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SuperBuilder toBuilder: generate static toBuilder helper method (ecj)
This commit is contained in:
Jan Rieke committed
1 parent
14fa70ae18
commit
f5fff49f73
3 files changed
+119
-69
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@@ -107,7 +107,11 @@ public class HandleSuperBuilder extends EclipseAnnotationHandler<SuperBuilder> {
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private static final String TO_BUILDER_METHOD_NAME_STRING = "toBuilder";
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private static final char[] TO_BUILDER_METHOD_NAME = TO_BUILDER_METHOD_NAME_STRING.toCharArray();
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private static final char[] FILL_VALUES_METHOD_NAME = "$fillValuesFrom".toCharArray();
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private static final char[] FILL_VALUES_STATIC_METHOD_NAME = "$fillValuesFromInstanceIntoBuilder".toCharArray();
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private static final char[] EMPTY_LIST = "emptyList".toCharArray();
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private static final char[] INSTANCE_VARIABLE_NAME = "instance".toCharArray();
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private static final String BUILDER_VARIABLE_NAME_STRING = "b";
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private static final char[] BUILDER_VARIABLE_NAME = BUILDER_VARIABLE_NAME_STRING.toCharArray();
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private static final AbstractMethodDeclaration[] EMPTY_METHODS = {};
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@@ -294,7 +298,7 @@ public class HandleSuperBuilder extends EclipseAnnotationHandler<SuperBuilder> {
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if (toBuilder) {
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// Generate $fillValuesFrom() method in the abstract builder.
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injectMethod(builderType, generateFillValuesMethod(tdParent, superclassBuilderClass != null, builderGenericName, classGenericName, typeParams, builderFields, ast));
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injectMethod(builderType, generateFillValuesMethod(tdParent, superclassBuilderClass != null, builderGenericName, classGenericName, builderImplClassName, typeParams, builderFields, ast));
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}
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// Generate abstract self() and build() methods in the abstract builder.
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@@ -323,8 +327,9 @@ public class HandleSuperBuilder extends EclipseAnnotationHandler<SuperBuilder> {
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if (addCleaning) injectMethod(builderType, generateCleanMethod(builderFields, builderType, ast));
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if ((td.modifiers & ClassFileConstants.AccAbstract) != 0) {
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if ((td.modifiers & ClassFileConstants.AccAbstract) != 0 && !toBuilder) {
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// Only non-abstract classes get the Builder implementation.
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// However, if we want to generate a toBuilder, we need a helper function in the builder implementation class.
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return;
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}
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@@ -336,7 +341,24 @@ public class HandleSuperBuilder extends EclipseAnnotationHandler<SuperBuilder> {
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annotationNode.addError("@SuperBuilder does not support customized builders. Use @Builder instead.");
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return;
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}
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if (toBuilder) {
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// Generate $fillValuesFromInstanceIntoBuilder() method in the builder implementation class.
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injectMethod(builderImplType, generateStaticFillValuesMethod(tdParent, superclassBuilderClass != null, builderClassName, classGenericName, typeParams, builderFields, ast));
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switch (methodExists(TO_BUILDER_METHOD_NAME_STRING, tdParent, 0)) {
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case EXISTS_BY_USER:
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annotationNode.addWarning("Not generating toBuilder() as it already exists.");
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break;
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case NOT_EXISTS:
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injectMethod(tdParent, generateToBuilderMethod(builderClassName, builderImplClassName, tdParent, typeParams, ast));
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}
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if ((td.modifiers & ClassFileConstants.AccAbstract) != 0) {
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// The rest of the builder implementation class is not necessary for abstract classes.
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return;
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}
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}
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// Create the self() and build() methods in the BuilderImpl.
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injectMethod(builderImplType, generateSelfMethod(builderImplType, typeParams, p));
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injectMethod(builderImplType, generateBuildMethod(tdParent, buildMethodName, returnType, ast));
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@@ -346,15 +368,6 @@ public class HandleSuperBuilder extends EclipseAnnotationHandler<SuperBuilder> {
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MethodDeclaration md = generateBuilderMethod(builderMethodName, builderClassName, builderImplClassName, tdParent, typeParams, ast);
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if (md != null) injectMethod(tdParent, md);
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}
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if (toBuilder) switch (methodExists(TO_BUILDER_METHOD_NAME_STRING, tdParent, 0)) {
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case EXISTS_BY_USER:
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annotationNode.addWarning("Not generating toBuilder() as it already exists.");
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break;
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case NOT_EXISTS:
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MethodDeclaration md = generateToBuilderMethod(builderClassName, builderImplClassName, tdParent, typeParams, ast);
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if (md != null) injectMethod(tdParent, md);
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}
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}
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private EclipseNode generateBuilderAbstractClass(EclipseNode tdParent, String builderClass,
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@@ -449,7 +462,7 @@ public class HandleSuperBuilder extends EclipseAnnotationHandler<SuperBuilder> {
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constructor.selector = typeDeclaration.name;
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if (callBuilderBasedSuperConstructor) {
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constructor.constructorCall = new ExplicitConstructorCall(ExplicitConstructorCall.Super);
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constructor.constructorCall.arguments = new Expression[] {new SingleNameReference("b".toCharArray(), p)};
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constructor.constructorCall.arguments = new Expression[] {new SingleNameReference(BUILDER_VARIABLE_NAME, p)};
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} else {
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constructor.constructorCall = new ExplicitConstructorCall(ExplicitConstructorCall.ImplicitSuper);
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}
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@@ -463,7 +476,7 @@ public class HandleSuperBuilder extends EclipseAnnotationHandler<SuperBuilder> {
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TypeReference[] wildcards = new TypeReference[] {new Wildcard(Wildcard.UNBOUND), new Wildcard(Wildcard.UNBOUND)};
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TypeReference builderType = new ParameterizedSingleTypeReference(builderClassName.toCharArray(), mergeToTypeReferences(typeParams, wildcards), 0, p);
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constructor.arguments = new Argument[] {new Argument("b".toCharArray(), p, builderType, Modifier.FINAL)};
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constructor.arguments = new Argument[] {new Argument(BUILDER_VARIABLE_NAME, p, builderType, Modifier.FINAL)};
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List<Statement> statements = new ArrayList<Statement>();
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@@ -476,10 +489,10 @@ public class HandleSuperBuilder extends EclipseAnnotationHandler<SuperBuilder> {
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Expression assignmentExpr;
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if (fieldNode.singularData != null && fieldNode.singularData.getSingularizer() != null) {
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fieldNode.singularData.getSingularizer().appendBuildCode(fieldNode.singularData, typeNode, statements, fieldNode.name, "b");
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fieldNode.singularData.getSingularizer().appendBuildCode(fieldNode.singularData, typeNode, statements, fieldNode.name, BUILDER_VARIABLE_NAME_STRING);
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assignmentExpr = new SingleNameReference(fieldNode.name, p);
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} else {
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char[][] variableInBuilder = new char[][] {"b".toCharArray(), fieldName};
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char[][] variableInBuilder = new char[][] {BUILDER_VARIABLE_NAME, fieldName};
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long[] positions = new long[] {p, p};
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assignmentExpr = new QualifiedNameReference(variableInBuilder, positions, s, e);
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}
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@@ -487,7 +500,7 @@ public class HandleSuperBuilder extends EclipseAnnotationHandler<SuperBuilder> {
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// In case of @Builder.Default, set the value to the default if it was NOT set in the builder.
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if (fieldNode.nameOfSetFlag != null) {
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char[][] setVariableInBuilder = new char[][] {"b".toCharArray(), fieldNode.nameOfSetFlag};
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char[][] setVariableInBuilder = new char[][] {BUILDER_VARIABLE_NAME, fieldNode.nameOfSetFlag};
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long[] positions = new long[] {p, p};
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QualifiedNameReference setVariableInBuilderRef = new QualifiedNameReference(setVariableInBuilder, positions, s, e);
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@@ -585,12 +598,12 @@ public class HandleSuperBuilder extends EclipseAnnotationHandler<SuperBuilder> {
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* <pre>
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* protected B $fillValuesFrom(final C instance) {
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* super.$fillValuesFrom(instance);
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* this.field(instance.field);
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* FoobarBuilderImpl.$fillValuesFromInstanceIntoBuilder(instance, this);
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* return self();
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* }
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* </pre>
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*/
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private MethodDeclaration generateFillValuesMethod(EclipseNode tdParent, boolean inherited, String builderGenericName, String classGenericName, TypeParameter[] typeParams, java.util.List<BuilderFieldData> builderFields, ASTNode source) {
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private MethodDeclaration generateFillValuesMethod(EclipseNode tdParent, boolean inherited, String builderGenericName, String classGenericName, String builderImplClassName, TypeParameter[] typeParams, java.util.List<BuilderFieldData> builderFields, ASTNode source) {
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MethodDeclaration out = new MethodDeclaration(((CompilationUnitDeclaration) tdParent.top().get()).compilationResult);
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out.selector = FILL_VALUES_METHOD_NAME;
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out.bits |= ECLIPSE_DO_NOT_TOUCH_FLAG;
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@@ -598,9 +611,8 @@ public class HandleSuperBuilder extends EclipseAnnotationHandler<SuperBuilder> {
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if (inherited) out.annotations = new Annotation[] {makeMarkerAnnotation(TypeConstants.JAVA_LANG_OVERRIDE, tdParent.get())};
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out.returnType = new SingleTypeReference(builderGenericName.toCharArray(), 0);
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final String instanceVariableName = "instance";
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TypeReference builderType = createTypeReferenceWithTypeParameters(classGenericName, typeParams);
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out.arguments = new Argument[] {new Argument(instanceVariableName.toCharArray(), 0, builderType, Modifier.FINAL)};
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out.arguments = new Argument[] {new Argument(INSTANCE_VARIABLE_NAME, 0, builderType, Modifier.FINAL)};
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List<Statement> body = new ArrayList<Statement>();
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@@ -609,16 +621,18 @@ public class HandleSuperBuilder extends EclipseAnnotationHandler<SuperBuilder> {
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MessageSend callToSuper = new MessageSend();
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callToSuper.receiver = new SuperReference(0, 0);
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callToSuper.selector = FILL_VALUES_METHOD_NAME;
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callToSuper.arguments = new Expression[] {new SingleNameReference(instanceVariableName.toCharArray(), 0)};
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callToSuper.arguments = new Expression[] {new SingleNameReference(INSTANCE_VARIABLE_NAME, 0)};
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body.add(callToSuper);
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}
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// Call the builder's setter methods to fill the values from the instance.
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for (BuilderFieldData bfd : builderFields) {
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MessageSend exec = createSetterCallWithInstanceValue(bfd, instanceVariableName, tdParent, source);
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body.add(exec);
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}
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// Call the builder implemention's helper method that actually fills the values from the instance.
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MessageSend callStaticFillValuesMethod = new MessageSend();
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callStaticFillValuesMethod.receiver = new SingleNameReference(builderImplClassName.toCharArray(), 0);
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callStaticFillValuesMethod.selector = FILL_VALUES_STATIC_METHOD_NAME;
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callStaticFillValuesMethod.arguments = new Expression[] {new SingleNameReference(INSTANCE_VARIABLE_NAME, 0), new ThisReference(0, 0)};
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body.add(callStaticFillValuesMethod);
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// Return self().
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MessageSend returnCall = new MessageSend();
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returnCall.receiver = ThisReference.implicitThis();
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returnCall.selector = SELF_METHOD_NAME;
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@@ -629,40 +643,76 @@ public class HandleSuperBuilder extends EclipseAnnotationHandler<SuperBuilder> {
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return out;
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}
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private MessageSend createSetterCallWithInstanceValue(BuilderFieldData bfd, final String instanceVariableName, EclipseNode type, ASTNode source) {
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char[] setterName = bfd.name;
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MessageSend ms = new MessageSend();
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Expression[] tgt = new Expression[bfd.singularData == null ? 1 : 2];
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if (bfd.obtainVia == null || !bfd.obtainVia.field().isEmpty()) {
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char[] fieldName = bfd.obtainVia == null ? bfd.rawName : bfd.obtainVia.field().toCharArray();
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for (int i = 0; i < tgt.length; i++) {
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FieldReference fr = new FieldReference(fieldName, 0);
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fr.receiver = new SingleNameReference(instanceVariableName.toCharArray(), 0);
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tgt[i] = fr;
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}
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} else {
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String obtainName = bfd.obtainVia.method();
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boolean obtainIsStatic = bfd.obtainVia.isStatic();
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for (int i = 0; i < tgt.length; i++) {
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MessageSend obtainExpr = new MessageSend();
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obtainExpr.receiver = obtainIsStatic ? new SingleNameReference(type.getName().toCharArray(), 0) : new SingleNameReference(instanceVariableName.toCharArray(), 0);
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obtainExpr.selector = obtainName.toCharArray();
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if (obtainIsStatic) obtainExpr.arguments = new Expression[] {new SingleNameReference(instanceVariableName.toCharArray(), 0)};
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tgt[i] = obtainExpr;
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}
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/**
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* Generates a <code>$fillValuesFromInstanceIntoBuilder()</code> method in
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* the builder implementation class that copies all fields from the instance
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* to the builder. It looks like this:
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*
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* <pre>
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* protected B $fillValuesFromInstanceIntoBuilder(Foobar instance, FoobarBuilder<?, ?> b) {
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* b.field(instance.field);
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* }
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* </pre>
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*/
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private MethodDeclaration generateStaticFillValuesMethod(EclipseNode tdParent, boolean inherited, String builderClassName, String classGenericName, TypeParameter[] typeParams, java.util.List<BuilderFieldData> builderFields, ASTNode source) {
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MethodDeclaration out = new MethodDeclaration(((CompilationUnitDeclaration) tdParent.top().get()).compilationResult);
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out.selector = FILL_VALUES_STATIC_METHOD_NAME;
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out.bits |= ECLIPSE_DO_NOT_TOUCH_FLAG;
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out.modifiers = ClassFileConstants.AccPrivate | ClassFileConstants.AccStatic;
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out.returnType = TypeReference.baseTypeReference(TypeIds.T_void, 0);
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TypeReference[] wildcards = new TypeReference[] {new Wildcard(Wildcard.UNBOUND), new Wildcard(Wildcard.UNBOUND)};
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TypeReference builderType = new ParameterizedSingleTypeReference(builderClassName.toCharArray(), mergeToTypeReferences(typeParams, wildcards), 0, 0);
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Argument builderArgument = new Argument(BUILDER_VARIABLE_NAME, 0, builderType, Modifier.FINAL);
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out.arguments = new Argument[] {new Argument(INSTANCE_VARIABLE_NAME, 0, new SingleTypeReference(tdParent.getName().toCharArray(), 0), Modifier.FINAL), builderArgument};
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List<Statement> body = new ArrayList<Statement>();
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// Call the builder's setter methods to fill the values from the instance.
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for (BuilderFieldData bfd : builderFields) {
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MessageSend exec = createSetterCallWithInstanceValue(bfd, tdParent, source);
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body.add(exec);
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}
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out.statements = body.isEmpty() ? null : body.toArray(new Statement[body.size()]);
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return out;
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}
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private MessageSend createSetterCallWithInstanceValue(BuilderFieldData bfd, EclipseNode type, ASTNode source) {
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char[] setterName = bfd.name;
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MessageSend ms = new MessageSend();
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Expression[] tgt = new Expression[bfd.singularData == null ? 1 : 2];
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if (bfd.obtainVia == null || !bfd.obtainVia.field().isEmpty()) {
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char[] fieldName = bfd.obtainVia == null ? bfd.rawName : bfd.obtainVia.field().toCharArray();
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for (int i = 0; i < tgt.length; i++) {
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FieldReference fr = new FieldReference(fieldName, 0);
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fr.receiver = new SingleNameReference(INSTANCE_VARIABLE_NAME, 0);
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tgt[i] = fr;
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}
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if (bfd.singularData == null) {
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ms.arguments = tgt;
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} else {
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Expression ifNull = new EqualExpression(tgt[0], new NullLiteral(0, 0), OperatorIds.EQUAL_EQUAL);
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MessageSend emptyList = new MessageSend();
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emptyList.receiver = generateQualifiedNameRef(source, TypeConstants.JAVA, TypeConstants.UTIL, "Collections".toCharArray());
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emptyList.selector = EMPTY_LIST;
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ms.arguments = new Expression[] {new ConditionalExpression(ifNull, emptyList, tgt[1])};
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} else {
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String obtainName = bfd.obtainVia.method();
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boolean obtainIsStatic = bfd.obtainVia.isStatic();
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for (int i = 0; i < tgt.length; i++) {
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MessageSend obtainExpr = new MessageSend();
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obtainExpr.receiver = obtainIsStatic ? new SingleNameReference(type.getName().toCharArray(), 0) : new SingleNameReference(INSTANCE_VARIABLE_NAME, 0);
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obtainExpr.selector = obtainName.toCharArray();
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if (obtainIsStatic) obtainExpr.arguments = new Expression[] {new SingleNameReference(INSTANCE_VARIABLE_NAME, 0)};
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tgt[i] = obtainExpr;
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}
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ms.receiver = ThisReference.implicitThis();
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ms.selector = setterName;
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}
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if (bfd.singularData == null) {
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ms.arguments = tgt;
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} else {
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Expression ifNull = new EqualExpression(tgt[0], new NullLiteral(0, 0), OperatorIds.EQUAL_EQUAL);
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MessageSend emptyList = new MessageSend();
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emptyList.receiver = generateQualifiedNameRef(source, TypeConstants.JAVA, TypeConstants.UTIL, "Collections".toCharArray());
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emptyList.selector = EMPTY_LIST;
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ms.arguments = new Expression[] {new ConditionalExpression(ifNull, emptyList, tgt[1])};
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}
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ms.receiver = new SingleNameReference(BUILDER_VARIABLE_NAME, 0);
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ms.selector = setterName;
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return ms;
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}
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@@ -79,7 +79,7 @@ public class SuperBuilderBasicToBuilder {
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@java.lang.SuppressWarnings("all")
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private static final class ParentBuilderImpl extends ParentBuilder<Parent, ParentBuilderImpl> {
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@java.lang.SuppressWarnings("all")
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private static void $fillValuesFromInstanceIntoBuilder(Parent instance, ParentBuilder<?,?> b) {
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private static void $fillValuesFromInstanceIntoBuilder(final Parent instance, final ParentBuilder<?,?> b) {
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b.field1(instance.field1);
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b.obtainViaField(instance.field1);
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b.obtainViaMethod(instance.method());
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@@ -161,7 +161,7 @@ public class SuperBuilderBasicToBuilder {
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@java.lang.SuppressWarnings("all")
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private static final class ChildBuilderImpl extends ChildBuilder<Child, ChildBuilderImpl> {
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@java.lang.SuppressWarnings("all")
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private static void $fillValuesFromInstanceIntoBuilder(Parent instance, ParentBuilder<?,?> b) {
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private static void $fillValuesFromInstanceIntoBuilder(final Parent instance, final ParentBuilder<?,?> b) {
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b.field3(instance.field3);
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}
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@java.lang.SuppressWarnings("all")
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@@ -57,7 +57,7 @@ public class SuperBuilderBasicToBuilder {
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private ParentBuilderImpl() {
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super();
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}
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private static @java.lang.SuppressWarnings("all") void $fillValuesFromInstanceIntoBuilder(Parent instance, ParentBuilder<?,?> b) {
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private static @java.lang.SuppressWarnings("all") void $fillValuesFromInstanceIntoBuilder(final Parent instance, final ParentBuilder<?, ?> b) {
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b.field1(instance.field1);
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b.obtainViaField(instance.field1);
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b.obtainViaMethod(instance.method());
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@@ -101,12 +101,12 @@ public class SuperBuilderBasicToBuilder {
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}
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this.items = items;
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}
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public static @java.lang.SuppressWarnings("all") ParentBuilder<?, ?> builder() {
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return new ParentBuilderImpl();
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}
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public @java.lang.SuppressWarnings("all") ParentBuilder<?, ?> toBuilder() {
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return new ParentBuilderImpl().$fillValuesFrom(this);
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}
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public static @java.lang.SuppressWarnings("all") ParentBuilder<?, ?> builder() {
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return new ParentBuilderImpl();
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}
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}
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public static @lombok.experimental.SuperBuilder(toBuilder = true) class Child extends Parent {
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public static abstract @java.lang.SuppressWarnings("all") class ChildBuilder<C extends Child, B extends ChildBuilder<C, B>> extends Parent.ParentBuilder<C, B> {
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@@ -133,7 +133,7 @@ public class SuperBuilderBasicToBuilder {
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private ChildBuilderImpl() {
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super();
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}
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private static @java.lang.SuppressWarnings("all") void $fillValuesFromInstanceIntoBuilder(Child instance, ChildBuilder<?,?> b) {
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private static @java.lang.SuppressWarnings("all") void $fillValuesFromInstanceIntoBuilder(final Child instance, final ChildBuilder<?, ?> b) {
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b.field3(instance.field3);
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}
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protected @java.lang.Override @java.lang.SuppressWarnings("all") ChildBuilderImpl self() {
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@@ -148,12 +148,12 @@ public class SuperBuilderBasicToBuilder {
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super(b);
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this.field3 = b.field3;
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}
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public static @java.lang.SuppressWarnings("all") ChildBuilder<?, ?> builder() {
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return new ChildBuilderImpl();
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}
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public @java.lang.SuppressWarnings("all") ChildBuilder<?, ?> toBuilder() {
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return new ChildBuilderImpl().$fillValuesFrom(this);
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}
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public static @java.lang.SuppressWarnings("all") ChildBuilder<?, ?> builder() {
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return new ChildBuilderImpl();
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}
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}
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public SuperBuilderBasicToBuilder() {
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super();
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