[maven-release-plugin] prepare release record-builder-1.18-java15

Since most users only need the annotations.

.github/FUNDING.yml

@@ -0,0 +1,3 @@
+# These are supported funding model platforms
+
+github: Randgalt

.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: Maven Build - Java 16
+
+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: 16.0.0-ea
+    - name: Build with Maven
+      run: mvn -B package --file pom.xml

.github/workflows/maven_java15.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: Maven Build - Java 15
+
+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 -P java15 -B package --file pom.xml

.mvn/jvm.config

@@ -1 +0,0 @@
---enable-preview

.travis.yml

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

README.md

@@ -1,13 +1,13 @@
-[![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
+# RecordBuilder
 
 ## What is RecordBuilder
 
-Java 15 introduced [Records](https://cr.openjdk.java.net/~briangoetz/amber/datum.html) as a preview feature. Since Java 9, 
-features in Java are being released in stages. While the Java 15 version of records is fantastic, it's currently missing important features 
-for data classes: a builder and "with"ers. This project is an annotation processor that creates:
+Java 16 introduces [Records](https://openjdk.java.net/jeps/395). While this version of records is fantastic, 
+it's currently missing some important features normally found in data classes: a builder 
+and "with"ers. This project is an annotation processor that creates:
  
 - a companion builder class for Java records
 - an interface that adds "with" copy methods
@@ -19,6 +19,10 @@ _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)
+- [Java 15 Versions](#java-15-versions)
 
 ## RecordBuilder Example
 
@@ -31,16 +35,21 @@ 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
@@ -53,15 +62,15 @@ 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();
+NameAndAge r4 = r3.with().age(101).name("baz").build();
 
 // alternate method of accessing the builder (note: no need to call "build()")
-var r5 = r4.with(b -> b.age(200).name("whatever"));
+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._
@@ -84,6 +93,13 @@ 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
      */
@@ -160,6 +176,18 @@ 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}
      */
@@ -168,7 +196,7 @@ public class NameAndAgeBuilder {
          * Return a new record builder using the current values
          */
         default NameAndAgeBuilder with() {
-            var r = (NameAndAge)(Object)this;
+            NameAndAge r = _downcast(this);
             return NameAndAgeBuilder.builder(r);
         }
 
@@ -176,8 +204,7 @@ public class NameAndAgeBuilder {
          * Return a new record built from the builder passed to the given consumer
          */
         default NameAndAge with(Consumer<NameAndAgeBuilder> consumer) {
-            var r = (NameAndAge)(Object)this;
-            NameAndAgeBuilder builder = NameAndAgeBuilder.builder(r);
+            NameAndAgeBuilder builder = with();
             consumer.accept(builder);
             return builder.build();
         }
@@ -186,7 +213,7 @@ public class NameAndAgeBuilder {
          * Return a new instance of {@code NameAndAge} with a new value for {@code name}
          */
         default NameAndAge withName(String name) {
-            var r = (NameAndAge)(Object)this;
+            NameAndAge r = _downcast(this);
             return new NameAndAge(name, r.age());
         }
 
@@ -194,7 +221,7 @@ public class NameAndAgeBuilder {
          * Return a new instance of {@code NameAndAge} with a new value for {@code age}
          */
         default NameAndAge withAge(int age) {
-            var r = (NameAndAge)(Object)this;
+            NameAndAge r = _downcast(this);
             return new NameAndAge(r.name(), age);
         }
     }
@@ -230,6 +257,8 @@ Notes:
   - ...cannot have type parameters
 - 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)`
+- If your interface is a JavaBean (e.g. `getThing()`, `isThing()`) the "get" and "is" prefixes are
+stripped and forwarding methods are added.
 
 ## Generation Via Includes
 
@@ -260,18 +289,19 @@ annotation. Use `packagePattern` to change this (see Javadoc for details).
 
 ### Maven
 
-1\. Add the dependency that contains the `@RecordBuilder` annotation.
+1) Add the dependency that contains the `@RecordBuilder` annotation.
 
 ```
 <dependency>
     <groupId>io.soabase.record-builder</groupId>
     <artifactId>record-builder-core</artifactId>
     <version>set-version-here</version>
+    <scope>provided</scope>
 </dependency>
 
 ```
 
-2\. Enable the annotation processing for the Maven Compiler Plugin:
+2) Enable the annotation processing for the Maven Compiler Plugin:
 
 ```
 <plugin>
@@ -291,21 +321,11 @@ annotation. Use `packagePattern` to change this (see Javadoc for details).
         </annotationProcessors>
 
         
-        <!-- "release" and "enable-preview" are required while records are preview features -->
-        <release>15</release>
-        <compilerArgs>
-            <arg>--enable-preview</arg>
-        </compilerArgs>
-
         ... any other options here ...
     </configuration>
 </plugin>
 ```
 
-3\. Enable Preview for Maven
-
-Create a file in your project's root named `.mvn/jvm.config`. The file should have 1 line with the value: `--enable-preview`. (see: https://stackoverflow.com/questions/58023240)
-
 ### Gradle
 
 Add the following to your build.gradle file:
@@ -313,16 +333,7 @@ Add the following to your build.gradle file:
 ```
 dependencies {
     annotationProcessor 'io.soabase.record-builder:record-builder-processor:$version-goes-here'
-    implementation 'io.soabase.record-builder:record-builder-core:$version-goes-here'
-}
-
-tasks.withType(JavaCompile) {
-    options.fork = true
-    options.forkOptions.jvmArgs += '--enable-preview'
-    options.compilerArgs += '--enable-preview'
-}
-tasks.withType(Test) {
-    jvmArgs += "--enable-preview"
+    compileOnly 'io.soabase.record-builder:record-builder-core:$version-goes-here'
 }
 ```
 
@@ -330,16 +341,6 @@ tasks.withType(Test) {
 
 Depending on your IDE you are likely to need to enable Annotation Processing in your IDE settings.
 
-## Enable Preview
-
-Note: records are a preview feature only. You'll need take a number of steps in order to try RecordBuilder:
-
-- Install and make active Java 15 or later
-- Make sure your development tool is using Java 15 or later and is configured to enable preview features (for Maven I've documented how to do this here: [https://stackoverflow.com/a/59363152/2048051](https://stackoverflow.com/a/59363152/2048051))
-- Bear in mind that this is not yet meant for production and there are numerous bugs in the tools and JDKs.
-
-Note: I've seen some very odd compilation bugs with the current Java 15 and Maven. If you get internal Javac errors I suggest rebuilding with `mvn clean package` and/or `mvn clean install`.
-
 ## Customizing
 
 The names of the generated methods, etc. are determined by [RecordBuilderMetaData](https://github.com/Randgalt/record-builder/blob/master/record-builder-core/src/main/java/io/soabase/recordbuilder/core/RecordBuilderMetaData.java). If you want to use your own meta data instance:
@@ -361,3 +362,79 @@ Alternatively, you can provide values for each individual meta data (or combinat
 - `javac ... -AfileComment=foo`
 - `javac ... -AfileIndent=foo`
 - `javac ... -AprefixEnclosingClassNames=foo`
+
+## Java 15 Versions
+
+Artifacts compiled wth Java 15 are available. The artifact IDs for these are:
+
+- core: `record-builder-core-java15`
+- processor: `record-builder-processor-java15`
+
+Note: records are a preview feature only in Java 15. You'll need take a number of steps in order to try RecordBuilder:
+
+- Install and make active Java 15 or later
+- Make sure your development tool is using Java 15 or later and is configured to enable preview features (for Maven I've documented how to do this here: [https://stackoverflow.com/a/59363152/2048051](https://stackoverflow.com/a/59363152/2048051))
+- Bear in mind that this is not yet meant for production and there are numerous bugs in the tools and JDKs.
+
+Note: I've seen some very odd compilation bugs with the current Java 15 and Maven. If you get internal Javac errors I suggest rebuilding with `mvn clean package` and/or `mvn clean install`.
+
+You will need to enable preview in your build tools:
+
+### Maven
+
+```
+<dependencies>
+    <dependency>
+        <groupId>io.soabase.record-builder</groupId>
+        <artifactId>record-builder-core-java15</artifactId>
+        <version>set-version-here</version>
+    </dependency>
+</dependencies>
+
+<plugin>
+    <groupId>org.apache.maven.plugins</groupId>
+    <artifactId>maven-compiler-plugin</artifactId>
+    <version>set-version-here</version>
+    <configuration>
+        <annotationProcessorPaths>
+            <annotationProcessorPath>
+                <groupId>io.soabase.record-builder</groupId>
+                <artifactId>record-builder-processor-java15</artifactId>
+                <version>set-version-here</version>
+            </annotationProcessorPath>
+        </annotationProcessorPaths>
+        <annotationProcessors>
+            <annotationProcessor>io.soabase.recordbuilder.processor.RecordBuilderProcessor</annotationProcessor>
+        </annotationProcessors>
+
+        
+        <!-- "release" and "enable-preview" are required while records are preview features -->
+        <release>15</release>
+        <compilerArgs>
+            <arg>--enable-preview</arg>
+        </compilerArgs>
+
+        ... any other options here ...
+    </configuration>
+</plugin>
+```
+
+Create a file in your project's root named `.mvn/jvm.config`. The file should have 1 line with the value: `--enable-preview`. (see: https://stackoverflow.com/questions/58023240)
+
+### Gradle
+
+```
+dependencies {
+    annotationProcessor 'io.soabase.record-builder:record-builder-processor-java15:$version-goes-here'
+    compileOnly 'io.soabase.record-builder:record-builder-core-java15:$version-goes-here'
+}
+
+tasks.withType(JavaCompile) {
+    options.fork = true
+    options.forkOptions.jvmArgs += '--enable-preview'
+    options.compilerArgs += '--enable-preview'
+}
+tasks.withType(Test) {
+    jvmArgs += "--enable-preview"
+}
+```

java15.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+#
+# 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.
+#
+
+
+jenv local 15
+javahome
+mkdir -p .mvn/
+echo "--enable-preview" > .mvn/jvm.config

java16.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+#
+# 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.
+#
+
+
+jenv local 16-ea
+javahome
+rm -fr .mvn

pom.xml

@@ -5,7 +5,7 @@
     <groupId>io.soabase.record-builder</groupId>
     <artifactId>record-builder</artifactId>
     <packaging>pom</packaging>
-    <version>1.11.ea</version>
+    <version>1.18-java15</version>
 
     <modules>
         <module>record-builder-core</module>
@@ -18,7 +18,9 @@
         <project.build.resourceEncoding>UTF-8</project.build.resourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
-        <jdk-version>15</jdk-version>
+        <enable-preview />
+
+        <jdk-version>16</jdk-version>
 
         <maven-compiler-plugin-version>3.8.1</maven-compiler-plugin-version>
         <maven-source-plugin-version>3.2.0</maven-source-plugin-version>
@@ -71,7 +73,7 @@
         <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-1.11.ea</tag>
+        <tag>record-builder-1.18-java15</tag>
     </scm>
 
     <issueManagement>
@@ -124,7 +126,7 @@
                     <configuration>
                         <release>${jdk-version}</release>
                         <compilerArgs>
-                            <arg>--enable-preview</arg>
+                            <arg>${enable-preview}</arg>
                         </compilerArgs>
                     </configuration>
                 </plugin>
@@ -278,7 +280,7 @@
                     <artifactId>maven-surefire-plugin</artifactId>
                     <version>${maven-surefire-plugin-version}</version>
                     <configuration>
-                        <argLine>--enable-preview</argLine>
+                        <argLine>${enable-preview}</argLine>
                     </configuration>
                 </plugin>
             </plugins>
@@ -342,5 +344,13 @@
                 </plugins>
             </build>
         </profile>
+
+        <profile>
+            <id>java15</id>
+            <properties>
+                <jdk-version>15</jdk-version>
+                <enable-preview>--enable-preview</enable-preview>
+            </properties>
+        </profile>
     </profiles>
 </project>

record-builder-core/pom.xml

@@ -3,7 +3,7 @@
     <parent>
         <groupId>io.soabase.record-builder</groupId>
         <artifactId>record-builder</artifactId>
-        <version>1.11.ea</version>
+        <version>1.18-java15</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

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
      *

record-builder-processor/pom.xml

@@ -3,7 +3,7 @@
     <parent>
         <groupId>io.soabase.record-builder</groupId>
         <artifactId>record-builder</artifactId>
-        <version>1.11.ea</version>
+        <version>1.18-java15</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

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

@@ -86,8 +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

@@ -53,6 +53,7 @@ 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, Optional<String> packageNameOpt)
     {
@@ -62,6 +63,7 @@ class InternalRecordBuilderProcessor
         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)
@@ -69,7 +71,10 @@ class InternalRecordBuilderProcessor
                 .addTypeVariables(typeVariables);
         addWithNestedClass();
         addDefaultConstructor();
-        addAllArgsConstructor();
+        addStaticBuilder();
+        if (recordComponents.size() > 0) {
+            addAllArgsConstructor();
+        }
         addStaticDefaultBuilderMethod();
         addStaticCopyBuilderMethod();
         addStaticComponentsMethod();
@@ -82,6 +87,7 @@ class InternalRecordBuilderProcessor
             add1SetterMethod(component);
             add1GetterMethod(component);
         });
+        addStaticDowncastMethod();
         builderType = builder.build();
     }
 
@@ -128,15 +134,13 @@ class InternalRecordBuilderProcessor
             Adds a method that returns a pre-filled copy builder similar to:
 
             default MyRecord with(Consumer<MyRecordBuilder> consumer) {
-                MyRecord r = (MyRecord)(Object)this;
-                MyRecordBuilder builder MyRecordBuilder.builder(r);
+                MyRecordBuilder builder = with();
                 consumer.accept(builder);
                 return builder.build();
             }
          */
         var codeBlockBuilder = CodeBlock.builder()
-                .add("var r = ($T)(Object)this;\n", recordClassType.typeName())
-                .add("$T builder = $L.$L(r);\n", builderClassType.typeName(), builderClassType.name(), metaData.copyMethodName())
+                .add("$T builder = with();\n", builderClassType.typeName())
                 .add("consumer.accept(builder);\n")
                 .add("return builder.build();\n");
         var consumerType = ParameterizedTypeName.get(ClassName.get(Consumer.class), builderClassType.typeName());
@@ -158,13 +162,13 @@ class InternalRecordBuilderProcessor
             Adds a method that returns a pre-filled copy builder similar to:
 
             default MyRecordBuilder with() {
-                MyRecord r = (MyRecord)(Object)this;
+                MyRecord r = _downcast(this);
                 return MyRecordBuilder.builder(r);
             }
          */
         var codeBlockBuilder = CodeBlock.builder()
-                .add("var r = ($T)(Object)this;\n", recordClassType.typeName())
-                .add("return $L.$L(r);", builderClassType.name(), metaData.copyMethodName());
+                .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")
@@ -175,19 +179,35 @@ class InternalRecordBuilderProcessor
         classBuilder.addMethod(methodSpec);
     }
 
+    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 = (MyRecord)(Object)this;
+                MyRecord r = _downcast(this);
                 return new MyRecord(name, r.age());
             }
          */
-        var codeBlockBuilder = CodeBlock.builder()
-                .add("var r = ($T)(Object)this;\n", recordClassType.typeName())
-                .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 $T(", recordClassType.typeName());
         IntStream.range(0, recordComponents.size()).forEach(parameterIndex -> {
             if (parameterIndex > 0) {
                 codeBlockBuilder.add(", ");
@@ -197,7 +217,7 @@ class InternalRecordBuilderProcessor
                 codeBlockBuilder.add(parameterComponent.name());
             }
             else {
-                codeBlockBuilder.add("r.$L()", parameterComponent.name());
+                codeBlockBuilder.add("$L.$L()", uniqueVarName, parameterComponent.name());
             }
         });
         codeBlockBuilder.add(");");
@@ -230,6 +250,27 @@ class InternalRecordBuilderProcessor
         builder.addMethod(constructor);
     }
 
+    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()
     {
         /*
@@ -325,14 +366,14 @@ 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.$L)", name, name);
+                codeBuilder.add("\n&& ($L == $L.$L)", name, uniqueVarName, name);
             }
             else {
-                codeBuilder.add("\n&& $T.equals($L, b.$L)", Objects.class, name, name);
+                codeBuilder.add("\n&& $T.equals($L, $L.$L)", Objects.class, name, uniqueVarName, name);
             }
         });
         codeBuilder.add(")");
@@ -357,6 +398,22 @@ 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 $T(", recordClassType.typeName());
         IntStream.range(0, recordComponents.size()).forEach(index -> {
             if (index > 0) {
@@ -365,15 +422,7 @@ class InternalRecordBuilderProcessor
             codeBuilder.add("$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()
@@ -461,6 +510,38 @@ class InternalRecordBuilderProcessor
         builder.addMethod(methodSpec);
     }
 
+    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 by " + 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)
     {
         /*

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

@@ -48,12 +48,17 @@ class InternalRecordInterfaceProcessor {
     private final ProcessingEnvironment processingEnv;
     private final String packageName;
     private final TypeSpec recordType;
-    private final List<ExecutableElement> recordComponents;
+    private final List<Component> recordComponents;
     private final TypeElement iface;
     private final ClassType recordClassType;
+    private final List<String> alternateMethods;
 
     private static final String FAKE_METHOD_NAME = "__FAKE__";
 
+    private static final Set<String> javaBeanPrefixes = Set.of("get", "is");
+
+    private record Component(ExecutableElement element, Optional<String> alternateName){}
+
     InternalRecordInterfaceProcessor(ProcessingEnvironment processingEnv, TypeElement iface, boolean addRecordBuilder, RecordBuilderMetaData metaData, Optional<String> packageNameOpt) {
         this.processingEnv = processingEnv;
         packageName = packageNameOpt.orElseGet(() -> ElementUtils.getPackageName(iface));
@@ -79,6 +84,8 @@ class InternalRecordInterfaceProcessor {
             builder.addSuperinterface(builderClassType.typeName());
         }
 
+        alternateMethods = buildAlternateMethods(recordComponents);
+
         recordType = builder.build();
     }
 
@@ -126,22 +133,43 @@ class InternalRecordInterfaceProcessor {
         String declaration = matcher.group(1).trim().replace("class", "record");
         String implementsSection = matcher.group(2).trim();
         String argumentList = matcher.group(5).trim();
-        return declaration + argumentList + " " + implementsSection + " {}";
+
+        StringBuilder fixedRecord = new StringBuilder(declaration).append(argumentList).append(' ').append(implementsSection).append(" {");
+        alternateMethods.forEach(method -> fixedRecord.append('\n').append(method));
+        fixedRecord.append('}');
+        return fixedRecord.toString();
     }
 
     private MethodSpec generateArgumentList()
     {
         MethodSpec.Builder builder = MethodSpec.methodBuilder(FAKE_METHOD_NAME);
-        recordComponents.forEach(element -> {
-            ParameterSpec parameterSpec = ParameterSpec.builder(ClassName.get(element.getReturnType()), element.getSimpleName().toString()).build();
-            builder.addTypeVariables(element.getTypeParameters().stream().map(TypeVariableName::get).collect(Collectors.toList()));
+        recordComponents.forEach(component -> {
+            String name = component.alternateName.orElseGet(() -> component.element.getSimpleName().toString());
+            ParameterSpec parameterSpec = ParameterSpec.builder(ClassName.get(component.element.getReturnType()), name).build();
+            builder.addTypeVariables(component.element.getTypeParameters().stream().map(TypeVariableName::get).collect(Collectors.toList()));
             builder.addParameter(parameterSpec);
         });
         return builder.build();
     }
 
-    private List<ExecutableElement> getRecordComponents(TypeElement iface) {
-        List<ExecutableElement> components = new ArrayList<>();
+    private List<String> buildAlternateMethods(List<Component> recordComponents) {
+        return recordComponents.stream()
+            .filter(component -> component.alternateName.isPresent())
+            .map(component -> {
+                var method = MethodSpec.methodBuilder(component.element.getSimpleName().toString())
+                    .addAnnotation(Override.class)
+                    .addAnnotation(generatedRecordInterfaceAnnotation)
+                    .returns(ClassName.get(component.element.getReturnType()))
+                    .addModifiers(Modifier.PUBLIC)
+                    .addCode("return $L();", component.alternateName.get())
+                    .build();
+                return method.toString();
+            })
+            .collect(Collectors.toList());
+    }
+
+    private List<Component> getRecordComponents(TypeElement iface) {
+        List<Component> components = new ArrayList<>();
         try {
             getRecordComponents(iface, components, new HashSet<>(), new HashSet<>());
             if (components.isEmpty()) {
@@ -153,15 +181,15 @@ class InternalRecordInterfaceProcessor {
         }
         return components;
     }
-
     private static class IllegalInterface extends RuntimeException
     {
         public IllegalInterface(String message) {
             super(message);
         }
+
     }
 
-    private void getRecordComponents(TypeElement iface, Collection<? super ExecutableElement> components, Set<String> visitedSet, Set<String> usedNames) {
+    private void getRecordComponents(TypeElement iface, Collection<Component> components, Set<String> visitedSet, Set<String> usedNames) {
         if (!visitedSet.add(iface.getQualifiedName().toString())) {
             return;
         }
@@ -184,10 +212,22 @@ class InternalRecordInterfaceProcessor {
                     }
                 })
                 .filter(element -> usedNames.add(element.getSimpleName().toString()))
+                .map(element -> new Component(element, stripBeanPrefix(element.getSimpleName().toString())))
                 .collect(Collectors.toCollection(() -> components));
         iface.getInterfaces().forEach(parentIface -> {
             TypeElement parentIfaceElement = (TypeElement) processingEnv.getTypeUtils().asElement(parentIface);
             getRecordComponents(parentIfaceElement, components, visitedSet, usedNames);
         });
     }
+
+    private Optional<String> stripBeanPrefix(String name)
+    {
+        return javaBeanPrefixes.stream()
+            .filter(prefix -> name.startsWith(prefix) && (name.length() > prefix.length()))
+            .findFirst()
+            .map(prefix -> {
+                var stripped = name.substring(prefix.length());
+                return Character.toLowerCase(stripped.charAt(0)) + stripped.substring(1);
+            });
+    }
 }

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()
      */
@@ -80,6 +85,7 @@ public class OptionBasedRecordBuilderMetaData implements RecordBuilderMetaData {
     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;
@@ -93,6 +99,7 @@ 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());
@@ -126,6 +133,11 @@ public class OptionBasedRecordBuilderMetaData implements RecordBuilderMetaData {
         return buildMethodName;
     }
 
+    @Override
+    public String downCastMethodName() {
+        return downCastMethodName;
+    }
+
     @Override
     public String componentsMethodName() {
         return componentsMethodName;

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

@@ -117,15 +117,18 @@ public class RecordBuilderProcessor extends AbstractProcessor {
                     else
                     {
                         var packageName = buildPackageName(packagePattern, element, typeElement);
-                        if ( annotationClass.equals(RECORD_INTERFACE_INCLUDE) )
+                        if (packageName != null)
                         {
-                            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));
+                            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));
+                            }
                         }
                     }
                 }
@@ -134,13 +137,28 @@ public class RecordBuilderProcessor extends AbstractProcessor {
     }
 
     private String buildPackageName(String packagePattern, Element builderElement, TypeElement includedClass) {
-        String replaced = packagePattern.replace("*", ((PackageElement)includedClass.getEnclosingElement()).getQualifiedName().toString());
+        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() )
         {

record-builder-test/pom.xml

@@ -3,7 +3,7 @@
     <parent>
         <groupId>io.soabase.record-builder</groupId>
         <artifactId>record-builder</artifactId>
-        <version>1.11.ea</version>
+        <version>1.18-java15</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
@@ -13,6 +13,7 @@
         <dependency>
             <groupId>io.soabase.record-builder</groupId>
             <artifactId>record-builder-core</artifactId>
+            <scope>provided</scope>
         </dependency>
 
         <dependency>
@@ -42,6 +43,10 @@
                     <annotationProcessors>
                         <annotationProcessor>io.soabase.recordbuilder.processor.RecordBuilderProcessor</annotationProcessor>
                     </annotationProcessors>
+                    <release>${jdk-version}</release>
+                    <compilerArgs>
+                        <arg>${enable-preview}</arg>
+                    </compilerArgs>
                 </configuration>
             </plugin>
 

record-builder-test/src/main/java/io/soabase/recordbuilder/test/BeanStyle.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.RecordInterface;
+import java.time.Instant;
+
+@RecordInterface
+public interface BeanStyle {
+    String getName();
+
+    Instant getDate();
+
+    boolean isSomething();
+}

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

@@ -15,10 +15,14 @@
  */
 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/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/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/test/java/io/soabase/recordbuilder/test/TestRecordInterface.java

@@ -20,6 +20,9 @@ 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
@@ -32,4 +35,17 @@ public class TestRecordInterface
         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

@@ -59,4 +59,11 @@ class TestWithers {
         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));
+    }
 }