = port != null ? new Mongo(new ServerAddress(mongoHost, port), mongoOptions) : new Mongo(mongoHost,
+					mongoOptions);
+		}
+
+		if (writeConcern != null) {
+			mongo.setWriteConcern(writeConcern);
+		}
+
+		this.mongo = mongo;
+	}
+
+	private boolean isNullOrEmpty(Collection<?> elements) {
+		return elements == null || elements.isEmpty();
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.DisposableBean#destroy()
+	 */
+	public void destroy() throws Exception {
+		this.mongo.close();
+	}
 }

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoOperations.java

@@ -1,6 +1,6 @@
 /*
- * Copyright 2010-2011 the original author or authors.
- *
+ * Copyright 2011-2014 the original author or authors.
+ * 
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -19,21 +19,26 @@ import java.util.Collection;
 import java.util.List;
 import java.util.Set;
 
+import org.springframework.data.mongodb.core.aggregation.Aggregation;
+import org.springframework.data.mongodb.core.aggregation.AggregationResults;
+import org.springframework.data.mongodb.core.aggregation.TypedAggregation;
+import org.springframework.data.mongodb.core.convert.MongoConverter;
+import org.springframework.data.mongodb.core.geo.GeoResults;
+import org.springframework.data.mongodb.core.mapreduce.GroupBy;
+import org.springframework.data.mongodb.core.mapreduce.GroupByResults;
+import org.springframework.data.mongodb.core.mapreduce.MapReduceOptions;
+import org.springframework.data.mongodb.core.mapreduce.MapReduceResults;
+import org.springframework.data.mongodb.core.query.BasicQuery;
+import org.springframework.data.mongodb.core.query.Criteria;
+import org.springframework.data.mongodb.core.query.NearQuery;
+import org.springframework.data.mongodb.core.query.Query;
+import org.springframework.data.mongodb.core.query.Update;
+
 import com.mongodb.CommandResult;
 import com.mongodb.DBCollection;
 import com.mongodb.DBObject;
 import com.mongodb.WriteResult;
 
-import org.springframework.data.mongodb.core.convert.MongoConverter;
-import org.springframework.data.mongodb.core.geo.GeoResult;
-import org.springframework.data.mongodb.core.geo.GeoResults;
-import org.springframework.data.mongodb.core.index.IndexDefinition;
-import org.springframework.data.mongodb.core.mapreduce.MapReduceOptions;
-import org.springframework.data.mongodb.core.mapreduce.MapReduceResults;
-import org.springframework.data.mongodb.core.query.NearQuery;
-import org.springframework.data.mongodb.core.query.Query;
-import org.springframework.data.mongodb.core.query.Update;
-
 /**
  * Interface that specifies a basic set of MongoDB operations. Implemented by {@link MongoTemplate}. Not often used but
  * a useful option for extensibility and testability (as it can be easily mocked, stubbed, or be the target of a JDK
@@ -42,12 +47,18 @@ import org.springframework.data.mongodb.core.query.Update;
  * @author Thomas Risberg
  * @author Mark Pollack
  * @author Oliver Gierke
+ * @author Tobias Trelle
+ * @author Chuong Ngo
+ * @author Christoph Strobl
+ * @author Thomas Darimont
  */
+@SuppressWarnings("deprecation")
 public interface MongoOperations {
 
 	/**
 	 * The collection name used for the specified class by this template.
 	 * 
+	 * @param entityClass must not be {@literal null}.
 	 * @return
 	 */
 	String getCollectionName(Class<?> entityClass);
@@ -68,7 +79,7 @@ public interface MongoOperations {
 	 * @param command a MongoDB command
 	 */
 	CommandResult executeCommand(DBObject command);
-	
+
 	/**
 	 * Execute a MongoDB command. Any errors that result from executing this command will be converted into Spring's DAO
 	 * exception hierarchy.
@@ -77,7 +88,7 @@ public interface MongoOperations {
 	 * @param options query options to use
 	 */
 	CommandResult executeCommand(DBObject command, int options);
-	
+
 	/**
 	 * Execute a MongoDB query and iterate over the query results on a per-document basis with a DocumentCallbackHandler.
 	 * 
@@ -87,18 +98,6 @@ public interface MongoOperations {
 	 * @param dch the handler that will extract results, one document at a time
 	 */
 	void executeQuery(Query query, String collectionName, DocumentCallbackHandler dch);
-	
-	/**
-	 * Execute a MongoDB query and iterate over the query results on a per-document basis with a DocumentCallbackHandler using the
-	 * provided CursorPreparer.
-	 * @param query the query class that specifies the criteria used to find a record and also an optional fields
-	 *          specification
-	 * @param collectionName name of the collection to retrieve the objects from
-	 * @param dch the handler that will extract results, one document at a time
-	 * @param preparer allows for customization of the DBCursor used when iterating over the result set, (apply limits,
-	 *          skips and so on).
-	 */
-	void executeQuery(Query query, String collectionName, DocumentCallbackHandler dch, CursorPreparer preparer);
 
 	/**
 	 * Executes a {@link DbCallback} translating any exceptions as necessary.
@@ -237,11 +236,25 @@ public interface MongoOperations {
 	 */
 	void dropCollection(String collectionName);
 
+	/**
+	 * Returns the operations that can be performed on indexes
+	 * 
+	 * @return index operations on the named collection
+	 */
+	IndexOperations indexOps(String collectionName);
+
+	/**
+	 * Returns the operations that can be performed on indexes
+	 * 
+	 * @return index operations on the named collection associated with the given entity class
+	 */
+	IndexOperations indexOps(Class<?> entityClass);
+
 	/**
 	 * Query for a list of objects of type T from the collection used by the entity class.
 	 * <p/>
 	 * The object is converted from the MongoDB native representation using an instance of {@see MongoConverter}. Unless
-	 * configured otherwise, an instance of SimpleMongoConverter will be used.
+	 * configured otherwise, an instance of MappingMongoConverter will be used.
 	 * <p/>
 	 * If your collection does not contain a homogeneous collection of types, this operation will not be an efficient way
 	 * to map objects since the test for class type is done in the client and not on the server.
@@ -255,7 +268,7 @@ public interface MongoOperations {
 	 * Query for a list of objects of type T from the specified collection.
 	 * <p/>
 	 * The object is converted from the MongoDB native representation using an instance of {@see MongoConverter}. Unless
-	 * configured otherwise, an instance of SimpleMongoConverter will be used.
+	 * configured otherwise, an instance of MappingMongoConverter will be used.
 	 * <p/>
 	 * If your collection does not contain a homogeneous collection of types, this operation will not be an efficient way
 	 * to map objects since the test for class type is done in the client and not on the server.
@@ -265,11 +278,90 @@ public interface MongoOperations {
 	 * @return the converted collection
 	 */
 	<T> List<T> findAll(Class<T> entityClass, String collectionName);
-	
-	
-	
+
 	/**
-	 * Execute a map-reduce operation.  The map-reduce operation will be formed with an output type of INLINE
+	 * Execute a group operation over the entire collection. The group operation entity class should match the 'shape' of
+	 * the returned object that takes int account the initial document structure as well as any finalize functions.
+	 * 
+	 * @param criteria The criteria that restricts the row that are considered for grouping. If not specified all rows are
+	 *          considered.
+	 * @param inputCollectionName the collection where the group operation will read from
+	 * @param groupBy the conditions under which the group operation will be performed, e.g. keys, initial document,
+	 *          reduce function.
+	 * @param entityClass The parameterized type of the returned list
+	 * @return The results of the group operation
+	 */
+	<T> GroupByResults<T> group(String inputCollectionName, GroupBy groupBy, Class<T> entityClass);
+
+	/**
+	 * Execute a group operation restricting the rows to those which match the provided Criteria. The group operation
+	 * entity class should match the 'shape' of the returned object that takes int account the initial document structure
+	 * as well as any finalize functions.
+	 * 
+	 * @param criteria The criteria that restricts the row that are considered for grouping. If not specified all rows are
+	 *          considered.
+	 * @param inputCollectionName the collection where the group operation will read from
+	 * @param groupBy the conditions under which the group operation will be performed, e.g. keys, initial document,
+	 *          reduce function.
+	 * @param entityClass The parameterized type of the returned list
+	 * @return The results of the group operation
+	 */
+	<T> GroupByResults<T> group(Criteria criteria, String inputCollectionName, GroupBy groupBy, Class<T> entityClass);
+
+	/**
+	 * Execute an aggregation operation. The raw results will be mapped to the given entity class. The name of the
+	 * inputCollection is derived from the inputType of the aggregation.
+	 * 
+	 * @param aggregation The {@link TypedAggregation} specification holding the aggregation operations, must not be
+	 *          {@literal null}.
+	 * @param collectionName The name of the input collection to use for the aggreation.
+	 * @param outputType The parameterized type of the returned list, must not be {@literal null}.
+	 * @return The results of the aggregation operation.
+	 * @since 1.3
+	 */
+	<O> AggregationResults<O> aggregate(TypedAggregation<?> aggregation, String collectionName, Class<O> outputType);
+
+	/**
+	 * Execute an aggregation operation. The raw results will be mapped to the given entity class. The name of the
+	 * inputCollection is derived from the inputType of the aggregation.
+	 * 
+	 * @param aggregation The {@link TypedAggregation} specification holding the aggregation operations, must not be
+	 *          {@literal null}.
+	 * @param outputType The parameterized type of the returned list, must not be {@literal null}.
+	 * @return The results of the aggregation operation.
+	 * @since 1.3
+	 */
+	<O> AggregationResults<O> aggregate(TypedAggregation<?> aggregation, Class<O> outputType);
+
+	/**
+	 * Execute an aggregation operation. The raw results will be mapped to the given entity class.
+	 * 
+	 * @param aggregation The {@link Aggregation} specification holding the aggregation operations, must not be
+	 *          {@literal null}.
+	 * @param inputType the inputType where the aggregation operation will read from, must not be {@literal null} or
+	 *          empty.
+	 * @param outputType The parameterized type of the returned list, must not be {@literal null}.
+	 * @return The results of the aggregation operation.
+	 * @since 1.3
+	 */
+	<O> AggregationResults<O> aggregate(Aggregation aggregation, Class<?> inputType, Class<O> outputType);
+
+	/**
+	 * Execute an aggregation operation. The raw results will be mapped to the given entity class.
+	 * 
+	 * @param aggregation The {@link Aggregation} specification holding the aggregation operations, must not be
+	 *          {@literal null}.
+	 * @param collectionName the collection where the aggregation operation will read from, must not be {@literal null} or
+	 *          empty.
+	 * @param outputType The parameterized type of the returned list, must not be {@literal null}.
+	 * @return The results of the aggregation operation.
+	 * @since 1.3
+	 */
+	<O> AggregationResults<O> aggregate(Aggregation aggregation, String collectionName, Class<O> outputType);
+
+	/**
+	 * Execute a map-reduce operation. The map-reduce operation will be formed with an output type of INLINE
+	 * 
 	 * @param inputCollectionName the collection where the map-reduce will read from
 	 * @param mapFunction The JavaScript map function
 	 * @param reduceFunction The JavaScript reduce function
@@ -277,11 +369,12 @@ public interface MongoOperations {
 	 * @param entityClass The parameterized type of the returned list
 	 * @return The results of the map reduce operation
 	 */
-	<T> MapReduceResults<T> mapReduce(String inputCollectionName, String mapFunction, String reduceFunction, Class<T> entityClass );
+	<T> MapReduceResults<T> mapReduce(String inputCollectionName, String mapFunction, String reduceFunction,
+			Class<T> entityClass);
 
-	
 	/**
 	 * Execute a map-reduce operation that takes additional map-reduce options.
+	 * 
 	 * @param inputCollectionName the collection where the map-reduce will read from
 	 * @param mapFunction The JavaScript map function
 	 * @param reduceFunction The JavaScript reduce function
@@ -289,36 +382,40 @@ public interface MongoOperations {
 	 * @param entityClass The parameterized type of the returned list
 	 * @return The results of the map reduce operation
 	 */
-	<T> MapReduceResults<T> mapReduce(String inputCollectionName, String mapFunction, String reduceFunction, MapReduceOptions mapReduceOptions, Class<T> entityClass );
-	
-	
-	
-	/**
-	 * Execute a map-reduce operation that takes a query.  The map-reduce operation will be formed with an output type of INLINE
-	 * @param query The query to use to select the data for the map phase
-	 * @param inputCollectionName the collection where the map-reduce will read from
-	 * @param mapFunction The JavaScript map function
-	 * @param reduceFunction The JavaScript reduce function
-	 * @param mapReduceOptions Options that specify detailed map-reduce behavior
-	 * @param entityClass The parameterized type of the returned list
-	 * @return The results of the map reduce operation
-	 */
-	<T> MapReduceResults<T> mapReduce(Query query, String inputCollectionName, String mapFunction, String reduceFunction, Class<T> entityClass );
-	
-	/**
-	 * Execute a map-reduce operation that takes a query and additional map-reduce options
-	 * @param query The query to use to select the data for the map phase
-	 * @param inputCollectionName the collection where the map-reduce will read from
-	 * @param mapFunction The JavaScript map function
-	 * @param reduceFunction The JavaScript reduce function
-	 * @param mapReduceOptions Options that specify detailed map-reduce behavior
-	 * @param entityClass The parameterized type of the returned list
-	 * @return The results of the map reduce operation
-	 */
-	<T> MapReduceResults<T> mapReduce(Query query,  String inputCollectionName, String mapFunction, String reduceFunction, MapReduceOptions mapReduceOptions, Class<T> entityClass );
+	<T> MapReduceResults<T> mapReduce(String inputCollectionName, String mapFunction, String reduceFunction,
+			MapReduceOptions mapReduceOptions, Class<T> entityClass);
 
 	/**
-	 * Returns {@link GeoResult} for all entities matching the given {@link NearQuery}. Will consider entity mapping
+	 * Execute a map-reduce operation that takes a query. The map-reduce operation will be formed with an output type of
+	 * INLINE
+	 * 
+	 * @param query The query to use to select the data for the map phase
+	 * @param inputCollectionName the collection where the map-reduce will read from
+	 * @param mapFunction The JavaScript map function
+	 * @param reduceFunction The JavaScript reduce function
+	 * @param mapReduceOptions Options that specify detailed map-reduce behavior
+	 * @param entityClass The parameterized type of the returned list
+	 * @return The results of the map reduce operation
+	 */
+	<T> MapReduceResults<T> mapReduce(Query query, String inputCollectionName, String mapFunction, String reduceFunction,
+			Class<T> entityClass);
+
+	/**
+	 * Execute a map-reduce operation that takes a query and additional map-reduce options
+	 * 
+	 * @param query The query to use to select the data for the map phase
+	 * @param inputCollectionName the collection where the map-reduce will read from
+	 * @param mapFunction The JavaScript map function
+	 * @param reduceFunction The JavaScript reduce function
+	 * @param mapReduceOptions Options that specify detailed map-reduce behavior
+	 * @param entityClass The parameterized type of the returned list
+	 * @return The results of the map reduce operation
+	 */
+	<T> MapReduceResults<T> mapReduce(Query query, String inputCollectionName, String mapFunction, String reduceFunction,
+			MapReduceOptions mapReduceOptions, Class<T> entityClass);
+
+	/**
+	 * Returns {@link GeoResults} for all entities matching the given {@link NearQuery}. Will consider entity mapping
 	 * information to determine the collection the query is ran against.
 	 * 
 	 * @param near must not be {@literal null}.
@@ -328,7 +425,7 @@ public interface MongoOperations {
 	<T> GeoResults<T> geoNear(NearQuery near, Class<T> entityClass);
 
 	/**
-	 * Returns {@link GeoResult} for all entities matching the given {@link NearQuery}.
+	 * Returns {@link GeoResults} for all entities matching the given {@link NearQuery}.
 	 * 
 	 * @param near must not be {@literal null}.
 	 * @param entityClass must not be {@literal null}.
@@ -338,29 +435,12 @@ public interface MongoOperations {
 	 */
 	<T> GeoResults<T> geoNear(NearQuery near, Class<T> entityClass, String collectionName);
 
-	/**
-	 * Ensure that an index for the provided {@link IndexDefinition} exists for the collection indicated by the entity
-	 * class. If not it will be created.
-	 * 
-	 * @param indexDefinition
-	 * @param entityClass class that determines the collection to use
-	 */
-	void ensureIndex(IndexDefinition indexDefinition, Class<?> entityClass);
-
-	/**
-	 * Ensure that an index for the provided {@link IndexDefinition} exists. If not it will be created.
-	 * 
-	 * @param index
-	 * @param collectionName
-	 */
-	void ensureIndex(IndexDefinition indexDefinition, String collectionName);
-
 	/**
 	 * Map the results of an ad-hoc query on the collection for the entity class to a single instance of an object of the
 	 * specified type.
 	 * <p/>
 	 * The object is converted from the MongoDB native representation using an instance of {@see MongoConverter}. Unless
-	 * configured otherwise, an instance of SimpleMongoConverter will be used.
+	 * configured otherwise, an instance of MappingMongoConverter will be used.
 	 * <p/>
 	 * The query is specified as a {@link Query} which can be created either using the {@link BasicQuery} or the more
 	 * feature rich {@link Query}.
@@ -377,7 +457,7 @@ public interface MongoOperations {
 	 * type.
 	 * <p/>
 	 * The object is converted from the MongoDB native representation using an instance of {@see MongoConverter}. Unless
-	 * configured otherwise, an instance of SimpleMongoConverter will be used.
+	 * configured otherwise, an instance of MappingMongoConverter will be used.
 	 * <p/>
 	 * The query is specified as a {@link Query} which can be created either using the {@link BasicQuery} or the more
 	 * feature rich {@link Query}.
@@ -386,16 +466,43 @@ public interface MongoOperations {
 	 *          specification
 	 * @param entityClass the parameterized type of the returned list.
 	 * @param collectionName name of the collection to retrieve the objects from
-	 * 
 	 * @return the converted object
 	 */
 	<T> T findOne(Query query, Class<T> entityClass, String collectionName);
 
+	/**
+	 * Determine result of given {@link Query} contains at least one element.
+	 * 
+	 * @param query the {@link Query} class that specifies the criteria used to find a record.
+	 * @param collectionName name of the collection to check for objects.
+	 * @return
+	 */
+	boolean exists(Query query, String collectionName);
+
+	/**
+	 * Determine result of given {@link Query} contains at least one element.
+	 * 
+	 * @param query the {@link Query} class that specifies the criteria used to find a record.
+	 * @param entityClass the parameterized type.
+	 * @return
+	 */
+	boolean exists(Query query, Class<?> entityClass);
+
+	/**
+	 * Determine result of given {@link Query} contains at least one element.
+	 * 
+	 * @param query the {@link Query} class that specifies the criteria used to find a record.
+	 * @param entityClass the parameterized type.
+	 * @param collectionName name of the collection to check for objects.
+	 * @return
+	 */
+	boolean exists(Query query, Class<?> entityClass, String collectionName);
+
 	/**
 	 * Map the results of an ad-hoc query on the collection for the entity class to a List of the specified type.
 	 * <p/>
 	 * The object is converted from the MongoDB native representation using an instance of {@see MongoConverter}. Unless
-	 * configured otherwise, an instance of SimpleMongoConverter will be used.
+	 * configured otherwise, an instance of MappingMongoConverter will be used.
 	 * <p/>
 	 * The query is specified as a {@link Query} which can be created either using the {@link BasicQuery} or the more
 	 * feature rich {@link Query}.
@@ -411,7 +518,7 @@ public interface MongoOperations {
 	 * Map the results of an ad-hoc query on the specified collection to a List of the specified type.
 	 * <p/>
 	 * The object is converted from the MongoDB native representation using an instance of {@see MongoConverter}. Unless
-	 * configured otherwise, an instance of SimpleMongoConverter will be used.
+	 * configured otherwise, an instance of MappingMongoConverter will be used.
 	 * <p/>
 	 * The query is specified as a {@link Query} which can be created either using the {@link BasicQuery} or the more
 	 * feature rich {@link Query}.
@@ -420,31 +527,10 @@ public interface MongoOperations {
 	 *          specification
 	 * @param entityClass the parameterized type of the returned list.
 	 * @param collectionName name of the collection to retrieve the objects from
-	 * 
 	 * @return the List of converted objects
 	 */
 	<T> List<T> find(Query query, Class<T> entityClass, String collectionName);
 
-	/**
-	 * Map the results of an ad-hoc query on the specified collection to a List of the specified type.
-	 * <p/>
-	 * The object is converted from the MongoDB native representation using an instance of {@see MongoConverter}. Unless
-	 * configured otherwise, an instance of SimpleMongoConverter will be used.
-	 * <p/>
-	 * The query is specified as a {@link Query} which can be created either using the {@link BasicQuery} or the more
-	 * feature rich {@link Query}.
-	 * 
-	 * @param query the query class that specifies the criteria used to find a record and also an optional fields
-	 *          specification
-	 * @param entityClass the parameterized type of the returned list.
-	 * @param preparer allows for customization of the DBCursor used when iterating over the result set, (apply limits,
-	 *          skips and so on).
-	 * @param collectionName name of the collection to retrieve the objects from
-	 * 
-	 * @return the List of converted objects.
-	 */
-	<T> List<T> find(Query query, Class<T> entityClass, CursorPreparer preparer, String collectionName);
-
 	/**
 	 * Returns a document with the given id mapped onto the given class. The collection the query is ran against will be
 	 * derived from the given target class as well.
@@ -462,12 +548,66 @@ public interface MongoOperations {
 	 * @param id the id of the document to return
 	 * @param entityClass the type to convert the document to
 	 * @param collectionName the collection to query for the document
-	 * 
 	 * @param <T>
 	 * @return
 	 */
 	<T> T findById(Object id, Class<T> entityClass, String collectionName);
 
+	/**
+	 * Triggers <a href="http://docs.mongodb.org/manual/reference/method/db.collection.findAndModify/">findAndModify<a/>
+	 * to apply provided {@link Update} on documents matching {@link Criteria} of given {@link Query}.
+	 * 
+	 * @param query the {@link Query} class that specifies the {@link Criteria} used to find a record and also an optional
+	 *          fields specification.
+	 * @param update the {@link Update} to apply on matching documents.
+	 * @param entityClass the parameterized type.
+	 * @return
+	 */
+	<T> T findAndModify(Query query, Update update, Class<T> entityClass);
+
+	/**
+	 * Triggers <a href="http://docs.mongodb.org/manual/reference/method/db.collection.findAndModify/">findAndModify<a/>
+	 * to apply provided {@link Update} on documents matching {@link Criteria} of given {@link Query}.
+	 * 
+	 * @param query the {@link Query} class that specifies the {@link Criteria} used to find a record and also an optional
+	 *          fields specification.
+	 * @param update the {@link Update} to apply on matching documents.
+	 * @param entityClass the parameterized type.
+	 * @param collectionName the collection to query.
+	 * @return
+	 */
+	<T> T findAndModify(Query query, Update update, Class<T> entityClass, String collectionName);
+
+	/**
+	 * Triggers <a href="http://docs.mongodb.org/manual/reference/method/db.collection.findAndModify/">findAndModify<a/>
+	 * to apply provided {@link Update} on documents matching {@link Criteria} of given {@link Query} taking
+	 * {@link FindAndModifyOptions} into account.
+	 * 
+	 * @param query the {@link Query} class that specifies the {@link Criteria} used to find a record and also an optional
+	 *          fields specification.
+	 * @param update the {@link Update} to apply on matching documents.
+	 * @param options the {@link FindAndModifyOptions} holding additional information.
+	 * @param entityClass the parameterized type.
+	 * @return
+	 */
+	<T> T findAndModify(Query query, Update update, FindAndModifyOptions options, Class<T> entityClass);
+
+	/**
+	 * Triggers <a href="http://docs.mongodb.org/manual/reference/method/db.collection.findAndModify/">findAndModify<a/>
+	 * to apply provided {@link Update} on documents matching {@link Criteria} of given {@link Query} taking
+	 * {@link FindAndModifyOptions} into account.
+	 * 
+	 * @param query the {@link Query} class that specifies the {@link Criteria} used to find a record and also an optional
+	 *          fields specification.
+	 * @param update the {@link Update} to apply on matching documents.
+	 * @param options the {@link FindAndModifyOptions} holding additional information.
+	 * @param entityClass the parameterized type.
+	 * @param collectionName the collection to query.
+	 * @return
+	 */
+	<T> T findAndModify(Query query, Update update, FindAndModifyOptions options, Class<T> entityClass,
+			String collectionName);
+
 	/**
 	 * Map the results of an ad-hoc query on the collection for the entity type to a single instance of an object of the
 	 * specified type. The first document that matches the query is returned and also removed from the collection in the
@@ -490,7 +630,7 @@ public interface MongoOperations {
 	 * type. The first document that matches the query is returned and also removed from the collection in the database.
 	 * <p/>
 	 * The object is converted from the MongoDB native representation using an instance of {@see MongoConverter}. Unless
-	 * configured otherwise, an instance of SimpleMongoConverter will be used.
+	 * configured otherwise, an instance of MappingMongoConverter will be used.
 	 * <p/>
 	 * The query is specified as a {@link Query} which can be created either using the {@link BasicQuery} or the more
 	 * feature rich {@link Query}.
@@ -499,7 +639,6 @@ public interface MongoOperations {
 	 *          specification
 	 * @param entityClass the parameterized type of the returned list.
 	 * @param collectionName name of the collection to retrieve the objects from
-	 * 
 	 * @return the converted object
 	 */
 	<T> T findAndRemove(Query query, Class<T> entityClass, String collectionName);
@@ -512,7 +651,7 @@ public interface MongoOperations {
 	 * @return
 	 */
 	long count(Query query, Class<?> entityClass);
-	
+
 	/**
 	 * Returns the number of documents for the given {@link Query} querying the given collection.
 	 * 
@@ -521,7 +660,7 @@ public interface MongoOperations {
 	 * @return
 	 */
 	long count(Query query, String collectionName);
-	
+
 	/**
 	 * Insert the object into the collection for the entity type of the object to save.
 	 * <p/>
@@ -529,9 +668,9 @@ public interface MongoOperations {
 	 * <p/>
 	 * If you object has an "Id' property, it will be set with the generated Id from MongoDB. If your Id property is a
 	 * String then MongoDB ObjectId will be used to populate that string. Otherwise, the conversion from ObjectId to your
-	 * property type will be handled by Spring's BeanWrapper class that leverages Spring 3.0's new Type Conversion API.
-	 * See <a href="http://static.springsource.org/spring/docs/3.0.x/reference/validation.html#core-convert">Spring 3 Type
-	 * Conversion"</a> for more details.
+	 * property type will be handled by Spring's BeanWrapper class that leverages Type Conversion API. See <a
+	 * href="http://docs.spring.io/spring/docs/current/spring-framework-reference/html/validation.html#core-convert"
+	 * >Spring's Type Conversion"</a> for more details.
 	 * <p/>
 	 * <p/>
 	 * Insert is used to initially store the object into the database. To update an existing object use the save method.
@@ -544,7 +683,7 @@ public interface MongoOperations {
 	 * Insert the object into the specified collection.
 	 * <p/>
 	 * The object is converted to the MongoDB native representation using an instance of {@see MongoConverter}. Unless
-	 * configured otherwise, an instance of SimpleMongoConverter will be used.
+	 * configured otherwise, an instance of MappingMongoConverter will be used.
 	 * <p/>
 	 * Insert is used to initially store the object into the database. To update an existing object use the save method.
 	 * 
@@ -582,13 +721,13 @@ public interface MongoOperations {
 	 * object is not already present, that is an 'upsert'.
 	 * <p/>
 	 * The object is converted to the MongoDB native representation using an instance of {@see MongoConverter}. Unless
-	 * configured otherwise, an instance of SimpleMongoConverter will be used.
+	 * configured otherwise, an instance of MappingMongoConverter will be used.
 	 * <p/>
 	 * If you object has an "Id' property, it will be set with the generated Id from MongoDB. If your Id property is a
 	 * String then MongoDB ObjectId will be used to populate that string. Otherwise, the conversion from ObjectId to your
-	 * property type will be handled by Spring's BeanWrapper class that leverages Spring 3.0's new Type Conversion API.
-	 * See <a href="http://static.springsource.org/spring/docs/3.0.x/reference/validation.html#core-convert">Spring 3 Type
-	 * Conversion"</a> for more details.
+	 * property type will be handled by Spring's BeanWrapper class that leverages Type Conversion API. See <a
+	 * href="http://docs.spring.io/spring/docs/current/spring-framework-reference/html/validation.html#core-convert"
+	 * >Spring's Type Conversion"</a> for more details.
 	 * 
 	 * @param objectToSave the object to store in the collection
 	 */
@@ -599,19 +738,54 @@ public interface MongoOperations {
 	 * is an 'upsert'.
 	 * <p/>
 	 * The object is converted to the MongoDB native representation using an instance of {@see MongoConverter}. Unless
-	 * configured otherwise, an instance of SimpleMongoConverter will be used.
+	 * configured otherwise, an instance of MappingMongoConverter will be used.
 	 * <p/>
 	 * If you object has an "Id' property, it will be set with the generated Id from MongoDB. If your Id property is a
 	 * String then MongoDB ObjectId will be used to populate that string. Otherwise, the conversion from ObjectId to your
-	 * property type will be handled by Spring's BeanWrapper class that leverages Spring 3.0's new Type Cobnversion API.
-	 * See <a href="http://static.springsource.org/spring/docs/3.0.x/reference/validation.html#core-convert">Spring 3 Type
-	 * Conversion"</a> for more details.
+	 * property type will be handled by Spring's BeanWrapper class that leverages Type Cobnversion API. See <a
+	 * http://docs.spring.io/spring/docs/current/spring-framework-reference/html/validation.html#core-convert">Spring's
+	 * Type Conversion"</a> for more details.
 	 * 
 	 * @param objectToSave the object to store in the collection
 	 * @param collectionName name of the collection to store the object in
 	 */
 	void save(Object objectToSave, String collectionName);
 
+	/**
+	 * Performs an upsert. If no document is found that matches the query, a new document is created and inserted by
+	 * combining the query document and the update document.
+	 * 
+	 * @param query the query document that specifies the criteria used to select a record to be upserted
+	 * @param update the update document that contains the updated object or $ operators to manipulate the existing object
+	 * @param entityClass class that determines the collection to use
+	 * @return the WriteResult which lets you access the results of the previous write.
+	 */
+	WriteResult upsert(Query query, Update update, Class<?> entityClass);
+
+	/**
+	 * Performs an upsert. If no document is found that matches the query, a new document is created and inserted by
+	 * combining the query document and the update document.
+	 * 
+	 * @param query the query document that specifies the criteria used to select a record to be updated
+	 * @param update the update document that contains the updated object or $ operators to manipulate the existing
+	 *          object.
+	 * @param collectionName name of the collection to update the object in
+	 * @return the WriteResult which lets you access the results of the previous write.
+	 */
+	WriteResult upsert(Query query, Update update, String collectionName);
+
+	/**
+	 * Performs an upsert. If no document is found that matches the query, a new document is created and inserted by
+	 * combining the query document and the update document.
+	 * 
+	 * @param query the query document that specifies the criteria used to select a record to be upserted
+	 * @param update the update document that contains the updated object or $ operators to manipulate the existing object
+	 * @param entityClass class of the pojo to be operated on
+	 * @param collectionName name of the collection to update the object in
+	 * @return the WriteResult which lets you access the results of the previous write.
+	 */
+	WriteResult upsert(Query query, Update update, Class<?> entityClass, String collectionName);
+
 	/**
 	 * Updates the first object that is found in the collection of the entity class that matches the query document with
 	 * the provided update document.
@@ -620,6 +794,7 @@ public interface MongoOperations {
 	 * @param update the update document that contains the updated object or $ operators to manipulate the existing
 	 *          object.
 	 * @param entityClass class that determines the collection to use
+	 * @return the WriteResult which lets you access the results of the previous write.
 	 */
 	WriteResult updateFirst(Query query, Update update, Class<?> entityClass);
 
@@ -631,9 +806,23 @@ public interface MongoOperations {
 	 * @param update the update document that contains the updated object or $ operators to manipulate the existing
 	 *          object.
 	 * @param collectionName name of the collection to update the object in
+	 * @return the WriteResult which lets you access the results of the previous write.
 	 */
 	WriteResult updateFirst(Query query, Update update, String collectionName);
 
+	/**
+	 * Updates the first object that is found in the specified collection that matches the query document criteria with
+	 * the provided updated document.
+	 * 
+	 * @param query the query document that specifies the criteria used to select a record to be updated
+	 * @param update the update document that contains the updated object or $ operators to manipulate the existing
+	 *          object.
+	 * @param entityClass class of the pojo to be operated on
+	 * @param collectionName name of the collection to update the object in
+	 * @return the WriteResult which lets you access the results of the previous write.
+	 */
+	WriteResult updateFirst(Query query, Update update, Class<?> entityClass, String collectionName);
+
 	/**
 	 * Updates all objects that are found in the collection for the entity class that matches the query document criteria
 	 * with the provided updated document.
@@ -642,6 +831,7 @@ public interface MongoOperations {
 	 * @param update the update document that contains the updated object or $ operators to manipulate the existing
 	 *          object.
 	 * @param entityClass class that determines the collection to use
+	 * @return the WriteResult which lets you access the results of the previous write.
 	 */
 	WriteResult updateMulti(Query query, Update update, Class<?> entityClass);
 
@@ -653,33 +843,56 @@ public interface MongoOperations {
 	 * @param update the update document that contains the updated object or $ operators to manipulate the existing
 	 *          object.
 	 * @param collectionName name of the collection to update the object in
+	 * @return the WriteResult which lets you access the results of the previous write.
 	 */
 	WriteResult updateMulti(Query query, Update update, String collectionName);
 
+	/**
+	 * Updates all objects that are found in the collection for the entity class that matches the query document criteria
+	 * with the provided updated document.
+	 * 
+	 * @param query the query document that specifies the criteria used to select a record to be updated
+	 * @param update the update document that contains the updated object or $ operators to manipulate the existing
+	 *          object.
+	 * @param entityClass class of the pojo to be operated on
+	 * @param collectionName name of the collection to update the object in
+	 * @return the WriteResult which lets you access the results of the previous write.
+	 */
+	WriteResult updateMulti(final Query query, final Update update, Class<?> entityClass, String collectionName);
+
 	/**
 	 * Remove the given object from the collection by id.
 	 * 
 	 * @param object
 	 */
-	void remove(Object object);
-	
+	WriteResult remove(Object object);
+
 	/**
 	 * Removes the given object from the given collection.
 	 * 
 	 * @param object
 	 * @param collection must not be {@literal null} or empty.
 	 */
-	void remove(Object object, String collection);
+	WriteResult remove(Object object, String collection);
 
 	/**
 	 * Remove all documents that match the provided query document criteria from the the collection used to store the
 	 * entityClass. The Class parameter is also used to help convert the Id of the object if it is present in the query.
 	 * 
-	 * @param <T>
 	 * @param query
 	 * @param entityClass
 	 */
-	<T> void remove(Query query, Class<T> entityClass);
+	WriteResult remove(Query query, Class<?> entityClass);
+
+	/**
+	 * Remove all documents that match the provided query document criteria from the the collection used to store the
+	 * entityClass. The Class parameter is also used to help convert the Id of the object if it is present in the query.
+	 * 
+	 * @param query
+	 * @param entityClass
+	 * @param collectionName
+	 */
+	WriteResult remove(Query query, Class<?> entityClass, String collectionName);
 
 	/**
 	 * Remove all documents from the specified collection that match the provided query document criteria. There is no
@@ -688,7 +901,40 @@ public interface MongoOperations {
 	 * @param query the query document that specifies the criteria used to remove a record
 	 * @param collectionName name of the collection where the objects will removed
 	 */
-	void remove(Query query, String collectionName);
+	WriteResult remove(Query query, String collectionName);
+
+	/**
+	 * Returns and removes all documents form the specified collection that match the provided query.
+	 * 
+	 * @param query
+	 * @param collectionName
+	 * @return
+	 * @since 1.5
+	 */
+	<T> List<T> findAllAndRemove(Query query, String collectionName);
+
+	/**
+	 * Returns and removes all documents matching the given query form the collection used to store the entityClass.
+	 * 
+	 * @param query
+	 * @param entityClass
+	 * @return
+	 * @since 1.5
+	 */
+	<T> List<T> findAllAndRemove(Query query, Class<T> entityClass);
+
+	/**
+	 * Returns and removes all documents that match the provided query document criteria from the the collection used to
+	 * store the entityClass. The Class parameter is also used to help convert the Id of the object if it is present in
+	 * the query.
+	 * 
+	 * @param query
+	 * @param entityClass
+	 * @param collectionName
+	 * @return
+	 * @since 1.5
+	 */
+	<T> List<T> findAllAndRemove(Query query, Class<T> entityClass, String collectionName);
 
 	/**
 	 * Returns the underlying {@link MongoConverter}.
@@ -696,4 +942,4 @@ public interface MongoOperations {
 	 * @return
 	 */
 	MongoConverter getConverter();
-}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoOptionsFactoryBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2011 the original author or authors.
+ * Copyright 2010-2014 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,128 +15,92 @@
  */
 package org.springframework.data.mongodb.core;
 
-import com.mongodb.MongoOptions;
+import javax.net.ssl.SSLSocketFactory;
 
 import org.springframework.beans.factory.FactoryBean;
 import org.springframework.beans.factory.InitializingBean;
 
+import com.mongodb.MongoOptions;
+
 /**
- * A factory bean for construction of a MongoOptions instance
+ * A factory bean for construction of a {@link MongoOptions} instance.
  * 
  * @author Graeme Rocher
- * @Author Mark Pollack
+ * @author Mark Pollack
+ * @author Mike Saavedra
+ * @author Thomas Darimont
  */
+@SuppressWarnings("deprecation")
 public class MongoOptionsFactoryBean implements FactoryBean<MongoOptions>, InitializingBean {
 
-	private static final MongoOptions MONGO_OPTIONS = new MongoOptions();
-	/**
-	 * number of connections allowed per host will block if run out
-	 */
-	private int connectionsPerHost = MONGO_OPTIONS.connectionsPerHost;
+	private static final MongoOptions DEFAULT_MONGO_OPTIONS = new MongoOptions();
+
+	private int connectionsPerHost = DEFAULT_MONGO_OPTIONS.connectionsPerHost;
+	private int threadsAllowedToBlockForConnectionMultiplier = DEFAULT_MONGO_OPTIONS.threadsAllowedToBlockForConnectionMultiplier;
+	private int maxWaitTime = DEFAULT_MONGO_OPTIONS.maxWaitTime;
+	private int connectTimeout = DEFAULT_MONGO_OPTIONS.connectTimeout;
+	private int socketTimeout = DEFAULT_MONGO_OPTIONS.socketTimeout;
+	private boolean socketKeepAlive = DEFAULT_MONGO_OPTIONS.socketKeepAlive;
+	private boolean autoConnectRetry = DEFAULT_MONGO_OPTIONS.autoConnectRetry;
+	private long maxAutoConnectRetryTime = DEFAULT_MONGO_OPTIONS.maxAutoConnectRetryTime;
+	private int writeNumber = DEFAULT_MONGO_OPTIONS.w;
+	private int writeTimeout = DEFAULT_MONGO_OPTIONS.wtimeout;
+	private boolean writeFsync = DEFAULT_MONGO_OPTIONS.fsync;
+	private boolean slaveOk = DEFAULT_MONGO_OPTIONS.slaveOk;
+	private boolean ssl;
+	private SSLSocketFactory sslSocketFactory;
+
+	private MongoOptions options;
 
 	/**
-	 * multiplier for connectionsPerHost for # of threads that can block if connectionsPerHost is 10, and
-	 * threadsAllowedToBlockForConnectionMultiplier is 5, then 50 threads can block more than that and an exception will
-	 * be throw
-	 */
-	private int threadsAllowedToBlockForConnectionMultiplier = MONGO_OPTIONS.threadsAllowedToBlockForConnectionMultiplier;
-
-	/**
-	 * max wait time of a blocking thread for a connection
-	 */
-	private int maxWaitTime = MONGO_OPTIONS.maxWaitTime;
-
-	/**
-	 * connect timeout in milliseconds. 0 is default and infinite
-	 */
-	private int connectTimeout = MONGO_OPTIONS.connectTimeout;
-
-	/**
-	 * socket timeout. 0 is default and infinite
-	 */
-	private int socketTimeout = MONGO_OPTIONS.socketTimeout;
-
-	/**
-	 * This controls whether or not to have socket keep alive turned on (SO_KEEPALIVE).
+	 * Configures the maximum number of connections allowed per host until we will block.
 	 * 
-	 * defaults to false
-	 */
-	public boolean socketKeepAlive = MONGO_OPTIONS.socketKeepAlive;
-
-	/**
-	 * this controls whether or not on a connect, the system retries automatically
-	 */
-	private boolean autoConnectRetry = MONGO_OPTIONS.autoConnectRetry;
-
-	private long maxAutoConnectRetryTime = MONGO_OPTIONS.maxAutoConnectRetryTime;
-
-	/**
-	 * This specifies the number of servers to wait for on the write operation, and exception raising behavior.
-	 * 
-	 * Defaults to 0.
-	 */
-	private int writeNumber;
-
-	/**
-	 * This controls timeout for write operations in milliseconds.
-	 * 
-	 * Defaults to 0 (indefinite). Greater than zero is number of milliseconds to wait.
-	 */
-	private int writeTimeout;
-
-	/**
-	 * This controls whether or not to fsync.
-	 * 
-	 * Defaults to false.
-	 */
-	private boolean writeFsync;
-
-	/**
-	 * Specifies if the driver is allowed to read from secondaries or slaves.
-	 * 
-	 * Defaults to false
-	 */
-	private boolean slaveOk = MONGO_OPTIONS.slaveOk;
-
-	/**
-	 * number of connections allowed per host will block if run out
+	 * @param connectionsPerHost
 	 */
 	public void setConnectionsPerHost(int connectionsPerHost) {
 		this.connectionsPerHost = connectionsPerHost;
 	}
 
 	/**
-	 * multiplier for connectionsPerHost for # of threads that can block if connectionsPerHost is 10, and
-	 * threadsAllowedToBlockForConnectionMultiplier is 5, then 50 threads can block more than that and an exception will
-	 * be throw
+	 * A multiplier for connectionsPerHost for # of threads that can block a connection. If connectionsPerHost is 10, and
+	 * threadsAllowedToBlockForConnectionMultiplier is 5, then 50 threads can block. If more threads try to block an
+	 * exception will be thrown.
+	 * 
+	 * @param threadsAllowedToBlockForConnectionMultiplier
 	 */
 	public void setThreadsAllowedToBlockForConnectionMultiplier(int threadsAllowedToBlockForConnectionMultiplier) {
 		this.threadsAllowedToBlockForConnectionMultiplier = threadsAllowedToBlockForConnectionMultiplier;
 	}
 
 	/**
-	 * max wait time of a blocking thread for a connection
+	 * Max wait time of a blocking thread for a connection.
+	 * 
+	 * @param maxWaitTime
 	 */
 	public void setMaxWaitTime(int maxWaitTime) {
 		this.maxWaitTime = maxWaitTime;
 	}
 
 	/**
-	 * connect timeout in milliseconds. 0 is default and infinite
+	 * Configures the connect timeout in milliseconds. Defaults to 0 (infinite time).
+	 * 
+	 * @param connectTimeout
 	 */
 	public void setConnectTimeout(int connectTimeout) {
 		this.connectTimeout = connectTimeout;
 	}
 
 	/**
-	 * socket timeout. 0 is default and infinite
+	 * Configures the socket timeout. Defaults to 0 (infinite time).
+	 * 
+	 * @param socketTimeout
 	 */
 	public void setSocketTimeout(int socketTimeout) {
 		this.socketTimeout = socketTimeout;
 	}
 
 	/**
-	 * This controls whether or not to have socket keep alive
+	 * Configures whether or not to have socket keep alive turned on (SO_KEEPALIVE). Defaults to {@literal false}.
 	 * 
 	 * @param socketKeepAlive
 	 */
@@ -151,7 +115,7 @@ public class MongoOptionsFactoryBean implements FactoryBean<MongoOptions>, Initi
 	 * <li>-1 = don't even report network errors</li>
 	 * <li>0 = default, don't call getLastError by default</li>
 	 * <li>1 = basic, call getLastError, but don't wait for slaves</li>
-	 * <li>2+= wait for slaves</li>
+	 * <li>2 += wait for slaves</li>
 	 * </ul>
 	 * 
 	 * @param writeNumber the number of servers to wait for on the write operation, and exception raising behavior.
@@ -161,33 +125,33 @@ public class MongoOptionsFactoryBean implements FactoryBean<MongoOptions>, Initi
 	}
 
 	/**
-	 * This controls timeout for write operations in milliseconds. The 'wtimeout' option to the getlasterror command.
+	 * Configures the timeout for write operations in milliseconds. This defaults to {@literal 0} (indefinite).
 	 * 
-	 * @param writeTimeout Defaults to 0 (indefinite). Greater than zero is number of milliseconds to wait.
+	 * @param writeTimeout
 	 */
 	public void setWriteTimeout(int writeTimeout) {
 		this.writeTimeout = writeTimeout;
 	}
 
 	/**
-	 * This controls whether or not to fsync. The 'fsync' option to the getlasterror command. Defaults to false.
+	 * Configures whether or not to fsync. The 'fsync' option to the getlasterror command. Defaults to {@literal false}.
 	 * 
-	 * @param writeFsync to fsync on write (true), otherwise false.
+	 * @param writeFsync to fsync on <code>write (true)<code>, otherwise {@literal false}.
 	 */
 	public void setWriteFsync(boolean writeFsync) {
 		this.writeFsync = writeFsync;
 	}
 
 	/**
-	 * this controls whether or not on a connect, the system retries automatically
+	 * Configures whether or not the system retries automatically on a failed connect. This defaults to {@literal false}.
 	 */
 	public void setAutoConnectRetry(boolean autoConnectRetry) {
 		this.autoConnectRetry = autoConnectRetry;
 	}
 
 	/**
-	 * The maximum amount of time in millisecons to spend retrying to open connection to the same server. Default is 0,
-	 * which means to use the default 15s if autoConnectRetry is on.
+	 * Configures the maximum amount of time in millisecons to spend retrying to open connection to the same server. This
+	 * defaults to {@literal 0}, which means to use the default {@literal 15s} if {@link #autoConnectRetry} is on.
 	 * 
 	 * @param maxAutoConnectRetryTime the maxAutoConnectRetryTime to set
 	 */
@@ -196,7 +160,7 @@ public class MongoOptionsFactoryBean implements FactoryBean<MongoOptions>, Initi
 	}
 
 	/**
-	 * Specifies if the driver is allowed to read from secondaries or slaves. Defaults to false.
+	 * Specifies if the driver is allowed to read from secondaries or slaves. Defaults to {@literal false}.
 	 * 
 	 * @param slaveOk true if the driver should read from secondaries or slaves.
 	 */
@@ -204,31 +168,81 @@ public class MongoOptionsFactoryBean implements FactoryBean<MongoOptions>, Initi
 		this.slaveOk = slaveOk;
 	}
 
+	/**
+	 * Specifies if the driver should use an SSL connection to Mongo. This defaults to {@literal false}. By default
+	 * {@link SSLSocketFactory#getDefault()} will be used. See {@link #setSslSocketFactory(SSLSocketFactory)} if you want
+	 * to configure a custom factory.
+	 * 
+	 * @param ssl true if the driver should use an SSL connection.
+	 * @see #setSslSocketFactory(SSLSocketFactory)
+	 */
+	public void setSsl(boolean ssl) {
+		this.ssl = ssl;
+	}
+
+	/**
+	 * Specifies the {@link SSLSocketFactory} to use for creating SSL connections to Mongo. Defaults to
+	 * {@link SSLSocketFactory#getDefault()}. Implicitly activates {@link #setSsl(boolean)} if a non-{@literal null} value
+	 * is given.
+	 * 
+	 * @param sslSocketFactory the sslSocketFactory to use.
+	 * @see #setSsl(boolean)
+	 */
+	public void setSslSocketFactory(SSLSocketFactory sslSocketFactory) {
+
+		setSsl(sslSocketFactory != null);
+		this.sslSocketFactory = sslSocketFactory;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet()
+	 */
 	public void afterPropertiesSet() {
-		MONGO_OPTIONS.connectionsPerHost = connectionsPerHost;
-		MONGO_OPTIONS.threadsAllowedToBlockForConnectionMultiplier = threadsAllowedToBlockForConnectionMultiplier;
-		MONGO_OPTIONS.maxWaitTime = maxWaitTime;
-		MONGO_OPTIONS.connectTimeout = connectTimeout;
-		MONGO_OPTIONS.socketTimeout = socketTimeout;
-		MONGO_OPTIONS.socketKeepAlive = socketKeepAlive;
-		MONGO_OPTIONS.autoConnectRetry = autoConnectRetry;
-		MONGO_OPTIONS.maxAutoConnectRetryTime = maxAutoConnectRetryTime;
-		MONGO_OPTIONS.slaveOk = slaveOk;
-		MONGO_OPTIONS.w = writeNumber;
-		MONGO_OPTIONS.wtimeout = writeTimeout;
-		MONGO_OPTIONS.fsync = writeFsync;
+
+		MongoOptions options = new MongoOptions();
+
+		options.connectionsPerHost = connectionsPerHost;
+		options.threadsAllowedToBlockForConnectionMultiplier = threadsAllowedToBlockForConnectionMultiplier;
+		options.maxWaitTime = maxWaitTime;
+		options.connectTimeout = connectTimeout;
+		options.socketTimeout = socketTimeout;
+		options.socketKeepAlive = socketKeepAlive;
+		options.autoConnectRetry = autoConnectRetry;
+		options.maxAutoConnectRetryTime = maxAutoConnectRetryTime;
+		options.slaveOk = slaveOk;
+		options.w = writeNumber;
+		options.wtimeout = writeTimeout;
+		options.fsync = writeFsync;
+
+		if (ssl) {
+			options.setSocketFactory(sslSocketFactory != null ? sslSocketFactory : SSLSocketFactory.getDefault());
+		}
+
+		this.options = options;
 	}
 
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.FactoryBean#getObject()
+	 */
 	public MongoOptions getObject() {
-		return MONGO_OPTIONS;
+		return this.options;
 	}
 
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.FactoryBean#getObjectType()
+	 */
 	public Class<?> getObjectType() {
 		return MongoOptions.class;
 	}
 
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.beans.factory.FactoryBean#isSingleton()
+	 */
 	public boolean isSingleton() {
 		return true;
 	}
-
 }

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoSynchronization.java

@@ -1,8 +1,26 @@
+/*
+ * Copyright 2012-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.springframework.data.mongodb.core;
 
 import org.springframework.transaction.support.ResourceHolder;
 import org.springframework.transaction.support.ResourceHolderSynchronization;
 
+/**
+ * @author Oliver Gierke
+ */
 class MongoSynchronization extends ResourceHolderSynchronization<ResourceHolder, Object> {
 
 	public MongoSynchronization(ResourceHolder resourceHolder, Object resourceKey) {

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/QueryMapper.java

@@ -1,138 +0,0 @@
-/*
- * Copyright (c) 2011 by the original author(s).
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.springframework.data.mongodb.core;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Iterator;
-import java.util.List;
-
-import org.bson.types.BasicBSONList;
-import org.bson.types.ObjectId;
-import org.springframework.core.convert.ConversionException;
-import org.springframework.core.convert.ConversionService;
-import org.springframework.data.mapping.PersistentEntity;
-import org.springframework.data.mongodb.core.mapping.MongoPersistentEntity;
-import org.springframework.util.Assert;
-
-import com.mongodb.BasicDBObject;
-import com.mongodb.DBObject;
-
-/**
- * A helper class to encapsulate any modifications of a Query object before it gets submitted to the database.
- * 
- * @author Jon Brisbin <jbrisbin@vmware.com>
- * @author Oliver Gierke
- */
-public class QueryMapper {
-
-	private final ConversionService conversionService;
-
-	/**
-	 * Creates a new {@link QueryMapper} with the given {@link ConversionService}.
-	 * 
-	 * @param conversionService must not be {@literal null}.
-	 */
-	public QueryMapper(ConversionService conversionService) {
-		Assert.notNull(conversionService);
-		this.conversionService = conversionService;
-	}
-
-	/**
-	 * Replaces the property keys used in the given {@link DBObject} with the appropriate keys by using the
-	 * {@link PersistentEntity} metadata.
-	 * 
-	 * @param query
-	 * @param entity
-	 * @return
-	 */
-	public DBObject getMappedObject(DBObject query, MongoPersistentEntity<?> entity) {
-		
-		String idKey = null;
-		
-		if (null != entity && entity.getIdProperty() != null) {
-			idKey = entity.getIdProperty().getName();
-		} else if (query.containsField("id")) {
-			idKey = "id";
-		} else if (query.containsField("_id")) {
-			idKey = "_id";
-		}
-
-		DBObject newDbo = new BasicDBObject();
-		for (String key : query.keySet()) {
-			String newKey = key;
-			Object value = query.get(key);
-			if (key.equals(idKey)) {
-				if (value instanceof DBObject) {
-					DBObject valueDbo = (DBObject) value;
-					if (valueDbo.containsField("$in") || valueDbo.containsField("$nin")) {
-						String inKey = valueDbo.containsField("$in") ? "$in" : "$nin";
-						List<Object> ids = new ArrayList<Object>();
-						for (Object id : (Object[]) valueDbo.get(inKey)) {
-							ids.add(convertId(id));
-						}
-						valueDbo.put(inKey, ids.toArray(new Object[ids.size()]));
-					} else {
-						value = getMappedObject((DBObject) value, entity);
-					}
-				} else {
-					value = convertId(value);
-				}
-				newKey = "_id";
-			} else if (key.startsWith("$") && key.endsWith("or")) {
-				// $or/$nor
-				BasicBSONList conditions = (BasicBSONList) value;
-				BasicBSONList newConditions = new BasicBSONList();
-				Iterator<Object> iter = conditions.iterator();
-				while (iter.hasNext()) {
-					newConditions.add(getMappedObject((DBObject) iter.next(), entity));
-				}
-				value = newConditions;
-			} else if (key.equals("$ne")) {
-				value = convertId(value);
-			}
-			
-			newDbo.put(newKey, value);
-		}
-		
-		return newDbo;
-	}
-
-	/**
-	 * Converts the given raw id value into either {@link ObjectId} or {@link String}.
-	 * 
-	 * @param id
-	 * @return
-	 */
-	@SuppressWarnings("unchecked")
-	public Object convertId(Object id) {
-
-		for (Class<?> type : Arrays.asList(ObjectId.class, String.class)) {
-
-			if (id.getClass().isAssignableFrom(type)) {
-				return id;
-			}
-
-			try {
-				return conversionService.convert(id, type);
-			} catch (ConversionException e) {
-				// Ignore
-			}
-		}
-
-		return id;
-	}
-}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/SimpleMongoDbFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2011 the original author or authors.
+ * Copyright 2011-2013 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,13 +17,13 @@ package org.springframework.data.mongodb.core;
 
 import java.net.UnknownHostException;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.springframework.beans.factory.DisposableBean;
 import org.springframework.dao.DataAccessException;
+import org.springframework.dao.support.PersistenceExceptionTranslator;
 import org.springframework.data.authentication.UserCredentials;
 import org.springframework.data.mongodb.MongoDbFactory;
 import org.springframework.util.Assert;
+import org.springframework.util.StringUtils;
 
 import com.mongodb.DB;
 import com.mongodb.Mongo;
@@ -36,44 +36,53 @@ import com.mongodb.WriteConcern;
  * 
  * @author Mark Pollack
  * @author Oliver Gierke
+ * @author Thomas Darimont
  */
 public class SimpleMongoDbFactory implements DisposableBean, MongoDbFactory {
 
-	protected final Log logger = LogFactory.getLog(getClass());
-
 	private final Mongo mongo;
 	private final String databaseName;
-	private String username;
-	private String password;
+	private final boolean mongoInstanceCreated;
+	private final UserCredentials credentials;
+	private final PersistenceExceptionTranslator exceptionTranslator;
+	private final String authenticationDatabaseName;
+
 	private WriteConcern writeConcern;
 
 	/**
 	 * Create an instance of {@link SimpleMongoDbFactory} given the {@link Mongo} instance and database name.
 	 * 
 	 * @param mongo Mongo instance, must not be {@literal null}.
-	 * @param databaseName database name, not be {@literal null}.
+	 * @param databaseName database name, not be {@literal null} or empty.
 	 */
 	public SimpleMongoDbFactory(Mongo mongo, String databaseName) {
-		Assert.notNull(mongo, "Mongo must not be null");
-		Assert.hasText(databaseName, "Database name must not be empty");
-		Assert.isTrue(databaseName.matches("[\\w-]+"), "Database name must only contain letters, numbers, underscores and dashes!");
-		this.mongo = mongo;
-		this.databaseName = databaseName;
+		this(mongo, databaseName, null);
 	}
 
 	/**
 	 * Create an instance of SimpleMongoDbFactory given the Mongo instance, database name, and username/password
 	 * 
 	 * @param mongo Mongo instance, must not be {@literal null}.
-	 * @param databaseName Database name, must not be {@literal null}.
-	 * @param userCredentials username and password must not be {@literal null}.
+	 * @param databaseName Database name, must not be {@literal null} or empty.
+	 * @param credentials username and password.
 	 */
-	public SimpleMongoDbFactory(Mongo mongo, String databaseName, UserCredentials userCredentials) {
-		this(mongo, databaseName);
-		this.username = userCredentials.getUsername();
-		this.password = userCredentials.getPassword();
+	public SimpleMongoDbFactory(Mongo mongo, String databaseName, UserCredentials credentials) {
+		this(mongo, databaseName, credentials, false, null);
 	}
-	
+
+	/**
+	 * Create an instance of SimpleMongoDbFactory given the Mongo instance, database name, and username/password
+	 * 
+	 * @param mongo Mongo instance, must not be {@literal null}.
+	 * @param databaseName Database name, must not be {@literal null} or empty.
+	 * @param credentials username and password.
+	 * @param authenticationDatabaseName the database name to use for authentication
+	 */
+	public SimpleMongoDbFactory(Mongo mongo, String databaseName, UserCredentials credentials,
+			String authenticationDatabaseName) {
+		this(mongo, databaseName, credentials, false, authenticationDatabaseName);
+	}
+
 	/**
 	 * Creates a new {@link SimpleMongoDbFactory} instance from the given {@link MongoURI}.
 	 * 
@@ -82,9 +91,30 @@ public class SimpleMongoDbFactory implements DisposableBean, MongoDbFactory {
 	 * @throws UnknownHostException
 	 * @see MongoURI
 	 */
+	@SuppressWarnings("deprecation")
 	public SimpleMongoDbFactory(MongoURI uri) throws MongoException, UnknownHostException {
-		
-		this(new Mongo(uri), uri.getDatabase(), new UserCredentials(uri.getUsername(), String.valueOf(uri.getPassword())));
+		this(new Mongo(uri), uri.getDatabase(), new UserCredentials(uri.getUsername(), parseChars(uri.getPassword())),
+				true, uri.getDatabase());
+	}
+
+	private SimpleMongoDbFactory(Mongo mongo, String databaseName, UserCredentials credentials,
+			boolean mongoInstanceCreated, String authenticationDatabaseName) {
+
+		Assert.notNull(mongo, "Mongo must not be null");
+		Assert.hasText(databaseName, "Database name must not be empty");
+		Assert.isTrue(databaseName.matches("[\\w-]+"),
+				"Database name must only contain letters, numbers, underscores and dashes!");
+
+		this.mongo = mongo;
+		this.databaseName = databaseName;
+		this.mongoInstanceCreated = mongoInstanceCreated;
+		this.credentials = credentials == null ? UserCredentials.NO_CREDENTIALS : credentials;
+		this.exceptionTranslator = new MongoExceptionTranslator();
+		this.authenticationDatabaseName = StringUtils.hasText(authenticationDatabaseName) ? authenticationDatabaseName
+				: databaseName;
+
+		Assert.isTrue(this.authenticationDatabaseName.matches("[\\w-]+"),
+				"Authentication database name must only contain letters, numbers, underscores and dashes!");
 	}
 
 	/**
@@ -112,7 +142,7 @@ public class SimpleMongoDbFactory implements DisposableBean, MongoDbFactory {
 
 		Assert.hasText(dbName, "Database name must not be empty.");
 
-		DB db = MongoDbUtils.getDB(mongo, dbName, username, password == null ? null : password.toCharArray());
+		DB db = MongoDbUtils.getDB(mongo, dbName, credentials, authenticationDatabaseName);
 
 		if (writeConcern != null) {
 			db.setWriteConcern(writeConcern);
@@ -122,9 +152,26 @@ public class SimpleMongoDbFactory implements DisposableBean, MongoDbFactory {
 	}
 
 	/**
-	 * Clean up the Mongo instance.
+	 * Clean up the Mongo instance if it was created by the factory itself.
+	 * 
+	 * @see DisposableBean#destroy()
 	 */
 	public void destroy() throws Exception {
-		mongo.close();
+		if (mongoInstanceCreated) {
+			mongo.close();
+		}
+	}
+
+	private static String parseChars(char[] chars) {
+		return chars == null ? null : String.valueOf(chars);
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.MongoDbFactory#getExceptionTranslator()
+	 */
+	@Override
+	public PersistenceExceptionTranslator getExceptionTranslator() {
+		return this.exceptionTranslator;
 	}
 }

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/WriteConcernResolver.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2011-2012 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core;
+
+import com.mongodb.WriteConcern;
+
+/**
+ * A strategy interface to determine the {@link WriteConcern} to use for a given {@link MongoAction}. Return the passed
+ * in default {@link WriteConcern} (a property on {@link MongoAction}) if no determination can be made.
+ * 
+ * @author Mark Pollack
+ * @author Oliver Gierke
+ */
+public interface WriteConcernResolver {
+
+	/**
+	 * Resolve the {@link WriteConcern} given the {@link MongoAction}.
+	 * 
+	 * @param action describes the context of the Mongo action. Contains a default {@link WriteConcern} to use if one
+	 *          should not be resolved.
+	 * @return a {@link WriteConcern} based on the passed in {@link MongoAction} value, maybe {@literal null}.
+	 */
+	WriteConcern resolve(MongoAction action);
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/WriteResultChecking.java

@@ -1,5 +1,28 @@
+/*
+ * Copyright 2012 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.springframework.data.mongodb.core;
 
+/**
+ * Enum to represent how strict the check of {@link com.mongodb.WriteResult} shall be. It can either be skipped entirely
+ * (use {@link #NONE}), or errors can be logged ({@link #LOG}) or cause an exception to be thrown {@link #EXCEPTION}.
+ * 
+ * @author Thomas Risberg
+ * @author Oliver Gierke
+ */
 public enum WriteResultChecking {
+
 	NONE, LOG, EXCEPTION
 }

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/Aggregation.java

@@ -0,0 +1,424 @@
+/*
+ * Copyright 2013-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import static org.springframework.data.mongodb.core.aggregation.Fields.*;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import org.springframework.data.domain.Sort;
+import org.springframework.data.domain.Sort.Direction;
+import org.springframework.data.mongodb.core.aggregation.ExposedFields.ExposedField;
+import org.springframework.data.mongodb.core.aggregation.ExposedFields.FieldReference;
+import org.springframework.data.mongodb.core.aggregation.Fields.AggregationField;
+import org.springframework.data.mongodb.core.query.Criteria;
+import org.springframework.data.mongodb.core.query.SerializationUtils;
+import org.springframework.util.Assert;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+
+/**
+ * An {@code Aggregation} is a representation of a list of aggregation steps to be performed by the MongoDB Aggregation
+ * Framework.
+ * 
+ * @author Tobias Trelle
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ * @since 1.3
+ */
+public class Aggregation {
+
+	/**
+	 * References the root document, i.e. the top-level document, currently being processed in the aggregation pipeline
+	 * stage.
+	 */
+	public static final String ROOT = SystemVariable.ROOT.toString();
+
+	/**
+	 * References the start of the field path being processed in the aggregation pipeline stage. Unless documented
+	 * otherwise, all stages start with CURRENT the same as ROOT.
+	 */
+	public static final String CURRENT = SystemVariable.CURRENT.toString();
+
+	public static final AggregationOperationContext DEFAULT_CONTEXT = new NoOpAggregationOperationContext();
+	public static final AggregationOptions DEFAULT_OPTIONS = newAggregationOptions().build();
+
+	protected final List<AggregationOperation> operations;
+	private final AggregationOptions options;
+
+	/**
+	 * Creates a new {@link Aggregation} from the given {@link AggregationOperation}s.
+	 * 
+	 * @param operations must not be {@literal null} or empty.
+	 */
+	public static Aggregation newAggregation(List<? extends AggregationOperation> operations) {
+		return newAggregation(operations.toArray(new AggregationOperation[operations.size()]));
+	}
+
+	/**
+	 * Creates a new {@link Aggregation} from the given {@link AggregationOperation}s.
+	 * 
+	 * @param operations must not be {@literal null} or empty.
+	 */
+	public static Aggregation newAggregation(AggregationOperation... operations) {
+		return new Aggregation(operations);
+	}
+
+	/**
+	 * Returns a copy of this {@link Aggregation} with the given {@link AggregationOptions} set. Note that options are
+	 * supported in MongoDB version 2.6+.
+	 * 
+	 * @param options must not be {@literal null}.
+	 * @return
+	 * @since 1.6
+	 */
+	public Aggregation withOptions(AggregationOptions options) {
+
+		Assert.notNull(options, "AggregationOptions must not be null.");
+		return new Aggregation(this.operations, options);
+	}
+
+	/**
+	 * Creates a new {@link TypedAggregation} for the given type and {@link AggregationOperation}s.
+	 * 
+	 * @param type must not be {@literal null}.
+	 * @param operations must not be {@literal null} or empty.
+	 */
+	public static <T> TypedAggregation<T> newAggregation(Class<T> type, List<? extends AggregationOperation> operations) {
+		return newAggregation(type, operations.toArray(new AggregationOperation[operations.size()]));
+	}
+
+	/**
+	 * Creates a new {@link TypedAggregation} for the given type and {@link AggregationOperation}s.
+	 * 
+	 * @param type must not be {@literal null}.
+	 * @param operations must not be {@literal null} or empty.
+	 */
+	public static <T> TypedAggregation<T> newAggregation(Class<T> type, AggregationOperation... operations) {
+		return new TypedAggregation<T>(type, operations);
+	}
+
+	/**
+	 * Creates a new {@link Aggregation} from the given {@link AggregationOperation}s.
+	 * 
+	 * @param aggregationOperations must not be {@literal null} or empty.
+	 */
+	protected Aggregation(AggregationOperation... aggregationOperations) {
+		this(asAggregationList(aggregationOperations));
+	}
+
+	/**
+	 * @param aggregationOperations must not be {@literal null} or empty.
+	 * @return
+	 */
+	protected static List<AggregationOperation> asAggregationList(AggregationOperation... aggregationOperations) {
+
+		Assert.notEmpty(aggregationOperations, "AggregationOperations must not be null or empty!");
+
+		return Arrays.asList(aggregationOperations);
+	}
+
+	/**
+	 * Creates a new {@link Aggregation} from the given {@link AggregationOperation}s.
+	 * 
+	 * @param aggregationOperations must not be {@literal null} or empty.
+	 */
+	protected Aggregation(List<AggregationOperation> aggregationOperations) {
+		this(aggregationOperations, DEFAULT_OPTIONS);
+	}
+
+	/**
+	 * Creates a new {@link Aggregation} from the given {@link AggregationOperation}s.
+	 * 
+	 * @param aggregationOperations must not be {@literal null} or empty.
+	 * @param options must not be {@literal null} or empty.
+	 */
+	protected Aggregation(List<AggregationOperation> aggregationOperations, AggregationOptions options) {
+
+		Assert.notNull(aggregationOperations, "AggregationOperations must not be null!");
+		Assert.isTrue(aggregationOperations.size() > 0, "At least one AggregationOperation has to be provided");
+		Assert.notNull(options, "AggregationOptions must not be null!");
+
+		this.operations = aggregationOperations;
+		this.options = options;
+	}
+
+	/**
+	 * A pointer to the previous {@link AggregationOperation}.
+	 * 
+	 * @return
+	 */
+	public static String previousOperation() {
+		return "_id";
+	}
+
+	/**
+	 * Creates a new {@link ProjectionOperation} including the given fields.
+	 * 
+	 * @param fields must not be {@literal null}.
+	 * @return
+	 */
+	public static ProjectionOperation project(String... fields) {
+		return project(fields(fields));
+	}
+
+	/**
+	 * Creates a new {@link ProjectionOperation} includeing the given {@link Fields}.
+	 * 
+	 * @param fields must not be {@literal null}.
+	 * @return
+	 */
+	public static ProjectionOperation project(Fields fields) {
+		return new ProjectionOperation(fields);
+	}
+
+	/**
+	 * Factory method to create a new {@link UnwindOperation} for the field with the given name.
+	 * 
+	 * @param fieldName must not be {@literal null} or empty.
+	 * @return
+	 */
+	public static UnwindOperation unwind(String field) {
+		return new UnwindOperation(field(field));
+	}
+
+	/**
+	 * Creates a new {@link GroupOperation} for the given fields.
+	 * 
+	 * @param fields must not be {@literal null}.
+	 * @return
+	 */
+	public static GroupOperation group(String... fields) {
+		return group(fields(fields));
+	}
+
+	/**
+	 * Creates a new {@link GroupOperation} for the given {@link Fields}.
+	 * 
+	 * @param fields must not be {@literal null}.
+	 * @return
+	 */
+	public static GroupOperation group(Fields fields) {
+		return new GroupOperation(fields);
+	}
+
+	/**
+	 * Factory method to create a new {@link SortOperation} for the given {@link Sort}.
+	 * 
+	 * @param sort must not be {@literal null}.
+	 * @return
+	 */
+	public static SortOperation sort(Sort sort) {
+		return new SortOperation(sort);
+	}
+
+	/**
+	 * Factory method to create a new {@link SortOperation} for the given sort {@link Direction} and {@code fields}.
+	 * 
+	 * @param direction must not be {@literal null}.
+	 * @param fields must not be {@literal null}.
+	 * @return
+	 */
+	public static SortOperation sort(Direction direction, String... fields) {
+		return new SortOperation(new Sort(direction, fields));
+	}
+
+	/**
+	 * Creates a new {@link SkipOperation} skipping the given number of elements.
+	 * 
+	 * @param elementsToSkip must not be less than zero.
+	 * @return
+	 */
+	public static SkipOperation skip(int elementsToSkip) {
+		return new SkipOperation(elementsToSkip);
+	}
+
+	/**
+	 * Creates a new {@link LimitOperation} limiting the result to the given number of elements.
+	 * 
+	 * @param maxElements must not be less than zero.
+	 * @return
+	 */
+	public static LimitOperation limit(long maxElements) {
+		return new LimitOperation(maxElements);
+	}
+
+	/**
+	 * Creates a new {@link MatchOperation} using the given {@link Criteria}.
+	 * 
+	 * @param criteria must not be {@literal null}.
+	 * @return
+	 */
+	public static MatchOperation match(Criteria criteria) {
+		return new MatchOperation(criteria);
+	}
+
+	/**
+	 * Creates a new {@link Fields} instance for the given field names.
+	 * 
+	 * @see Fields#fields(String...)
+	 * @param fields must not be {@literal null}.
+	 * @return
+	 */
+	public static Fields fields(String... fields) {
+		return Fields.fields(fields);
+	}
+
+	/**
+	 * Creates a new {@link Fields} instance from the given field name and target reference.
+	 * 
+	 * @param name must not be {@literal null} or empty.
+	 * @param target must not be {@literal null} or empty.
+	 * @return
+	 */
+	public static Fields bind(String name, String target) {
+		return Fields.from(field(name, target));
+	}
+
+	/**
+	 * Returns a new {@link AggregationOptions.Builder}.
+	 * 
+	 * @return
+	 * @since 1.6
+	 */
+	public static AggregationOptions.Builder newAggregationOptions() {
+		return new AggregationOptions.Builder();
+	}
+
+	/**
+	 * Converts this {@link Aggregation} specification to a {@link DBObject}.
+	 * 
+	 * @param inputCollectionName the name of the input collection
+	 * @return the {@code DBObject} representing this aggregation
+	 */
+	public DBObject toDbObject(String inputCollectionName, AggregationOperationContext rootContext) {
+
+		AggregationOperationContext context = rootContext;
+		List<DBObject> operationDocuments = new ArrayList<DBObject>(operations.size());
+
+		for (AggregationOperation operation : operations) {
+
+			operationDocuments.add(operation.toDBObject(context));
+
+			if (operation instanceof FieldsExposingAggregationOperation) {
+				FieldsExposingAggregationOperation exposedFieldsOperation = (FieldsExposingAggregationOperation) operation;
+				context = new ExposedFieldsAggregationOperationContext(exposedFieldsOperation.getFields(), rootContext);
+			}
+		}
+
+		DBObject command = new BasicDBObject("aggregate", inputCollectionName);
+		command.put("pipeline", operationDocuments);
+
+		command = options.applyAndReturnPotentiallyChangedCommand(command);
+
+		return command;
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see java.lang.Object#toString()
+	 */
+	@Override
+	public String toString() {
+		return SerializationUtils
+				.serializeToJsonSafely(toDbObject("__collection__", new NoOpAggregationOperationContext()));
+	}
+
+	/**
+	 * Simple {@link AggregationOperationContext} that just returns {@link FieldReference}s as is.
+	 * 
+	 * @author Oliver Gierke
+	 */
+	private static class NoOpAggregationOperationContext implements AggregationOperationContext {
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperationContext#getMappedObject(com.mongodb.DBObject)
+		 */
+		@Override
+		public DBObject getMappedObject(DBObject dbObject) {
+			return dbObject;
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperationContext#getReference(org.springframework.data.mongodb.core.aggregation.ExposedFields.AvailableField)
+		 */
+		@Override
+		public FieldReference getReference(Field field) {
+			return new FieldReference(new ExposedField(field, true));
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperationContext#getReference(java.lang.String)
+		 */
+		@Override
+		public FieldReference getReference(String name) {
+			return new FieldReference(new ExposedField(new AggregationField(name), true));
+		}
+	}
+
+	/**
+	 * Describes the system variables available in MongoDB aggregation framework pipeline expressions.
+	 * 
+	 * @author Thomas Darimont
+	 * @see http://docs.mongodb.org/manual/reference/aggregation-variables
+	 */
+	enum SystemVariable {
+
+		ROOT, CURRENT;
+
+		private static final String PREFIX = "$$";
+
+		/**
+		 * Return {@literal true} if the given {@code fieldRef} denotes a well-known system variable, {@literal false}
+		 * otherwise.
+		 * 
+		 * @param fieldRef may be {@literal null}.
+		 * @return
+		 */
+		public static boolean isReferingToSystemVariable(String fieldRef) {
+
+			if (fieldRef == null || !fieldRef.startsWith(PREFIX) || fieldRef.length() <= 2) {
+				return false;
+			}
+
+			int indexOfFirstDot = fieldRef.indexOf('.');
+			String candidate = fieldRef.substring(2, indexOfFirstDot == -1 ? fieldRef.length() : indexOfFirstDot);
+
+			for (SystemVariable value : values()) {
+				if (value.name().equals(candidate)) {
+					return true;
+				}
+			}
+
+			return false;
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see java.lang.Enum#toString()
+		 */
+		@Override
+		public String toString() {
+			return PREFIX.concat(name());
+		}
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/AggregationExpressionTransformer.java

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import org.springframework.data.mongodb.core.aggregation.AggregationExpressionTransformer.AggregationExpressionTransformationContext;
+import org.springframework.data.mongodb.core.aggregation.ExposedFields.FieldReference;
+import org.springframework.data.mongodb.core.spel.ExpressionNode;
+import org.springframework.data.mongodb.core.spel.ExpressionTransformationContextSupport;
+import org.springframework.data.mongodb.core.spel.ExpressionTransformer;
+import org.springframework.util.Assert;
+
+import com.mongodb.DBObject;
+
+/**
+ * Interface to type an {@link ExpressionTransformer} to the contained
+ * {@link AggregationExpressionTransformationContext}.
+ * 
+ * @author Oliver Gierke
+ */
+interface AggregationExpressionTransformer extends
+		ExpressionTransformer<AggregationExpressionTransformationContext<ExpressionNode>> {
+
+	/**
+	 * A special {@link ExpressionTransformationContextSupport} to be aware of the {@link AggregationOperationContext}.
+	 * 
+	 * @author Oliver Gierke
+	 * @author Thomas Darimont
+	 */
+	public static class AggregationExpressionTransformationContext<T extends ExpressionNode> extends
+			ExpressionTransformationContextSupport<T> {
+
+		private final AggregationOperationContext aggregationContext;
+
+		/**
+		 * Creates an {@link AggregationExpressionTransformationContext}.
+		 * 
+		 * @param currentNode must not be {@literal null}.
+		 * @param parentNode
+		 * @param previousOperationObject
+		 * @param aggregationContext must not be {@literal null}.
+		 */
+		public AggregationExpressionTransformationContext(T currentNode, ExpressionNode parentNode,
+				DBObject previousOperationObject, AggregationOperationContext context) {
+
+			super(currentNode, parentNode, previousOperationObject);
+
+			Assert.notNull(context, "AggregationOperationContext must not be null!");
+			this.aggregationContext = context;
+		}
+
+		/**
+		 * Returns the underlying {@link AggregationOperationContext}.
+		 * 
+		 * @return
+		 */
+		public AggregationOperationContext getAggregationContext() {
+			return aggregationContext;
+		}
+
+		/**
+		 * Returns the {@link FieldReference} for the current {@link ExpressionNode}.
+		 * 
+		 * @return
+		 */
+		public FieldReference getFieldReference() {
+			return aggregationContext.getReference(getCurrentNode().getName());
+		}
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/AggregationOperation.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import com.mongodb.DBObject;
+
+/**
+ * Represents one single operation in an aggregation pipeline.
+ * 
+ * @author Sebastian Herold
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ * @since 1.3
+ */
+public interface AggregationOperation {
+
+	/**
+	 * Turns the {@link AggregationOperation} into a {@link DBObject} by using the given
+	 * {@link AggregationOperationContext}.
+	 * 
+	 * @return the DBObject
+	 */
+	DBObject toDBObject(AggregationOperationContext context);
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/AggregationOperationContext.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import org.springframework.data.mongodb.core.aggregation.ExposedFields.FieldReference;
+
+import com.mongodb.DBObject;
+
+/**
+ * The context for an {@link AggregationOperation}.
+ * 
+ * @author Oliver Gierke
+ * @since 1.3
+ */
+public interface AggregationOperationContext {
+
+	/**
+	 * Returns the mapped {@link DBObject}, potentially converting the source considering mapping metadata etc.
+	 * 
+	 * @param dbObject will never be {@literal null}.
+	 * @return must not be {@literal null}.
+	 */
+	DBObject getMappedObject(DBObject dbObject);
+
+	/**
+	 * Returns a {@link FieldReference} for the given field or {@literal null} if the context does not expose the given
+	 * field.
+	 * 
+	 * @param field must not be {@literal null}.
+	 * @return
+	 */
+	FieldReference getReference(Field field);
+
+	/**
+	 * Returns the {@link FieldReference} for the field with the given name or {@literal null} if the context does not
+	 * expose a field with the given name.
+	 * 
+	 * @param name must not be {@literal null} or empty.
+	 * @return
+	 */
+	FieldReference getReference(String name);
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/AggregationOptions.java

@@ -0,0 +1,189 @@
+/*
+ * Copyright 2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+
+/**
+ * Holds a set of configurable aggregation options that can be used within an aggregation pipeline. A list of support
+ * aggregation options can be found in the MongoDB reference documentation
+ * http://docs.mongodb.org/manual/reference/command/aggregate/#aggregate
+ * 
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ * @see Aggregation#withOptions(AggregationOptions)
+ * @see TypedAggregation#withOptions(AggregationOptions)
+ * @since 1.6
+ */
+public class AggregationOptions {
+
+	private static final String CURSOR = "cursor";
+	private static final String EXPLAIN = "explain";
+	private static final String ALLOW_DISK_USE = "allowDiskUse";
+
+	private final boolean allowDiskUse;
+	private final boolean explain;
+	private final DBObject cursor;
+
+	/**
+	 * Creates a new {@link AggregationOptions}.
+	 * 
+	 * @param allowDiskUse whether to off-load intensive sort-operations to disk.
+	 * @param explain whether to get the execution plan for the aggregation instead of the actual results.
+	 * @param cursor can be {@literal null}, used to pass additional options to the aggregation.
+	 */
+	public AggregationOptions(boolean allowDiskUse, boolean explain, DBObject cursor) {
+
+		this.allowDiskUse = allowDiskUse;
+		this.explain = explain;
+		this.cursor = cursor;
+	}
+
+	/**
+	 * Enables writing to temporary files. When set to true, aggregation stages can write data to the _tmp subdirectory in
+	 * the dbPath directory.
+	 * 
+	 * @return
+	 */
+	public boolean isAllowDiskUse() {
+		return allowDiskUse;
+	}
+
+	/**
+	 * Specifies to return the information on the processing of the pipeline.
+	 * 
+	 * @return
+	 */
+	public boolean isExplain() {
+		return explain;
+	}
+
+	/**
+	 * Specify a document that contains options that control the creation of the cursor object.
+	 * 
+	 * @return
+	 */
+	public DBObject getCursor() {
+		return cursor;
+	}
+
+	/**
+	 * Returns a new potentially adjusted copy for the given {@code aggregationCommandObject} with the configuration
+	 * applied.
+	 * 
+	 * @param command the aggregation command.
+	 * @return
+	 */
+	DBObject applyAndReturnPotentiallyChangedCommand(DBObject command) {
+
+		DBObject result = new BasicDBObject(command.toMap());
+
+		if (allowDiskUse && !result.containsField(ALLOW_DISK_USE)) {
+			result.put(ALLOW_DISK_USE, allowDiskUse);
+		}
+
+		if (explain && !result.containsField(EXPLAIN)) {
+			result.put(EXPLAIN, explain);
+		}
+
+		if (cursor != null && !result.containsField(CURSOR)) {
+			result.put("cursor", cursor);
+		}
+
+		return result;
+	}
+
+	/**
+	 * Returns a {@link DBObject} representation of this {@link AggregationOptions}.
+	 * 
+	 * @return
+	 */
+	public DBObject toDbObject() {
+
+		DBObject dbo = new BasicDBObject();
+		dbo.put(ALLOW_DISK_USE, allowDiskUse);
+		dbo.put(EXPLAIN, explain);
+		dbo.put(CURSOR, cursor);
+
+		return dbo;
+	}
+
+	/* (non-Javadoc)
+	 * @see java.lang.Object#toString()
+	 */
+	@Override
+	public String toString() {
+		return toDbObject().toString();
+	}
+
+	/**
+	 * A Builder for {@link AggregationOptions}.
+	 * 
+	 * @author Thomas Darimont
+	 */
+	public static class Builder {
+
+		private boolean allowDiskUse;
+		private boolean explain;
+		private DBObject cursor;
+
+		/**
+		 * Defines whether to off-load intensive sort-operations to disk.
+		 * 
+		 * @param allowDiskUse
+		 * @return
+		 */
+		public Builder allowDiskUse(boolean allowDiskUse) {
+
+			this.allowDiskUse = allowDiskUse;
+			return this;
+		}
+
+		/**
+		 * Defines whether to get the execution plan for the aggregation instead of the actual results.
+		 * 
+		 * @param explain
+		 * @return
+		 */
+		public Builder explain(boolean explain) {
+
+			this.explain = explain;
+			return this;
+		}
+
+		/**
+		 * Additional options to the aggregation.
+		 * 
+		 * @param cursor
+		 * @return
+		 */
+		public Builder cursor(DBObject cursor) {
+
+			this.cursor = cursor;
+			return this;
+		}
+
+		/**
+		 * Returns a new {@link AggregationOptions} instance with the given configuration.
+		 * 
+		 * @return
+		 */
+		public AggregationOptions build() {
+			return new AggregationOptions(allowDiskUse, explain, cursor);
+		}
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/AggregationResults.java

@@ -0,0 +1,109 @@
+/*
+ * Copyright 2013-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+
+import org.springframework.util.Assert;
+
+import com.mongodb.DBObject;
+
+/**
+ * Collects the results of executing an aggregation operation.
+ * 
+ * @author Tobias Trelle
+ * @author Oliver Gierke
+ * @author Thomas Darimont
+ * @param <T> The class in which the results are mapped onto.
+ * @since 1.3
+ */
+public class AggregationResults<T> implements Iterable<T> {
+
+	private final List<T> mappedResults;
+	private final DBObject rawResults;
+	private final String serverUsed;
+
+	/**
+	 * Creates a new {@link AggregationResults} instance from the given mapped and raw results.
+	 * 
+	 * @param mappedResults must not be {@literal null}.
+	 * @param rawResults must not be {@literal null}.
+	 */
+	public AggregationResults(List<T> mappedResults, DBObject rawResults) {
+
+		Assert.notNull(mappedResults);
+		Assert.notNull(rawResults);
+
+		this.mappedResults = Collections.unmodifiableList(mappedResults);
+		this.rawResults = rawResults;
+		this.serverUsed = parseServerUsed();
+	}
+
+	/**
+	 * Returns the aggregation results.
+	 * 
+	 * @return
+	 */
+	public List<T> getMappedResults() {
+		return mappedResults;
+	}
+
+	/**
+	 * Returns the unique mapped result. Assumes no result or exactly one.
+	 * 
+	 * @return
+	 * @throws IllegalArgumentException in case more than one result is available.
+	 */
+	public T getUniqueMappedResult() {
+		Assert.isTrue(mappedResults.size() < 2, "Expected unique result or null, but got more than one!");
+		return mappedResults.size() == 1 ? mappedResults.get(0) : null;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see java.lang.Iterable#iterator()
+	 */
+	public Iterator<T> iterator() {
+		return mappedResults.iterator();
+	}
+
+	/**
+	 * Returns the server that has been used to perform the aggregation.
+	 * 
+	 * @return
+	 */
+	public String getServerUsed() {
+		return serverUsed;
+	}
+
+	/**
+	 * Returns the raw result that was returned by the server.
+	 * 
+	 * @return
+	 * @since 1.6
+	 */
+	public DBObject getRawResults() {
+		return rawResults;
+	}
+
+	private String parseServerUsed() {
+
+		Object object = rawResults.get("serverUsed");
+		return object instanceof String ? (String) object : null;
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/ExposedFields.java

@@ -0,0 +1,413 @@
+/*
+ * Copyright 2013-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+
+import org.springframework.data.mongodb.core.aggregation.ExposedFields.ExposedField;
+import org.springframework.util.Assert;
+import org.springframework.util.CompositeIterator;
+
+/**
+ * Value object to capture the fields exposed by an {@link AggregationOperation}.
+ * 
+ * @author Oliver Gierke
+ * @author Thomas Darimont
+ * @since 1.3
+ */
+public final class ExposedFields implements Iterable<ExposedField> {
+
+	private static final List<ExposedField> NO_FIELDS = Collections.emptyList();
+	private static final ExposedFields EMPTY = new ExposedFields(NO_FIELDS, NO_FIELDS);
+
+	private final List<ExposedField> originalFields;
+	private final List<ExposedField> syntheticFields;
+
+	/**
+	 * Creates a new {@link ExposedFields} instance from the given {@link ExposedField}s.
+	 * 
+	 * @param fields must not be {@literal null}.
+	 * @return
+	 */
+	public static ExposedFields from(ExposedField... fields) {
+		return from(Arrays.asList(fields));
+	}
+
+	/**
+	 * Creates a new {@link ExposedFields} instance from the given {@link ExposedField}s.
+	 * 
+	 * @param fields must not be {@literal null}.
+	 * @return
+	 */
+	private static ExposedFields from(List<ExposedField> fields) {
+
+		ExposedFields result = EMPTY;
+
+		for (ExposedField field : fields) {
+			result = result.and(field);
+		}
+
+		return result;
+	}
+
+	/**
+	 * Creates synthetic {@link ExposedFields} from the given {@link Fields}.
+	 * 
+	 * @param fields must not be {@literal null}.
+	 * @return
+	 */
+	public static ExposedFields synthetic(Fields fields) {
+		return createFields(fields, true);
+	}
+
+	/**
+	 * Creates non-synthetic {@link ExposedFields} from the given {@link Fields}.
+	 * 
+	 * @param fields must not be {@literal null}.
+	 * @return
+	 */
+	public static ExposedFields nonSynthetic(Fields fields) {
+		return createFields(fields, false);
+	}
+
+	/**
+	 * Creates a new {@link ExposedFields} instance for the given fields in either sythetic or non-synthetic way.
+	 * 
+	 * @param fields must not be {@literal null}.
+	 * @param synthetic
+	 * @return
+	 */
+	private static ExposedFields createFields(Fields fields, boolean synthetic) {
+
+		Assert.notNull(fields, "Fields must not be null!");
+		List<ExposedField> result = new ArrayList<ExposedField>();
+
+		for (Field field : fields) {
+			result.add(new ExposedField(field, synthetic));
+		}
+
+		return ExposedFields.from(result);
+	}
+
+	/**
+	 * Creates a new {@link ExposedFields} with the given orignals and synthetics.
+	 * 
+	 * @param originals must not be {@literal null}.
+	 * @param synthetic must not be {@literal null}.
+	 */
+	private ExposedFields(List<ExposedField> originals, List<ExposedField> synthetic) {
+
+		this.originalFields = originals;
+		this.syntheticFields = synthetic;
+	}
+
+	/**
+	 * Creates a new {@link ExposedFields} adding the given {@link ExposedField}.
+	 * 
+	 * @param field must not be {@literal null}.
+	 * @return
+	 */
+	public ExposedFields and(ExposedField field) {
+
+		Assert.notNull(field, "Exposed field must not be null!");
+
+		ArrayList<ExposedField> result = new ArrayList<ExposedField>();
+		result.addAll(field.synthetic ? syntheticFields : originalFields);
+		result.add(field);
+
+		return new ExposedFields(field.synthetic ? originalFields : result, field.synthetic ? result : syntheticFields);
+	}
+
+	/**
+	 * Returns the field with the given name or {@literal null} if no field with the given name is available.
+	 * 
+	 * @param name
+	 * @return
+	 */
+	public ExposedField getField(String name) {
+
+		for (ExposedField field : this) {
+			if (field.canBeReferredToBy(name)) {
+				return field;
+			}
+		}
+
+		return null;
+	}
+
+	/**
+	 * Returns whether the {@link ExposedFields} exposes no non-synthetic fields at all.
+	 * 
+	 * @return
+	 */
+	boolean exposesNoNonSyntheticFields() {
+		return originalFields.isEmpty();
+	}
+
+	/**
+	 * Returns whether the {@link ExposedFields} exposes a single non-synthetic field only.
+	 * 
+	 * @return
+	 */
+	boolean exposesSingleNonSyntheticFieldOnly() {
+		return originalFields.size() == 1;
+	}
+
+	/**
+	 * Returns whether the {@link ExposedFields} exposes no fields at all.
+	 * 
+	 * @return
+	 */
+	boolean exposesNoFields() {
+		return exposedFieldsCount() == 0;
+	}
+
+	/**
+	 * Returns whether the {@link ExposedFields} exposes a single field only.
+	 * 
+	 * @return
+	 */
+	boolean exposesSingleFieldOnly() {
+		return exposedFieldsCount() == 1;
+	}
+
+	/**
+	 * @return
+	 */
+	private int exposedFieldsCount() {
+		return originalFields.size() + syntheticFields.size();
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see java.lang.Iterable#iterator()
+	 */
+	@Override
+	public Iterator<ExposedField> iterator() {
+
+		CompositeIterator<ExposedField> iterator = new CompositeIterator<ExposedField>();
+		iterator.add(syntheticFields.iterator());
+		iterator.add(originalFields.iterator());
+
+		return iterator;
+	}
+
+	/**
+	 * A single exposed field.
+	 * 
+	 * @author Oliver Gierke
+	 */
+	static class ExposedField implements Field {
+
+		private final boolean synthetic;
+		private final Field field;
+
+		/**
+		 * Creates a new {@link ExposedField} with the given key.
+		 * 
+		 * @param key must not be {@literal null} or empty.
+		 * @param synthetic whether the exposed field is synthetic.
+		 */
+		public ExposedField(String key, boolean synthetic) {
+			this(Fields.field(key), synthetic);
+		}
+
+		/**
+		 * Creates a new {@link ExposedField} for the given {@link Field}.
+		 * 
+		 * @param delegate must not be {@literal null}.
+		 * @param synthetic whether the exposed field is synthetic.
+		 */
+		public ExposedField(Field delegate, boolean synthetic) {
+
+			this.field = delegate;
+			this.synthetic = synthetic;
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.Field#getKey()
+		 */
+		@Override
+		public String getName() {
+			return field.getName();
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.Field#getTarget()
+		 */
+		@Override
+		public String getTarget() {
+			return field.getTarget();
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.Field#isAliased()
+		 */
+		@Override
+		public boolean isAliased() {
+			return field.isAliased();
+		}
+
+		/**
+		 * @return the synthetic
+		 */
+		public boolean isSynthetic() {
+			return synthetic;
+		}
+
+		/**
+		 * Returns whether the field can be referred to using the given name.
+		 * 
+		 * @param name
+		 * @return
+		 */
+		public boolean canBeReferredToBy(String name) {
+			return getName().equals(name) || getTarget().equals(name);
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see java.lang.Object#toString()
+		 */
+		@Override
+		public String toString() {
+			return String.format("AggregationField: %s, synthetic: %s", field, synthetic);
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see java.lang.Object#equals(java.lang.Object)
+		 */
+		@Override
+		public boolean equals(Object obj) {
+
+			if (this == obj) {
+				return true;
+			}
+
+			if (!(obj instanceof ExposedField)) {
+				return false;
+			}
+
+			ExposedField that = (ExposedField) obj;
+
+			return this.field.equals(that.field) && this.synthetic == that.synthetic;
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see java.lang.Object#hashCode()
+		 */
+		@Override
+		public int hashCode() {
+
+			int result = 17;
+
+			result += 31 * field.hashCode();
+			result += 31 * (synthetic ? 0 : 1);
+
+			return result;
+		}
+	}
+
+	/**
+	 * A reference to an {@link ExposedField}.
+	 * 
+	 * @author Oliver Gierke
+	 */
+	static class FieldReference {
+
+		private final ExposedField field;
+
+		/**
+		 * Creates a new {@link FieldReference} for the given {@link ExposedField}.
+		 * 
+		 * @param field must not be {@literal null}.
+		 */
+		public FieldReference(ExposedField field) {
+
+			Assert.notNull(field, "ExposedField must not be null!");
+
+			this.field = field;
+		}
+
+		/**
+		 * Returns the raw, unqualified reference, i.e. the field reference without a {@literal $} prefix.
+		 * 
+		 * @return
+		 */
+		public String getRaw() {
+
+			String target = field.getTarget();
+			return field.synthetic ? target : String.format("%s.%s", Fields.UNDERSCORE_ID, target);
+		}
+
+		/**
+		 * Returns the referenve value for the given field reference. Will return 1 for a synthetic, unaliased field or the
+		 * raw rendering of the reference otherwise.
+		 * 
+		 * @return
+		 */
+		public Object getReferenceValue() {
+			return field.synthetic && !field.isAliased() ? 1 : toString();
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see java.lang.Object#toString()
+		 */
+		@Override
+		public String toString() {
+			return String.format("$%s", getRaw());
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see java.lang.Object#equals(java.lang.Object)
+		 */
+		@Override
+		public boolean equals(Object obj) {
+
+			if (this == obj) {
+				return true;
+			}
+
+			if (!(obj instanceof FieldReference)) {
+				return false;
+			}
+
+			FieldReference that = (FieldReference) obj;
+
+			return this.field.equals(that.field);
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see java.lang.Object#hashCode()
+		 */
+		@Override
+		public int hashCode() {
+			return field.hashCode();
+		}
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/ExposedFieldsAggregationOperationContext.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2013-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import org.springframework.data.mongodb.core.aggregation.ExposedFields.ExposedField;
+import org.springframework.data.mongodb.core.aggregation.ExposedFields.FieldReference;
+import org.springframework.util.Assert;
+
+import com.mongodb.DBObject;
+
+/**
+ * {@link AggregationOperationContext} that combines the available field references from a given
+ * {@code AggregationOperationContext} and an {@link FieldsExposingAggregationOperation}.
+ * 
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ * @since 1.4
+ */
+class ExposedFieldsAggregationOperationContext implements AggregationOperationContext {
+
+	private final ExposedFields exposedFields;
+	private final AggregationOperationContext rootContext;
+
+	/**
+	 * Creates a new {@link ExposedFieldsAggregationOperationContext} from the given {@link ExposedFields}. Uses the given
+	 * {@link AggregationOperationContext} to perform a mapping to mongo types if necessary.
+	 * 
+	 * @param exposedFields must not be {@literal null}.
+	 * @param rootContext must not be {@literal null}.
+	 */
+	public ExposedFieldsAggregationOperationContext(ExposedFields exposedFields, AggregationOperationContext rootContext) {
+
+		Assert.notNull(exposedFields, "ExposedFields must not be null!");
+		Assert.notNull(rootContext, "RootContext must not be null!");
+
+		this.exposedFields = exposedFields;
+		this.rootContext = rootContext;
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperationContext#getMappedObject(com.mongodb.DBObject)
+	 */
+	@Override
+	public DBObject getMappedObject(DBObject dbObject) {
+		return rootContext.getMappedObject(dbObject);
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperationContext#getReference(org.springframework.data.mongodb.core.aggregation.ExposedFields.AvailableField)
+	 */
+	@Override
+	public FieldReference getReference(Field field) {
+		return getReference(field, field.getTarget());
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperationContext#getReference(java.lang.String)
+	 */
+	@Override
+	public FieldReference getReference(String name) {
+		return getReference(null, name);
+	}
+
+	/**
+	 * Returns a {@link FieldReference} to the given {@link Field} with the given {@code name}.
+	 * 
+	 * @param field may be {@literal null}
+	 * @param name must not be {@literal null}
+	 * @return
+	 */
+	private FieldReference getReference(Field field, String name) {
+
+		Assert.notNull(name, "Name must not be null!");
+
+		ExposedField exposedField = exposedFields.getField(name);
+
+		if (exposedField != null) {
+
+			if (field != null) {
+				// we return a FieldReference to the given field directly to make sure that we reference the proper alias here.
+				return new FieldReference(new ExposedField(field, exposedField.isSynthetic()));
+			}
+
+			return new FieldReference(exposedField);
+		}
+
+		if (name.contains(".")) {
+
+			// for nested field references we only check that the root field exists.
+			ExposedField rootField = exposedFields.getField(name.split("\\.")[0]);
+
+			if (rootField != null) {
+
+				// We have to synthetic to true, in order to render the field-name as is.
+				return new FieldReference(new ExposedField(name, true));
+			}
+		}
+
+		throw new IllegalArgumentException(String.format("Invalid reference '%s'!", name));
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/Field.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+/**
+ * Abstraction for a field.
+ * 
+ * @author Oliver Gierke
+ * @since 1.3
+ */
+public interface Field {
+
+	/**
+	 * Returns the name of the field.
+	 * 
+	 * @return must not be {@literal null}.
+	 */
+	String getName();
+
+	/**
+	 * Returns the target of the field. In case no explicit target is available {@link #getName()} should be returned.
+	 * 
+	 * @return must not be {@literal null}.
+	 */
+	String getTarget();
+
+	/**
+	 * Returns whether the Field is aliased, which means it has a name set different from the target.
+	 * 
+	 * @return
+	 */
+	boolean isAliased();
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/Fields.java

@@ -0,0 +1,298 @@
+/*
+ * Copyright 2013-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+import org.springframework.util.Assert;
+import org.springframework.util.ObjectUtils;
+import org.springframework.util.StringUtils;
+
+/**
+ * Value object to capture a list of {@link Field} instances.
+ * 
+ * @author Oliver Gierke
+ * @author Thomas Darimont
+ * @since 1.3
+ */
+public final class Fields implements Iterable<Field> {
+
+	private static final String AMBIGUOUS_EXCEPTION = "Found two fields both using '%s' as name: %s and %s! Please "
+			+ "customize your field definitions to get to unique field names!";
+
+	public static final String UNDERSCORE_ID = "_id";
+	public static final String UNDERSCORE_ID_REF = "$_id";
+
+	private final List<Field> fields;
+
+	/**
+	 * Creates a new {@link Fields} instance from the given {@link Fields}.
+	 * 
+	 * @param fields must not be {@literal null} or empty.
+	 * @return
+	 */
+	public static Fields from(Field... fields) {
+
+		Assert.notNull(fields, "Fields must not be null!");
+		return new Fields(Arrays.asList(fields));
+	}
+
+	/**
+	 * Creates a new {@link Fields} instance for {@link Field}s with the given names.
+	 * 
+	 * @param names must not be {@literal null}.
+	 * @return
+	 */
+	public static Fields fields(String... names) {
+
+		Assert.notNull(names, "Field names must not be null!");
+
+		List<Field> fields = new ArrayList<Field>();
+
+		for (String name : names) {
+			fields.add(field(name));
+		}
+
+		return new Fields(fields);
+	}
+
+	/**
+	 * Creates a {@link Field} with the given name.
+	 * 
+	 * @param name must not be {@literal null} or empty.
+	 * @return
+	 */
+	public static Field field(String name) {
+		return new AggregationField(name);
+	}
+
+	public static Field field(String name, String target) {
+		Assert.hasText(target, "Target must not be null or empty!");
+		return new AggregationField(name, target);
+	}
+
+	/**
+	 * Creates a new {@link Fields} instance using the given {@link Field}s.
+	 * 
+	 * @param fields must not be {@literal null}.
+	 */
+	private Fields(List<Field> fields) {
+
+		Assert.notNull(fields, "Fields must not be null!");
+
+		this.fields = verify(fields);
+	}
+
+	private static final List<Field> verify(List<Field> fields) {
+
+		Map<String, Field> reference = new HashMap<String, Field>();
+
+		for (Field field : fields) {
+
+			String name = field.getName();
+			Field found = reference.get(name);
+
+			if (found != null) {
+				throw new IllegalArgumentException(String.format(AMBIGUOUS_EXCEPTION, name, found, field));
+			}
+
+			reference.put(name, field);
+		}
+
+		return fields;
+	}
+
+	private Fields(Fields existing, Field tail) {
+
+		this.fields = new ArrayList<Field>(existing.fields.size() + 1);
+		this.fields.addAll(existing.fields);
+		this.fields.add(tail);
+	}
+
+	/**
+	 * Creates a new {@link Fields} instance with a new {@link Field} of the given name added.
+	 * 
+	 * @param name must not be {@literal null}.
+	 * @return
+	 */
+	public Fields and(String name) {
+		return and(new AggregationField(name));
+	}
+
+	public Fields and(String name, String target) {
+		return and(new AggregationField(name, target));
+	}
+
+	public Fields and(Field field) {
+		return new Fields(this, field);
+	}
+
+	public Fields and(Fields fields) {
+
+		Fields result = this;
+
+		for (Field field : fields) {
+			result = result.and(field);
+		}
+
+		return result;
+	}
+
+	public Field getField(String name) {
+
+		for (Field field : fields) {
+			if (field.getName().equals(name)) {
+				return field;
+			}
+		}
+
+		return null;
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see java.lang.Iterable#iterator()
+	 */
+	@Override
+	public Iterator<Field> iterator() {
+		return fields.iterator();
+	}
+
+	/**
+	 * Value object to encapsulate a field in an aggregation operation.
+	 * 
+	 * @author Oliver Gierke
+	 */
+	static class AggregationField implements Field {
+
+		private final String name;
+		private final String target;
+
+		/**
+		 * Creates an aggregation field with the given name. As no target is set explicitly, the name will be used as target
+		 * as well.
+		 * 
+		 * @param key
+		 */
+		public AggregationField(String key) {
+			this(key, null);
+		}
+
+		public AggregationField(String name, String target) {
+
+			String nameToSet = cleanUp(name);
+			String targetToSet = cleanUp(target);
+
+			Assert.hasText(nameToSet, "AggregationField name must not be null or empty!");
+
+			if (target == null && name.contains(".")) {
+				this.name = nameToSet.substring(nameToSet.indexOf('.') + 1);
+				this.target = nameToSet;
+			} else {
+				this.name = nameToSet;
+				this.target = targetToSet;
+			}
+		}
+
+		private static final String cleanUp(String source) {
+
+			if (source == null) {
+				return source;
+			}
+
+			if (Aggregation.SystemVariable.isReferingToSystemVariable(source)) {
+				return source;
+			}
+
+			int dollarIndex = source.lastIndexOf('$');
+			return dollarIndex == -1 ? source : source.substring(dollarIndex + 1);
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.Field#getKey()
+		 */
+		public String getName() {
+			return name;
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.Field#getAlias()
+		 */
+		public String getTarget() {
+			return StringUtils.hasText(this.target) ? this.target : this.name;
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.Field#isAliased()
+		 */
+		@Override
+		public boolean isAliased() {
+			return !getName().equals(getTarget());
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see java.lang.Object#toString()
+		 */
+		@Override
+		public String toString() {
+			return String.format("AggregationField - name: %s, target: %s", name, target);
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see java.lang.Object#equals(java.lang.Object)
+		 */
+		@Override
+		public boolean equals(Object obj) {
+
+			if (this == obj) {
+				return true;
+			}
+
+			if (!(obj instanceof AggregationField)) {
+				return false;
+			}
+
+			AggregationField that = (AggregationField) obj;
+
+			return this.name.equals(that.name) && ObjectUtils.nullSafeEquals(this.target, that.target);
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see java.lang.Object#hashCode()
+		 */
+		@Override
+		public int hashCode() {
+
+			int result = 17;
+
+			result += 31 * name.hashCode();
+			result += 31 * ObjectUtils.nullSafeHashCode(target);
+
+			return result;
+		}
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/FieldsExposingAggregationOperation.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+/**
+ * {@link AggregationOperation} that exposes new {@link ExposedFields} that can be used for later aggregation pipeline
+ * {@code AggregationOperation}s.
+ * 
+ * @author Thomas Darimont
+ */
+public interface FieldsExposingAggregationOperation extends AggregationOperation {
+
+	/**
+	 * Returns the fields exposed by the {@link AggregationOperation}.
+	 * 
+	 * @return will never be {@literal null}.
+	 */
+	ExposedFields getFields();
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/GeoNearOperation.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import org.springframework.data.mongodb.core.query.NearQuery;
+import org.springframework.util.Assert;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+
+/**
+ * @author Thomas Darimont
+ * @since 1.3
+ */
+public class GeoNearOperation implements AggregationOperation {
+
+	private final NearQuery nearQuery;
+
+	public GeoNearOperation(NearQuery nearQuery) {
+
+		Assert.notNull(nearQuery);
+		this.nearQuery = nearQuery;
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperation#toDBObject(org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+	 */
+	@Override
+	public DBObject toDBObject(AggregationOperationContext context) {
+		return new BasicDBObject("$geoNear", context.getMappedObject(nearQuery.toDBObject()));
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/GroupOperation.java

@@ -0,0 +1,384 @@
+/*
+ * Copyright 2013-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Locale;
+
+import org.springframework.data.mongodb.core.aggregation.ExposedFields.ExposedField;
+import org.springframework.data.mongodb.core.aggregation.ExposedFields.FieldReference;
+import org.springframework.util.Assert;
+import org.springframework.util.StringUtils;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+
+/**
+ * Encapsulates the aggregation framework {@code $group}-operation.
+ * 
+ * @see http://docs.mongodb.org/manual/reference/aggregation/group/#stage._S_group
+ * @author Sebastian Herold
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ * @since 1.3
+ */
+public class GroupOperation implements FieldsExposingAggregationOperation {
+
+	/**
+	 * Holds the non-synthetic fields which are the fields of the group-id structure.
+	 */
+	private final ExposedFields idFields;
+
+	private final List<Operation> operations;
+
+	/**
+	 * Creates a new {@link GroupOperation} including the given {@link Fields}.
+	 * 
+	 * @param fields must not be {@literal null}.
+	 */
+	public GroupOperation(Fields fields) {
+
+		this.idFields = ExposedFields.nonSynthetic(fields);
+		this.operations = new ArrayList<Operation>();
+	}
+
+	/**
+	 * Creates a new {@link GroupOperation} from the given {@link GroupOperation}.
+	 * 
+	 * @param groupOperation must not be {@literal null}.
+	 */
+	protected GroupOperation(GroupOperation groupOperation) {
+		this(groupOperation, Collections.<Operation> emptyList());
+	}
+
+	/**
+	 * Creates a new {@link GroupOperation} from the given {@link GroupOperation} and the given {@link Operation}s.
+	 * 
+	 * @param groupOperation
+	 * @param nextOperations
+	 */
+	private GroupOperation(GroupOperation groupOperation, List<Operation> nextOperations) {
+
+		Assert.notNull(groupOperation, "GroupOperation must not be null!");
+		Assert.notNull(nextOperations, "NextOperations must not be null!");
+
+		this.idFields = groupOperation.idFields;
+		this.operations = new ArrayList<Operation>(nextOperations.size() + 1);
+		this.operations.addAll(groupOperation.operations);
+		this.operations.addAll(nextOperations);
+	}
+
+	/**
+	 * Creates a new {@link GroupOperation} from the current one adding the given {@link Operation}.
+	 * 
+	 * @param operation must not be {@literal null}.
+	 * @return
+	 */
+	protected GroupOperation and(Operation operation) {
+		return new GroupOperation(this, Arrays.asList(operation));
+	}
+
+	/**
+	 * Builder for {@link GroupOperation}s on a field.
+	 * 
+	 * @author Thomas Darimont
+	 */
+	public static final class GroupOperationBuilder {
+
+		private final GroupOperation groupOperation;
+		private final Operation operation;
+
+		/**
+		 * Creates a new {@link GroupOperationBuilder} from the given {@link GroupOperation} and {@link Operation}.
+		 * 
+		 * @param groupOperation
+		 * @param operation
+		 */
+		private GroupOperationBuilder(GroupOperation groupOperation, Operation operation) {
+
+			Assert.notNull(groupOperation, "GroupOperation must not be null!");
+			Assert.notNull(operation, "Operation must not be null!");
+
+			this.groupOperation = groupOperation;
+			this.operation = operation;
+		}
+
+		/**
+		 * Allows to specify an alias for the new-operation operation.
+		 * 
+		 * @param alias
+		 * @return
+		 */
+		public GroupOperation as(String alias) {
+			return this.groupOperation.and(operation.withAlias(alias));
+		}
+	}
+
+	/**
+	 * Generates an {@link GroupOperationBuilder} for a {@code $sum}-expression.
+	 * <p>
+	 * Count expressions are emulated via {@code $sum: 1}.
+	 * <p>
+	 * 
+	 * @return
+	 */
+	public GroupOperationBuilder count() {
+		return newBuilder(GroupOps.SUM, null, 1);
+	}
+
+	/**
+	 * Generates an {@link GroupOperationBuilder} for a {@code $sum}-expression for the given field-reference.
+	 * 
+	 * @param reference
+	 * @return
+	 */
+	public GroupOperationBuilder sum(String reference) {
+		return sum(reference, null);
+	}
+
+	private GroupOperationBuilder sum(String reference, Object value) {
+		return newBuilder(GroupOps.SUM, reference, value);
+	}
+
+	/**
+	 * Generates an {@link GroupOperationBuilder} for an {@code $add_to_set}-expression for the given field-reference.
+	 * 
+	 * @param reference
+	 * @return
+	 */
+	public GroupOperationBuilder addToSet(String reference) {
+		return addToSet(reference, null);
+	}
+
+	/**
+	 * Generates an {@link GroupOperationBuilder} for an {@code $add_to_set}-expression for the given value.
+	 * 
+	 * @param value
+	 * @return
+	 */
+	public GroupOperationBuilder addToSet(Object value) {
+		return addToSet(null, value);
+	}
+
+	private GroupOperationBuilder addToSet(String reference, Object value) {
+		return newBuilder(GroupOps.ADD_TO_SET, reference, value);
+	}
+
+	/**
+	 * Generates an {@link GroupOperationBuilder} for an {@code $last}-expression for the given field-reference.
+	 * 
+	 * @param reference
+	 * @return
+	 */
+	public GroupOperationBuilder last(String reference) {
+		return newBuilder(GroupOps.LAST, reference, null);
+	}
+
+	/**
+	 * Generates an {@link GroupOperationBuilder} for a {@code $first}-expression for the given field-reference.
+	 * 
+	 * @param reference
+	 * @return
+	 */
+	public GroupOperationBuilder first(String reference) {
+		return newBuilder(GroupOps.FIRST, reference, null);
+	}
+
+	/**
+	 * Generates an {@link GroupOperationBuilder} for an {@code $avg}-expression for the given field-reference.
+	 * 
+	 * @param reference
+	 * @return
+	 */
+	public GroupOperationBuilder avg(String reference) {
+		return newBuilder(GroupOps.AVG, reference, null);
+	}
+
+	/**
+	 * Generates an {@link GroupOperationBuilder} for an {@code $push}-expression for the given field-reference.
+	 * 
+	 * @param reference
+	 * @return
+	 */
+	public GroupOperationBuilder push(String reference) {
+		return push(reference, null);
+	}
+
+	/**
+	 * Generates an {@link GroupOperationBuilder} for an {@code $push}-expression for the given value.
+	 * 
+	 * @param value
+	 * @return
+	 */
+	public GroupOperationBuilder push(Object value) {
+		return push(null, value);
+	}
+
+	private GroupOperationBuilder push(String reference, Object value) {
+		return newBuilder(GroupOps.PUSH, reference, value);
+	}
+
+	/**
+	 * Generates an {@link GroupOperationBuilder} for an {@code $min}-expression that for the given field-reference.
+	 * 
+	 * @param reference
+	 * @return
+	 */
+	public GroupOperationBuilder min(String reference) {
+		return newBuilder(GroupOps.MIN, reference, null);
+	}
+
+	/**
+	 * Generates an {@link GroupOperationBuilder} for an {@code $max}-expression that for the given field-reference.
+	 * 
+	 * @param reference
+	 * @return
+	 */
+	public GroupOperationBuilder max(String reference) {
+		return newBuilder(GroupOps.MAX, reference, null);
+	}
+
+	private GroupOperationBuilder newBuilder(Keyword keyword, String reference, Object value) {
+		return new GroupOperationBuilder(this, new Operation(keyword, null, reference, value));
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperationContext#getFields()
+	 */
+	@Override
+	public ExposedFields getFields() {
+
+		ExposedFields fields = this.idFields.and(new ExposedField(Fields.UNDERSCORE_ID, true));
+
+		for (Operation operation : operations) {
+			fields = fields.and(operation.asField());
+		}
+
+		return fields;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperation#toDBObject(org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+	 */
+	@Override
+	public com.mongodb.DBObject toDBObject(AggregationOperationContext context) {
+
+		BasicDBObject operationObject = new BasicDBObject();
+
+		if (idFields.exposesNoNonSyntheticFields()) {
+
+			operationObject.put(Fields.UNDERSCORE_ID, null);
+
+		} else if (idFields.exposesSingleNonSyntheticFieldOnly()) {
+
+			FieldReference reference = context.getReference(idFields.iterator().next());
+			operationObject.put(Fields.UNDERSCORE_ID, reference.toString());
+
+		} else {
+
+			BasicDBObject inner = new BasicDBObject();
+
+			for (ExposedField field : idFields) {
+				FieldReference reference = context.getReference(field);
+				inner.put(field.getName(), reference.toString());
+			}
+
+			operationObject.put(Fields.UNDERSCORE_ID, inner);
+		}
+
+		for (Operation operation : operations) {
+			operationObject.putAll(operation.toDBObject(context));
+		}
+
+		return new BasicDBObject("$group", operationObject);
+	}
+
+	interface Keyword {
+
+		String toString();
+	}
+
+	private static enum GroupOps implements Keyword {
+
+		SUM, LAST, FIRST, PUSH, AVG, MIN, MAX, ADD_TO_SET, COUNT;
+
+		@Override
+		public String toString() {
+
+			String[] parts = name().split("_");
+
+			StringBuilder builder = new StringBuilder();
+
+			for (String part : parts) {
+				String lowerCase = part.toLowerCase(Locale.US);
+				builder.append(builder.length() == 0 ? lowerCase : StringUtils.capitalize(lowerCase));
+			}
+
+			return "$" + builder.toString();
+		}
+	}
+
+	static class Operation implements AggregationOperation {
+
+		private final Keyword op;
+		private final String key;
+		private final String reference;
+		private final Object value;
+
+		public Operation(Keyword op, String key, String reference, Object value) {
+
+			this.op = op;
+			this.key = key;
+			this.reference = reference;
+			this.value = value;
+		}
+
+		public Operation withAlias(String key) {
+			return new Operation(op, key, reference, value);
+		}
+
+		public ExposedField asField() {
+			return new ExposedField(key, true);
+		}
+
+		public DBObject toDBObject(AggregationOperationContext context) {
+			return new BasicDBObject(key, new BasicDBObject(op.toString(), getValue(context)));
+		}
+
+		public Object getValue(AggregationOperationContext context) {
+
+			if (reference == null) {
+				return value;
+			}
+
+			if (Aggregation.SystemVariable.isReferingToSystemVariable(reference)) {
+				return reference;
+			}
+
+			return context.getReference(reference).toString();
+		}
+
+		@Override
+		public String toString() {
+			return "Operation [op=" + op + ", key=" + key + ", reference=" + reference + ", value=" + value + "]";
+		}
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/LimitOperation.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import org.springframework.util.Assert;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+
+/**
+ * Encapsulates the {@code $limit}-operation
+ * 
+ * @see http://docs.mongodb.org/manual/reference/aggregation/limit/
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ * @since 1.3
+ */
+class LimitOperation implements AggregationOperation {
+
+	private final long maxElements;
+
+	/**
+	 * @param maxElements Number of documents to consider.
+	 */
+	public LimitOperation(long maxElements) {
+
+		Assert.isTrue(maxElements >= 0, "Maximum number of elements must be greater or equal to zero!");
+		this.maxElements = maxElements;
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperation#toDBObject(org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+	 */
+	@Override
+	public DBObject toDBObject(AggregationOperationContext context) {
+		return new BasicDBObject("$limit", maxElements);
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/MatchOperation.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import org.springframework.data.mongodb.core.query.Criteria;
+import org.springframework.util.Assert;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+
+/**
+ * Encapsulates the {@code $match}-operation
+ * 
+ * @see http://docs.mongodb.org/manual/reference/aggregation/match/
+ * @author Sebastian Herold
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ * @since 1.3
+ */
+public class MatchOperation implements AggregationOperation {
+
+	private final Criteria criteria;
+
+	/**
+	 * Creates a new {@link MatchOperation} for the given {@link Criteria}.
+	 * 
+	 * @param criteria must not be {@literal null}.
+	 */
+	public MatchOperation(Criteria criteria) {
+
+		Assert.notNull(criteria, "Criteria must not be null!");
+		this.criteria = criteria;
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperation#toDBObject(org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+	 */
+	@Override
+	public DBObject toDBObject(AggregationOperationContext context) {
+		return new BasicDBObject("$match", context.getMappedObject(criteria.getCriteriaObject()));
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/ProjectionOperation.java

@@ -0,0 +1,940 @@
+/*
+ * Copyright 2013-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import org.springframework.data.mongodb.core.aggregation.ExposedFields.ExposedField;
+import org.springframework.data.mongodb.core.aggregation.ProjectionOperation.ProjectionOperationBuilder.FieldProjection;
+import org.springframework.util.Assert;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+
+/**
+ * Encapsulates the aggregation framework {@code $project}-operation. Projection of field to be used in an
+ * {@link Aggregation}. A projection is similar to a {@link Field} inclusion/exclusion but more powerful. It can
+ * generate new fields, change values of given field etc.
+ * <p>
+ * 
+ * @see http://docs.mongodb.org/manual/reference/aggregation/project/
+ * @author Tobias Trelle
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ * @since 1.3
+ */
+public class ProjectionOperation implements FieldsExposingAggregationOperation {
+
+	private static final List<Projection> NONE = Collections.emptyList();
+	private static final String EXCLUSION_ERROR = "Exclusion of field %s not allowed. Projections by the mongodb "
+			+ "aggregation framework only support the exclusion of the %s field!";
+
+	private final List<Projection> projections;
+
+	/**
+	 * Creates a new empty {@link ProjectionOperation}.
+	 */
+	public ProjectionOperation() {
+		this(NONE, NONE);
+	}
+
+	/**
+	 * Creates a new {@link ProjectionOperation} including the given {@link Fields}.
+	 * 
+	 * @param fields must not be {@literal null}.
+	 */
+	public ProjectionOperation(Fields fields) {
+		this(NONE, ProjectionOperationBuilder.FieldProjection.from(fields));
+	}
+
+	/**
+	 * Copy constructor to allow building up {@link ProjectionOperation} instances from already existing
+	 * {@link Projection}s.
+	 * 
+	 * @param current must not be {@literal null}.
+	 * @param projections must not be {@literal null}.
+	 */
+	private ProjectionOperation(List<? extends Projection> current, List<? extends Projection> projections) {
+
+		Assert.notNull(current, "Current projections must not be null!");
+		Assert.notNull(projections, "Projections must not be null!");
+
+		this.projections = new ArrayList<ProjectionOperation.Projection>(current.size() + projections.size());
+		this.projections.addAll(current);
+		this.projections.addAll(projections);
+	}
+
+	/**
+	 * Creates a new {@link ProjectionOperation} with the current {@link Projection}s and the given one.
+	 * 
+	 * @param projection must not be {@literal null}.
+	 * @return
+	 */
+	private ProjectionOperation and(Projection projection) {
+		return new ProjectionOperation(this.projections, Arrays.asList(projection));
+	}
+
+	/**
+	 * Creates a new {@link ProjectionOperation} with the current {@link Projection}s replacing the last current one with
+	 * the given one.
+	 * 
+	 * @param projection must not be {@literal null}.
+	 * @return
+	 */
+	private ProjectionOperation andReplaceLastOneWith(Projection projection) {
+
+		List<Projection> projections = this.projections.isEmpty() ? Collections.<Projection> emptyList() : this.projections
+				.subList(0, this.projections.size() - 1);
+		return new ProjectionOperation(projections, Arrays.asList(projection));
+	}
+
+	/**
+	 * Creates a new {@link ProjectionOperationBuilder} to define a projection for the field with the given name.
+	 * 
+	 * @param name must not be {@literal null} or empty.
+	 * @return
+	 */
+	public ProjectionOperationBuilder and(String name) {
+		return new ProjectionOperationBuilder(name, this, null);
+	}
+
+	public ExpressionProjectionOperationBuilder andExpression(String expression, Object... params) {
+		return new ExpressionProjectionOperationBuilder(expression, this, params);
+	}
+
+	/**
+	 * Excludes the given fields from the projection.
+	 * 
+	 * @param fieldNames must not be {@literal null}.
+	 * @return
+	 */
+	public ProjectionOperation andExclude(String... fieldNames) {
+
+		for (String fieldName : fieldNames) {
+			Assert.isTrue(Fields.UNDERSCORE_ID.equals(fieldName),
+					String.format(EXCLUSION_ERROR, fieldName, Fields.UNDERSCORE_ID));
+		}
+
+		List<FieldProjection> excludeProjections = FieldProjection.from(Fields.fields(fieldNames), false);
+		return new ProjectionOperation(this.projections, excludeProjections);
+	}
+
+	/**
+	 * Includes the given fields into the projection.
+	 * 
+	 * @param fieldNames must not be {@literal null}.
+	 * @return
+	 */
+	public ProjectionOperation andInclude(String... fieldNames) {
+
+		List<FieldProjection> projections = FieldProjection.from(Fields.fields(fieldNames), true);
+		return new ProjectionOperation(this.projections, projections);
+	}
+
+	/**
+	 * Includes the given fields into the projection.
+	 * 
+	 * @param fields must not be {@literal null}.
+	 * @return
+	 */
+	public ProjectionOperation andInclude(Fields fields) {
+		return new ProjectionOperation(this.projections, FieldProjection.from(fields, true));
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.FieldsExposingAggregationOperation#getFields()
+	 */
+	@Override
+	public ExposedFields getFields() {
+
+		ExposedFields fields = null;
+
+		for (Projection projection : projections) {
+			ExposedField field = projection.getExposedField();
+			fields = fields == null ? ExposedFields.from(field) : fields.and(field);
+		}
+
+		return fields;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperation#toDBObject(org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+	 */
+	@Override
+	public DBObject toDBObject(AggregationOperationContext context) {
+
+		BasicDBObject fieldObject = new BasicDBObject();
+
+		for (Projection projection : projections) {
+			fieldObject.putAll(projection.toDBObject(context));
+		}
+
+		return new BasicDBObject("$project", fieldObject);
+	}
+
+	/**
+	 * Base class for {@link ProjectionOperationBuilder}s.
+	 * 
+	 * @author Thomas Darimont
+	 */
+	private static abstract class AbstractProjectionOperationBuilder implements AggregationOperation {
+
+		protected final Object value;
+		protected final ProjectionOperation operation;
+
+		/**
+		 * Creates a new {@link AbstractProjectionOperationBuilder} fot the given value and {@link ProjectionOperation}.
+		 * 
+		 * @param value must not be {@literal null}.
+		 * @param operation must not be {@literal null}.
+		 */
+		public AbstractProjectionOperationBuilder(Object value, ProjectionOperation operation) {
+
+			Assert.notNull(value, "value must not be null or empty!");
+			Assert.notNull(operation, "ProjectionOperation must not be null!");
+
+			this.value = value;
+			this.operation = operation;
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperation#toDBObject(org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+		 */
+		@Override
+		public DBObject toDBObject(AggregationOperationContext context) {
+			return this.operation.toDBObject(context);
+		}
+
+		/**
+		 * Returns the finally to be applied {@link ProjectionOperation} with the given alias.
+		 * 
+		 * @param alias will never be {@literal null} or empty.
+		 * @return
+		 */
+		public abstract ProjectionOperation as(String alias);
+	}
+
+	/**
+	 * An {@link ProjectionOperationBuilder} that is used for SpEL expression based projections.
+	 * 
+	 * @author Thomas Darimont
+	 */
+	public static class ExpressionProjectionOperationBuilder extends ProjectionOperationBuilder {
+
+		private final Object[] params;
+		private final String expression;
+
+		/**
+		 * Creates a new {@link ExpressionProjectionOperationBuilder} for the given value, {@link ProjectionOperation} and
+		 * parameters.
+		 * 
+		 * @param expression must not be {@literal null}.
+		 * @param operation must not be {@literal null}.
+		 * @param parameters
+		 */
+		public ExpressionProjectionOperationBuilder(String expression, ProjectionOperation operation, Object[] parameters) {
+
+			super(expression, operation, null);
+			this.expression = expression;
+			this.params = parameters.clone();
+		}
+
+		/* (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.ProjectionOperation.ProjectionOperationBuilder#project(java.lang.String, java.lang.Object[])
+		 */
+		@Override
+		public ProjectionOperationBuilder project(String operation, final Object... values) {
+
+			OperationProjection operationProjection = new OperationProjection(Fields.field(value.toString()), operation,
+					values) {
+				@Override
+				protected List<Object> getOperationArguments(AggregationOperationContext context) {
+
+					List<Object> result = new ArrayList<Object>(values.length + 1);
+					result.add(ExpressionProjection.toMongoExpression(context,
+							ExpressionProjectionOperationBuilder.this.expression, ExpressionProjectionOperationBuilder.this.params));
+					result.addAll(Arrays.asList(values));
+
+					return result;
+				}
+			};
+
+			return new ProjectionOperationBuilder(value, this.operation.and(operationProjection), operationProjection);
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.ProjectionOperation.AbstractProjectionOperationBuilder#as(java.lang.String)
+		 */
+		@Override
+		public ProjectionOperation as(String alias) {
+
+			Field expressionField = Fields.field(alias, alias);
+			return this.operation.and(new ExpressionProjection(expressionField, this.value.toString(), params));
+		}
+
+		/**
+		 * A {@link Projection} based on a SpEL expression.
+		 * 
+		 * @author Thomas Darimont
+		 * @author Oliver Gierke
+		 */
+		static class ExpressionProjection extends Projection {
+
+			private static final SpelExpressionTransformer TRANSFORMER = new SpelExpressionTransformer();
+
+			private final String expression;
+			private final Object[] params;
+
+			/**
+			 * Creates a new {@link ExpressionProjection} for the given field, SpEL expression and parameters.
+			 * 
+			 * @param field must not be {@literal null}.
+			 * @param expression must not be {@literal null} or empty.
+			 * @param parameters must not be {@literal null}.
+			 */
+			public ExpressionProjection(Field field, String expression, Object[] parameters) {
+
+				super(field);
+
+				Assert.hasText(expression, "Expression must not be null!");
+				Assert.notNull(parameters, "Parameters must not be null!");
+
+				this.expression = expression;
+				this.params = parameters.clone();
+			}
+
+			/* 
+			 * (non-Javadoc)
+			 * @see org.springframework.data.mongodb.core.aggregation.ProjectionOperation.Projection#toDBObject(org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+			 */
+			@Override
+			public DBObject toDBObject(AggregationOperationContext context) {
+				return new BasicDBObject(getExposedField().getName(), toMongoExpression(context, expression, params));
+			}
+
+			protected static Object toMongoExpression(AggregationOperationContext context, String expression, Object[] params) {
+				return TRANSFORMER.transform(expression, context, params);
+			}
+		}
+	}
+
+	/**
+	 * Builder for {@link ProjectionOperation}s on a field.
+	 * 
+	 * @author Oliver Gierke
+	 * @author Thomas Darimont
+	 */
+	public static class ProjectionOperationBuilder extends AbstractProjectionOperationBuilder {
+
+		private static final String NUMBER_NOT_NULL = "Number must not be null!";
+		private static final String FIELD_REFERENCE_NOT_NULL = "Field reference must not be null!";
+
+		private final String name;
+		private final OperationProjection previousProjection;
+
+		/**
+		 * Creates a new {@link ProjectionOperationBuilder} for the field with the given name on top of the given
+		 * {@link ProjectionOperation}.
+		 * 
+		 * @param name must not be {@literal null} or empty.
+		 * @param operation must not be {@literal null}.
+		 * @param previousProjection the previous operation projection, may be {@literal null}.
+		 */
+		public ProjectionOperationBuilder(String name, ProjectionOperation operation, OperationProjection previousProjection) {
+			super(name, operation);
+
+			this.name = name;
+			this.previousProjection = previousProjection;
+		}
+
+		/**
+		 * Creates a new {@link ProjectionOperationBuilder} for the field with the given value on top of the given
+		 * {@link ProjectionOperation}.
+		 * 
+		 * @param value
+		 * @param operation
+		 * @param previousProjection
+		 */
+		protected ProjectionOperationBuilder(Object value, ProjectionOperation operation,
+				OperationProjection previousProjection) {
+
+			super(value, operation);
+
+			this.name = null;
+			this.previousProjection = previousProjection;
+		}
+
+		/**
+		 * Projects the result of the previous operation onto the current field. Will automatically add an exclusion for
+		 * {@code _id} as what would be held in it by default will now go into the field just projected into.
+		 * 
+		 * @return
+		 */
+		public ProjectionOperation previousOperation() {
+
+			return this.operation.andExclude(Fields.UNDERSCORE_ID) //
+					.and(new PreviousOperationProjection(name));
+		}
+
+		/**
+		 * Defines a nested field binding for the current field.
+		 * 
+		 * @param fields must not be {@literal null}.
+		 * @return
+		 */
+		public ProjectionOperation nested(Fields fields) {
+			return this.operation.and(new NestedFieldProjection(name, fields));
+		}
+
+		/**
+		 * Allows to specify an alias for the previous projection operation.
+		 * 
+		 * @param string
+		 * @return
+		 */
+		@Override
+		public ProjectionOperation as(String alias) {
+
+			if (this.previousProjection != null) {
+				return this.operation.andReplaceLastOneWith(this.previousProjection.withAlias(alias));
+			} else {
+				return this.operation.and(new FieldProjection(Fields.field(alias, name), null));
+			}
+		}
+
+		/**
+		 * Generates an {@code $add} expression that adds the given number to the previously mentioned field.
+		 * 
+		 * @param number
+		 * @return
+		 */
+		public ProjectionOperationBuilder plus(Number number) {
+
+			Assert.notNull(number, NUMBER_NOT_NULL);
+			return project("add", number);
+		}
+
+		/**
+		 * Generates an {@code $add} expression that adds the value of the given field to the previously mentioned field.
+		 * 
+		 * @param fieldReference
+		 * @return
+		 */
+		public ProjectionOperationBuilder plus(String fieldReference) {
+
+			Assert.notNull(fieldReference, "Field reference must not be null!");
+			return project("add", Fields.field(fieldReference));
+		}
+
+		/**
+		 * Generates an {@code $subtract} expression that subtracts the given number to the previously mentioned field.
+		 * 
+		 * @param number
+		 * @return
+		 */
+		public ProjectionOperationBuilder minus(Number number) {
+
+			Assert.notNull(number, "Number must not be null!");
+			return project("subtract", number);
+		}
+
+		/**
+		 * Generates an {@code $subtract} expression that subtracts the value of the given field to the previously mentioned
+		 * field.
+		 * 
+		 * @param fieldReference
+		 * @return
+		 */
+		public ProjectionOperationBuilder minus(String fieldReference) {
+
+			Assert.notNull(fieldReference, FIELD_REFERENCE_NOT_NULL);
+			return project("subtract", Fields.field(fieldReference));
+		}
+
+		/**
+		 * Generates an {@code $multiply} expression that multiplies the given number with the previously mentioned field.
+		 * 
+		 * @param number
+		 * @return
+		 */
+		public ProjectionOperationBuilder multiply(Number number) {
+
+			Assert.notNull(number, NUMBER_NOT_NULL);
+			return project("multiply", number);
+		}
+
+		/**
+		 * Generates an {@code $multiply} expression that multiplies the value of the given field with the previously
+		 * mentioned field.
+		 * 
+		 * @param fieldReference
+		 * @return
+		 */
+		public ProjectionOperationBuilder multiply(String fieldReference) {
+
+			Assert.notNull(fieldReference, FIELD_REFERENCE_NOT_NULL);
+			return project("multiply", Fields.field(fieldReference));
+		}
+
+		/**
+		 * Generates an {@code $divide} expression that divides the previously mentioned field by the given number.
+		 * 
+		 * @param number
+		 * @return
+		 */
+		public ProjectionOperationBuilder divide(Number number) {
+
+			Assert.notNull(number, FIELD_REFERENCE_NOT_NULL);
+			Assert.isTrue(Math.abs(number.intValue()) != 0, "Number must not be zero!");
+			return project("divide", number);
+		}
+
+		/**
+		 * Generates an {@code $divide} expression that divides the value of the given field by the previously mentioned
+		 * field.
+		 * 
+		 * @param fieldReference
+		 * @return
+		 */
+		public ProjectionOperationBuilder divide(String fieldReference) {
+
+			Assert.notNull(fieldReference, FIELD_REFERENCE_NOT_NULL);
+			return project("divide", Fields.field(fieldReference));
+		}
+
+		/**
+		 * Generates an {@code $mod} expression that divides the previously mentioned field by the given number and returns
+		 * the remainder.
+		 * 
+		 * @param number
+		 * @return
+		 */
+		public ProjectionOperationBuilder mod(Number number) {
+
+			Assert.notNull(number, NUMBER_NOT_NULL);
+			Assert.isTrue(Math.abs(number.intValue()) != 0, "Number must not be zero!");
+			return project("mod", number);
+		}
+
+		/**
+		 * Generates an {@code $mod} expression that divides the value of the given field by the previously mentioned field
+		 * and returns the remainder.
+		 * 
+		 * @param fieldReference
+		 * @return
+		 */
+		public ProjectionOperationBuilder mod(String fieldReference) {
+
+			Assert.notNull(fieldReference, FIELD_REFERENCE_NOT_NULL);
+			return project("mod", Fields.field(fieldReference));
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperation#toDBObject(org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+		 */
+		@Override
+		public DBObject toDBObject(AggregationOperationContext context) {
+			return this.operation.toDBObject(context);
+		}
+
+		/**
+		 * Adds a generic projection for the current field.
+		 * 
+		 * @param operation the operation key, e.g. {@code $add}.
+		 * @param values the values to be set for the projection operation.
+		 * @return
+		 */
+		public ProjectionOperationBuilder project(String operation, Object... values) {
+			OperationProjection operationProjection = new OperationProjection(Fields.field(value.toString()), operation,
+					values);
+			return new ProjectionOperationBuilder(value, this.operation.and(operationProjection), operationProjection);
+		}
+
+		/**
+		 * A {@link Projection} to pull in the result of the previous operation.
+		 * 
+		 * @author Oliver Gierke
+		 */
+		static class PreviousOperationProjection extends Projection {
+
+			private final String name;
+
+			/**
+			 * Creates a new {@link PreviousOperationProjection} for the field with the given name.
+			 * 
+			 * @param name must not be {@literal null} or empty.
+			 */
+			public PreviousOperationProjection(String name) {
+				super(Fields.field(name));
+				this.name = name;
+			}
+
+			/* 
+			 * (non-Javadoc)
+			 * @see org.springframework.data.mongodb.core.aggregation.ProjectionOperation.Projection#toDBObject(org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+			 */
+			@Override
+			public DBObject toDBObject(AggregationOperationContext context) {
+				return new BasicDBObject(name, Fields.UNDERSCORE_ID_REF);
+			}
+		}
+
+		/**
+		 * A {@link FieldProjection} to map a result of a previous {@link AggregationOperation} to a new field.
+		 * 
+		 * @author Oliver Gierke
+		 * @author Thomas Darimont
+		 */
+		static class FieldProjection extends Projection {
+
+			private final Field field;
+			private final Object value;
+
+			/**
+			 * Creates a new {@link FieldProjection} for the field of the given name, assigning the given value.
+			 * 
+			 * @param name must not be {@literal null} or empty.
+			 * @param value
+			 */
+			public FieldProjection(String name, Object value) {
+				this(Fields.field(name), value);
+			}
+
+			private FieldProjection(Field field, Object value) {
+
+				super(field);
+
+				this.field = field;
+				this.value = value;
+			}
+
+			/**
+			 * Factory method to easily create {@link FieldProjection}s for the given {@link Fields}. Fields are projected as
+			 * references with their given name. A field {@code foo} will be projected as: {@code foo : 1 } .
+			 * 
+			 * @param fields the {@link Fields} to in- or exclude, must not be {@literal null}.
+			 * @return
+			 */
+			public static List<? extends Projection> from(Fields fields) {
+				return from(fields, null);
+			}
+
+			/**
+			 * Factory method to easily create {@link FieldProjection}s for the given {@link Fields}.
+			 * 
+			 * @param fields the {@link Fields} to in- or exclude, must not be {@literal null}.
+			 * @param value to use for the given field.
+			 * @return
+			 */
+			public static List<FieldProjection> from(Fields fields, Object value) {
+
+				Assert.notNull(fields, "Fields must not be null!");
+				List<FieldProjection> projections = new ArrayList<FieldProjection>();
+
+				for (Field field : fields) {
+					projections.add(new FieldProjection(field, value));
+				}
+
+				return projections;
+			}
+
+			/* 
+			 * (non-Javadoc)
+			 * @see org.springframework.data.mongodb.core.aggregation.ProjectionOperation.Projection#toDBObject(org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+			 */
+			@Override
+			public DBObject toDBObject(AggregationOperationContext context) {
+				return new BasicDBObject(field.getName(), renderFieldValue(context));
+			}
+
+			private Object renderFieldValue(AggregationOperationContext context) {
+
+				// implicit reference or explicit include?
+				if (value == null || Boolean.TRUE.equals(value)) {
+
+					if (Aggregation.SystemVariable.isReferingToSystemVariable(field.getTarget())) {
+						return field.getTarget();
+					}
+
+					// check whether referenced field exists in the context
+					return context.getReference(field).getReferenceValue();
+
+				} else if (Boolean.FALSE.equals(value)) {
+
+					// render field as excluded
+					return 0;
+				}
+
+				return value;
+			}
+		}
+
+		static class OperationProjection extends Projection {
+
+			private final Field field;
+			private final String operation;
+			private final List<Object> values;
+
+			/**
+			 * Creates a new {@link OperationProjection} for the given field.
+			 * 
+			 * @param field the name of the field to add the operation projection for, must not be {@literal null} or empty.
+			 * @param operation the actual operation key, must not be {@literal null} or empty.
+			 * @param values the values to pass into the operation, must not be {@literal null}.
+			 */
+			public OperationProjection(Field field, String operation, Object[] values) {
+
+				super(field);
+
+				Assert.hasText(operation, "Operation must not be null or empty!");
+				Assert.notNull(values, "Values must not be null!");
+
+				this.field = field;
+				this.operation = operation;
+				this.values = Arrays.asList(values);
+			}
+
+			/* 
+			 * (non-Javadoc)
+			 * @see org.springframework.data.mongodb.core.aggregation.ProjectionOperation.Projection#toDBObject(org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+			 */
+			@Override
+			public DBObject toDBObject(AggregationOperationContext context) {
+
+				DBObject inner = new BasicDBObject("$" + operation, getOperationArguments(context));
+
+				return new BasicDBObject(getField().getName(), inner);
+			}
+
+			protected List<Object> getOperationArguments(AggregationOperationContext context) {
+
+				List<Object> result = new ArrayList<Object>(values.size());
+				result.add(context.getReference(getField().getName()).toString());
+
+				for (Object element : values) {
+					result.add(element instanceof Field ? context.getReference((Field) element).toString() : element);
+				}
+
+				return result;
+			}
+
+			/**
+			 * Returns the field that holds the {@link OperationProjection}.
+			 * 
+			 * @return
+			 */
+			protected Field getField() {
+				return field;
+			}
+
+			/**
+			 * Creates a new instance of this {@link OperationProjection} with the given alias.
+			 * 
+			 * @param alias the alias to set
+			 * @return
+			 */
+			public OperationProjection withAlias(String alias) {
+
+				final Field aliasedField = Fields.field(alias, this.field.getName());
+				return new OperationProjection(aliasedField, operation, values.toArray()) {
+
+					/* (non-Javadoc)
+					 * @see org.springframework.data.mongodb.core.aggregation.ProjectionOperation.ProjectionOperationBuilder.OperationProjection#getField()
+					 */
+					@Override
+					protected Field getField() {
+						return aliasedField;
+					}
+
+					@Override
+					protected List<Object> getOperationArguments(AggregationOperationContext context) {
+
+						// We have to make sure that we use the arguments from the "previous" OperationProjection that we replace
+						// with this new instance.
+
+						return OperationProjection.this.getOperationArguments(context);
+					}
+				};
+			}
+		}
+
+		static class NestedFieldProjection extends Projection {
+
+			private final String name;
+			private final Fields fields;
+
+			public NestedFieldProjection(String name, Fields fields) {
+
+				super(Fields.field(name));
+				this.name = name;
+				this.fields = fields;
+			}
+
+			/* 
+			 * (non-Javadoc)
+			 * @see org.springframework.data.mongodb.core.aggregation.ProjectionOperation.Projection#toDBObject(org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+			 */
+			@Override
+			public DBObject toDBObject(AggregationOperationContext context) {
+
+				DBObject nestedObject = new BasicDBObject();
+
+				for (Field field : fields) {
+					nestedObject.put(field.getName(), context.getReference(field.getTarget()).toString());
+				}
+
+				return new BasicDBObject(name, nestedObject);
+			}
+		}
+
+		/**
+		 * Extracts the minute from a date expression.
+		 * 
+		 * @return
+		 */
+		public ProjectionOperationBuilder extractMinute() {
+			return project("minute");
+		}
+
+		/**
+		 * Extracts the hour from a date expression.
+		 * 
+		 * @return
+		 */
+		public ProjectionOperationBuilder extractHour() {
+			return project("hour");
+		}
+
+		/**
+		 * Extracts the second from a date expression.
+		 * 
+		 * @return
+		 */
+		public ProjectionOperationBuilder extractSecond() {
+			return project("second");
+		}
+
+		/**
+		 * Extracts the millisecond from a date expression.
+		 * 
+		 * @return
+		 */
+		public ProjectionOperationBuilder extractMillisecond() {
+			return project("millisecond");
+		}
+
+		/**
+		 * Extracts the year from a date expression.
+		 * 
+		 * @return
+		 */
+		public ProjectionOperationBuilder extractYear() {
+			return project("year");
+		}
+
+		/**
+		 * Extracts the month from a date expression.
+		 * 
+		 * @return
+		 */
+		public ProjectionOperationBuilder extractMonth() {
+			return project("month");
+		}
+
+		/**
+		 * Extracts the week from a date expression.
+		 * 
+		 * @return
+		 */
+		public ProjectionOperationBuilder extractWeek() {
+			return project("week");
+		}
+
+		/**
+		 * Extracts the dayOfYear from a date expression.
+		 * 
+		 * @return
+		 */
+		public ProjectionOperationBuilder extractDayOfYear() {
+			return project("dayOfYear");
+		}
+
+		/**
+		 * Extracts the dayOfMonth from a date expression.
+		 * 
+		 * @return
+		 */
+		public ProjectionOperationBuilder extractDayOfMonth() {
+			return project("dayOfMonth");
+		}
+
+		/**
+		 * Extracts the dayOfWeek from a date expression.
+		 * 
+		 * @return
+		 */
+		public ProjectionOperationBuilder extractDayOfWeek() {
+			return project("dayOfWeek");
+		}
+	}
+
+	/**
+	 * Base class for {@link Projection} implementations.
+	 * 
+	 * @author Oliver Gierke
+	 */
+	private static abstract class Projection {
+
+		private final ExposedField field;
+
+		/**
+		 * Creates new {@link Projection} for the given {@link Field}.
+		 * 
+		 * @param field must not be {@literal null}.
+		 */
+		public Projection(Field field) {
+
+			Assert.notNull(field, "Field must not be null!");
+			this.field = new ExposedField(field, true);
+		}
+
+		/**
+		 * Returns the field exposed by the {@link Projection}.
+		 * 
+		 * @return will never be {@literal null}.
+		 */
+		public ExposedField getExposedField() {
+			return field;
+		}
+
+		/**
+		 * Renders the current {@link Projection} into a {@link DBObject} based on the given
+		 * {@link AggregationOperationContext}.
+		 * 
+		 * @param context will never be {@literal null}.
+		 * @return
+		 */
+		public abstract DBObject toDBObject(AggregationOperationContext context);
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/SkipOperation.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import org.springframework.util.Assert;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+
+/**
+ * Encapsulates the aggregation framework {@code $skip}-operation.
+ * 
+ * @see http://docs.mongodb.org/manual/reference/aggregation/skip/
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ * @since 1.3
+ */
+public class SkipOperation implements AggregationOperation {
+
+	private final long skipCount;
+
+	/**
+	 * Creates a new {@link SkipOperation} skipping the given number of elements.
+	 * 
+	 * @param skipCount number of documents to skip.
+	 */
+	public SkipOperation(long skipCount) {
+
+		Assert.isTrue(skipCount >= 0, "Skip count must not be negative!");
+		this.skipCount = skipCount;
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperation#toDBObject(org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+	 */
+	@Override
+	public DBObject toDBObject(AggregationOperationContext context) {
+		return new BasicDBObject("$skip", skipCount);
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/SortOperation.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import org.springframework.data.domain.Sort;
+import org.springframework.data.domain.Sort.Direction;
+import org.springframework.data.domain.Sort.Order;
+import org.springframework.data.mongodb.core.aggregation.ExposedFields.FieldReference;
+import org.springframework.util.Assert;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+
+/**
+ * Encapsulates the aggregation framework {@code $sort}-operation.
+ * 
+ * @see http://docs.mongodb.org/manual/reference/aggregation/sort/#pipe._S_sort
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ * @since 1.3
+ */
+public class SortOperation implements AggregationOperation {
+
+	private final Sort sort;
+
+	/**
+	 * Creates a new {@link SortOperation} for the given {@link Sort} instance.
+	 * 
+	 * @param sort must not be {@literal null}.
+	 */
+	public SortOperation(Sort sort) {
+
+		Assert.notNull(sort, "Sort must not be null!");
+		this.sort = sort;
+	}
+
+	public SortOperation and(Direction direction, String... fields) {
+		return and(new Sort(direction, fields));
+	}
+
+	public SortOperation and(Sort sort) {
+		return new SortOperation(this.sort.and(sort));
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperation#toDBObject(org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+	 */
+	@Override
+	public DBObject toDBObject(AggregationOperationContext context) {
+
+		BasicDBObject object = new BasicDBObject();
+
+		for (Order order : sort) {
+
+			// Check reference
+			FieldReference reference = context.getReference(order.getProperty());
+			object.put(reference.getRaw(), order.isAscending() ? 1 : -1);
+		}
+
+		return new BasicDBObject("$sort", object);
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/SpelExpressionTransformer.java

@@ -0,0 +1,513 @@
+/*
+ * Copyright 2013-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import static org.springframework.data.mongodb.util.DBObjectUtils.*;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import org.springframework.core.GenericTypeResolver;
+import org.springframework.data.mongodb.core.spel.ExpressionNode;
+import org.springframework.data.mongodb.core.spel.ExpressionTransformationContextSupport;
+import org.springframework.data.mongodb.core.spel.LiteralNode;
+import org.springframework.data.mongodb.core.spel.MethodReferenceNode;
+import org.springframework.data.mongodb.core.spel.OperatorNode;
+import org.springframework.expression.spel.ExpressionState;
+import org.springframework.expression.spel.SpelNode;
+import org.springframework.expression.spel.SpelParserConfiguration;
+import org.springframework.expression.spel.ast.CompoundExpression;
+import org.springframework.expression.spel.ast.Indexer;
+import org.springframework.expression.spel.ast.InlineList;
+import org.springframework.expression.spel.ast.PropertyOrFieldReference;
+import org.springframework.expression.spel.standard.SpelExpression;
+import org.springframework.expression.spel.standard.SpelExpressionParser;
+import org.springframework.expression.spel.support.StandardEvaluationContext;
+import org.springframework.util.Assert;
+import org.springframework.util.NumberUtils;
+
+import com.mongodb.BasicDBList;
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+
+/**
+ * Renders the AST of a SpEL expression as a MongoDB Aggregation Framework projection expression.
+ * 
+ * @author Thomas Darimont
+ */
+class SpelExpressionTransformer implements AggregationExpressionTransformer {
+
+	// TODO: remove explicit usage of a configuration once SPR-11031 gets fixed
+	private static final SpelParserConfiguration CONFIG = new SpelParserConfiguration(false, false);
+	private static final SpelExpressionParser PARSER = new SpelExpressionParser(CONFIG);
+	private final List<ExpressionNodeConversion<? extends ExpressionNode>> conversions;
+
+	/**
+	 * Creates a new {@link SpelExpressionTransformer}.
+	 */
+	public SpelExpressionTransformer() {
+
+		List<ExpressionNodeConversion<? extends ExpressionNode>> conversions = new ArrayList<ExpressionNodeConversion<? extends ExpressionNode>>();
+		conversions.add(new OperatorNodeConversion(this));
+		conversions.add(new LiteralNodeConversion(this));
+		conversions.add(new IndexerNodeConversion(this));
+		conversions.add(new InlineListNodeConversion(this));
+		conversions.add(new PropertyOrFieldReferenceNodeConversion(this));
+		conversions.add(new CompoundExpressionNodeConversion(this));
+		conversions.add(new MethodReferenceNodeConversion(this));
+
+		this.conversions = Collections.unmodifiableList(conversions);
+	}
+
+	/**
+	 * Transforms the given SpEL expression to a corresponding MongoDB expression against the given
+	 * {@link AggregationOperationContext} {@code context}.
+	 * <p>
+	 * Exposes the given @{code params} as <code>[0] ... [n]</code>.
+	 * 
+	 * @param expression must not be {@literal null}
+	 * @param context must not be {@literal null}
+	 * @param params must not be {@literal null}
+	 * @return
+	 */
+	public Object transform(String expression, AggregationOperationContext context, Object... params) {
+
+		Assert.notNull(expression, "Expression must not be null!");
+		Assert.notNull(context, "AggregationOperationContext must not be null!");
+		Assert.notNull(params, "Parameters must not be null!");
+
+		SpelExpression spelExpression = (SpelExpression) PARSER.parseExpression(expression);
+		ExpressionState state = new ExpressionState(new StandardEvaluationContext(params), CONFIG);
+		ExpressionNode node = ExpressionNode.from(spelExpression.getAST(), state);
+
+		return transform(new AggregationExpressionTransformationContext<ExpressionNode>(node, null, null, context));
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.spel.ExpressionTransformer#transform(org.springframework.data.mongodb.core.spel.ExpressionTransformationContextSupport)
+	 */
+	public Object transform(AggregationExpressionTransformationContext<ExpressionNode> context) {
+		return lookupConversionFor(context.getCurrentNode()).convert(context);
+	}
+
+	/**
+	 * Returns an appropriate {@link ExpressionNodeConversion} for the given {@code node}. Throws an
+	 * {@link IllegalArgumentException} if no conversion could be found.
+	 * 
+	 * @param node
+	 * @return the appropriate {@link ExpressionNodeConversion} for the given {@link ExpressionNode}.
+	 */
+	@SuppressWarnings("unchecked")
+	private ExpressionNodeConversion<ExpressionNode> lookupConversionFor(ExpressionNode node) {
+
+		for (ExpressionNodeConversion<? extends ExpressionNode> candidate : conversions) {
+			if (candidate.supports(node)) {
+				return (ExpressionNodeConversion<ExpressionNode>) candidate;
+			}
+		}
+
+		throw new IllegalArgumentException("Unsupported Element: " + node + " Type: " + node.getClass()
+				+ " You probably have a syntax error in your SpEL expression!");
+	}
+
+	/**
+	 * Abstract base class for {@link SpelNode} to (Db)-object conversions.
+	 * 
+	 * @author Thomas Darimont
+	 * @author Oliver Gierke
+	 */
+	private static abstract class ExpressionNodeConversion<T extends ExpressionNode> implements
+			AggregationExpressionTransformer {
+
+		private final AggregationExpressionTransformer transformer;
+		private final Class<? extends ExpressionNode> nodeType;
+
+		/**
+		 * Creates a new {@link ExpressionNodeConversion}.
+		 * 
+		 * @param transformer must not be {@literal null}.
+		 */
+		@SuppressWarnings("unchecked")
+		public ExpressionNodeConversion(AggregationExpressionTransformer transformer) {
+
+			Assert.notNull(transformer, "Transformer must not be null!");
+
+			this.nodeType = (Class<? extends ExpressionNode>) GenericTypeResolver.resolveTypeArgument(this.getClass(),
+					ExpressionNodeConversion.class);
+			this.transformer = transformer;
+		}
+
+		/**
+		 * Returns whether the current conversion supports the given {@link ExpressionNode}. By default we will match the
+		 * node type against the genric type the subclass types the type parameter to.
+		 * 
+		 * @param node will never be {@literal null}.
+		 * @return true if {@literal this} conversion can be applied to the given {@code node}.
+		 */
+		protected boolean supports(ExpressionNode node) {
+			return nodeType.equals(node.getClass());
+		}
+
+		/**
+		 * Triggers the transformation for the given {@link ExpressionNode} and the given current context.
+		 * 
+		 * @param node must not be {@literal null}.
+		 * @param context must not be {@literal null}.
+		 * @return
+		 */
+		protected Object transform(ExpressionNode node, AggregationExpressionTransformationContext<?> context) {
+
+			Assert.notNull(node, "ExpressionNode must not be null!");
+			Assert.notNull(context, "AggregationExpressionTransformationContext must not be null!");
+
+			return transform(node, context.getParentNode(), null, context);
+		}
+
+		/**
+		 * Triggers the transformation with the given new {@link ExpressionNode}, new parent node, the current operation and
+		 * the previous context.
+		 * 
+		 * @param node must not be {@literal null}.
+		 * @param parent
+		 * @param operation
+		 * @param context must not be {@literal null}.
+		 * @return
+		 */
+		protected Object transform(ExpressionNode node, ExpressionNode parent, DBObject operation,
+				AggregationExpressionTransformationContext<?> context) {
+
+			Assert.notNull(node, "ExpressionNode must not be null!");
+			Assert.notNull(context, "AggregationExpressionTransformationContext must not be null!");
+
+			return transform(new AggregationExpressionTransformationContext<ExpressionNode>(node, parent, operation,
+					context.getAggregationContext()));
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.NodeConversion#transform(org.springframework.data.mongodb.core.aggregation.AggregationExpressionTransformer.AggregationExpressionTransformationContext)
+		 */
+		@Override
+		public Object transform(AggregationExpressionTransformationContext<ExpressionNode> context) {
+			return transformer.transform(context);
+		}
+
+		/**
+		 * Performs the actual conversion from {@link SpelNode} to the corresponding representation for MongoDB.
+		 * 
+		 * @param context
+		 * @return
+		 */
+		protected abstract Object convert(AggregationExpressionTransformationContext<T> context);
+	}
+
+	/**
+	 * A {@link ExpressionNodeConversion} that converts arithmetic operations.
+	 * 
+	 * @author Thomas Darimont
+	 */
+	private static class OperatorNodeConversion extends ExpressionNodeConversion<OperatorNode> {
+
+		public OperatorNodeConversion(AggregationExpressionTransformer transformer) {
+			super(transformer);
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.SpelNodeWrapper#convertSpelNodeToMongoObjectExpression(org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.ExpressionConversionContext)
+		 */
+		@Override
+		protected Object convert(AggregationExpressionTransformationContext<OperatorNode> context) {
+
+			OperatorNode currentNode = context.getCurrentNode();
+
+			DBObject operationObject = createOperationObjectAndAddToPreviousArgumentsIfNecessary(context, currentNode);
+			Object leftResult = transform(currentNode.getLeft(), currentNode, operationObject, context);
+
+			if (currentNode.isUnaryMinus()) {
+				return convertUnaryMinusOp(context, leftResult);
+			}
+
+			// we deliberately ignore the RHS result
+			transform(currentNode.getRight(), currentNode, operationObject, context);
+
+			return operationObject;
+		}
+
+		private DBObject createOperationObjectAndAddToPreviousArgumentsIfNecessary(
+				AggregationExpressionTransformationContext<OperatorNode> context, OperatorNode currentNode) {
+
+			DBObject nextDbObject = new BasicDBObject(currentNode.getMongoOperator(), new BasicDBList());
+
+			if (!context.hasPreviousOperation()) {
+				return nextDbObject;
+			}
+
+			if (context.parentIsSameOperation()) {
+
+				// same operator applied in a row e.g. 1 + 2 + 3 carry on with the operation and render as $add: [1, 2 ,3]
+				nextDbObject = context.getPreviousOperationObject();
+			} else if (!currentNode.isUnaryOperator()) {
+
+				// different operator -> add context object for next level to list if arguments of previous expression
+				context.addToPreviousOperation(nextDbObject);
+			}
+
+			return nextDbObject;
+		}
+
+		private Object convertUnaryMinusOp(ExpressionTransformationContextSupport<OperatorNode> context, Object leftResult) {
+
+			Object result = leftResult instanceof Number ? leftResult
+					: new BasicDBObject("$multiply", dbList(-1, leftResult));
+
+			if (leftResult != null && context.hasPreviousOperation()) {
+				context.addToPreviousOperation(result);
+			}
+
+			return result;
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.SpelNodeWrapper#supports(java.lang.Class)
+		 */
+		@Override
+		protected boolean supports(ExpressionNode node) {
+			return node.isMathematicalOperation();
+		}
+	}
+
+	/**
+	 * A {@link ExpressionNodeConversion} that converts indexed expressions.
+	 * 
+	 * @author Thomas Darimont
+	 * @author Oliver Gierke
+	 */
+	private static class IndexerNodeConversion extends ExpressionNodeConversion<ExpressionNode> {
+
+		public IndexerNodeConversion(AggregationExpressionTransformer transformer) {
+			super(transformer);
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.SpelNodeWrapper#convertSpelNodeToMongoObjectExpression(org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.ExpressionConversionContext)
+		 */
+		@Override
+		protected Object convert(AggregationExpressionTransformationContext<ExpressionNode> context) {
+			return context.addToPreviousOrReturn(context.getCurrentNode().getValue());
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.NodeConversion#supports(org.springframework.data.mongodb.core.spel.ExpressionNode)
+		 */
+		@Override
+		protected boolean supports(ExpressionNode node) {
+			return node.isOfType(Indexer.class);
+		}
+	}
+
+	/**
+	 * A {@link ExpressionNodeConversion} that converts in-line list expressions.
+	 * 
+	 * @author Thomas Darimont
+	 */
+	private static class InlineListNodeConversion extends ExpressionNodeConversion<ExpressionNode> {
+
+		public InlineListNodeConversion(AggregationExpressionTransformer transformer) {
+			super(transformer);
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.SpelNodeWrapper#convertSpelNodeToMongoObjectExpression(org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.ExpressionConversionContext)
+		 */
+		@Override
+		protected Object convert(AggregationExpressionTransformationContext<ExpressionNode> context) {
+
+			ExpressionNode currentNode = context.getCurrentNode();
+
+			if (!currentNode.hasChildren()) {
+				return null;
+			}
+
+			// just take the first item
+			return transform(currentNode.getChild(0), currentNode, null, context);
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.NodeConversion#supports(org.springframework.data.mongodb.core.spel.ExpressionNode)
+		 */
+		@Override
+		protected boolean supports(ExpressionNode node) {
+			return node.isOfType(InlineList.class);
+		}
+	}
+
+	/**
+	 * A {@link ExpressionNodeConversion} that converts property or field reference expressions.
+	 * 
+	 * @author Thomas Darimont
+	 * @author Oliver Gierke
+	 */
+	private static class PropertyOrFieldReferenceNodeConversion extends ExpressionNodeConversion<ExpressionNode> {
+
+		public PropertyOrFieldReferenceNodeConversion(AggregationExpressionTransformer transformer) {
+			super(transformer);
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.NodeConversion#convert(org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.ExpressionTransformationContext)
+		 */
+		@Override
+		protected Object convert(AggregationExpressionTransformationContext<ExpressionNode> context) {
+
+			String fieldReference = context.getFieldReference().toString();
+			return context.addToPreviousOrReturn(fieldReference);
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.NodeConversion#supports(org.springframework.data.mongodb.core.spel.ExpressionNode)
+		 */
+		@Override
+		protected boolean supports(ExpressionNode node) {
+			return node.isOfType(PropertyOrFieldReference.class);
+		}
+	}
+
+	/**
+	 * A {@link ExpressionNodeConversion} that converts literal expressions.
+	 * 
+	 * @author Thomas Darimont
+	 * @author Oliver Gierke
+	 */
+	private static class LiteralNodeConversion extends ExpressionNodeConversion<LiteralNode> {
+
+		public LiteralNodeConversion(AggregationExpressionTransformer transformer) {
+			super(transformer);
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.SpelNodeWrapper#convertSpelNodeToMongoObjectExpression(org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.ExpressionConversionContext)
+		 */
+		@Override
+		@SuppressWarnings("unchecked")
+		protected Object convert(AggregationExpressionTransformationContext<LiteralNode> context) {
+
+			LiteralNode node = context.getCurrentNode();
+			Object value = node.getValue();
+
+			if (context.hasPreviousOperation()) {
+
+				if (node.isUnaryMinus(context.getParentNode())) {
+					// unary minus operator
+					return NumberUtils.convertNumberToTargetClass(((Number) value).doubleValue() * -1,
+							(Class<Number>) value.getClass()); // retain type, e.g. int to -int
+				}
+
+				return context.addToPreviousOperation(value);
+			}
+
+			return value;
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.SpelNodeWrapper#supports(org.springframework.expression.spel.SpelNode)
+		 */
+		@Override
+		protected boolean supports(ExpressionNode node) {
+			return node.isLiteral();
+		}
+	}
+
+	/**
+	 * A {@link ExpressionNodeConversion} that converts method reference expressions.
+	 * 
+	 * @author Thomas Darimont
+	 * @author Oliver Gierke
+	 */
+	private static class MethodReferenceNodeConversion extends ExpressionNodeConversion<MethodReferenceNode> {
+
+		public MethodReferenceNodeConversion(AggregationExpressionTransformer transformer) {
+			super(transformer);
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.SpelNodeWrapper#convertSpelNodeToMongoObjectExpression(org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.ExpressionConversionContext)
+		 */
+		@Override
+		protected Object convert(AggregationExpressionTransformationContext<MethodReferenceNode> context) {
+
+			MethodReferenceNode node = context.getCurrentNode();
+			List<Object> args = new ArrayList<Object>();
+
+			for (ExpressionNode childNode : node) {
+				args.add(transform(childNode, context));
+			}
+
+			return context.addToPreviousOrReturn(new BasicDBObject(node.getMethodName(), dbList(args.toArray())));
+		}
+	}
+
+	/**
+	 * A {@link ExpressionNodeConversion} that converts method compound expressions.
+	 * 
+	 * @author Thomas Darimont
+	 * @author Oliver Gierke
+	 */
+	private static class CompoundExpressionNodeConversion extends ExpressionNodeConversion<ExpressionNode> {
+
+		public CompoundExpressionNodeConversion(AggregationExpressionTransformer transformer) {
+			super(transformer);
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.SpelNodeWrapper#convertSpelNodeToMongoObjectExpression(org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.ExpressionConversionContext)
+		 */
+		@Override
+		protected Object convert(AggregationExpressionTransformationContext<ExpressionNode> context) {
+
+			ExpressionNode currentNode = context.getCurrentNode();
+
+			if (currentNode.hasfirstChildNotOfType(Indexer.class)) {
+				// we have a property path expression like: foo.bar -> render as reference
+				return context.addToPreviousOrReturn(context.getFieldReference().toString());
+			}
+
+			return context.addToPreviousOrReturn(currentNode.getValue());
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.data.mongodb.core.aggregation.SpelExpressionTransformer.NodeConversion#supports(org.springframework.data.mongodb.core.spel.ExpressionNode)
+		 */
+		@Override
+		protected boolean supports(ExpressionNode node) {
+			return node.isOfType(CompoundExpression.class);
+		}
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/TypeBasedAggregationOperationContext.java

@@ -0,0 +1,103 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import static org.springframework.data.mongodb.core.aggregation.Fields.*;
+
+import org.springframework.data.mapping.PropertyPath;
+import org.springframework.data.mapping.context.MappingContext;
+import org.springframework.data.mapping.context.PersistentPropertyPath;
+import org.springframework.data.mongodb.core.aggregation.ExposedFields.ExposedField;
+import org.springframework.data.mongodb.core.aggregation.ExposedFields.FieldReference;
+import org.springframework.data.mongodb.core.convert.QueryMapper;
+import org.springframework.data.mongodb.core.mapping.MongoPersistentEntity;
+import org.springframework.data.mongodb.core.mapping.MongoPersistentProperty;
+import org.springframework.util.Assert;
+
+import com.mongodb.DBObject;
+
+/**
+ * {@link AggregationOperationContext} aware of a particular type and a {@link MappingContext} to potentially translate
+ * property references into document field names.
+ * 
+ * @author Oliver Gierke
+ * @since 1.3
+ */
+public class TypeBasedAggregationOperationContext implements AggregationOperationContext {
+
+	private final Class<?> type;
+	private final MappingContext<? extends MongoPersistentEntity<?>, MongoPersistentProperty> mappingContext;
+	private final QueryMapper mapper;
+
+	/**
+	 * Creates a new {@link TypeBasedAggregationOperationContext} for the given type, {@link MappingContext} and
+	 * {@link QueryMapper}.
+	 * 
+	 * @param type must not be {@literal null}.
+	 * @param mappingContext must not be {@literal null}.
+	 * @param mapper must not be {@literal null}.
+	 */
+	public TypeBasedAggregationOperationContext(Class<?> type,
+			MappingContext<? extends MongoPersistentEntity<?>, MongoPersistentProperty> mappingContext, QueryMapper mapper) {
+
+		Assert.notNull(type, "Type must not be null!");
+		Assert.notNull(mappingContext, "MappingContext must not be null!");
+		Assert.notNull(mapper, "QueryMapper must not be null!");
+
+		this.type = type;
+		this.mappingContext = mappingContext;
+		this.mapper = mapper;
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperationContext#getMappedObject(com.mongodb.DBObject)
+	 */
+	@Override
+	public DBObject getMappedObject(DBObject dbObject) {
+		return mapper.getMappedObject(dbObject, mappingContext.getPersistentEntity(type));
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperationContext#getReference(org.springframework.data.mongodb.core.aggregation.Field)
+	 */
+	@Override
+	public FieldReference getReference(Field field) {
+
+		PropertyPath.from(field.getTarget(), type);
+		return getReferenceFor(field);
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperationContext#getReference(java.lang.String)
+	 */
+	@Override
+	public FieldReference getReference(String name) {
+		return getReferenceFor(field(name));
+	}
+
+	private FieldReference getReferenceFor(Field field) {
+
+		PersistentPropertyPath<MongoPersistentProperty> propertyPath = mappingContext.getPersistentPropertyPath(
+				field.getTarget(), type);
+		Field mappedField = field(propertyPath.getLeafProperty().getName(),
+				propertyPath.toDotPath(MongoPersistentProperty.PropertyToFieldNameConverter.INSTANCE));
+
+		return new FieldReference(new ExposedField(mappedField, true));
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/TypedAggregation.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright 2013-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import java.util.List;
+
+import org.springframework.util.Assert;
+
+/**
+ * A {@code TypedAggregation} is a special {@link Aggregation} that holds information of the input aggregation type.
+ * 
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ */
+public class TypedAggregation<I> extends Aggregation {
+
+	private final Class<I> inputType;
+
+	/**
+	 * Creates a new {@link TypedAggregation} from the given {@link AggregationOperation}s.
+	 * 
+	 * @param inputType must not be {@literal null}.
+	 * @param operations must not be {@literal null} or empty.
+	 */
+	public TypedAggregation(Class<I> inputType, AggregationOperation... operations) {
+		this(inputType, asAggregationList(operations));
+	}
+
+	/**
+	 * Creates a new {@link TypedAggregation} from the given {@link AggregationOperation}s.
+	 * 
+	 * @param inputType must not be {@literal null}.
+	 * @param operations must not be {@literal null} or empty.
+	 */
+	public TypedAggregation(Class<I> inputType, List<AggregationOperation> operations) {
+		this(inputType, operations, DEFAULT_OPTIONS);
+	}
+
+	/**
+	 * Creates a new {@link TypedAggregation} from the given {@link AggregationOperation}s and the given
+	 * {@link AggregationOptions}.
+	 * 
+	 * @param inputType must not be {@literal null}.
+	 * @param operations must not be {@literal null} or empty.
+	 * @param options must not be {@literal null}.
+	 */
+	public TypedAggregation(Class<I> inputType, List<AggregationOperation> operations, AggregationOptions options) {
+
+		super(operations, options);
+
+		Assert.notNull(inputType, "Input type must not be null!");
+		this.inputType = inputType;
+	}
+
+	/**
+	 * Returns the input type for the {@link Aggregation}.
+	 * 
+	 * @return the inputType will never be {@literal null}.
+	 */
+	public Class<I> getInputType() {
+		return inputType;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.Aggregation#withOptions(org.springframework.data.mongodb.core.aggregation.AggregationOptions)
+	 */
+	public TypedAggregation<I> withOptions(AggregationOptions options) {
+
+		Assert.notNull(options, "AggregationOptions must not be null.");
+		return new TypedAggregation<I>(inputType, operations, options);
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/UnwindOperation.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.aggregation;
+
+import org.springframework.data.mongodb.core.aggregation.ExposedFields.ExposedField;
+import org.springframework.util.Assert;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+
+/**
+ * Encapsulates the aggregation framework {@code $unwind}-operation.
+ * 
+ * @see http://docs.mongodb.org/manual/reference/aggregation/unwind/#pipe._S_unwind
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ * @since 1.3
+ */
+public class UnwindOperation implements AggregationOperation {
+
+	private final ExposedField field;
+
+	/**
+	 * Creates a new {@link UnwindOperation} for the given {@link Field}.
+	 * 
+	 * @param field must not be {@literal null}.
+	 */
+	public UnwindOperation(Field field) {
+
+		Assert.notNull(field);
+		this.field = new ExposedField(field, true);
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.aggregation.AggregationOperation#toDBObject(org.springframework.data.mongodb.core.aggregation.AggregationOperationContext)
+	 */
+	@Override
+	public DBObject toDBObject(AggregationOperationContext context) {
+		return new BasicDBObject("$unwind", context.getReference(field).toString());
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/aggregation/package-info.java

@@ -0,0 +1,5 @@
+/**
+ * Support for the MongoDB aggregation framework.
+ * @since 1.3
+ */
+package org.springframework.data.mongodb.core.aggregation;

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/AbstractMongoConverter.java

@@ -1,11 +1,11 @@
 /*
- * Copyright (c) 2011 by the original author(s).
+ * Copyright 2011-2013 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
@@ -13,43 +13,43 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package org.springframework.data.mongodb.core.convert;
 
 import java.math.BigInteger;
+
 import org.bson.types.ObjectId;
 import org.springframework.beans.factory.InitializingBean;
 import org.springframework.core.convert.ConversionService;
 import org.springframework.core.convert.support.ConversionServiceFactory;
 import org.springframework.core.convert.support.GenericConversionService;
+import org.springframework.data.convert.EntityInstantiators;
 import org.springframework.data.mongodb.core.convert.MongoConverters.BigIntegerToObjectIdConverter;
-import org.springframework.data.mongodb.core.convert.MongoConverters.BigIntegerToStringConverter;
 import org.springframework.data.mongodb.core.convert.MongoConverters.ObjectIdToBigIntegerConverter;
 import org.springframework.data.mongodb.core.convert.MongoConverters.ObjectIdToStringConverter;
-import org.springframework.data.mongodb.core.convert.MongoConverters.StringToBigIntegerConverter;
 import org.springframework.data.mongodb.core.convert.MongoConverters.StringToObjectIdConverter;
 
 /**
  * Base class for {@link MongoConverter} implementations. Sets up a {@link GenericConversionService} and populates basic
  * converters. Allows registering {@link CustomConversions}.
  * 
- * @author Jon Brisbin <jbrisbin@vmware.com>
- * @author Oliver Gierke ogierke@vmware.com
+ * @author Jon Brisbin
+ * @author Oliver Gierke
  */
 public abstract class AbstractMongoConverter implements MongoConverter, InitializingBean {
 
 	protected final GenericConversionService conversionService;
 	protected CustomConversions conversions = new CustomConversions();
+	protected EntityInstantiators instantiators = new EntityInstantiators();
 
 	/**
 	 * Creates a new {@link AbstractMongoConverter} using the given {@link GenericConversionService}.
 	 * 
 	 * @param conversionService
 	 */
+	@SuppressWarnings("deprecation")
 	public AbstractMongoConverter(GenericConversionService conversionService) {
 		this.conversionService = conversionService == null ? ConversionServiceFactory.createDefaultConversionService()
 				: conversionService;
-		this.conversionService.removeConvertible(Object.class, String.class);
 	}
 
 	/**
@@ -61,6 +61,15 @@ public abstract class AbstractMongoConverter implements MongoConverter, Initiali
 		this.conversions = conversions;
 	}
 
+	/**
+	 * Registers {@link EntityInstantiators} to customize entity instantiation.
+	 * 
+	 * @param instantiators
+	 */
+	public void setInstantiators(EntityInstantiators instantiators) {
+		this.instantiators = instantiators == null ? new EntityInstantiators() : instantiators;
+	}
+
 	/**
 	 * Registers additional converters that will be available when using the {@link ConversionService} directly (e.g. for
 	 * id conversion). These converters are not custom conversions as they'd introduce unwanted conversions (e.g.
@@ -80,16 +89,18 @@ public abstract class AbstractMongoConverter implements MongoConverter, Initiali
 		if (!conversionService.canConvert(BigInteger.class, ObjectId.class)) {
 			conversionService.addConverter(BigIntegerToObjectIdConverter.INSTANCE);
 		}
-		if (!conversionService.canConvert(BigInteger.class, String.class)) {
-			conversionService.addConverter(BigIntegerToStringConverter.INSTANCE);
-		}
-		if (!conversionService.canConvert(String.class, BigInteger.class)) {
-			conversionService.addConverter(StringToBigIntegerConverter.INSTANCE);
-		}
 
 		conversions.registerConvertersIn(conversionService);
 	}
 
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.convert.MongoWriter#convertToMongoType(java.lang.Object)
+	 */
+	public Object convertToMongoType(Object obj) {
+		return convertToMongoType(obj, null);
+	}
+
 	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.mongodb.core.core.convert.MongoConverter#getConversionService()

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/ConverterRegistration.java

@@ -0,0 +1,115 @@
+/*
+ * Copyright 2011 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.convert;
+
+import org.springframework.core.convert.converter.GenericConverter.ConvertiblePair;
+import org.springframework.data.mongodb.core.mapping.MongoSimpleTypes;
+import org.springframework.util.Assert;
+
+/**
+ * Conversion registration information.
+ * 
+ * @author Oliver Gierke
+ */
+class ConverterRegistration {
+
+	private final ConvertiblePair convertiblePair;
+	private final boolean reading;
+	private final boolean writing;
+
+	/**
+	 * Creates a new {@link ConverterRegistration}.
+	 * 
+	 * @param convertiblePair must not be {@literal null}.
+	 * @param isReading whether to force to consider the converter for reading.
+	 * @param isWritingwhether to force to consider the converter for reading.
+	 */
+	public ConverterRegistration(ConvertiblePair convertiblePair, boolean isReading, boolean isWriting) {
+
+		Assert.notNull(convertiblePair);
+
+		this.convertiblePair = convertiblePair;
+		this.reading = isReading;
+		this.writing = isWriting;
+	}
+
+	/**
+	 * Creates a new {@link ConverterRegistration} from the given source and target type and read/write flags.
+	 * 
+	 * @param source the source type to be converted from, must not be {@literal null}.
+	 * @param target the target type to be converted to, must not be {@literal null}.
+	 * @param isReading whether to force to consider the converter for reading.
+	 * @param isWriting whether to force to consider the converter for writing.
+	 */
+	public ConverterRegistration(Class<?> source, Class<?> target, boolean isReading, boolean isWriting) {
+		this(new ConvertiblePair(source, target), isReading, isWriting);
+	}
+
+	/**
+	 * Returns whether the converter shall be used for writing.
+	 * 
+	 * @return
+	 */
+	public boolean isWriting() {
+		return writing == true || (!reading && isSimpleTargetType());
+	}
+
+	/**
+	 * Returns whether the converter shall be used for reading.
+	 * 
+	 * @return
+	 */
+	public boolean isReading() {
+		return reading == true || (!writing && isSimpleSourceType());
+	}
+
+	/**
+	 * Returns the actual conversion pair.
+	 * 
+	 * @return
+	 */
+	public ConvertiblePair getConvertiblePair() {
+		return convertiblePair;
+	}
+
+	/**
+	 * Returns whether the source type is a Mongo simple one.
+	 * 
+	 * @return
+	 */
+	public boolean isSimpleSourceType() {
+		return isMongoBasicType(convertiblePair.getSourceType());
+	}
+
+	/**
+	 * Returns whether the target type is a Mongo simple one.
+	 * 
+	 * @return
+	 */
+	public boolean isSimpleTargetType() {
+		return isMongoBasicType(convertiblePair.getTargetType());
+	}
+
+	/**
+	 * Returns whether the given type is a type that Mongo can handle basically.
+	 * 
+	 * @param type
+	 * @return
+	 */
+	private static boolean isMongoBasicType(Class<?> type) {
+		return MongoSimpleTypes.HOLDER.isSimpleType(type);
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/CustomConversions.java

@@ -1,11 +1,11 @@
 /*
- * Copyright (c) 2011 by the original author(s).
+ * Copyright 2011-2014 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *     http://www.apache.org/licenses/LICENSE-2.0
+ *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
@@ -17,13 +17,17 @@ package org.springframework.data.mongodb.core.convert;
 
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Date;
+import java.util.Collections;
 import java.util.HashSet;
+import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Locale;
 import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
 
-import org.bson.types.ObjectId;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.core.GenericTypeResolver;
 import org.springframework.core.convert.TypeDescriptor;
 import org.springframework.core.convert.converter.Converter;
@@ -31,14 +35,20 @@ import org.springframework.core.convert.converter.ConverterFactory;
 import org.springframework.core.convert.converter.GenericConverter;
 import org.springframework.core.convert.converter.GenericConverter.ConvertiblePair;
 import org.springframework.core.convert.support.GenericConversionService;
+import org.springframework.data.convert.JodaTimeConverters;
+import org.springframework.data.convert.ReadingConverter;
+import org.springframework.data.convert.WritingConverter;
 import org.springframework.data.mapping.model.SimpleTypeHolder;
 import org.springframework.data.mongodb.core.convert.MongoConverters.BigDecimalToStringConverter;
+import org.springframework.data.mongodb.core.convert.MongoConverters.BigIntegerToStringConverter;
+import org.springframework.data.mongodb.core.convert.MongoConverters.DBObjectToStringConverter;
 import org.springframework.data.mongodb.core.convert.MongoConverters.StringToBigDecimalConverter;
+import org.springframework.data.mongodb.core.convert.MongoConverters.StringToBigIntegerConverter;
+import org.springframework.data.mongodb.core.convert.MongoConverters.StringToURLConverter;
+import org.springframework.data.mongodb.core.convert.MongoConverters.URLToStringConverter;
 import org.springframework.data.mongodb.core.mapping.MongoSimpleTypes;
 import org.springframework.util.Assert;
 
-import com.mongodb.DBObject;
-
 /**
  * Value object to capture custom conversion. That is essentially a {@link List} of converters and some additional logic
  * around them. The converters are pretty much builds up two sets of types which Mongo basic types {@see #MONGO_TYPES}
@@ -47,17 +57,19 @@ import com.mongodb.DBObject;
  * .
  * 
  * @author Oliver Gierke
+ * @author Thomas Darimont
  */
 public class CustomConversions {
 
-	@SuppressWarnings({ "unchecked" })
-	private static final List<Class<?>> MONGO_TYPES = Arrays.asList(Number.class, Date.class, ObjectId.class,
-			String.class, DBObject.class);
+	private static final Logger LOG = LoggerFactory.getLogger(CustomConversions.class);
+	private static final String READ_CONVERTER_NOT_SIMPLE = "Registering converter from %s to %s as reading converter although it doesn't convert from a Mongo supported type! You might wanna check you annotation setup at the converter implementation.";
+	private static final String WRITE_CONVERTER_NOT_SIMPLE = "Registering converter from %s to %s as writing converter although it doesn't convert to a Mongo supported type! You might wanna check you annotation setup at the converter implementation.";
 
 	private final Set<ConvertiblePair> readingPairs;
 	private final Set<ConvertiblePair> writingPairs;
 	private final Set<Class<?>> customSimpleTypes;
 	private final SimpleTypeHolder simpleTypeHolder;
+	private final ConcurrentMap<ConvertiblePair, CacheValue> customReadTargetTypes;
 
 	private final List<Object> converters;
 
@@ -77,20 +89,34 @@ public class CustomConversions {
 
 		Assert.notNull(converters);
 
-		this.readingPairs = new HashSet<ConvertiblePair>();
-		this.writingPairs = new HashSet<ConvertiblePair>();
+		this.readingPairs = new LinkedHashSet<ConvertiblePair>();
+		this.writingPairs = new LinkedHashSet<ConvertiblePair>();
 		this.customSimpleTypes = new HashSet<Class<?>>();
+		this.customReadTargetTypes = new ConcurrentHashMap<GenericConverter.ConvertiblePair, CacheValue>();
 
-		this.converters = new ArrayList<Object>();
-		this.converters.add(CustomToStringConverter.INSTANCE);
-		this.converters.add(BigDecimalToStringConverter.INSTANCE);
-		this.converters.add(StringToBigDecimalConverter.INSTANCE);
-		this.converters.addAll(converters);
+		List<Object> toRegister = new ArrayList<Object>();
 
-		for (Object c : this.converters) {
+		// Add user provided converters to make sure they can override the defaults
+		toRegister.addAll(converters);
+		toRegister.add(CustomToStringConverter.INSTANCE);
+		toRegister.add(BigDecimalToStringConverter.INSTANCE);
+		toRegister.add(StringToBigDecimalConverter.INSTANCE);
+		toRegister.add(BigIntegerToStringConverter.INSTANCE);
+		toRegister.add(StringToBigIntegerConverter.INSTANCE);
+		toRegister.add(URLToStringConverter.INSTANCE);
+		toRegister.add(StringToURLConverter.INSTANCE);
+		toRegister.add(DBObjectToStringConverter.INSTANCE);
+		
+		toRegister.addAll(JodaTimeConverters.getConvertersToRegister());
+		toRegister.addAll(GeoConverters.getConvertersToRegister());
+
+		for (Object c : toRegister) {
 			registerConversion(c);
 		}
 
+		Collections.reverse(toRegister);
+
+		this.converters = Collections.unmodifiableList(toRegister);
 		this.simpleTypeHolder = new SimpleTypeHolder(customSimpleTypes, MongoSimpleTypes.HOLDER);
 	}
 
@@ -155,14 +181,18 @@ public class CustomConversions {
 	 */
 	private void registerConversion(Object converter) {
 
+		Class<?> type = converter.getClass();
+		boolean isWriting = type.isAnnotationPresent(WritingConverter.class);
+		boolean isReading = type.isAnnotationPresent(ReadingConverter.class);
+
 		if (converter instanceof GenericConverter) {
 			GenericConverter genericConverter = (GenericConverter) converter;
 			for (ConvertiblePair pair : genericConverter.getConvertibleTypes()) {
-				register(pair);
+				register(new ConverterRegistration(pair, isReading, isWriting));
 			}
 		} else if (converter instanceof Converter) {
 			Class<?>[] arguments = GenericTypeResolver.resolveTypeArguments(converter.getClass(), Converter.class);
-			register(new ConvertiblePair(arguments[0], arguments[1]));
+			register(new ConverterRegistration(arguments[0], arguments[1], isReading, isWriting));
 		} else {
 			throw new IllegalArgumentException("Unsupported Converter type!");
 		}
@@ -174,15 +204,27 @@ public class CustomConversions {
 	 * 
 	 * @param pair
 	 */
-	private void register(ConvertiblePair pair) {
+	private void register(ConverterRegistration converterRegistration) {
+
+		ConvertiblePair pair = converterRegistration.getConvertiblePair();
+
+		if (converterRegistration.isReading()) {
 
-		if (isMongoBasicType(pair.getSourceType())) {
 			readingPairs.add(pair);
+
+			if (LOG.isWarnEnabled() && !converterRegistration.isSimpleSourceType()) {
+				LOG.warn(String.format(READ_CONVERTER_NOT_SIMPLE, pair.getSourceType(), pair.getTargetType()));
+			}
 		}
 
-		if (isMongoBasicType(pair.getTargetType())) {
+		if (converterRegistration.isWriting()) {
+
 			writingPairs.add(pair);
 			customSimpleTypes.add(pair.getSourceType());
+
+			if (LOG.isWarnEnabled() && !converterRegistration.isSimpleTargetType()) {
+				LOG.warn(String.format(WRITE_CONVERTER_NOT_SIMPLE, pair.getSourceType(), pair.getTargetType()));
+			}
 		}
 	}
 
@@ -190,81 +232,90 @@ public class CustomConversions {
 	 * Returns the target type to convert to in case we have a custom conversion registered to convert the given source
 	 * type into a Mongo native one.
 	 * 
-	 * @param source must not be {@literal null}
+	 * @param sourceType must not be {@literal null}
 	 * @return
 	 */
-	public Class<?> getCustomWriteTarget(Class<?> source) {
-		return getCustomWriteTarget(source, null);
+	public Class<?> getCustomWriteTarget(Class<?> sourceType) {
+		return getCustomWriteTarget(sourceType, null);
 	}
 
 	/**
 	 * Returns the target type we can write an onject of the given source type to. The returned type might be a subclass
-	 * oth the given expected type though. If {@code expexctedTargetType} is {@literal null} we will simply return the
+	 * oth the given expected type though. If {@code expectedTargetType} is {@literal null} we will simply return the
 	 * first target type matching or {@literal null} if no conversion can be found.
 	 * 
-	 * @param source must not be {@literal null}
-	 * @param expectedTargetType
+	 * @param sourceType must not be {@literal null}
+	 * @param requestedTargetType
 	 * @return
 	 */
-	public Class<?> getCustomWriteTarget(Class<?> source, Class<?> expectedTargetType) {
-		Assert.notNull(source);
-		return getCustomTarget(source, expectedTargetType, writingPairs);
+	public Class<?> getCustomWriteTarget(Class<?> sourceType, Class<?> requestedTargetType) {
+
+		Assert.notNull(sourceType);
+
+		return getCustomTarget(sourceType, requestedTargetType, writingPairs);
 	}
 
 	/**
 	 * Returns whether we have a custom conversion registered to write into a Mongo native type. The returned type might
-	 * be a subclass oth the given expected type though.
+	 * be a subclass of the given expected type though.
 	 * 
-	 * @param source must not be {@literal null}
+	 * @param sourceType must not be {@literal null}
 	 * @return
 	 */
-	public boolean hasCustomWriteTarget(Class<?> source) {
-		return hasCustomWriteTarget(source, null);
+	public boolean hasCustomWriteTarget(Class<?> sourceType) {
+
+		Assert.notNull(sourceType);
+		return hasCustomWriteTarget(sourceType, null);
 	}
 
 	/**
 	 * Returns whether we have a custom conversion registered to write an object of the given source type into an object
 	 * of the given Mongo native target type.
 	 * 
-	 * @param source must not be {@literal null}.
-	 * @param expectedTargetType
+	 * @param sourceType must not be {@literal null}.
+	 * @param requestedTargetType
 	 * @return
 	 */
-	public boolean hasCustomWriteTarget(Class<?> source, Class<?> expectedTargetType) {
-		return getCustomWriteTarget(source, expectedTargetType) != null;
+	public boolean hasCustomWriteTarget(Class<?> sourceType, Class<?> requestedTargetType) {
+
+		Assert.notNull(sourceType);
+		return getCustomWriteTarget(sourceType, requestedTargetType) != null;
 	}
 
 	/**
 	 * Returns whether we have a custom conversion registered to read the given source into the given target type.
 	 * 
-	 * @param source must not be {@literal null}
-	 * @param expectedTargetType must not be {@literal null}
+	 * @param sourceType must not be {@literal null}
+	 * @param requestedTargetType must not be {@literal null}
 	 * @return
 	 */
-	public boolean hasCustomReadTarget(Class<?> source, Class<?> expectedTargetType) {
-		Assert.notNull(source);
-		Assert.notNull(expectedTargetType);
-		return getCustomTarget(source, expectedTargetType, readingPairs) != null;
+	public boolean hasCustomReadTarget(Class<?> sourceType, Class<?> requestedTargetType) {
+
+		Assert.notNull(sourceType);
+		Assert.notNull(requestedTargetType);
+
+		return getCustomReadTarget(sourceType, requestedTargetType) != null;
 	}
 
 	/**
 	 * Inspects the given {@link ConvertiblePair} for ones that have a source compatible type as source. Additionally
-	 * checks assignabilty of the target type if one is given.
+	 * checks assignability of the target type if one is given.
 	 * 
-	 * @param source must not be {@literal null}
-	 * @param expectedTargetType
-	 * @param pairs must not be {@literal null}
+	 * @param sourceType must not be {@literal null}.
+	 * @param requestedTargetType can be {@literal null}.
+	 * @param pairs must not be {@literal null}.
 	 * @return
 	 */
-	private static Class<?> getCustomTarget(Class<?> source, Class<?> expectedTargetType, Iterable<ConvertiblePair> pairs) {
+	private static Class<?> getCustomTarget(Class<?> sourceType, Class<?> requestedTargetType,
+			Iterable<ConvertiblePair> pairs) {
 
-		Assert.notNull(source);
+		Assert.notNull(sourceType);
 		Assert.notNull(pairs);
 
 		for (ConvertiblePair typePair : pairs) {
-			if (typePair.getSourceType().isAssignableFrom(source)) {
+			if (typePair.getSourceType().isAssignableFrom(sourceType)) {
 				Class<?> targetType = typePair.getTargetType();
-				if (expectedTargetType == null || targetType.isAssignableFrom(expectedTargetType)) {
+				if (requestedTargetType == null || targetType.isAssignableFrom(requestedTargetType)) {
 					return targetType;
 				}
 			}
@@ -274,21 +325,44 @@ public class CustomConversions {
 	}
 
 	/**
-	 * Returns whether the given type is a type that Mongo can handle basically.
+	 * Returns the actual target type for the given {@code sourceType} and {@code requestedTargetType}. Note that the
+	 * returned {@link Class} could be an assignable type to the given {@code requestedTargetType}.
 	 * 
-	 * @param type
+	 * @param sourceType must not be {@literal null}.
+	 * @param requestedTargetType can be {@literal null}.
 	 * @return
 	 */
-	private static boolean isMongoBasicType(Class<?> type) {
-		return MONGO_TYPES.contains(type);
+	private Class<?> getCustomReadTarget(Class<?> sourceType, Class<?> requestedTargetType) {
+
+		Assert.notNull(sourceType);
+
+		if (requestedTargetType == null) {
+			return null;
+		}
+
+		ConvertiblePair lookupKey = new ConvertiblePair(sourceType, requestedTargetType);
+		CacheValue readTargetTypeValue = customReadTargetTypes.get(lookupKey);
+
+		if (readTargetTypeValue != null) {
+			return readTargetTypeValue.getType();
+		}
+
+		readTargetTypeValue = CacheValue.of(getCustomTarget(sourceType, requestedTargetType, readingPairs));
+		CacheValue cacheValue = customReadTargetTypes.putIfAbsent(lookupKey, readTargetTypeValue);
+
+		return cacheValue != null ? cacheValue.getType() : readTargetTypeValue.getType();
 	}
 
+	@WritingConverter
 	private enum CustomToStringConverter implements GenericConverter {
+
 		INSTANCE;
 
 		public Set<ConvertiblePair> getConvertibleTypes() {
+
 			ConvertiblePair localeToString = new ConvertiblePair(Locale.class, String.class);
 			ConvertiblePair booleanToString = new ConvertiblePair(Character.class, String.class);
+
 			return new HashSet<ConvertiblePair>(Arrays.asList(localeToString, booleanToString));
 		}
 
@@ -296,4 +370,30 @@ public class CustomConversions {
 			return source.toString();
 		}
 	}
+
+	/**
+	 * Wrapper to safely store {@literal null} values in the type cache.
+	 * 
+	 * @author Patryk Wasik
+	 * @author Oliver Gierke
+	 * @author Thomas Darimont
+	 */
+	private static class CacheValue {
+
+		private static final CacheValue ABSENT = new CacheValue(null);
+
+		private final Class<?> type;
+
+		public CacheValue(Class<?> type) {
+			this.type = type;
+		}
+
+		public Class<?> getType() {
+			return type;
+		}
+
+		static CacheValue of(Class<?> type) {
+			return type == null ? ABSENT : new CacheValue(type);
+		}
+	}
 }

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/DBObjectAccessor.java

@@ -0,0 +1,123 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.convert;
+
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.Map;
+
+import org.springframework.data.mongodb.core.mapping.MongoPersistentProperty;
+import org.springframework.util.Assert;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+
+/**
+ * Wrapper value object for a {@link BasicDBObject} to be able to access raw values by {@link MongoPersistentProperty}
+ * references. The accessors will transparently resolve nested document values that a {@link MongoPersistentProperty}
+ * might refer to through a path expression in field names.
+ * 
+ * @author Oliver Gierke
+ */
+class DBObjectAccessor {
+
+	private final DBObject dbObject;
+
+	/**
+	 * Creates a new {@link DBObjectAccessor} for the given {@link DBObject}.
+	 * 
+	 * @param dbObject must be a {@link BasicDBObject} effectively, must not be {@literal null}.
+	 */
+	public DBObjectAccessor(DBObject dbObject) {
+
+		Assert.notNull(dbObject, "DBObject must not be null!");
+		Assert.isInstanceOf(BasicDBObject.class, dbObject, "Given DBObject must be a BasicDBObject!");
+
+		this.dbObject = dbObject;
+	}
+
+	/**
+	 * Puts the given value into the backing {@link DBObject} based on the coordinates defined through the given
+	 * {@link MongoPersistentProperty}. By default this will be the plain field name. But field names might also consist
+	 * of path traversals so we might need to create intermediate {@link BasicDBObject}s.
+	 * 
+	 * @param prop must not be {@literal null}.
+	 * @param value
+	 */
+	public void put(MongoPersistentProperty prop, Object value) {
+
+		Assert.notNull(prop, "MongoPersistentProperty must not be null!");
+		String fieldName = prop.getFieldName();
+
+		Iterator<String> parts = Arrays.asList(fieldName.split("\\.")).iterator();
+		DBObject dbObject = this.dbObject;
+
+		while (parts.hasNext()) {
+
+			String part = parts.next();
+
+			if (parts.hasNext()) {
+				BasicDBObject nestedDbObject = new BasicDBObject();
+				dbObject.put(part, nestedDbObject);
+				dbObject = nestedDbObject;
+			} else {
+				dbObject.put(part, value);
+			}
+		}
+	}
+
+	/**
+	 * Returns the value the given {@link MongoPersistentProperty} refers to. By default this will be a direct field but
+	 * the method will also transparently resolve nested values the {@link MongoPersistentProperty} might refer to through
+	 * a path expression in the field name metadata.
+	 * 
+	 * @param property must not be {@literal null}.
+	 * @return
+	 */
+	@SuppressWarnings("unchecked")
+	public Object get(MongoPersistentProperty property) {
+
+		String fieldName = property.getFieldName();
+		Iterator<String> parts = Arrays.asList(fieldName.split("\\.")).iterator();
+		Map<Object, Object> source = this.dbObject.toMap();
+		Object result = null;
+
+		while (source != null && parts.hasNext()) {
+
+			result = source.get(parts.next());
+
+			if (parts.hasNext()) {
+				source = getAsMap(result);
+			}
+		}
+
+		return result;
+	}
+
+	@SuppressWarnings("unchecked")
+	private Map<Object, Object> getAsMap(Object source) {
+
+		if (source instanceof BasicDBObject) {
+			return ((DBObject) source).toMap();
+		}
+
+		if (source instanceof Map) {
+			return (Map<Object, Object>) source;
+		}
+
+		return null;
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/DBObjectPropertyAccessor.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2012-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.convert;
+
+import java.util.Map;
+
+import org.springframework.context.expression.MapAccessor;
+import org.springframework.expression.EvaluationContext;
+import org.springframework.expression.PropertyAccessor;
+import org.springframework.expression.TypedValue;
+
+import com.mongodb.DBObject;
+
+/**
+ * {@link PropertyAccessor} to allow entity based field access to {@link DBObject}s.
+ * 
+ * @author Oliver Gierke
+ */
+class DBObjectPropertyAccessor extends MapAccessor {
+
+	static final MapAccessor INSTANCE = new DBObjectPropertyAccessor();
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.context.expression.MapAccessor#getSpecificTargetClasses()
+	 */
+	@Override
+	public Class<?>[] getSpecificTargetClasses() {
+		return new Class[] { DBObject.class };
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.context.expression.MapAccessor#canRead(org.springframework.expression.EvaluationContext, java.lang.Object, java.lang.String)
+	 */
+	@Override
+	public boolean canRead(EvaluationContext context, Object target, String name) {
+		return true;
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.context.expression.MapAccessor#read(org.springframework.expression.EvaluationContext, java.lang.Object, java.lang.String)
+	 */
+	@Override
+	@SuppressWarnings("unchecked")
+	public TypedValue read(EvaluationContext context, Object target, String name) {
+
+		Map<String, Object> source = (Map<String, Object>) target;
+
+		Object value = source.get(name);
+		return value == null ? TypedValue.NULL : new TypedValue(value);
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/DbRefResolver.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2013-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.convert;
+
+import org.springframework.data.mongodb.core.mapping.MongoPersistentEntity;
+import org.springframework.data.mongodb.core.mapping.MongoPersistentProperty;
+
+import com.mongodb.DBRef;
+
+/**
+ * Used to resolve associations annotated with {@link org.springframework.data.mongodb.core.mapping.DBRef}.
+ * 
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ * @since 1.4
+ */
+public interface DbRefResolver {
+
+	/**
+	 * Resolves the given {@link DBRef} into an object of the given {@link MongoPersistentProperty}'s type. The method
+	 * might return a proxy object for the {@link DBRef} or resolve it immediately. In both cases the
+	 * {@link DbRefResolverCallback} will be used to obtain the actual backing object.
+	 * 
+	 * @param property will never be {@literal null}.
+	 * @param dbref the {@link DBRef} to resolve.
+	 * @param callback will never be {@literal null}.
+	 * @return
+	 */
+	Object resolveDbRef(MongoPersistentProperty property, DBRef dbref, DbRefResolverCallback callback);
+
+	/**
+	 * Creates a {@link DBRef} instance for the given {@link org.springframework.data.mongodb.core.mapping.DBRef}
+	 * annotation, {@link MongoPersistentEntity} and id.
+	 * 
+	 * @param annotation will never be {@literal null}.
+	 * @param entity will never be {@literal null}.
+	 * @param id will never be {@literal null}.
+	 * @return
+	 */
+	DBRef createDbRef(org.springframework.data.mongodb.core.mapping.DBRef annotation, MongoPersistentEntity<?> entity,
+			Object id);
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/DbRefResolverCallback.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.convert;
+
+import org.springframework.data.mongodb.core.mapping.MongoPersistentProperty;
+
+/**
+ * Callback interface to be used in conjunction with {@link DbRefResolver}.
+ * 
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ */
+public interface DbRefResolverCallback {
+
+	/**
+	 * Resolve the final object for the given {@link MongoPersistentProperty}.
+	 * 
+	 * @param property will never be {@literal null}.
+	 * @return
+	 */
+	Object resolve(MongoPersistentProperty property);
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/DefaultDbRefResolver.java

@@ -0,0 +1,383 @@
+/*
+ * Copyright 2013-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mongodb.core.convert;
+
+import static org.springframework.util.ReflectionUtils.*;
+
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.Serializable;
+import java.lang.reflect.Method;
+
+import org.aopalliance.intercept.MethodInterceptor;
+import org.aopalliance.intercept.MethodInvocation;
+import org.springframework.aop.framework.ProxyFactory;
+import org.springframework.cglib.proxy.Callback;
+import org.springframework.cglib.proxy.Enhancer;
+import org.springframework.cglib.proxy.Factory;
+import org.springframework.cglib.proxy.MethodProxy;
+import org.springframework.dao.DataAccessException;
+import org.springframework.dao.support.PersistenceExceptionTranslator;
+import org.springframework.data.mongodb.LazyLoadingException;
+import org.springframework.data.mongodb.MongoDbFactory;
+import org.springframework.data.mongodb.core.mapping.MongoPersistentEntity;
+import org.springframework.data.mongodb.core.mapping.MongoPersistentProperty;
+import org.springframework.objenesis.ObjenesisStd;
+import org.springframework.util.Assert;
+import org.springframework.util.ReflectionUtils;
+import org.springframework.util.StringUtils;
+
+import com.mongodb.DB;
+import com.mongodb.DBRef;
+
+/**
+ * A {@link DbRefResolver} that resolves {@link org.springframework.data.mongodb.core.mapping.DBRef}s by delegating to a
+ * {@link DbRefResolverCallback} than is able to generate lazy loading proxies.
+ * 
+ * @author Thomas Darimont
+ * @author Oliver Gierke
+ * @since 1.4
+ */
+public class DefaultDbRefResolver implements DbRefResolver {
+
+	private final MongoDbFactory mongoDbFactory;
+	private final PersistenceExceptionTranslator exceptionTranslator;
+	private final ObjenesisStd objenesis;
+
+	/**
+	 * Creates a new {@link DefaultDbRefResolver} with the given {@link MongoDbFactory}.
+	 * 
+	 * @param mongoDbFactory must not be {@literal null}.
+	 */
+	public DefaultDbRefResolver(MongoDbFactory mongoDbFactory) {
+
+		Assert.notNull(mongoDbFactory, "MongoDbFactory translator must not be null!");
+
+		this.mongoDbFactory = mongoDbFactory;
+		this.exceptionTranslator = mongoDbFactory.getExceptionTranslator();
+		this.objenesis = new ObjenesisStd(true);
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.convert.DbRefResolver#resolveDbRef(org.springframework.data.mongodb.core.mapping.MongoPersistentProperty, org.springframework.data.mongodb.core.convert.DbRefResolverCallback)
+	 */
+	@Override
+	public Object resolveDbRef(MongoPersistentProperty property, DBRef dbref, DbRefResolverCallback callback) {
+
+		Assert.notNull(property, "Property must not be null!");
+		Assert.notNull(callback, "Callback must not be null!");
+
+		if (isLazyDbRef(property)) {
+			return createLazyLoadingProxy(property, dbref, callback);
+		}
+
+		return callback.resolve(property);
+	}
+
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.convert.DbRefResolver#created(org.springframework.data.mongodb.core.mapping.MongoPersistentProperty, org.springframework.data.mongodb.core.mapping.MongoPersistentEntity, java.lang.Object)
+	 */
+	@Override
+	public DBRef createDbRef(org.springframework.data.mongodb.core.mapping.DBRef annotation,
+			MongoPersistentEntity<?> entity, Object id) {
+
+		DB db = mongoDbFactory.getDb();
+		db = annotation != null && StringUtils.hasText(annotation.db()) ? mongoDbFactory.getDb(annotation.db()) : db;
+
+		return new DBRef(db, entity.getCollection(), id);
+	}
+
+	/**
+	 * Creates a proxy for the given {@link MongoPersistentProperty} using the given {@link DbRefResolverCallback} to
+	 * eventually resolve the value of the property.
+	 * 
+	 * @param property must not be {@literal null}.
+	 * @param dbref can be {@literal null}.
+	 * @param callback must not be {@literal null}.
+	 * @return
+	 */
+	private Object createLazyLoadingProxy(MongoPersistentProperty property, DBRef dbref, DbRefResolverCallback callback) {
+
+		Class<?> propertyType = property.getType();
+		LazyLoadingInterceptor interceptor = new LazyLoadingInterceptor(property, dbref, exceptionTranslator, callback);
+
+		if (!propertyType.isInterface()) {
+
+			Factory factory = (Factory) objenesis.newInstance(getEnhancedTypeFor(propertyType));
+			factory.setCallbacks(new Callback[] { interceptor });
+
+			return factory;
+		}
+
+		ProxyFactory proxyFactory = new ProxyFactory();
+
+		for (Class<?> type : propertyType.getInterfaces()) {
+			proxyFactory.addInterface(type);
+		}
+
+		proxyFactory.addInterface(LazyLoadingProxy.class);
+		proxyFactory.addInterface(propertyType);
+		proxyFactory.addAdvice(interceptor);
+
+		return proxyFactory.getProxy();
+	}
+
+	/**
+	 * Returns the CGLib enhanced type for the given source type.
+	 * 
+	 * @param type
+	 * @return
+	 */
+	private Class<?> getEnhancedTypeFor(Class<?> type) {
+
+		Enhancer enhancer = new Enhancer();
+		enhancer.setSuperclass(type);
+		enhancer.setCallbackType(org.springframework.cglib.proxy.MethodInterceptor.class);
+		enhancer.setInterfaces(new Class[] { LazyLoadingProxy.class });
+
+		return enhancer.createClass();
+	}
+
+	/**
+	 * Returns whether the property shall be resolved lazily.
+	 * 
+	 * @param property must not be {@literal null}.
+	 * @return
+	 */
+	private boolean isLazyDbRef(MongoPersistentProperty property) {
+		return property.getDBRef() != null && property.getDBRef().lazy();
+	}
+
+	/**
+	 * A {@link MethodInterceptor} that is used within a lazy loading proxy. The property resolving is delegated to a
+	 * {@link DbRefResolverCallback}. The resolving process is triggered by a method invocation on the proxy and is
+	 * guaranteed to be performed only once.
+	 * 
+	 * @author Thomas Darimont
+	 * @author Oliver Gierke
+	 */
+	static class LazyLoadingInterceptor implements MethodInterceptor, org.springframework.cglib.proxy.MethodInterceptor,
+			Serializable {
+
+		private static final Method INITIALIZE_METHOD, TO_DBREF_METHOD;
+
+		private final DbRefResolverCallback callback;
+		private final MongoPersistentProperty property;
+		private final PersistenceExceptionTranslator exceptionTranslator;
+
+		private volatile boolean resolved;
+		private Object result;
+		private DBRef dbref;
+
+		static {
+			try {
+				INITIALIZE_METHOD = LazyLoadingProxy.class.getMethod("initialize");
+				TO_DBREF_METHOD = LazyLoadingProxy.class.getMethod("toDBRef");
+			} catch (Exception e) {
+				throw new RuntimeException(e);
+			}
+		}
+
+		/**
+		 * Creates a new {@link LazyLoadingInterceptor} for the given {@link MongoPersistentProperty},
+		 * {@link PersistenceExceptionTranslator} and {@link DbRefResolverCallback}.
+		 * 
+		 * @param property must not be {@literal null}.
+		 * @param dbref can be {@literal null}.
+		 * @param callback must not be {@literal null}.
+		 */
+		public LazyLoadingInterceptor(MongoPersistentProperty property, DBRef dbref,
+				PersistenceExceptionTranslator exceptionTranslator, DbRefResolverCallback callback) {
+
+			Assert.notNull(property, "Property must not be null!");
+			Assert.notNull(exceptionTranslator, "Exception translator must not be null!");
+			Assert.notNull(callback, "Callback must not be null!");
+
+			this.dbref = dbref;
+			this.callback = callback;
+			this.exceptionTranslator = exceptionTranslator;
+			this.property = property;
+		}
+
+		/*
+		 * (non-Javadoc)
+		 * @see org.aopalliance.intercept.MethodInterceptor#invoke(org.aopalliance.intercept.MethodInvocation)
+		 */
+		@Override
+		public Object invoke(MethodInvocation invocation) throws Throwable {
+			return intercept(invocation.getThis(), invocation.getMethod(), invocation.getArguments(), null);
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see org.springframework.cglib.proxy.MethodInterceptor#intercept(java.lang.Object, java.lang.reflect.Method, java.lang.Object[], org.springframework.cglib.proxy.MethodProxy)
+		 */
+		@Override
+		public Object intercept(Object obj, Method method, Object[] args, MethodProxy proxy) throws Throwable {
+
+			if (INITIALIZE_METHOD.equals(method)) {
+				return ensureResolved();
+			}
+
+			if (TO_DBREF_METHOD.equals(method)) {
+				return this.dbref;
+			}
+
+			if (isObjectMethod(method) && Object.class.equals(method.getDeclaringClass())) {
+
+				if (ReflectionUtils.isToStringMethod(method)) {
+					return proxyToString(proxy);
+				}
+
+				if (ReflectionUtils.isEqualsMethod(method)) {
+					return proxyEquals(proxy, args[0]);
+				}
+
+				if (ReflectionUtils.isHashCodeMethod(method)) {
+					return proxyHashCode(proxy);
+				}
+			}
+
+			Object target = ensureResolved();
+
+			if (target == null) {
+				return null;
+			}
+
+			return method.invoke(target, args);
+		}
+
+		/**
+		 * Returns a to string representation for the given {@code proxy}.
+		 * 
+		 * @param proxy
+		 * @return
+		 */
+		private String proxyToString(Object proxy) {
+
+			StringBuilder description = new StringBuilder();
+			if (dbref != null) {
+				description.append(dbref.getRef());
+				description.append(":");
+				description.append(dbref.getId());
+			} else {
+				description.append(System.identityHashCode(proxy));
+			}
+			description.append("$").append(LazyLoadingProxy.class.getSimpleName());
+
+			return description.toString();
+		}
+
+		/**
+		 * Returns the hashcode for the given {@code proxy}.
+		 * 
+		 * @param proxy
+		 * @return
+		 */
+		private int proxyHashCode(Object proxy) {
+			return proxyToString(proxy).hashCode();
+		}
+
+		/**
+		 * Performs an equality check for the given {@code proxy}.
+		 * 
+		 * @param proxy
+		 * @param that
+		 * @return
+		 */
+		private boolean proxyEquals(Object proxy, Object that) {
+
+			if (!(that instanceof LazyLoadingProxy)) {
+				return false;
+			}
+
+			if (that == proxy) {
+				return true;
+			}
+
+			return proxyToString(proxy).equals(that.toString());
+		}
+
+		/**
+		 * Will trigger the resolution if the proxy is not resolved already or return a previously resolved result.
+		 * 
+		 * @return
+		 */
+		private Object ensureResolved() {
+
+			if (!resolved) {
+				this.result = resolve();
+				this.resolved = true;
+			}
+
+			return this.result;
+		}
+
+		/**
+		 * Callback method for serialization.
+		 * 
+		 * @param out
+		 * @throws IOException
+		 */
+		private void writeObject(ObjectOutputStream out) throws IOException {
+
+			ensureResolved();
+			out.writeObject(this.result);
+		}
+
+		/**
+		 * Callback method for deserialization.
+		 * 
+		 * @param in
+		 * @throws IOException
+		 */
+		private void readObject(ObjectInputStream in) throws IOException {
+
+			try {
+				this.resolved = true;
+				this.result = in.readObject();
+			} catch (ClassNotFoundException e) {
+				throw new LazyLoadingException("Could not deserialize result", e);
+			}
+		}
+
+		/**
+		 * Resolves the proxy into its backing object.
+		 * 
+		 * @return
+		 */
+		private synchronized Object resolve() {
+
+			if (!resolved) {
+
+				try {
+
+					return callback.resolve(property);
+
+				} catch (RuntimeException ex) {
+
+					DataAccessException translatedException = this.exceptionTranslator.translateExceptionIfPossible(ex);
+					throw new LazyLoadingException("Unable to lazily resolve DBRef!", translatedException);
+				}
+			}
+
+			return result;
+		}
+	}
+}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/DefaultMongoTypeMapper.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2011 the original author or authors.
+ * Copyright 2011-2013 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,16 +18,19 @@ package org.springframework.data.mongodb.core.convert;
 import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
-import org.springframework.data.convert.SimpleTypeInformationMapper;
 import org.springframework.data.convert.DefaultTypeMapper;
+import org.springframework.data.convert.SimpleTypeInformationMapper;
 import org.springframework.data.convert.TypeAliasAccessor;
 import org.springframework.data.convert.TypeInformationMapper;
 import org.springframework.data.mapping.PersistentEntity;
 import org.springframework.data.mapping.context.MappingContext;
 import org.springframework.data.util.ClassTypeInformation;
 import org.springframework.data.util.TypeInformation;
+
 import com.mongodb.BasicDBList;
+import com.mongodb.BasicDBObject;
 import com.mongodb.DBObject;
 
 /**
@@ -37,36 +40,45 @@ import com.mongodb.DBObject;
  * respectively.
  * 
  * @author Oliver Gierke
+ * @author Thomas Darimont
  */
 public class DefaultMongoTypeMapper extends DefaultTypeMapper<DBObject> implements MongoTypeMapper {
 
 	public static final String DEFAULT_TYPE_KEY = "_class";
-	@SuppressWarnings("rawtypes")
+	@SuppressWarnings("rawtypes")//
 	private static final TypeInformation<List> LIST_TYPE_INFO = ClassTypeInformation.from(List.class);
-	@SuppressWarnings("rawtypes")
+	@SuppressWarnings("rawtypes")//
 	private static final TypeInformation<Map> MAP_TYPE_INFO = ClassTypeInformation.from(Map.class);
-	private String typeKey = DEFAULT_TYPE_KEY;
+
+	private final TypeAliasAccessor<DBObject> accessor;
+	private final String typeKey;
 
 	public DefaultMongoTypeMapper() {
-		this(DEFAULT_TYPE_KEY, Arrays.asList(SimpleTypeInformationMapper.INSTANCE));
+		this(DEFAULT_TYPE_KEY);
 	}
-	
+
 	public DefaultMongoTypeMapper(String typeKey) {
-		super(new DBObjectTypeAliasAccessor(typeKey));
-		this.typeKey = typeKey;
+		this(typeKey, Arrays.asList(SimpleTypeInformationMapper.INSTANCE));
 	}
-	
-	public DefaultMongoTypeMapper(String typeKey, MappingContext<? extends PersistentEntity<?,?>, ?> mappingContext) {
-		super(new DBObjectTypeAliasAccessor(typeKey), mappingContext, Arrays.asList(SimpleTypeInformationMapper.INSTANCE));
-		this.typeKey = typeKey;
+
+	public DefaultMongoTypeMapper(String typeKey, MappingContext<? extends PersistentEntity<?, ?>, ?> mappingContext) {
+		this(typeKey, new DBObjectTypeAliasAccessor(typeKey), mappingContext, Arrays
+				.asList(SimpleTypeInformationMapper.INSTANCE));
 	}
-	
+
 	public DefaultMongoTypeMapper(String typeKey, List<? extends TypeInformationMapper> mappers) {
-		super(new DBObjectTypeAliasAccessor(typeKey), mappers);
-		this.typeKey = typeKey;
+		this(typeKey, new DBObjectTypeAliasAccessor(typeKey), null, mappers);
 	}
-	
-	
+
+	private DefaultMongoTypeMapper(String typeKey, TypeAliasAccessor<DBObject> accessor,
+			MappingContext<? extends PersistentEntity<?, ?>, ?> mappingContext, List<? extends TypeInformationMapper> mappers) {
+
+		super(accessor, mappingContext, mappers);
+
+		this.typeKey = typeKey;
+		this.accessor = accessor;
+	}
+
 	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.mongodb.core.convert.MongoTypeMapper#isTypeKey(java.lang.String)
@@ -75,6 +87,30 @@ public class DefaultMongoTypeMapper extends DefaultTypeMapper<DBObject> implemen
 		return typeKey == null ? false : typeKey.equals(key);
 	}
 
+	/* 
+	 * (non-Javadoc)
+	 * @see org.springframework.data.mongodb.core.convert.MongoTypeMapper#writeTypeRestrictions(java.util.Set)
+	 */
+	@Override
+	public void writeTypeRestrictions(DBObject result, Set<Class<?>> restrictedTypes) {
+
+		if (restrictedTypes == null || restrictedTypes.isEmpty()) {
+			return;
+		}
+
+		BasicDBList restrictedMappedTypes = new BasicDBList();
+
+		for (Class<?> restrictedType : restrictedTypes) {
+
+			Object typeAlias = getAliasFor(ClassTypeInformation.from(restrictedType));
+
+			if (typeAlias != null) {
+				restrictedMappedTypes.add(typeAlias);
+			}
+		}
+
+		accessor.writeTypeTo(result, new BasicDBObject("$in", restrictedMappedTypes));
+	}
 
 	/* (non-Javadoc)
 	 * @see org.springframework.data.convert.DefaultTypeMapper#getFallbackTypeFor(java.lang.Object)
@@ -83,29 +119,30 @@ public class DefaultMongoTypeMapper extends DefaultTypeMapper<DBObject> implemen
 	protected TypeInformation<?> getFallbackTypeFor(DBObject source) {
 		return source instanceof BasicDBList ? LIST_TYPE_INFO : MAP_TYPE_INFO;
 	}
-	
+
 	/**
+	 * {@link TypeAliasAccessor} to store aliases in a {@link DBObject}.
 	 * 
 	 * @author Oliver Gierke
 	 */
 	public static final class DBObjectTypeAliasAccessor implements TypeAliasAccessor<DBObject> {
-		
+
 		private final String typeKey;
-		
+
 		public DBObjectTypeAliasAccessor(String typeKey) {
 			this.typeKey = typeKey;
 		}
-		
+
 		/*
 		 * (non-Javadoc)
 		 * @see org.springframework.data.convert.TypeAliasAccessor#readAliasFrom(java.lang.Object)
 		 */
 		public Object readAliasFrom(DBObject source) {
-			
+
 			if (source instanceof BasicDBList) {
 				return null;
 			}
-			
+
 			return source.get(typeKey);
 		}