[maven-release-plugin] prepare release record-builder-1.14.ea

Stop relying on toString() to detect package name.

.github/workflows/maven.yml

@@ -0,0 +1,24 @@
+# This workflow will build a Java project with Maven
+# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
+
+name: Java CI with Maven
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up JDK
+      uses: actions/setup-java@v1
+      with:
+        java-version: 15
+    - name: Build with Maven
+      run: mvn -B package --file pom.xml

.travis.yml

@@ -1,3 +0,0 @@
-language: java
-jdk:
-  - openjdk15

README.md

@@ -1,4 +1,4 @@
-[![Build Status](https://travis-ci.org/Randgalt/record-builder.svg?branch=master)](https://travis-ci.org/Randgalt/record-builder)
+[![Build Status](https://github.com/Randgalt/record-builder/workflows/Java%20CI%20with%20Maven/badge.svg)](https://github.com/Randgalt/record-builder/actions)
 [![Maven Central](https://img.shields.io/maven-central/v/io.soabase.record-builder/record-builder.svg)](https://search.maven.org/search?q=g:io.soabase.record-builder%20a:record-builder)
 
 # RecordBuilder - Early Access
@@ -19,6 +19,9 @@ _Details:_
 - [Wither Details](#Wither-Example)
 - [RecordBuilder Full Definition](#Builder-Class-Definition)
 - [Record From Interface Details](#RecordInterface-Example)
+- [Generation Via Includes](#generation-via-includes)
+- [Usage](#usage)
+- [Customizing](#customizing)
 
 ## RecordBuilder Example
 
@@ -31,16 +34,21 @@ This will generate a builder class that can be used ala:
 
 ```java
 // build from components
-var n1 = NameAndAgeBuilder.builder().name(aName).age(anAge).build();
+NameAndAge n1 = NameAndAgeBuilder.builder().name(aName).age(anAge).build();
 
 // generate a copy with a changed value
-var n2 = NameAndAgeBuilder.builder(n1).age(newAge).build(); // name is the same as the name in n1
+NameAndAge n2 = NameAndAgeBuilder.builder(n1).age(newAge).build(); // name is the same as the name in n1
 
 // pass to other methods to set components
 var builder = new NameAndAgeBuilder();
 setName(builder);
 setAge(builder);
-var n3 = builder.build();
+NameAndAge n3 = builder.build();
+
+// use the generated static constructor/builder
+import static NameAndAgeBuilder.NameAndAge;
+...
+var n4 = NameAndAge("hey", 42);
 ```
 
 ## Wither Example
@@ -53,12 +61,15 @@ public record NameAndAge(String name, int age) implements NameAndAgeBuilder.With
 In addition to creating a builder, your record is enhanced by "wither" methods ala:
 
 ```java
-var r1 = new NameAndAge("foo", 123);
-var r2 = r1.withName("bar");
-var r3 = r2.withAge(456);
+NameAndAge r1 = new NameAndAge("foo", 123);
+NameAndAge r2 = r1.withName("bar");
+NameAndAge r3 = r2.withAge(456);
 
-// access the builder as well:
-var r4 = r3.with().age(101).name("baz").build();
+// access the builder as well
+NameAndAge r4 = r3.with().age(101).name("baz").build();
+
+// alternate method of accessing the builder (note: no need to call "build()")
+NameAndAge r5 = r4.with(b -> b.age(200).name("whatever"));
 ```
 
 _Hat tip to [Benji Weber](https://benjiweber.co.uk/blog/2020/09/19/fun-with-java-records/) for the Withers idea._
@@ -81,6 +92,13 @@ public class NameAndAgeBuilder {
         this.age = age;
     }
 
+    /**
+     * Static constructor/builder. Can be used instead of new NameAndAge(...)
+     */
+    public static NameAndAge NameAndAge(String name, int age) {
+        return new NameAndAge(name, age);
+    }
+
     /**
      * Return a new builder with all fields set to default Java values
      */
@@ -157,31 +175,45 @@ public class NameAndAgeBuilder {
                 && (age == b.age));
     }
 
+    /**
+     * Downcast to {@code NameAndAge}
+     */
+    private static NameAndAge _downcast(Object obj) {
+        try {
+            return (NameAndAge)obj;
+        }
+        catch (ClassCastException dummy) {
+            throw new RuntimeException("NameAndAgeBuilder.With can only be implemented for NameAndAge");
+        }
+    }
+
     /**
      * Add withers to {@code NameAndAge}
      */
     public interface With {
-        /**
-         * Cast this to the record type
-         */
-        default NameAndAge internalGetThis() {
-            Object obj = this;
-            return (PersonRecord)obj;
-        }
-
         /**
          * Return a new record builder using the current values
          */
         default NameAndAgeBuilder with() {
-            NameAndAge r = internalGetThis();
+            NameAndAge r = _downcast(this);
             return NameAndAgeBuilder.builder(r);
         }
 
+        /**
+         * Return a new record built from the builder passed to the given consumer
+         */
+        default NameAndAge with(Consumer<NameAndAgeBuilder> consumer) {
+            NameAndAge r = _downcast(this);
+            NameAndAgeBuilder builder = NameAndAgeBuilder.builder(r);
+            consumer.accept(builder);
+            return builder.build();
+        }
+
         /**
          * Return a new instance of {@code NameAndAge} with a new value for {@code name}
          */
         default NameAndAge withName(String name) {
-            NameAndAge r = internalGetThis();
+            NameAndAge r = _downcast(this);
             return new NameAndAge(name, r.age());
         }
 
@@ -189,7 +221,7 @@ public class NameAndAgeBuilder {
          * Return a new instance of {@code NameAndAge} with a new value for {@code age}
          */
         default NameAndAge withAge(int age) {
-            NameAndAge r = internalGetThis();
+            NameAndAge r = _downcast(this);
             return new NameAndAge(r.name(), age);
         }
     }
@@ -210,7 +242,8 @@ This will generate a record ala:
 
 ```java
 @RecordBuilder
-public record NameAndAgeRecord(String name, int age) implements NameAndAge {}
+public record NameAndAgeRecord(String name, int age) implements 
+    NameAndAge, NameAndAgeRecordBuilder.With {}
 ```
 
 Note that the generated record is annotated with `@RecordBuilder` so a record
@@ -225,6 +258,31 @@ Notes:
 - Methods with default implementations are used in the generation unless they are annotated with `@IgnoreDefaultMethod`
 - If you do not want a record builder generated, annotate your interface as `@RecordInterface(addRecordBuilder = false)`
 
+## Generation Via Includes
+
+An alternate method of generation is to use the Include variants of the annotations. These variants
+act on lists of specified classes. This allows the source classes to be pristine or even come from
+libraries where you are not able to annotate the source. 
+
+E.g.
+
+```
+import some.library.code.ImportedRecord
+import some.library.code.ImportedInterface
+
+@RecordBuilder.Include({
+    ImportedRecord.class    // generates a record builder for ImportedRecord  
+})
+@RecordInterface.Include({
+    ImportedInterface.class // generates a record interface for ImportedInterface 
+})
+public void Placeholder {
+}
+```
+
+The target package for generation is the same as the package that contains the "Include"
+annotation. Use `packagePattern` to change this (see Javadoc for details).  
+
 ## Usage
 
 ### Maven
@@ -327,7 +385,6 @@ Alternatively, you can provide values for each individual meta data (or combinat
 - `javac ... -AcomponentsMethodName=foo`
 - `javac ... -AwithClassName=foo`
 - `javac ... -AwithClassMethodPrefix=foo`
-- `javac ... -AwithClassGetThisMethodName=foo`
 - `javac ... -AfileComment=foo`
 - `javac ... -AfileIndent=foo`
 - `javac ... -AprefixEnclosingClassNames=foo`

pom.xml

@@ -5,7 +5,7 @@
     <groupId>io.soabase.record-builder</groupId>
     <artifactId>record-builder</artifactId>
     <packaging>pom</packaging>
-    <version>1.8.ea</version>
+    <version>1.14.ea</version>
 
     <modules>
         <module>record-builder-core</module>
@@ -71,7 +71,7 @@
         <url>https://github.com/randgalt/record-builder</url>
         <connection>scm:git:https://github.com/randgalt/record-builder.git</connection>
         <developerConnection>scm:git:git@github.com:randgalt/record-builder.git</developerConnection>
-        <tag>record-builder-1.8.ea</tag>
+        <tag>record-builder-1.14.ea</tag>
     </scm>
 
     <issueManagement>

record-builder-core/pom.xml

@@ -3,7 +3,7 @@
     <parent>
         <groupId>io.soabase.record-builder</groupId>
         <artifactId>record-builder</artifactId>
-        <version>1.8.ea</version>
+        <version>1.14.ea</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

record-builder-core/src/main/java/io/soabase/recordbuilder/core/RecordBuilder.java

@@ -23,4 +23,19 @@ import java.lang.annotation.Target;
 @Retention(RetentionPolicy.SOURCE)
 @Target(ElementType.TYPE)
 public @interface RecordBuilder {
+    @Target({ElementType.TYPE, ElementType.PACKAGE})
+    @Retention(RetentionPolicy.SOURCE)
+    @interface Include {
+        Class<?>[] value();
+
+        /**
+         * Pattern used to generate the package for the generated class. The value
+         * is the literal package name however two replacement values can be used. '@'
+         * is replaced with the package of the Include annotation. '*' is replaced with
+         * the package of the included class.
+         *
+         * @return package pattern
+         */
+        String packagePattern() default "@";
+    }
 }

record-builder-core/src/main/java/io/soabase/recordbuilder/core/RecordBuilderMetaData.java

@@ -78,6 +78,15 @@ public interface RecordBuilderMetaData {
         return "build";
     }
 
+    /**
+     * The name to use for the downcast method
+     *
+     * @return downcast method
+     */
+    default String downCastMethodName() {
+        return "_downcast";
+    }
+
     /**
      * The name to use for the method that returns the record components as a stream
      *
@@ -105,15 +114,6 @@ public interface RecordBuilderMetaData {
         return "with";
     }
 
-    /**
-     * The name to use for the method that returns "this" cast to the record type
-     *
-     * @return method name
-     */
-    default String withClassGetThisMethodName() {
-        return "internalGetThis";
-    }
-
     /**
      * Return the comment to place at the top of generated files. Return null or an empty string for no comment.
      *

record-builder-core/src/main/java/io/soabase/recordbuilder/core/RecordInterface.java

@@ -24,4 +24,22 @@ import java.lang.annotation.Target;
 @Target(ElementType.TYPE)
 public @interface RecordInterface {
     boolean addRecordBuilder() default true;
+
+    @Target({ElementType.TYPE, ElementType.PACKAGE})
+    @Retention(RetentionPolicy.SOURCE)
+    @interface Include {
+        Class<?>[] value();
+
+        boolean addRecordBuilder() default true;
+
+        /**
+         * Pattern used to generate the package for the generated class. The value
+         * is the literal package name however two replacement values can be used. '@'
+         * is replaced with the package of the Include annotation. '*' is replaced with
+         * the package of the included class.
+         *
+         * @return package pattern
+         */
+        String packagePattern() default "@";
+    }
 }

record-builder-core/src/main/java/module-info.java

@@ -0,0 +1,19 @@
+/**
+ * Copyright 2019 Jordan Zimmerman
+ *
+ * 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.
+ */
+module io.soabase.record.builder.core {
+    exports io.soabase.recordbuilder.core;
+    opens io.soabase.recordbuilder.core;
+}

record-builder-processor/pom.xml

@@ -3,7 +3,7 @@
     <parent>
         <groupId>io.soabase.record-builder</groupId>
         <artifactId>record-builder</artifactId>
-        <version>1.8.ea</version>
+        <version>1.14.ea</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

record-builder-processor/src/main/java/io/soabase/recordbuilder/processor/ElementUtils.java

@@ -20,14 +20,63 @@ import com.squareup.javapoet.ParameterizedTypeName;
 import com.squareup.javapoet.TypeName;
 import com.squareup.javapoet.TypeVariableName;
 import io.soabase.recordbuilder.core.RecordBuilderMetaData;
-
+import javax.annotation.processing.ProcessingEnvironment;
+import javax.lang.model.element.AnnotationMirror;
+import javax.lang.model.element.AnnotationValue;
 import javax.lang.model.element.Element;
+import javax.lang.model.element.ExecutableElement;
 import javax.lang.model.element.RecordComponentElement;
 import javax.lang.model.element.TypeElement;
 import javax.lang.model.element.TypeParameterElement;
+import javax.lang.model.type.TypeMirror;
+import java.util.Collections;
 import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.stream.Collectors;
 
 public class ElementUtils {
+    public static Optional<? extends AnnotationMirror> findAnnotationMirror(ProcessingEnvironment processingEnv, Element element, String annotationClass) {
+        return processingEnv.getElementUtils().getAllAnnotationMirrors(element).stream()
+            .filter(e -> e.getAnnotationType().toString().equals(annotationClass))
+            .findFirst();
+    }
+
+    public static Optional<? extends AnnotationValue> getAnnotationValue(Map<? extends ExecutableElement, ? extends AnnotationValue> values, String name) {
+        return values.entrySet()
+            .stream()
+            .filter(e -> e.getKey().getSimpleName().toString().equals(name))
+            .map(Map.Entry::getValue)
+            .findFirst();
+    }
+
+    @SuppressWarnings("unchecked")
+    public static List<TypeMirror> getClassesAttribute(AnnotationValue attribute)
+    {
+        List<? extends AnnotationValue> values = (attribute != null) ? (List<? extends AnnotationValue>)attribute.getValue() : Collections.emptyList();
+        return values.stream().map(v -> (TypeMirror)v.getValue()).collect(Collectors.toList());
+    }
+
+    public static boolean getBooleanAttribute(AnnotationValue attribute)
+    {
+        Object value = (attribute != null) ? attribute.getValue() : null;
+        if ( value != null )
+        {
+            return Boolean.parseBoolean(String.valueOf(value));
+        }
+        return false;
+    }
+
+    public static String getStringAttribute(AnnotationValue attribute, String defaultValue)
+    {
+        Object value = (attribute != null) ? attribute.getValue() : null;
+        if ( value != null )
+        {
+            return String.valueOf(value);
+        }
+        return defaultValue;
+    }
+
     public static String getPackageName(TypeElement typeElement) {
         while (typeElement.getNestingKind().isNested()) {
             Element enclosingElement = typeElement.getEnclosingElement();
@@ -37,8 +86,9 @@ public class ElementUtils {
                 break;
             }
         }
-        String name = typeElement.getEnclosingElement().toString();
-        return !name.equals("unnamed package") ? name : "";
+        String name = typeElement.getQualifiedName().toString();
+        int index = name.lastIndexOf(".");
+        return (index > -1) ? name.substring(0, index) : "";
     }
 
     public static ClassType getClassType(String packageName, String simpleName, List<? extends TypeParameterElement> typeParameters) {

record-builder-processor/src/main/java/io/soabase/recordbuilder/processor/InternalRecordBuilderProcessor.java

@@ -15,15 +15,26 @@
  */
 package io.soabase.recordbuilder.processor;
 
-import com.squareup.javapoet.*;
+import com.squareup.javapoet.ClassName;
+import com.squareup.javapoet.CodeBlock;
+import com.squareup.javapoet.FieldSpec;
+import com.squareup.javapoet.MethodSpec;
+import com.squareup.javapoet.ParameterSpec;
+import com.squareup.javapoet.ParameterizedTypeName;
+import com.squareup.javapoet.TypeName;
+import com.squareup.javapoet.TypeSpec;
+import com.squareup.javapoet.TypeVariableName;
 import io.soabase.recordbuilder.core.RecordBuilderMetaData;
 
 import javax.lang.model.element.Modifier;
 import javax.lang.model.element.TypeElement;
+
 import java.util.AbstractMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
+import java.util.Optional;
+import java.util.function.Consumer;
 import java.util.stream.Collectors;
 import java.util.stream.IntStream;
 import java.util.stream.Stream;
@@ -32,7 +43,8 @@ import static io.soabase.recordbuilder.processor.ElementUtils.getBuilderName;
 import static io.soabase.recordbuilder.processor.ElementUtils.getWithMethodName;
 import static io.soabase.recordbuilder.processor.RecordBuilderProcessor.generatedRecordBuilderAnnotation;
 
-class InternalRecordBuilderProcessor {
+class InternalRecordBuilderProcessor
+{
     private final RecordBuilderMetaData metaData;
     private final ClassType recordClassType;
     private final String packageName;
@@ -41,14 +53,17 @@ class InternalRecordBuilderProcessor {
     private final List<ClassType> recordComponents;
     private final TypeSpec builderType;
     private final TypeSpec.Builder builder;
+    private final String uniqueVarName;
 
-    InternalRecordBuilderProcessor(TypeElement record, RecordBuilderMetaData metaData) {
+    InternalRecordBuilderProcessor(TypeElement record, RecordBuilderMetaData metaData, Optional<String> packageNameOpt)
+    {
         this.metaData = metaData;
         recordClassType = ElementUtils.getClassType(record, record.getTypeParameters());
-        packageName = ElementUtils.getPackageName(record);
+        packageName = packageNameOpt.orElseGet(() -> ElementUtils.getPackageName(record));
         builderClassType = ElementUtils.getClassType(packageName, getBuilderName(record, metaData, recordClassType, metaData.suffix()), record.getTypeParameters());
         typeVariables = record.getTypeParameters().stream().map(TypeVariableName::get).collect(Collectors.toList());
         recordComponents = record.getRecordComponents().stream().map(ElementUtils::getClassType).collect(Collectors.toList());
+        uniqueVarName = getUniqueVarName();
 
         builder = TypeSpec.classBuilder(builderClassType.name())
                 .addModifiers(Modifier.PUBLIC)
@@ -56,7 +71,10 @@ class InternalRecordBuilderProcessor {
                 .addTypeVariables(typeVariables);
         addWithNestedClass();
         addDefaultConstructor();
-        addAllArgsConstructor();
+        addStaticBuilder();
+        if (recordComponents.size() > 0) {
+            addAllArgsConstructor();
+        }
         addStaticDefaultBuilderMethod();
         addStaticCopyBuilderMethod();
         addStaticComponentsMethod();
@@ -69,22 +87,27 @@ class InternalRecordBuilderProcessor {
             add1SetterMethod(component);
             add1GetterMethod(component);
         });
+        addStaticDowncastMethod();
         builderType = builder.build();
     }
 
-    String packageName() {
+    String packageName()
+    {
         return packageName;
     }
 
-    ClassType builderClassType() {
+    ClassType builderClassType()
+    {
         return builderClassType;
     }
 
-    TypeSpec builderType() {
+    TypeSpec builderType()
+    {
         return builderType;
     }
 
-    private void addWithNestedClass() {
+    private void addWithNestedClass()
+    {
         /*
             Adds a nested interface that adds withers similar to:
 
@@ -94,45 +117,61 @@ class InternalRecordBuilderProcessor {
                 }
             }
          */
-        TypeSpec.Builder classBuilder = TypeSpec.interfaceBuilder(metaData.withClassName())
+        var classBuilder = TypeSpec.interfaceBuilder(metaData.withClassName())
                 .addAnnotation(generatedRecordBuilderAnnotation)
                 .addJavadoc("Add withers to {@code $L}\n", recordClassType.name())
                 .addModifiers(Modifier.PUBLIC)
                 .addTypeVariables(typeVariables);
-        addWithGetThisMethod(classBuilder);
         addWithBuilderMethod(classBuilder);
+        addWithSuppliedBuilderMethod(classBuilder);
         IntStream.range(0, recordComponents.size()).forEach(index -> add1WithMethod(classBuilder, recordComponents.get(index), index));
         builder.addType(classBuilder.build());
     }
 
-    private void addWithGetThisMethod(TypeSpec.Builder classBuilder) {
+    private void addWithSuppliedBuilderMethod(TypeSpec.Builder classBuilder)
+    {
         /*
-            Adds a method that returns "this" cast to the record similar to:
+            Adds a method that returns a pre-filled copy builder similar to:
 
-            default MyRecord internalGetThis() {
-                Object obj = this;
-                return (MyRecord)obj;
+            default MyRecord with(Consumer<MyRecordBuilder> consumer) {
+                MyRecord r = (MyRecord)(Object)this;
+                MyRecordBuilder builder MyRecordBuilder.builder(r);
+                consumer.accept(builder);
+                return builder.build();
             }
          */
-        CodeBlock codeBlock = CodeBlock.builder()
-                .add("Object obj = this;\n")
-                .add("return ($T)obj;", recordClassType.typeName())
-                .build();
-        MethodSpec methodSpec = MethodSpec.methodBuilder(metaData.withClassGetThisMethodName())
+        var codeBlockBuilder = CodeBlock.builder()
+                .add("$T $L = $L(this);\n", recordClassType.typeName(), uniqueVarName, metaData.downCastMethodName())
+                .add("$T builder = $L.$L($L);\n", builderClassType.typeName(), builderClassType.name(), metaData.copyMethodName(), uniqueVarName)
+                .add("consumer.accept(builder);\n")
+                .add("return builder.build();\n");
+        var consumerType = ParameterizedTypeName.get(ClassName.get(Consumer.class), builderClassType.typeName());
+        var parameter = ParameterSpec.builder(consumerType, "consumer").build();
+        var methodSpec = MethodSpec.methodBuilder(metaData.withClassMethodPrefix())
                 .addAnnotation(generatedRecordBuilderAnnotation)
-                .addJavadoc("Cast this to the record type")
+                .addJavadoc("Return a new record built from the builder passed to the given consumer")
                 .addModifiers(Modifier.PUBLIC, Modifier.DEFAULT)
+                .addParameter(parameter)
                 .returns(recordClassType.typeName())
-                .addCode(codeBlock)
+                .addCode(codeBlockBuilder.build())
                 .build();
         classBuilder.addMethod(methodSpec);
     }
 
-    private void addWithBuilderMethod(TypeSpec.Builder classBuilder) {
-        CodeBlock.Builder codeBlockBuilder = CodeBlock.builder()
-                .add("$T r = $L();\n", recordClassType.typeName(), metaData.withClassGetThisMethodName())
-                .add("return $L.$L(r);", builderClassType.name(), metaData.copyMethodName());
-        MethodSpec methodSpec = MethodSpec.methodBuilder(metaData.withClassMethodPrefix())
+    private void addWithBuilderMethod(TypeSpec.Builder classBuilder)
+    {
+        /*
+            Adds a method that returns a pre-filled copy builder similar to:
+
+            default MyRecordBuilder with() {
+                MyRecord r = (MyRecord)(Object)this;
+                return MyRecordBuilder.builder(r);
+            }
+         */
+        var codeBlockBuilder = CodeBlock.builder()
+                .add("$T $L = $L(this);\n", recordClassType.typeName(), uniqueVarName, metaData.downCastMethodName())
+                .add("return $L.$L($L);", builderClassType.name(), metaData.copyMethodName(), uniqueVarName);
+        var methodSpec = MethodSpec.methodBuilder(metaData.withClassMethodPrefix())
                 .addAnnotation(generatedRecordBuilderAnnotation)
                 .addJavadoc("Return a new record builder using the current values")
                 .addModifiers(Modifier.PUBLIC, Modifier.DEFAULT)
@@ -142,18 +181,35 @@ class InternalRecordBuilderProcessor {
         classBuilder.addMethod(methodSpec);
     }
 
-    private void add1WithMethod(TypeSpec.Builder classBuilder, ClassType component, int index) {
+    private String getUniqueVarName()
+    {
+        return getUniqueVarName("");
+    }
+
+    private String getUniqueVarName(String prefix)
+    {
+        var name = prefix + "r";
+        var alreadyExists = recordComponents.stream()
+            .map(ClassType::name)
+            .anyMatch(n -> n.equals(name));
+        return alreadyExists ? getUniqueVarName(prefix + "_") : name;
+    }
+
+    private void add1WithMethod(TypeSpec.Builder classBuilder, ClassType component, int index)
+    {
         /*
             Adds a with method for the component similar to:
 
             default MyRecord withName(String name) {
-                MyRecord r = internalGetThis();
+                MyRecord r = (MyRecord)(Object)this;
                 return new MyRecord(name, r.age());
             }
          */
-        CodeBlock.Builder codeBlockBuilder = CodeBlock.builder()
-                .add("$T r = $L();\n", recordClassType.typeName(), metaData.withClassGetThisMethodName())
-                .add("return new $T(", recordClassType.typeName());
+        var codeBlockBuilder = CodeBlock.builder();
+        if (recordComponents.size() > 1) {
+            codeBlockBuilder.add("$T $L = $L(this);\n", recordClassType.typeName(), uniqueVarName, metaData.downCastMethodName());
+        }
+        codeBlockBuilder.add("return new $T(", recordClassType.typeName());
         IntStream.range(0, recordComponents.size()).forEach(parameterIndex -> {
             if (parameterIndex > 0) {
                 codeBlockBuilder.add(", ");
@@ -161,15 +217,16 @@ class InternalRecordBuilderProcessor {
             ClassType parameterComponent = recordComponents.get(parameterIndex);
             if (parameterIndex == index) {
                 codeBlockBuilder.add(parameterComponent.name());
-            } else {
-                codeBlockBuilder.add("r.$L()", parameterComponent.name());
+            }
+            else {
+                codeBlockBuilder.add("$L.$L()", uniqueVarName, parameterComponent.name());
             }
         });
         codeBlockBuilder.add(");");
 
-        String methodName = getWithMethodName(component, metaData.withClassMethodPrefix());
+        var methodName = getWithMethodName(component, metaData.withClassMethodPrefix());
         var parameterSpec = ParameterSpec.builder(component.typeName(), component.name()).build();
-        MethodSpec methodSpec = MethodSpec.methodBuilder(methodName)
+        var methodSpec = MethodSpec.methodBuilder(methodName)
                 .addAnnotation(generatedRecordBuilderAnnotation)
                 .addJavadoc("Return a new instance of {@code $L} with a new value for {@code $L}\n", recordClassType.name(), component.name())
                 .addModifiers(Modifier.PUBLIC, Modifier.DEFAULT)
@@ -180,7 +237,8 @@ class InternalRecordBuilderProcessor {
         classBuilder.addMethod(methodSpec);
     }
 
-    private void addDefaultConstructor() {
+    private void addDefaultConstructor()
+    {
         /*
             Adds a default constructor similar to:
 
@@ -194,7 +252,29 @@ class InternalRecordBuilderProcessor {
         builder.addMethod(constructor);
     }
 
-    private void addAllArgsConstructor() {
+    private void addStaticBuilder()
+    {
+        /*
+            Adds an static builder similar to:
+
+            public static MyRecord(int p1, T p2, ...) {
+                return new MyRecord(p1, p2, ...);
+            }
+         */
+        CodeBlock codeBlock = buildCodeBlock();
+        var builder = MethodSpec.methodBuilder(recordClassType.name())
+                .addJavadoc("Static constructor/builder. Can be used instead of new $L(...)\n", recordClassType.name())
+                .addTypeVariables(typeVariables)
+                .addModifiers(Modifier.PUBLIC, Modifier.STATIC)
+                .addAnnotation(generatedRecordBuilderAnnotation)
+                .returns(recordClassType.typeName())
+                .addStatement(codeBlock);
+        recordComponents.forEach(component -> builder.addParameter(component.typeName(), component.name()));
+        this.builder.addMethod(builder.build());
+    }
+
+    private void addAllArgsConstructor()
+    {
         /*
             Adds an all-args constructor similar to:
 
@@ -215,7 +295,8 @@ class InternalRecordBuilderProcessor {
         builder.addMethod(constructorBuilder.build());
     }
 
-    private void addToStringMethod() {
+    private void addToStringMethod()
+    {
         /*
             add a toString() method similar to:
 
@@ -244,7 +325,8 @@ class InternalRecordBuilderProcessor {
         builder.addMethod(methodSpec);
     }
 
-    private void addHashCodeMethod() {
+    private void addHashCodeMethod()
+    {
         /*
             add a hashCode() method similar to:
 
@@ -272,7 +354,8 @@ class InternalRecordBuilderProcessor {
         builder.addMethod(methodSpec);
     }
 
-    private void addEqualsMethod() {
+    private void addEqualsMethod()
+    {
         /*
             add an equals() method similar to:
 
@@ -285,13 +368,14 @@ class InternalRecordBuilderProcessor {
          */
         var codeBuilder = CodeBlock.builder();
         codeBuilder.add("return (this == o) || (");
-        codeBuilder.add("(o instanceof $L b)", builderClassType.name());
+        codeBuilder.add("(o instanceof $L $L)", builderClassType.name(), uniqueVarName);
         recordComponents.forEach(recordComponent -> {
             String name = recordComponent.name();
             if (recordComponent.typeName().isPrimitive()) {
-                codeBuilder.add("\n&& ($L == b.$L)", name, name);
-            } else {
-                codeBuilder.add("\n&& $T.equals($L, b.$L)", Objects.class, name, name);
+                codeBuilder.add("\n&& ($L == $L.$L)", name, uniqueVarName, name);
+            }
+            else {
+                codeBuilder.add("\n&& $T.equals($L, $L.$L)", Objects.class, name, uniqueVarName, name);
             }
         });
         codeBuilder.add(")");
@@ -307,7 +391,8 @@ class InternalRecordBuilderProcessor {
         builder.addMethod(methodSpec);
     }
 
-    private void addBuildMethod() {
+    private void addBuildMethod()
+    {
         /*
             Adds the build method that generates the record similar to:
 
@@ -315,6 +400,22 @@ class InternalRecordBuilderProcessor {
                 return new MyRecord(p1, p2, ...);
             }
          */
+        CodeBlock codeBlock = buildCodeBlock();
+        var methodSpec = MethodSpec.methodBuilder(metaData.buildMethodName())
+                .addJavadoc("Return a new record instance with all fields set to the current values in this builder\n")
+                .addModifiers(Modifier.PUBLIC)
+                .addAnnotation(generatedRecordBuilderAnnotation)
+                .returns(recordClassType.typeName())
+                .addStatement(codeBlock)
+                .build();
+        builder.addMethod(methodSpec);
+    }
+
+    private CodeBlock buildCodeBlock() {
+        /*
+            Builds the code block for allocating the record from its parts
+        */
+
         var codeBuilder = CodeBlock.builder().add("return new $T(", recordClassType.typeName());
         IntStream.range(0, recordComponents.size()).forEach(index -> {
             if (index > 0) {
@@ -323,18 +424,11 @@ class InternalRecordBuilderProcessor {
             codeBuilder.add("$L", recordComponents.get(index).name());
         });
         codeBuilder.add(")");
-
-        var methodSpec = MethodSpec.methodBuilder(metaData.buildMethodName())
-                .addJavadoc("Return a new record instance with all fields set to the current values in this builder\n")
-                .addModifiers(Modifier.PUBLIC)
-                .addAnnotation(generatedRecordBuilderAnnotation)
-                .returns(recordClassType.typeName())
-                .addStatement(codeBuilder.build())
-                .build();
-        builder.addMethod(methodSpec);
+        return codeBuilder.build();
     }
 
-    private void addStaticCopyBuilderMethod() {
+    private void addStaticCopyBuilderMethod()
+    {
         /*
             Adds a copy builder method that pre-fills the builder with existing values similar to:
 
@@ -363,7 +457,8 @@ class InternalRecordBuilderProcessor {
         builder.addMethod(methodSpec);
     }
 
-    private void addStaticDefaultBuilderMethod() {
+    private void addStaticDefaultBuilderMethod()
+    {
         /*
             Adds a the default builder method similar to:
 
@@ -382,7 +477,8 @@ class InternalRecordBuilderProcessor {
         builder.addMethod(methodSpec);
     }
 
-    private void addStaticComponentsMethod() {
+    private void addStaticComponentsMethod()
+    {
         /*
             Adds a static method that converts a record instance into a stream of its component parts
 
@@ -416,7 +512,40 @@ class InternalRecordBuilderProcessor {
         builder.addMethod(methodSpec);
     }
 
-    private void add1Field(ClassType component) {
+    private void addStaticDowncastMethod()
+    {
+        /*
+            Adds a method that downcasts to the record type
+
+            private static MyRecord _downcast(Object this) {
+                return (MyRecord)this;
+            }
+         */
+        var codeBlockBuilder = CodeBlock.builder()
+            .add("try {\n")
+            .indent()
+            .add("return ($T)obj;\n", recordClassType.typeName())
+            .unindent()
+            .add("}\n")
+            .add("catch (ClassCastException dummy) {\n")
+            .indent()
+            .add("throw new RuntimeException($S);\n", builderClassType.name() + "." + metaData.withClassName() + " can only be implemented for " + recordClassType.name())
+            .unindent()
+            .add("}");
+        var methodSpec = MethodSpec.methodBuilder(metaData.downCastMethodName())
+            .addAnnotation(generatedRecordBuilderAnnotation)
+            .addJavadoc("Downcast to {@code $L}\n", recordClassType.name())
+            .addModifiers(Modifier.PRIVATE, Modifier.STATIC)
+            .addParameter(Object.class, "obj")
+            .addTypeVariables(typeVariables)
+            .returns(recordClassType.typeName())
+            .addCode(codeBlockBuilder.build())
+            .build();
+        builder.addMethod(methodSpec);
+    }
+
+    private void add1Field(ClassType component)
+    {
         /*
             For a single record component, add a field similar to:
 
@@ -426,7 +555,8 @@ class InternalRecordBuilderProcessor {
         builder.addField(fieldSpec);
     }
 
-    private void add1GetterMethod(ClassType component) {
+    private void add1GetterMethod(ClassType component)
+    {
         /*
             For a single record component, add a getter similar to:
 
@@ -444,7 +574,8 @@ class InternalRecordBuilderProcessor {
         builder.addMethod(methodSpec);
     }
 
-    private void add1SetterMethod(ClassType component) {
+    private void add1SetterMethod(ClassType component)
+    {
         /*
             For a single record component, add a setter similar to:
 

record-builder-processor/src/main/java/io/soabase/recordbuilder/processor/InternalRecordInterfaceProcessor.java

@@ -15,12 +15,14 @@
  */
 package io.soabase.recordbuilder.processor;
 
-import com.squareup.javapoet.*;
+import com.squareup.javapoet.ClassName;
+import com.squareup.javapoet.MethodSpec;
+import com.squareup.javapoet.ParameterSpec;
+import com.squareup.javapoet.TypeSpec;
+import com.squareup.javapoet.TypeVariableName;
+import io.soabase.recordbuilder.core.IgnoreDefaultMethod;
 import io.soabase.recordbuilder.core.RecordBuilder;
 import io.soabase.recordbuilder.core.RecordBuilderMetaData;
-import io.soabase.recordbuilder.core.RecordInterface;
-import io.soabase.recordbuilder.core.IgnoreDefaultMethod;
-
 import javax.annotation.processing.ProcessingEnvironment;
 import javax.lang.model.element.ElementKind;
 import javax.lang.model.element.ExecutableElement;
@@ -28,7 +30,13 @@ import javax.lang.model.element.Modifier;
 import javax.lang.model.element.TypeElement;
 import javax.lang.model.type.TypeKind;
 import javax.tools.Diagnostic;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Optional;
+import java.util.Set;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
@@ -46,9 +54,9 @@ class InternalRecordInterfaceProcessor {
 
     private static final String FAKE_METHOD_NAME = "__FAKE__";
 
-    InternalRecordInterfaceProcessor(ProcessingEnvironment processingEnv, TypeElement iface, RecordInterface recordInterface, RecordBuilderMetaData metaData) {
+    InternalRecordInterfaceProcessor(ProcessingEnvironment processingEnv, TypeElement iface, boolean addRecordBuilder, RecordBuilderMetaData metaData, Optional<String> packageNameOpt) {
         this.processingEnv = processingEnv;
-        packageName = ElementUtils.getPackageName(iface);
+        packageName = packageNameOpt.orElseGet(() -> ElementUtils.getPackageName(iface));
         recordComponents = getRecordComponents(iface);
         this.iface = iface;
 
@@ -65,8 +73,10 @@ class InternalRecordInterfaceProcessor {
                 .addAnnotation(generatedRecordInterfaceAnnotation)
                 .addTypeVariables(typeVariables);
 
-        if (recordInterface.addRecordBuilder()) {
+        if (addRecordBuilder) {
+            ClassType builderClassType = ElementUtils.getClassType(packageName, getBuilderName(iface, metaData, recordClassType, metaData.suffix()) + "." + metaData.withClassName(), iface.getTypeParameters());
             builder.addAnnotation(RecordBuilder.class);
+            builder.addSuperinterface(builderClassType.typeName());
         }
 
         recordType = builder.build();

record-builder-processor/src/main/java/io/soabase/recordbuilder/processor/OptionBasedRecordBuilderMetaData.java

@@ -45,6 +45,11 @@ public class OptionBasedRecordBuilderMetaData implements RecordBuilderMetaData {
      */
     public static final String OPTION_BUILD_METHOD_NAME = "buildMethodName";
 
+    /**
+     * @see #downCastMethodName()
+     */
+    public static final String OPTION_DOWN_CAST_METHOD_NAME = "downCastMethodName";
+
     /**
      * @see #componentsMethodName()
      */
@@ -75,20 +80,15 @@ public class OptionBasedRecordBuilderMetaData implements RecordBuilderMetaData {
      */
     public static final String OPTION_WITH_CLASS_METHOD_PREFIX = "withClassMethodPrefix";
 
-    /**
-     * @see #withClassGetThisMethodName()
-     */
-    public static final String OPTION_WITH_CLASS_GET_THIS_METHOD_NAME = "withClassGetThisMethodName";
-
     private final String suffix;
     private final String interfaceSuffix;
     private final String copyMethodName;
     private final String builderMethodName;
     private final String buildMethodName;
+    private final String downCastMethodName;
     private final String componentsMethodName;
     private final String withClassName;
     private final String withClassMethodPrefix;
-    private final String withClassGetThisMethodName;
     private final String fileComment;
     private final String fileIndent;
     private final boolean prefixEnclosingClassNames;
@@ -99,10 +99,10 @@ public class OptionBasedRecordBuilderMetaData implements RecordBuilderMetaData {
         builderMethodName = options.getOrDefault(OPTION_BUILDER_METHOD_NAME, DEFAULT.builderMethodName());
         copyMethodName = options.getOrDefault(OPTION_COPY_METHOD_NAME, DEFAULT.copyMethodName());
         buildMethodName = options.getOrDefault(OPTION_BUILD_METHOD_NAME, DEFAULT.buildMethodName());
+        downCastMethodName = options.getOrDefault(OPTION_DOWN_CAST_METHOD_NAME, DEFAULT.downCastMethodName());
         componentsMethodName = options.getOrDefault(OPTION_COMPONENTS_METHOD_NAME, DEFAULT.componentsMethodName());
         withClassName = options.getOrDefault(OPTION_WITH_CLASS_NAME, DEFAULT.withClassName());
         withClassMethodPrefix = options.getOrDefault(OPTION_WITH_CLASS_METHOD_PREFIX, DEFAULT.withClassMethodPrefix());
-        withClassGetThisMethodName = options.getOrDefault(OPTION_WITH_CLASS_GET_THIS_METHOD_NAME, DEFAULT.withClassGetThisMethodName());
         fileComment = options.getOrDefault(OPTION_FILE_COMMENT, DEFAULT.fileComment());
         fileIndent = options.getOrDefault(OPTION_FILE_INDENT, DEFAULT.fileIndent());
         String prefixenclosingclassnamesopt = options.getOrDefault(OPTION_PREFIX_ENCLOSING_CLASS_NAMES, String.valueOf(DEFAULT.prefixEnclosingClassNames()));
@@ -133,6 +133,11 @@ public class OptionBasedRecordBuilderMetaData implements RecordBuilderMetaData {
         return buildMethodName;
     }
 
+    @Override
+    public String downCastMethodName() {
+        return downCastMethodName;
+    }
+
     @Override
     public String componentsMethodName() {
         return componentsMethodName;
@@ -148,11 +153,6 @@ public class OptionBasedRecordBuilderMetaData implements RecordBuilderMetaData {
         return withClassMethodPrefix;
     }
 
-    @Override
-    public String withClassGetThisMethodName() {
-        return withClassGetThisMethodName;
-    }
-
     @Override
     public String fileComment() {
         return fileComment;

record-builder-processor/src/main/java/io/soabase/recordbuilder/processor/RecordBuilderProcessor.java

@@ -18,39 +18,46 @@ package io.soabase.recordbuilder.processor;
 import com.squareup.javapoet.AnnotationSpec;
 import com.squareup.javapoet.JavaFile;
 import com.squareup.javapoet.TypeSpec;
+import io.soabase.recordbuilder.core.RecordBuilder;
 import io.soabase.recordbuilder.core.RecordBuilderMetaData;
 import io.soabase.recordbuilder.core.RecordInterface;
-
-import javax.annotation.processing.*;
+import javax.annotation.processing.AbstractProcessor;
+import javax.annotation.processing.Filer;
+import javax.annotation.processing.Generated;
+import javax.annotation.processing.RoundEnvironment;
 import javax.lang.model.SourceVersion;
 import javax.lang.model.element.Element;
+import javax.lang.model.element.PackageElement;
 import javax.lang.model.element.TypeElement;
+import javax.lang.model.type.TypeMirror;
 import javax.tools.Diagnostic;
 import javax.tools.JavaFileObject;
 import java.io.IOException;
 import java.io.Writer;
+import java.util.Optional;
 import java.util.Set;
 import java.util.function.Function;
 
-import static io.soabase.recordbuilder.processor.RecordBuilderProcessor.RECORD_BUILDER;
-import static io.soabase.recordbuilder.processor.RecordBuilderProcessor.RECORD_INTERFACE;
-
-@SupportedAnnotationTypes({RECORD_BUILDER, RECORD_INTERFACE})
 public class RecordBuilderProcessor extends AbstractProcessor {
-    public static final String RECORD_BUILDER = "io.soabase.recordbuilder.core.RecordBuilder";
-    public static final String RECORD_INTERFACE = "io.soabase.recordbuilder.core.RecordInterface";
+    private static final String RECORD_BUILDER = RecordBuilder.class.getName();
+    private static final String RECORD_BUILDER_INCLUDE = RecordBuilder.Include.class.getName().replace('$', '.');
+    private static final String RECORD_INTERFACE = RecordInterface.class.getName();
+    private static final String RECORD_INTERFACE_INCLUDE = RecordInterface.Include.class.getName().replace('$', '.');
 
-    static final AnnotationSpec generatedRecordBuilderAnnotation = AnnotationSpec.builder(Generated.class).addMember("value", "$S", RECORD_BUILDER).build();
-    static final AnnotationSpec generatedRecordInterfaceAnnotation = AnnotationSpec.builder(Generated.class).addMember("value", "$S", RECORD_INTERFACE).build();
+    static final AnnotationSpec generatedRecordBuilderAnnotation = AnnotationSpec.builder(Generated.class).addMember("value", "$S", RecordBuilder.class.getName()).build();
+    static final AnnotationSpec generatedRecordInterfaceAnnotation = AnnotationSpec.builder(Generated.class).addMember("value", "$S", RecordInterface.class.getName()).build();
 
     @Override
     public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
-        annotations.forEach(annotation -> roundEnv.getElementsAnnotatedWith(annotation)
-                .forEach(element -> process(annotation, element))
-        );
+        annotations.forEach(annotation -> roundEnv.getElementsAnnotatedWith(annotation).forEach(element -> process(annotation, element)));
         return true;
     }
-    
+
+    @Override
+    public Set<String> getSupportedAnnotationTypes() {
+        return Set.of(RECORD_BUILDER, RECORD_BUILDER_INCLUDE, RECORD_INTERFACE, RECORD_INTERFACE_INCLUDE);
+    }
+
     @Override
     public SourceVersion getSupportedSourceVersion() {
         // we don't directly return RELEASE_14 as that may 
@@ -63,37 +70,120 @@ public class RecordBuilderProcessor extends AbstractProcessor {
     private void process(TypeElement annotation, Element element) {
         var metaData = new RecordBuilderMetaDataLoader(processingEnv, s -> processingEnv.getMessager().printMessage(Diagnostic.Kind.NOTE, s)).getMetaData();
 
-        if (annotation.getQualifiedName().toString().equals(RECORD_BUILDER)) {
-            processRecordBuilder((TypeElement) element, metaData);
-        } else if (annotation.getQualifiedName().toString().equals(RECORD_INTERFACE)) {
-            processRecordInterface((TypeElement) element, element.getAnnotation(RecordInterface.class), metaData);
-        } else {
+        String annotationClass = annotation.getQualifiedName().toString();
+        if ( annotationClass.equals(RECORD_BUILDER) )
+        {
+            processRecordBuilder((TypeElement)element, metaData, Optional.empty());
+        }
+        else if ( annotationClass.equals(RECORD_INTERFACE) )
+        {
+            processRecordInterface((TypeElement)element, element.getAnnotation(RecordInterface.class).addRecordBuilder(), metaData, Optional.empty());
+        }
+        else if ( annotationClass.equals(RECORD_BUILDER_INCLUDE) || annotationClass.equals(RECORD_INTERFACE_INCLUDE) )
+        {
+            processIncludes(element, metaData, annotationClass);
+        }
+        else
+        {
             throw new RuntimeException("Unknown annotation: " + annotation);
         }
     }
 
-    private void processRecordInterface(TypeElement element, RecordInterface recordInterface, RecordBuilderMetaData metaData) {
-        if (!element.getKind().isInterface()) {
+    private void processIncludes(Element element, RecordBuilderMetaData metaData, String annotationClass) {
+        var annotationMirrorOpt = ElementUtils.findAnnotationMirror(processingEnv, element, annotationClass);
+        if ( annotationMirrorOpt.isEmpty() )
+        {
+            processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Could not get annotation mirror for: " + annotationClass, element);
+        }
+        else
+        {
+            var values = processingEnv.getElementUtils().getElementValuesWithDefaults(annotationMirrorOpt.get());
+            var classes = ElementUtils.getAnnotationValue(values, "value");
+            if ( classes.isEmpty() )
+            {
+                processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Could not get annotation value for: " + annotationClass, element);
+            }
+            else
+            {
+                var packagePattern = ElementUtils.getStringAttribute(ElementUtils.getAnnotationValue(values, "packagePattern").orElse(null), "*");
+                var classesMirrors = ElementUtils.getClassesAttribute(classes.get());
+                for ( TypeMirror mirror : classesMirrors )
+                {
+                    TypeElement typeElement = (TypeElement)processingEnv.getTypeUtils().asElement(mirror);
+                    if ( typeElement == null )
+                    {
+                        processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Could not get element for: " + mirror, element);
+                    }
+                    else
+                    {
+                        var packageName = buildPackageName(packagePattern, element, typeElement);
+                        if (packageName != null)
+                        {
+                            if ( annotationClass.equals(RECORD_INTERFACE_INCLUDE) )
+                            {
+                                var addRecordBuilderOpt = ElementUtils.getAnnotationValue(values, "addRecordBuilder");
+                                var addRecordBuilder = addRecordBuilderOpt.map(ElementUtils::getBooleanAttribute).orElse(true);
+                                processRecordInterface(typeElement, addRecordBuilder, metaData, Optional.of(packageName));
+                            }
+                            else
+                            {
+                                processRecordBuilder(typeElement, metaData, Optional.of(packageName));
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private String buildPackageName(String packagePattern, Element builderElement, TypeElement includedClass) {
+        PackageElement includedClassPackage = findPackageElement(includedClass, includedClass);
+        if (includedClassPackage == null) {
+            return null;
+        }
+        String replaced = packagePattern.replace("*", includedClassPackage.getQualifiedName().toString());
+        if (builderElement instanceof PackageElement) {
+            return replaced.replace("@", ((PackageElement)builderElement).getQualifiedName().toString());
+        }
+        return replaced.replace("@", ((PackageElement)builderElement.getEnclosingElement()).getQualifiedName().toString());
+    }
+
+    private PackageElement findPackageElement(Element actualElement, Element includedClass) {
+        if (includedClass == null) {
+            processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "Element has not package", actualElement);
+            return null;
+        }
+        if (includedClass.getEnclosingElement() instanceof PackageElement) {
+            return (PackageElement)includedClass.getEnclosingElement();
+        }
+        return findPackageElement(actualElement, includedClass.getEnclosingElement());
+    }
+
+    private void processRecordInterface(TypeElement element, boolean addRecordBuilder, RecordBuilderMetaData metaData, Optional<String> packageName) {
+        if ( !element.getKind().isInterface() )
+        {
             processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "RecordInterface only valid for interfaces.", element);
             return;
         }
-        var internalProcessor = new InternalRecordInterfaceProcessor(processingEnv, element, recordInterface, metaData);
-        if (!internalProcessor.isValid()) {
+        var internalProcessor = new InternalRecordInterfaceProcessor(processingEnv, element, addRecordBuilder, metaData, packageName);
+        if ( !internalProcessor.isValid() )
+        {
             return;
         }
         writeRecordInterfaceJavaFile(element, internalProcessor.packageName(), internalProcessor.recordClassType(), internalProcessor.recordType(), metaData, internalProcessor::toRecord);
     }
 
-    private void processRecordBuilder(TypeElement record, RecordBuilderMetaData metaData) {
+    private void processRecordBuilder(TypeElement record, RecordBuilderMetaData metaData, Optional<String> packageName) {
         // we use string based name comparison for the element kind,
         // as the ElementKind.RECORD enum doesn't exist on JRE releases
         // older than Java 14, and we don't want to throw unexpected
         // NoSuchFieldErrors
-        if (!"RECORD".equals(record.getKind().name())) {
+        if ( !"RECORD".equals(record.getKind().name()) )
+        {
             processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, "RecordBuilder only valid for records.", record);
             return;
         }
-        var internalProcessor = new InternalRecordBuilderProcessor(record, metaData);
+        var internalProcessor = new InternalRecordBuilderProcessor(record, metaData, packageName);
         writeRecordBuilderJavaFile(record, internalProcessor.packageName(), internalProcessor.builderClassType(), internalProcessor.builderType(), metaData);
     }
 
@@ -105,7 +195,7 @@ public class RecordBuilderProcessor extends AbstractProcessor {
         {
             String fullyQualifiedName = packageName.isEmpty() ? builderClassType.name() : (packageName + "." + builderClassType.name());
             JavaFileObject sourceFile = filer.createSourceFile(fullyQualifiedName);
-            try ( Writer writer = sourceFile.openWriter() )
+            try (Writer writer = sourceFile.openWriter())
             {
                 javaFile.writeTo(writer);
             }
@@ -128,7 +218,7 @@ public class RecordBuilderProcessor extends AbstractProcessor {
         {
             String fullyQualifiedName = packageName.isEmpty() ? classType.name() : (packageName + "." + classType.name());
             JavaFileObject sourceFile = filer.createSourceFile(fullyQualifiedName);
-            try ( Writer writer = sourceFile.openWriter() )
+            try (Writer writer = sourceFile.openWriter())
             {
                 writer.write(recordSourceCode);
             }
@@ -140,11 +230,10 @@ public class RecordBuilderProcessor extends AbstractProcessor {
     }
 
     private JavaFile javaFileBuilder(String packageName, TypeSpec type, RecordBuilderMetaData metaData) {
-        var javaFileBuilder = JavaFile.builder(packageName, type)
-                .skipJavaLangImports(true)
-                .indent(metaData.fileIndent());
+        var javaFileBuilder = JavaFile.builder(packageName, type).skipJavaLangImports(true).indent(metaData.fileIndent());
         var comment = metaData.fileComment();
-        if ((comment != null) && !comment.isEmpty()) {
+        if ( (comment != null) && !comment.isEmpty() )
+        {
             javaFileBuilder.addFileComment(comment);
         }
         return javaFileBuilder.build();
@@ -152,7 +241,8 @@ public class RecordBuilderProcessor extends AbstractProcessor {
 
     private void handleWriteError(TypeElement element, IOException e) {
         String message = "Could not create source file";
-        if (e.getMessage() != null) {
+        if ( e.getMessage() != null )
+        {
             message = message + ": " + e.getMessage();
         }
         processingEnv.getMessager().printMessage(Diagnostic.Kind.ERROR, message, element);

record-builder-processor/src/main/java/module-info.java

@@ -0,0 +1,23 @@
+/**
+ * Copyright 2019 Jordan Zimmerman
+ *
+ * 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.
+ */
+module io.soabase.record.builder.processor {
+    requires com.squareup.javapoet;
+    requires io.soabase.record.builder.core;
+    requires java.compiler;
+
+    exports io.soabase.recordbuilder.processor;
+    opens io.soabase.recordbuilder.processor;
+}

record-builder-test/pom.xml

@@ -3,7 +3,7 @@
     <parent>
         <groupId>io.soabase.record-builder</groupId>
         <artifactId>record-builder</artifactId>
-        <version>1.8.ea</version>
+        <version>1.14.ea</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

record-builder-test/src/main/java/io/soabase/recordbuilder/test/Builder.java

@@ -0,0 +1,28 @@
+/**
+ * Copyright 2019 Jordan Zimmerman
+ *
+ * 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 io.soabase.recordbuilder.test;
+
+import io.soabase.recordbuilder.core.RecordBuilder;
+import io.soabase.recordbuilder.core.RecordInterface;
+
+@RecordInterface.Include({
+    Thingy.class
+})
+@RecordBuilder.Include({
+    Nested.NestedRecord.class
+})
+public class Builder {
+}

record-builder-test/src/main/java/io/soabase/recordbuilder/test/Customer.java

@@ -0,0 +1,26 @@
+/**
+ * Copyright 2019 Jordan Zimmerman
+ *
+ * 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 io.soabase.recordbuilder.test;
+
+import java.time.Instant;
+
+public interface Customer {
+    String name();
+
+    String address();
+
+    Instant activeDate();
+}

record-builder-test/src/main/java/io/soabase/recordbuilder/test/Empty.java

@@ -0,0 +1,22 @@
+/**
+ * Copyright 2019 Jordan Zimmerman
+ *
+ * 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 io.soabase.recordbuilder.test;
+
+import io.soabase.recordbuilder.core.RecordBuilder;
+
+@RecordBuilder
+public record Empty() implements EmptyBuilder.With {
+}

record-builder-test/src/main/java/io/soabase/recordbuilder/test/Nested.java

@@ -0,0 +1,20 @@
+/**
+ * Copyright 2019 Jordan Zimmerman
+ *
+ * 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 io.soabase.recordbuilder.test;
+
+public class Nested {
+    record NestedRecord(int x, int y){}
+}

record-builder-test/src/main/java/io/soabase/recordbuilder/test/Pair.java

@@ -0,0 +1,18 @@
+/**
+ * Copyright 2019 Jordan Zimmerman
+ *
+ * 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 io.soabase.recordbuilder.test;
+
+public record Pair<T, U>(T t, U u) {}

record-builder-test/src/main/java/io/soabase/recordbuilder/test/Point.java

@@ -0,0 +1,18 @@
+/**
+ * Copyright 2019 Jordan Zimmerman
+ *
+ * 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 io.soabase.recordbuilder.test;
+
+public record Point(int x, int y) {}

record-builder-test/src/main/java/io/soabase/recordbuilder/test/RecordWithAnR.java

@@ -0,0 +1,21 @@
+/**
+ * Copyright 2019 Jordan Zimmerman
+ *
+ * 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 io.soabase.recordbuilder.test;
+
+import io.soabase.recordbuilder.core.RecordBuilder;
+
+@RecordBuilder
+public record RecordWithAnR(int r, String b) {}

record-builder-test/src/main/java/io/soabase/recordbuilder/test/Thingy.java

@@ -0,0 +1,20 @@
+/**
+ * Copyright 2019 Jordan Zimmerman
+ *
+ * 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 io.soabase.recordbuilder.test;
+
+public interface Thingy<T> {
+    T getIt();
+}

record-builder-test/src/main/java/io/soabase/recordbuilder/test/package-info.java

@@ -0,0 +1,22 @@
+/**
+ * Copyright 2019 Jordan Zimmerman
+ *
+ * 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.
+ */
+
+@RecordBuilder.Include(value = {Point.class, Pair.class}, packagePattern = "*.foo")
+@RecordInterface.Include(value = Customer.class, addRecordBuilder = false, packagePattern = "*.bar")
+package io.soabase.recordbuilder.test;
+
+import io.soabase.recordbuilder.core.RecordBuilder;
+import io.soabase.recordbuilder.core.RecordInterface;

record-builder-test/src/test/java/io/soabase/recordbuilder/test/TestRecordInterface.java

@@ -0,0 +1,51 @@
+/**
+ * Copyright 2019 Jordan Zimmerman
+ *
+ * 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 io.soabase.recordbuilder.test;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.time.Instant;
+
+import static io.soabase.recordbuilder.test.SimpleGenericRecordBuilder.SimpleGenericRecord;
+import static io.soabase.recordbuilder.test.SimpleRecordBuilder.SimpleRecord;
+
+public class TestRecordInterface
+{
+    @Test
+    public void testHasDefaults()
+    {
+        var r1 = new HasDefaultsRecord(Instant.MIN, Instant.MAX);
+        var r2 = r1.with(b -> b.tomorrow(Instant.MIN));
+        Assertions.assertEquals(Instant.MIN, r1.time());
+        Assertions.assertEquals(Instant.MAX, r1.tomorrow());
+        Assertions.assertEquals(Instant.MIN, r2.time());
+        Assertions.assertEquals(Instant.MIN, r2.tomorrow());
+    }
+
+    @Test
+    public void testStaticConstructor()
+    {
+        var simple = SimpleRecord(10,"hey");
+        Assertions.assertEquals(simple.i(), 10);
+        Assertions.assertEquals(simple.s(), "hey");
+
+        var now = Instant.now();
+        var generic = SimpleGenericRecord(101, now);
+        Assertions.assertEquals(generic.i(), 101);
+        Assertions.assertEquals(generic.s(), now);
+    }
+}

record-builder-test/src/test/java/io/soabase/recordbuilder/test/TestWithers.java

@@ -46,4 +46,24 @@ class TestWithers {
         Assertions.assertEquals(20, r3.i());
         Assertions.assertEquals("changed", r3.s());
     }
+
+    @Test
+    void testWitherBuilderConsumer() {
+        var r1 = new SimpleGenericRecord<>(10, "ten");
+        var r2 = r1.with(r -> r.i(15));
+        var r3 = r1.with(r -> r.s("twenty").i(20));
+        Assertions.assertEquals(10, r1.i());
+        Assertions.assertEquals("ten", r1.s());
+        Assertions.assertEquals(15, r2.i());
+        Assertions.assertEquals("ten", r2.s());
+        Assertions.assertEquals(20, r3.i());
+        Assertions.assertEquals("twenty", r3.s());
+    }
+
+    private static class BadSubclass implements PersonRecordBuilder.With {}
+
+    @Test
+    void testBadWithSubclass() {
+        Assertions.assertThrows(RuntimeException.class, () -> new BadSubclass().withAge(10));
+    }
 }