forked from projectlombok/lombok
/
HandleSuperBuilder.java
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HandleSuperBuilder.java
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/*
* Copyright (C) 2013-2021 The Project Lombok Authors.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package lombok.javac.handlers;
import static lombok.javac.handlers.HandleBuilder.*;
import static lombok.core.handlers.HandlerUtil.*;
import static lombok.javac.Javac.*;
import static lombok.javac.handlers.JavacHandlerUtil.*;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import javax.lang.model.element.Modifier;
import com.sun.tools.javac.code.BoundKind;
import com.sun.tools.javac.code.Flags;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.JCTree.JCAnnotation;
import com.sun.tools.javac.tree.JCTree.JCAssign;
import com.sun.tools.javac.tree.JCTree.JCBlock;
import com.sun.tools.javac.tree.JCTree.JCClassDecl;
import com.sun.tools.javac.tree.JCTree.JCExpression;
import com.sun.tools.javac.tree.JCTree.JCExpressionStatement;
import com.sun.tools.javac.tree.JCTree.JCFieldAccess;
import com.sun.tools.javac.tree.JCTree.JCIdent;
import com.sun.tools.javac.tree.JCTree.JCMethodDecl;
import com.sun.tools.javac.tree.JCTree.JCMethodInvocation;
import com.sun.tools.javac.tree.JCTree.JCModifiers;
import com.sun.tools.javac.tree.JCTree.JCReturn;
import com.sun.tools.javac.tree.JCTree.JCStatement;
import com.sun.tools.javac.tree.JCTree.JCTypeApply;
import com.sun.tools.javac.tree.JCTree.JCTypeParameter;
import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
import com.sun.tools.javac.tree.JCTree.JCWildcard;
import com.sun.tools.javac.util.List;
import com.sun.tools.javac.util.ListBuffer;
import com.sun.tools.javac.util.Name;
import lombok.AccessLevel;
import lombok.Builder;
import lombok.Builder.ObtainVia;
import lombok.ConfigurationKeys;
import lombok.Singular;
import lombok.ToString;
import lombok.core.AST.Kind;
import lombok.core.configuration.CheckerFrameworkVersion;
import lombok.core.AnnotationValues;
import lombok.core.HandlerPriority;
import lombok.core.handlers.HandlerUtil;
import lombok.core.handlers.HandlerUtil.FieldAccess;
import lombok.core.handlers.InclusionExclusionUtils.Included;
import lombok.experimental.NonFinal;
import lombok.experimental.SuperBuilder;
import lombok.javac.Javac;
import lombok.javac.JavacAnnotationHandler;
import lombok.javac.JavacNode;
import lombok.javac.JavacTreeMaker;
import lombok.javac.handlers.HandleBuilder.BuilderFieldData;
import lombok.javac.handlers.HandleBuilder.BuilderJob;
import lombok.javac.handlers.JavacHandlerUtil.MemberExistsResult;
import lombok.javac.handlers.JavacSingularsRecipes.ExpressionMaker;
import lombok.javac.handlers.JavacSingularsRecipes.JavacSingularizer;
import lombok.javac.handlers.JavacSingularsRecipes.SingularData;
import lombok.javac.handlers.JavacSingularsRecipes.StatementMaker;
import lombok.spi.Provides;
@Provides
@HandlerPriority(-1024) //-2^10; to ensure we've picked up @FieldDefault's changes (-2048) but @Value hasn't removed itself yet (-512), so that we can error on presence of it on the builder classes.
public class HandleSuperBuilder extends JavacAnnotationHandler<SuperBuilder> {
private static final String SELF_METHOD = "self";
private static final String FILL_VALUES_METHOD_NAME = "$fillValuesFrom";
private static final String STATIC_FILL_VALUES_METHOD_NAME = "$fillValuesFromInstanceIntoBuilder";
private static final String INSTANCE_VARIABLE_NAME = "instance";
private static final String BUILDER_VARIABLE_NAME = "b";
class SuperBuilderJob extends BuilderJob {
JavacNode builderAbstractType;
String builderAbstractClassName;
JavacNode builderImplType;
String builderImplClassName;
List<JCTypeParameter> builderTypeParams_;
void init(AnnotationValues<SuperBuilder> annValues, SuperBuilder ann, JavacNode node) {
accessOuters = accessInners = AccessLevel.PUBLIC;
oldFluent = true;
oldChain = true;
builderMethodName = ann.builderMethodName();
buildMethodName = ann.buildMethodName();
toBuilder = ann.toBuilder();
if (builderMethodName == null) builderMethodName = "builder";
if (buildMethodName == null) buildMethodName = "build";
builderClassName = getBuilderClassNameTemplate(node, null);
}
void setBuilderToImpl() {
builderType = builderImplType;
builderClassName = builderImplClassName;
builderTypeParams = typeParams;
}
void setBuilderToAbstract() {
builderType = builderAbstractType;
builderClassName = builderAbstractClassName;
builderTypeParams = builderTypeParams_;
}
}
@Override
public void handle(AnnotationValues<SuperBuilder> annotation, JCAnnotation ast, JavacNode annotationNode) {
handleExperimentalFlagUsage(annotationNode, ConfigurationKeys.SUPERBUILDER_FLAG_USAGE, "@SuperBuilder");
SuperBuilderJob job = new SuperBuilderJob();
job.sourceNode = annotationNode;
job.checkerFramework = getCheckerFrameworkVersion(annotationNode);
job.isStatic = true;
SuperBuilder annInstance = annotation.getInstance();
job.init(annotation, annInstance, annotationNode);
boolean generateBuilderMethod;
if (job.builderMethodName.isEmpty()) {
generateBuilderMethod = false;
} else if (!checkName("builderMethodName", job.builderMethodName, annotationNode)) {
return;
} else {
generateBuilderMethod = true;
}
if (!checkName("buildMethodName", job.buildMethodName, annotationNode)) return;
// Do not delete the SuperBuilder annotation here, we need it for @Jacksonized.
JavacNode parent = annotationNode.up();
job.builderFields = new ArrayList<BuilderFieldData>();
job.typeParams = List.nil();
List<JCExpression> buildMethodThrownExceptions = List.nil();
List<JCExpression> superclassTypeParams = List.nil();
boolean addCleaning = false;
if (!isClass(parent)) {
annotationNode.addError("@SuperBuilder is only supported on classes.");
return;
}
if (!isStaticAllowed(parent)) {
annotationNode.addError("@SuperBuilder is not supported on non-static nested classes.");
return;
}
job.parentType = parent;
JCClassDecl td = (JCClassDecl) parent.get();
// Gather all fields of the class that should be set by the builder.
ArrayList<JavacNode> nonFinalNonDefaultedFields = null;
boolean valuePresent = (hasAnnotation(lombok.Value.class, parent) || hasAnnotation("lombok.experimental.Value", parent));
for (JavacNode fieldNode : HandleConstructor.findAllFields(parent, true)) {
JCVariableDecl fd = (JCVariableDecl) fieldNode.get();
JavacNode isDefault = findAnnotation(Builder.Default.class, fieldNode, false);
boolean isFinal = (fd.mods.flags & Flags.FINAL) != 0 || (valuePresent && !hasAnnotation(NonFinal.class, fieldNode));
BuilderFieldData bfd = new BuilderFieldData();
bfd.rawName = fd.name;
bfd.name = removePrefixFromField(fieldNode);
bfd.builderFieldName = bfd.name;
bfd.annotations = findCopyableAnnotations(fieldNode);
bfd.type = fd.vartype;
bfd.singularData = getSingularData(fieldNode, annInstance.setterPrefix());
bfd.originalFieldNode = fieldNode;
if (bfd.singularData != null && isDefault != null) {
isDefault.addError("@Builder.Default and @Singular cannot be mixed.");
findAnnotation(Builder.Default.class, fieldNode, true);
isDefault = null;
}
if (fd.init == null && isDefault != null) {
isDefault.addWarning("@Builder.Default requires an initializing expression (' = something;').");
findAnnotation(Builder.Default.class, fieldNode, true);
isDefault = null;
}
if (fd.init != null && isDefault == null) {
if (isFinal) continue;
if (nonFinalNonDefaultedFields == null) nonFinalNonDefaultedFields = new ArrayList<JavacNode>();
nonFinalNonDefaultedFields.add(fieldNode);
}
if (isDefault != null) {
bfd.nameOfDefaultProvider = parent.toName(DEFAULT_PREFIX + bfd.name);
bfd.nameOfSetFlag = parent.toName(bfd.name + SET_PREFIX);
bfd.builderFieldName = parent.toName(bfd.name + VALUE_PREFIX);
JCMethodDecl md = HandleBuilder.generateDefaultProvider(bfd.nameOfDefaultProvider, fieldNode, td.typarams, job);
if (md != null) injectMethod(parent, md);
}
addObtainVia(bfd, fieldNode);
job.builderFields.add(bfd);
}
job.typeParams = job.builderTypeParams = td.typarams;
job.builderClassName = job.replaceBuilderClassName(td.name);
if (!checkName("builderClassName", job.builderClassName, annotationNode)) return;
// <C, B> are the generics for our builder.
String classGenericName = "C";
String builderGenericName = "B";
// We have to make sure that the generics' names do not collide with any generics on the annotated class,
// the classname itself, or any member type name of the annotated class.
// For instance, if there are generics <B, B2, C> on the annotated class, use "C2" and "B3" for our builder.
java.util.HashSet<String> usedNames = gatherUsedTypeNames(job.typeParams, td);
classGenericName = generateNonclashingNameFor(classGenericName, usedNames);
builderGenericName = generateNonclashingNameFor(builderGenericName, usedNames);
JavacTreeMaker maker = annotationNode.getTreeMaker();
{
JCExpression annotatedClass = namePlusTypeParamsToTypeReference(maker, parent, job.typeParams);
JCTypeParameter c = maker.TypeParameter(parent.toName(classGenericName), List.<JCExpression>of(annotatedClass));
ListBuffer<JCExpression> typeParamsForBuilder = getTypeParamExpressions(job.typeParams, maker, job.sourceNode);
typeParamsForBuilder.append(maker.Ident(parent.toName(classGenericName)));
typeParamsForBuilder.append(maker.Ident(parent.toName(builderGenericName)));
JCTypeApply typeApply = maker.TypeApply(namePlusTypeParamsToTypeReference(maker, parent, job.getBuilderClassName(), false, List.<JCTypeParameter>nil()), typeParamsForBuilder.toList());
JCTypeParameter d = maker.TypeParameter(parent.toName(builderGenericName), List.<JCExpression>of(typeApply));
if (job.typeParams == null || job.typeParams.isEmpty()) {
job.builderTypeParams_ = List.of(c, d);
} else {
job.builderTypeParams_ = job.typeParams.append(c).append(d);
}
}
JCTree extendsClause = Javac.getExtendsClause(td);
JCExpression superclassBuilderClass = null;
if (extendsClause instanceof JCTypeApply) {
// Remember the type arguments, because we need them for the extends clause of our abstract builder class.
superclassTypeParams = ((JCTypeApply) extendsClause).getTypeArguments();
// A class name with a generics type, e.g., "Superclass<A>".
extendsClause = ((JCTypeApply) extendsClause).getType();
}
if (extendsClause instanceof JCFieldAccess) {
Name superclassName = ((JCFieldAccess) extendsClause).getIdentifier();
String builderClassNameTemplate = BuilderJob.getBuilderClassNameTemplate(annotationNode, null);
String superclassBuilderClassName = job.replaceBuilderClassName(superclassName.toString(), builderClassNameTemplate);
superclassBuilderClass = parent.getTreeMaker().Select((JCFieldAccess) extendsClause, parent.toName(superclassBuilderClassName));
} else if (extendsClause != null) {
String builderClassNameTemplate = BuilderJob.getBuilderClassNameTemplate(annotationNode, null);
String superclassBuilderClassName = job.replaceBuilderClassName(extendsClause.toString(), builderClassNameTemplate);
superclassBuilderClass = chainDots(parent, extendsClause.toString(), superclassBuilderClassName);
}
// Check validity of @ObtainVia fields, and add check if adding cleaning for @Singular is necessary.
for (BuilderFieldData bfd : job.builderFields) {
if (bfd.singularData != null && bfd.singularData.getSingularizer() != null) {
if (bfd.singularData.getSingularizer().requiresCleaning()) {
addCleaning = true;
break;
}
}
if (bfd.obtainVia != null) {
if (bfd.obtainVia.field().isEmpty() == bfd.obtainVia.method().isEmpty()) {
bfd.obtainViaNode.addError("The syntax is either @ObtainVia(field = \"fieldName\") or @ObtainVia(method = \"methodName\").");
return;
}
if (bfd.obtainVia.method().isEmpty() && bfd.obtainVia.isStatic()) {
bfd.obtainViaNode.addError("@ObtainVia(isStatic = true) is not valid unless 'method' has been set.");
return;
}
}
}
job.builderAbstractClassName = job.builderClassName = job.replaceBuilderClassName(td.name);
job.builderImplClassName = job.builderAbstractClassName + "Impl";
// Create the abstract builder class.
job.builderAbstractType = findInnerClass(parent, job.builderClassName);
if (job.builderAbstractType == null) {
job.builderAbstractType = generateBuilderAbstractClass(job, superclassBuilderClass, superclassTypeParams, classGenericName, builderGenericName);
recursiveSetGeneratedBy(job.builderAbstractType.get(), annotationNode);
} else {
JCClassDecl builderTypeDeclaration = (JCClassDecl) job.builderAbstractType.get();
if (!builderTypeDeclaration.getModifiers().getFlags().contains(Modifier.STATIC)
|| !builderTypeDeclaration.getModifiers().getFlags().contains(Modifier.ABSTRACT)) {
annotationNode.addError("Existing Builder must be an abstract static inner class.");
return;
}
sanityCheckForMethodGeneratingAnnotationsOnBuilderClass(job.builderAbstractType, annotationNode);
// Generate errors for @Singular BFDs that have one already defined node.
for (BuilderFieldData bfd : job.builderFields) {
SingularData sd = bfd.singularData;
if (sd == null) continue;
JavacSingularizer singularizer = sd.getSingularizer();
if (singularizer == null) continue;
if (singularizer.checkForAlreadyExistingNodesAndGenerateError(job.builderAbstractType, sd)) {
bfd.singularData = null;
}
}
}
// Generate the fields in the abstract builder class that hold the values for the instance.
job.setBuilderToAbstract();
generateBuilderFields(job.builderType, job.builderFields, annotationNode);
if (addCleaning) {
JCVariableDecl uncleanField = maker.VarDef(maker.Modifiers(Flags.PRIVATE), job.toName("$lombokUnclean"), maker.TypeIdent(CTC_BOOLEAN), null);
recursiveSetGeneratedBy(uncleanField, annotationNode);
injectFieldAndMarkGenerated(job.builderType, uncleanField);
}
if (job.toBuilder) {
// Generate $fillValuesFrom() method in the abstract builder.
JCMethodDecl fvm = generateFillValuesMethod(job, superclassBuilderClass != null, builderGenericName, classGenericName);
recursiveSetGeneratedBy(fvm, annotationNode);
injectMethod(job.builderType, fvm);
// Generate $fillValuesFromInstanceIntoBuilder() method in the builder implementation class.
JCMethodDecl sfvm = generateStaticFillValuesMethod(job, annInstance.setterPrefix());
recursiveSetGeneratedBy(sfvm, annotationNode);
injectMethod(job.builderType, sfvm);
}
// Generate abstract self() and build() methods in the abstract builder.
JCMethodDecl asm = generateAbstractSelfMethod(job, superclassBuilderClass != null, builderGenericName);
recursiveSetGeneratedBy(asm, annotationNode);
injectMethod(job.builderType, asm);
JCMethodDecl abm = generateAbstractBuildMethod(job, superclassBuilderClass != null, classGenericName);
recursiveSetGeneratedBy(abm, annotationNode);
injectMethod(job.builderType, abm);
// Create the setter methods in the abstract builder.
for (BuilderFieldData bfd : job.builderFields) {
generateSetterMethodsForBuilder(job, bfd, builderGenericName, annInstance.setterPrefix());
}
// Create the toString() method for the abstract builder.
java.util.List<Included<JavacNode, ToString.Include>> fieldNodes = new ArrayList<Included<JavacNode, ToString.Include>>();
for (BuilderFieldData bfd : job.builderFields) {
for (JavacNode f : bfd.createdFields) {
fieldNodes.add(new Included<JavacNode, ToString.Include>(f, null, true, false));
}
}
// Let toString() call super.toString() if there is a superclass, so that it also shows fields from the superclass' builder.
JCMethodDecl toStringMethod = HandleToString.createToString(job.builderType, fieldNodes, true, superclassBuilderClass != null, FieldAccess.ALWAYS_FIELD, annotationNode);
if (toStringMethod != null) injectMethod(job.builderType, toStringMethod);
// If clean methods are requested, add them now.
if (addCleaning) {
JCMethodDecl md = generateCleanMethod(job.builderFields, job.builderType, annotationNode);
recursiveSetGeneratedBy(md, annotationNode);
injectMethod(job.builderType, md);
}
boolean isAbstract = (td.mods.flags & Flags.ABSTRACT) != 0;
if (!isAbstract) {
// Only non-abstract classes get the Builder implementation.
// Create the builder implementation class.
job.builderImplType = findInnerClass(parent, job.builderImplClassName);
if (job.builderImplType == null) {
job.builderImplType = generateBuilderImplClass(job);
recursiveSetGeneratedBy(job.builderImplType.get(), annotationNode);
} else {
JCClassDecl builderImplTypeDeclaration = (JCClassDecl) job.builderImplType.get();
if (!builderImplTypeDeclaration.getModifiers().getFlags().contains(Modifier.STATIC)
|| builderImplTypeDeclaration.getModifiers().getFlags().contains(Modifier.ABSTRACT)) {
annotationNode.addError("Existing BuilderImpl must be a non-abstract static inner class.");
return;
}
sanityCheckForMethodGeneratingAnnotationsOnBuilderClass(job.builderImplType, annotationNode);
}
// Create a simple constructor for the BuilderImpl class.
JCMethodDecl cd = HandleConstructor.createConstructor(AccessLevel.PRIVATE, List.<JCAnnotation>nil(), job.builderImplType, List.<JavacNode>nil(), false, annotationNode);
if (cd != null) injectMethod(job.builderImplType, cd);
job.setBuilderToImpl();
// Create the self() and build() methods in the BuilderImpl.
JCMethodDecl selfMethod = generateSelfMethod(job);
recursiveSetGeneratedBy(selfMethod, annotationNode);
injectMethod(job.builderType, selfMethod);
if (methodExists(job.buildMethodName, job.builderType, -1) == MemberExistsResult.NOT_EXISTS) {
JCMethodDecl buildMethod = generateBuildMethod(job, buildMethodThrownExceptions);
recursiveSetGeneratedBy(buildMethod, annotationNode);
injectMethod(job.builderType, buildMethod);
}
}
// Generate a constructor in the annotated class that takes a builder as argument.
if (!constructorExists(job.parentType, job.builderAbstractClassName)) {
job.setBuilderToAbstract();
generateBuilderBasedConstructor(job, superclassBuilderClass != null);
}
if (!isAbstract) {
// Only non-abstract classes get the builder() and toBuilder() methods.
// Add the builder() method to the annotated class.
// Allow users to specify their own builder() methods, e.g., to provide default values.
if (generateBuilderMethod && methodExists(job.builderMethodName, job.parentType, -1) != MemberExistsResult.NOT_EXISTS) generateBuilderMethod = false;
if (generateBuilderMethod) {
JCMethodDecl builderMethod = generateBuilderMethod(job);
if (builderMethod != null) {
recursiveSetGeneratedBy(builderMethod, annotationNode);
injectMethod(job.parentType, builderMethod);
}
}
// Add the toBuilder() method to the annotated class.
if (job.toBuilder) {
switch (methodExists(TO_BUILDER_METHOD_NAME, job.parentType, 0)) {
case EXISTS_BY_USER:
break;
case NOT_EXISTS:
JCMethodDecl md = generateToBuilderMethod(job);
if (md != null) {
recursiveSetGeneratedBy(md, annotationNode);
injectMethod(job.parentType, md);
}
break;
default:
// Should not happen.
}
}
}
if (nonFinalNonDefaultedFields != null && generateBuilderMethod) {
for (JavacNode fieldNode : nonFinalNonDefaultedFields) {
fieldNode.addWarning("@SuperBuilder will ignore the initializing expression entirely. If you want the initializing expression to serve as default, add @Builder.Default. If it is not supposed to be settable during building, make the field final.");
}
}
}
/**
* Creates and returns the abstract builder class and injects it into the annotated class.
*/
private JavacNode generateBuilderAbstractClass(SuperBuilderJob job, JCExpression superclassBuilderClass, List<JCExpression> superclassTypeParams, String classGenericName, String builderGenericName) {
JavacTreeMaker maker = job.parentType.getTreeMaker();
JCModifiers mods = maker.Modifiers(Flags.STATIC | Flags.ABSTRACT | Flags.PUBLIC);
// Keep any type params of the annotated class.
ListBuffer<JCTypeParameter> allTypeParams = new ListBuffer<JCTypeParameter>();
allTypeParams.appendList(copyTypeParams(job.sourceNode, job.typeParams));
// Add builder-specific type params required for inheritable builders.
// 1. The return type for the build() method, named "C", which extends the annotated class.
JCExpression annotatedClass = namePlusTypeParamsToTypeReference(maker, job.parentType, job.typeParams);
allTypeParams.append(maker.TypeParameter(job.toName(classGenericName), List.<JCExpression>of(annotatedClass)));
// 2. The return type for all setter methods, named "B", which extends this builder class.
Name builderClassName = job.toName(job.builderClassName);
ListBuffer<JCExpression> typeParamsForBuilder = getTypeParamExpressions(job.typeParams, maker, job.sourceNode);
typeParamsForBuilder.append(maker.Ident(job.toName(classGenericName)));
typeParamsForBuilder.append(maker.Ident(job.toName(builderGenericName)));
JCTypeApply typeApply = maker.TypeApply(namePlusTypeParamsToTypeReference(maker, job.parentType, builderClassName, false, List.<JCTypeParameter>nil()), typeParamsForBuilder.toList());
allTypeParams.append(maker.TypeParameter(job.toName(builderGenericName), List.<JCExpression>of(typeApply)));
JCExpression extending = null;
if (superclassBuilderClass != null) {
// If the annotated class extends another class, we want this builder to extend the builder of the superclass.
// 1. Add the type parameters of the superclass.
typeParamsForBuilder = getTypeParamExpressions(superclassTypeParams, maker, job.sourceNode);
// 2. Add the builder type params <C, B>.
typeParamsForBuilder.append(maker.Ident(job.toName(classGenericName)));
typeParamsForBuilder.append(maker.Ident(job.toName(builderGenericName)));
extending = maker.TypeApply(superclassBuilderClass, typeParamsForBuilder.toList());
}
JCClassDecl builder = maker.ClassDef(mods, builderClassName, allTypeParams.toList(), extending, List.<JCExpression>nil(), List.<JCTree>nil());
recursiveSetGeneratedBy(builder, job.sourceNode);
return injectType(job.parentType, builder);
}
/**
* Creates and returns the concrete builder implementation class and injects it into the annotated class.
*/
private JavacNode generateBuilderImplClass(SuperBuilderJob job) {
JavacTreeMaker maker = job.getTreeMaker();
JCModifiers mods = maker.Modifiers(Flags.STATIC | Flags.PRIVATE | Flags.FINAL);
// Extend the abstract builder.
JCExpression extending = namePlusTypeParamsToTypeReference(maker, job.parentType, job.toName(job.builderAbstractClassName), false, List.<JCTypeParameter>nil());
// Add builder-specific type params required for inheritable builders.
// 1. The return type for the build() method (named "C" in the abstract builder), which is the annotated class.
JCExpression annotatedClass = namePlusTypeParamsToTypeReference(maker, job.parentType, job.typeParams);
// 2. The return type for all setter methods (named "B" in the abstract builder), which is this builder class.
JCExpression builderImplClassExpression = namePlusTypeParamsToTypeReference(maker, job.parentType, job.toName(job.builderImplClassName), false, job.typeParams);
ListBuffer<JCExpression> typeParamsForBuilder = getTypeParamExpressions(job.typeParams, maker, job.sourceNode);
typeParamsForBuilder.append(annotatedClass);
typeParamsForBuilder.append(builderImplClassExpression);
extending = maker.TypeApply(extending, typeParamsForBuilder.toList());
JCClassDecl builder = maker.ClassDef(mods, job.toName(job.builderImplClassName), copyTypeParams(job.parentType, job.typeParams), extending, List.<JCExpression>nil(), List.<JCTree>nil());
recursiveSetGeneratedBy(builder, job.sourceNode);
return injectType(job.parentType, builder);
}
/**
* Generates a constructor that has a builder as the only parameter.
* The values from the builder are used to initialize the fields of new instances.
*
* @param callBuilderBasedSuperConstructor
* If {@code true}, the constructor will explicitly call a super
* constructor with the builder as argument. Requires
* {@code builderClassAsParameter != null}.
*/
private void generateBuilderBasedConstructor(SuperBuilderJob job, boolean callBuilderBasedSuperConstructor) {
JavacTreeMaker maker = job.getTreeMaker();
AccessLevel level = AccessLevel.PROTECTED;
ListBuffer<JCStatement> statements = new ListBuffer<JCStatement>();
Name builderVariableName = job.toName(BUILDER_VARIABLE_NAME);
for (BuilderFieldData bfd : job.builderFields) {
JCExpression rhs;
if (bfd.singularData != null && bfd.singularData.getSingularizer() != null) {
bfd.singularData.getSingularizer().appendBuildCode(bfd.singularData, bfd.originalFieldNode, job.sourceNode, statements, bfd.builderFieldName, "b");
rhs = maker.Ident(bfd.singularData.getPluralName());
} else {
rhs = maker.Select(maker.Ident(builderVariableName), bfd.builderFieldName);
}
JCFieldAccess fieldInThis = maker.Select(maker.Ident(job.toName("this")), bfd.rawName);
JCStatement assign = maker.Exec(maker.Assign(fieldInThis, rhs));
// In case of @Builder.Default, set the value to the default if it was not set in the builder.
if (bfd.nameOfSetFlag != null) {
JCFieldAccess setField = maker.Select(maker.Ident(builderVariableName), bfd.nameOfSetFlag);
fieldInThis = maker.Select(maker.Ident(job.toName("this")), bfd.rawName);
JCExpression parentTypeRef = namePlusTypeParamsToTypeReference(maker, job.parentType, List.<JCTypeParameter>nil());
JCAssign assignDefault = maker.Assign(fieldInThis, maker.Apply(typeParameterNames(maker, ((JCClassDecl) job.parentType.get()).typarams), maker.Select(parentTypeRef, bfd.nameOfDefaultProvider), List.<JCExpression>nil()));
statements.append(maker.If(setField, assign, maker.Exec(assignDefault)));
} else {
statements.append(assign);
}
if (hasNonNullAnnotations(bfd.originalFieldNode)) {
JCStatement nullCheck = generateNullCheck(maker, bfd.originalFieldNode, job.sourceNode);
if (nullCheck != null) statements.append(nullCheck);
}
}
List<JCAnnotation> annsOnMethod = job.checkerFramework.generateSideEffectFree() ? List.of(maker.Annotation(genTypeRef(job.parentType, CheckerFrameworkVersion.NAME__SIDE_EFFECT_FREE), List.<JCExpression>nil())) : List.<JCAnnotation>nil();
JCModifiers mods = maker.Modifiers(toJavacModifier(level), annsOnMethod);
// Create a constructor that has just the builder as parameter.
ListBuffer<JCVariableDecl> params = new ListBuffer<JCVariableDecl>();
long flags = JavacHandlerUtil.addFinalIfNeeded(Flags.PARAMETER, job.getContext());
// First add all generics that are present on the parent type.
ListBuffer<JCExpression> typeParamsForBuilderParameter = getTypeParamExpressions(job.typeParams, maker, job.sourceNode);
// Now add the <?, ?>.
JCWildcard wildcard = maker.Wildcard(maker.TypeBoundKind(BoundKind.UNBOUND), null);
typeParamsForBuilderParameter.append(wildcard);
wildcard = maker.Wildcard(maker.TypeBoundKind(BoundKind.UNBOUND), null);
typeParamsForBuilderParameter.append(wildcard);
JCTypeApply paramType = maker.TypeApply(namePlusTypeParamsToTypeReference(maker, job.parentType, job.getBuilderClassName(), false, List.<JCTypeParameter>nil()), typeParamsForBuilderParameter.toList());
JCVariableDecl param = maker.VarDef(maker.Modifiers(flags), builderVariableName, paramType, null);
params.append(param);
if (callBuilderBasedSuperConstructor) {
// The first statement must be the call to the super constructor.
JCMethodInvocation callToSuperConstructor = maker.Apply(List.<JCExpression>nil(),
maker.Ident(job.toName("super")),
List.<JCExpression>of(maker.Ident(builderVariableName)));
statements.prepend(maker.Exec(callToSuperConstructor));
}
JCMethodDecl constr = recursiveSetGeneratedBy(maker.MethodDef(mods, job.toName("<init>"),
null, List.<JCTypeParameter>nil(), params.toList(), List.<JCExpression>nil(),
maker.Block(0L, statements.toList()), null), job.sourceNode);
injectMethod(job.parentType, constr);
}
private JCMethodDecl generateBuilderMethod(SuperBuilderJob job) {
JavacTreeMaker maker = job.getTreeMaker();
JCExpression call = maker.NewClass(null, List.<JCExpression>nil(), namePlusTypeParamsToTypeReference(maker, job.parentType, job.toName(job.builderImplClassName), false, job.typeParams), List.<JCExpression>nil(), null);
JCStatement statement = maker.Return(call);
JCBlock body = maker.Block(0, List.<JCStatement>of(statement));
int modifiers = Flags.PUBLIC;
modifiers |= Flags.STATIC;
// Add any type params of the annotated class to the return type.
ListBuffer<JCExpression> typeParameterNames = new ListBuffer<JCExpression>();
typeParameterNames.appendList(typeParameterNames(maker, job.typeParams));
// Now add the <?, ?>.
JCWildcard wildcard = maker.Wildcard(maker.TypeBoundKind(BoundKind.UNBOUND), null);
typeParameterNames.append(wildcard);
typeParameterNames.append(wildcard);
// And return type annotations.
List<JCAnnotation> annsOnParamType = List.nil();
if (job.checkerFramework.generateUnique()) annsOnParamType = List.of(maker.Annotation(genTypeRef(job.parentType, CheckerFrameworkVersion.NAME__UNIQUE), List.<JCExpression>nil()));
JCTypeApply returnType = maker.TypeApply(namePlusTypeParamsToTypeReference(maker, job.parentType, job.toName(job.builderAbstractClassName), false, List.<JCTypeParameter>nil(), annsOnParamType), typeParameterNames.toList());
List<JCAnnotation> annsOnMethod = job.checkerFramework.generateSideEffectFree() ? List.of(maker.Annotation(genTypeRef(job.parentType, CheckerFrameworkVersion.NAME__SIDE_EFFECT_FREE), List.<JCExpression>nil())) : List.<JCAnnotation>nil();
JCMethodDecl methodDef = maker.MethodDef(maker.Modifiers(modifiers, annsOnMethod), job.toName(job.builderMethodName), returnType, copyTypeParams(job.sourceNode, job.typeParams), List.<JCVariableDecl>nil(), List.<JCExpression>nil(), body, null);
createRelevantNonNullAnnotation(job.parentType, methodDef);
return methodDef;
}
/**
* Generates a <code>toBuilder()</code> method in the annotated class that looks like this:
* <pre>
* public ParentBuilder<?, ?> toBuilder() {
* return new <i>Foobar</i>BuilderImpl().$fillValuesFrom(this);
* }
* </pre>
*/
private JCMethodDecl generateToBuilderMethod(SuperBuilderJob job) {
JavacTreeMaker maker = job.getTreeMaker();
JCExpression newClass = maker.NewClass(null, List.<JCExpression>nil(), namePlusTypeParamsToTypeReference(maker, job.parentType, job.toName(job.builderImplClassName), false, job.typeParams), List.<JCExpression>nil(), null);
List<JCExpression> methodArgs = List.<JCExpression>of(maker.Ident(job.toName("this")));
JCMethodInvocation invokeFillMethod = maker.Apply(List.<JCExpression>nil(), maker.Select(newClass, job.toName(FILL_VALUES_METHOD_NAME)), methodArgs);
JCStatement statement = maker.Return(invokeFillMethod);
JCBlock body = maker.Block(0, List.<JCStatement>of(statement));
int modifiers = Flags.PUBLIC;
// Add any type params of the annotated class to the return type.
ListBuffer<JCExpression> typeParameterNames = new ListBuffer<JCExpression>();
typeParameterNames.appendList(typeParameterNames(maker, job.typeParams));
// Now add the <?, ?>.
JCWildcard wildcard = maker.Wildcard(maker.TypeBoundKind(BoundKind.UNBOUND), null);
typeParameterNames.append(wildcard);
typeParameterNames.append(wildcard);
JCTypeApply returnType = maker.TypeApply(namePlusTypeParamsToTypeReference(maker, job.parentType, job.toName(job.builderAbstractClassName), false, List.<JCTypeParameter>nil()), typeParameterNames.toList());
List<JCAnnotation> annsOnMethod = job.checkerFramework.generateSideEffectFree() ? List.of(maker.Annotation(genTypeRef(job.parentType, CheckerFrameworkVersion.NAME__SIDE_EFFECT_FREE), List.<JCExpression>nil())) : List.<JCAnnotation>nil();
JCMethodDecl methodDef = maker.MethodDef(maker.Modifiers(modifiers, annsOnMethod), job.toName(TO_BUILDER_METHOD_NAME), returnType, List.<JCTypeParameter>nil(), List.<JCVariableDecl>nil(), List.<JCExpression>nil(), body, null);
createRelevantNonNullAnnotation(job.parentType, methodDef);
return methodDef;
}
/**
* Generates a <code>$fillValuesFrom()</code> method in the abstract builder class that looks
* like this:
* <pre>
* protected B $fillValuesFrom(final C instance) {
* super.$fillValuesFrom(instance);
* FoobarBuilder.$fillValuesFromInstanceIntoBuilder(instance, this);
* return self();
* }
* </pre>
*/
private JCMethodDecl generateFillValuesMethod(SuperBuilderJob job, boolean inherited, String builderGenericName, String classGenericName) {
JavacTreeMaker maker = job.getTreeMaker();
List<JCAnnotation> annotations = List.nil();
if (inherited) {
JCAnnotation overrideAnnotation = maker.Annotation(genJavaLangTypeRef(job.builderType, "Override"), List.<JCExpression>nil());
annotations = List.of(overrideAnnotation);
}
JCModifiers modifiers = maker.Modifiers(Flags.PROTECTED, annotations);
Name name = job.toName(FILL_VALUES_METHOD_NAME);
JCExpression returnType = maker.Ident(job.toName(builderGenericName));
JCExpression classGenericNameExpr = maker.Ident(job.toName(classGenericName));
JCVariableDecl param = maker.VarDef(maker.Modifiers(Flags.PARAMETER | Flags.FINAL), job.toName(INSTANCE_VARIABLE_NAME), classGenericNameExpr, null);
ListBuffer<JCStatement> body = new ListBuffer<JCStatement>();
if (inherited) {
// Call super.
JCMethodInvocation callToSuper = maker.Apply(List.<JCExpression>nil(),
maker.Select(maker.Ident(job.toName("super")), name),
List.<JCExpression>of(maker.Ident(job.toName(INSTANCE_VARIABLE_NAME))));
body.append(maker.Exec(callToSuper));
}
// Call the builder implemention's helper method that actually fills the values from the instance.
JCExpression ref = namePlusTypeParamsToTypeReference(maker, job.parentType, job.getBuilderClassName(), false, List.<JCTypeParameter>nil());
JCMethodInvocation callStaticFillValuesMethod = maker.Apply(List.<JCExpression>nil(),
maker.Select(ref, job.toName(STATIC_FILL_VALUES_METHOD_NAME)),
List.<JCExpression>of(maker.Ident(job.toName(INSTANCE_VARIABLE_NAME)), maker.Ident(job.toName("this"))));
body.append(maker.Exec(callStaticFillValuesMethod));
JCReturn returnStatement = maker.Return(maker.Apply(List.<JCExpression>nil(), maker.Ident(job.toName(SELF_METHOD)), List.<JCExpression>nil()));
body.append(returnStatement);
JCBlock bodyBlock = maker.Block(0, body.toList());
return maker.MethodDef(modifiers, name, returnType, List.<JCTypeParameter>nil(), List.of(param), List.<JCExpression>nil(), bodyBlock, null);
}
/**
* Generates a <code>$fillValuesFromInstanceIntoBuilder()</code> method in
* the builder implementation class that copies all fields from the instance
* to the builder. It looks like this:
*
* <pre>
* protected B $fillValuesFromInstanceIntoBuilder(Foobar instance, FoobarBuilder<?, ?> b) {
* b.field(instance.field);
* }
* </pre>
*/
private JCMethodDecl generateStaticFillValuesMethod(SuperBuilderJob job, String setterPrefix) {
JavacTreeMaker maker = job.getTreeMaker();
List<JCAnnotation> annotations = List.nil();
JCModifiers modifiers = maker.Modifiers(Flags.PRIVATE | Flags.STATIC, annotations);
Name name = job.toName(STATIC_FILL_VALUES_METHOD_NAME);
JCExpression returnType = maker.TypeIdent(CTC_VOID);
// 1st parameter: "Foobar instance"
JCVariableDecl paramInstance = maker.VarDef(maker.Modifiers(Flags.PARAMETER | Flags.FINAL), job.toName(INSTANCE_VARIABLE_NAME), cloneSelfType(job.parentType), null);
// 2nd parameter: "FoobarBuilder<?, ?> b" (plus generics on the annotated type)
// First add all generics that are present on the parent type.
ListBuffer<JCExpression> typeParamsForBuilderParameter = getTypeParamExpressions(job.typeParams, maker, job.sourceNode);
// Now add the <?, ?>.
JCWildcard wildcard = maker.Wildcard(maker.TypeBoundKind(BoundKind.UNBOUND), null);
typeParamsForBuilderParameter.append(wildcard);
wildcard = maker.Wildcard(maker.TypeBoundKind(BoundKind.UNBOUND), null);
typeParamsForBuilderParameter.append(wildcard);
JCTypeApply builderType = maker.TypeApply(namePlusTypeParamsToTypeReference(maker, job.parentType, job.getBuilderClassName(), false, List.<JCTypeParameter>nil()), typeParamsForBuilderParameter.toList());
JCVariableDecl paramBuilder = maker.VarDef(maker.Modifiers(Flags.PARAMETER | Flags.FINAL), job.toName(BUILDER_VARIABLE_NAME), builderType, null);
ListBuffer<JCStatement> body = new ListBuffer<JCStatement>();
// Call the builder's setter methods to fill the values from the instance.
for (BuilderFieldData bfd : job.builderFields) {
JCExpressionStatement exec = createSetterCallWithInstanceValue(bfd, job, setterPrefix);
body.append(exec);
}
JCBlock bodyBlock = maker.Block(0, body.toList());
return maker.MethodDef(modifiers, name, returnType, copyTypeParams(job.builderType, job.typeParams), List.of(paramInstance, paramBuilder), List.<JCExpression>nil(), bodyBlock, null);
}
private JCExpressionStatement createSetterCallWithInstanceValue(BuilderFieldData bfd, SuperBuilderJob job, String setterPrefix) {
JavacTreeMaker maker = job.getTreeMaker();
JCExpression[] tgt = new JCExpression[bfd.singularData == null ? 1 : 2];
if (bfd.obtainVia == null || !bfd.obtainVia.field().isEmpty()) {
for (int i = 0; i < tgt.length; i++) {
tgt[i] = maker.Select(maker.Ident(job.toName(INSTANCE_VARIABLE_NAME)), bfd.obtainVia == null ? bfd.rawName : job.toName(bfd.obtainVia.field()));
}
} else {
if (bfd.obtainVia.isStatic()) {
for (int i = 0; i < tgt.length; i++) {
JCExpression typeRef = namePlusTypeParamsToTypeReference(maker, job.parentType, List.<JCTypeParameter>nil());
JCExpression c = maker.Select(typeRef, job.toName(bfd.obtainVia.method()));
tgt[i] = maker.Apply(List.<JCExpression>nil(), c, List.<JCExpression>of(maker.Ident(job.toName(INSTANCE_VARIABLE_NAME))));
}
} else {
for (int i = 0; i < tgt.length; i++) {
JCExpression c = maker.Select(maker.Ident(job.toName(INSTANCE_VARIABLE_NAME)), job.toName(bfd.obtainVia.method()));
tgt[i] = maker.Apply(List.<JCExpression>nil(), c, List.<JCExpression>nil());
}
}
}
JCExpression arg;
if (bfd.singularData == null) {
arg = tgt[0];
} else {
JCExpression eqNull = maker.Binary(CTC_EQUAL, tgt[0], maker.Literal(CTC_BOT, null));
JCExpression emptyCollection = bfd.singularData.getSingularizer().getEmptyExpression(bfd.singularData.getTargetFqn(), maker, bfd.singularData, job.parentType, job.sourceNode);
arg = maker.Conditional(eqNull, emptyCollection, tgt[1]);
}
String setterName = HandlerUtil.buildAccessorName(job.sourceNode, setterPrefix, bfd.name.toString());
JCMethodInvocation apply = maker.Apply(List.<JCExpression>nil(), maker.Select(maker.Ident(job.toName(BUILDER_VARIABLE_NAME)), job.toName(setterName)), List.of(arg));
JCExpressionStatement exec = maker.Exec(apply);
return exec;
}
private JCMethodDecl generateAbstractSelfMethod(SuperBuilderJob job, boolean override, String builderGenericName) {
JavacTreeMaker maker = job.getTreeMaker();
List<JCAnnotation> annotations = List.nil();
JCAnnotation overrideAnnotation = override ? maker.Annotation(genJavaLangTypeRef(job.builderType, "Override"), List.<JCExpression>nil()) : null;
JCAnnotation sefAnnotation = job.checkerFramework.generatePure() ? maker.Annotation(genTypeRef(job.builderType, CheckerFrameworkVersion.NAME__PURE), List.<JCExpression>nil()) : null;
if (sefAnnotation != null) annotations = annotations.prepend(sefAnnotation);
if (overrideAnnotation != null) annotations = annotations.prepend(overrideAnnotation);
JCModifiers modifiers = maker.Modifiers(Flags.PROTECTED | Flags.ABSTRACT, annotations);
Name name = job.toName(SELF_METHOD);
JCExpression returnType = maker.Ident(job.toName(builderGenericName));
returnType = addCheckerFrameworkReturnsReceiver(returnType, maker, job.builderType, job.checkerFramework);
return maker.MethodDef(modifiers, name, returnType, List.<JCTypeParameter>nil(), List.<JCVariableDecl>nil(), List.<JCExpression>nil(), null, null);
}
private JCMethodDecl generateSelfMethod(SuperBuilderJob job) {
JavacTreeMaker maker = job.getTreeMaker();
JCAnnotation overrideAnnotation = maker.Annotation(genJavaLangTypeRef(job.builderType, "Override"), List.<JCExpression>nil());
JCAnnotation sefAnnotation = job.checkerFramework.generatePure() ? maker.Annotation(genTypeRef(job.builderType, CheckerFrameworkVersion.NAME__PURE), List.<JCExpression>nil()) : null;
List<JCAnnotation> annsOnMethod = List.nil();
if (sefAnnotation != null) annsOnMethod = annsOnMethod.prepend(sefAnnotation);
annsOnMethod = annsOnMethod.prepend(overrideAnnotation);
JCModifiers modifiers = maker.Modifiers(Flags.PROTECTED, annsOnMethod);
Name name = job.toName(SELF_METHOD);
JCExpression returnType = namePlusTypeParamsToTypeReference(maker, job.builderType.up(), job.getBuilderClassName(), false, job.typeParams);
returnType = addCheckerFrameworkReturnsReceiver(returnType, maker, job.builderType, job.checkerFramework);
JCStatement statement = maker.Return(maker.Ident(job.toName("this")));
JCBlock body = maker.Block(0, List.<JCStatement>of(statement));
return maker.MethodDef(modifiers, name, returnType, List.<JCTypeParameter>nil(), List.<JCVariableDecl>nil(), List.<JCExpression>nil(), body, null);
}
private JCMethodDecl generateAbstractBuildMethod(SuperBuilderJob job, boolean override, String classGenericName) {
JavacTreeMaker maker = job.getTreeMaker();
List<JCAnnotation> annotations = List.nil();
if (override) {
JCAnnotation overrideAnnotation = maker.Annotation(genJavaLangTypeRef(job.builderType, "Override"), List.<JCExpression>nil());
annotations = List.of(overrideAnnotation);
}
if (job.checkerFramework.generateSideEffectFree()) annotations = annotations.prepend(maker.Annotation(genTypeRef(job.builderType, CheckerFrameworkVersion.NAME__SIDE_EFFECT_FREE), List.<JCExpression>nil()));
JCModifiers modifiers = maker.Modifiers(Flags.PUBLIC | Flags.ABSTRACT, annotations);
Name name = job.toName(job.buildMethodName);
JCExpression returnType = maker.Ident(job.toName(classGenericName));
JCVariableDecl recv = HandleBuilder.generateReceiver(job);
JCMethodDecl methodDef;
if (recv != null && maker.hasMethodDefWithRecvParam()) {
methodDef = maker.MethodDefWithRecvParam(modifiers, name, returnType, List.<JCTypeParameter>nil(), recv, List.<JCVariableDecl>nil(), List.<JCExpression>nil(), null, null);
} else {
methodDef = maker.MethodDef(modifiers, name, returnType, List.<JCTypeParameter>nil(), List.<JCVariableDecl>nil(), List.<JCExpression>nil(), null, null);
}
return methodDef;
}
private JCMethodDecl generateBuildMethod(SuperBuilderJob job, List<JCExpression> thrownExceptions) {
JavacTreeMaker maker = job.getTreeMaker();
JCExpression call;
ListBuffer<JCStatement> statements = new ListBuffer<JCStatement>();
// Use a constructor that only has this builder as parameter.
List<JCExpression> builderArg = List.<JCExpression>of(maker.Ident(job.toName("this")));
call = maker.NewClass(null, List.<JCExpression>nil(), cloneSelfType(job.parentType), builderArg, null);
statements.append(maker.Return(call));
JCBlock body = maker.Block(0, statements.toList());
JCAnnotation overrideAnnotation = maker.Annotation(genJavaLangTypeRef(job.builderType, "Override"), List.<JCExpression>nil());
List<JCAnnotation> annsOnMethod = List.of(overrideAnnotation);
if (job.checkerFramework.generateSideEffectFree()) annsOnMethod = annsOnMethod.prepend(maker.Annotation(genTypeRef(job.builderType, CheckerFrameworkVersion.NAME__SIDE_EFFECT_FREE), List.<JCExpression>nil()));
JCModifiers modifiers = maker.Modifiers(Flags.PUBLIC, annsOnMethod);
JCVariableDecl recv = HandleBuilder.generateReceiver(job);
JCMethodDecl methodDef;
if (recv != null && maker.hasMethodDefWithRecvParam()) {
methodDef = maker.MethodDefWithRecvParam(modifiers, job.toName(job.buildMethodName), cloneSelfType(job.parentType), List.<JCTypeParameter>nil(), recv, List.<JCVariableDecl>nil(), thrownExceptions, body, null);
} else {
methodDef = maker.MethodDef(modifiers, job.toName(job.buildMethodName), cloneSelfType(job.parentType), List.<JCTypeParameter>nil(), List.<JCVariableDecl>nil(), thrownExceptions, body, null);
}
createRelevantNonNullAnnotation(job.builderType, methodDef);
return methodDef;
}
private JCMethodDecl generateCleanMethod(java.util.List<BuilderFieldData> builderFields, JavacNode type, JavacNode source) {
JavacTreeMaker maker = type.getTreeMaker();
ListBuffer<JCStatement> statements = new ListBuffer<JCStatement>();
for (BuilderFieldData bfd : builderFields) {
if (bfd.singularData != null && bfd.singularData.getSingularizer() != null) {
bfd.singularData.getSingularizer().appendCleaningCode(bfd.singularData, type, source, statements);
}
}
statements.append(maker.Exec(maker.Assign(maker.Select(maker.Ident(type.toName("this")), type.toName("$lombokUnclean")), maker.Literal(CTC_BOOLEAN, 0))));
JCBlock body = maker.Block(0, statements.toList());
return maker.MethodDef(maker.Modifiers(Flags.PUBLIC), type.toName("$lombokClean"), maker.Type(Javac.createVoidType(type.getSymbolTable(), CTC_VOID)), List.<JCTypeParameter>nil(), List.<JCVariableDecl>nil(), List.<JCExpression>nil(), body, null);
}
private void generateBuilderFields(JavacNode builderType, java.util.List<BuilderFieldData> builderFields, JavacNode source) {
int len = builderFields.size();
java.util.List<JavacNode> existing = new ArrayList<JavacNode>();
for (JavacNode child : builderType.down()) {
if (child.getKind() == Kind.FIELD) existing.add(child);
}
java.util.List<JCVariableDecl> generated = new ArrayList<JCVariableDecl>();
for (int i = len - 1; i >= 0; i--) {
BuilderFieldData bfd = builderFields.get(i);
if (bfd.singularData != null && bfd.singularData.getSingularizer() != null) {
java.util.List<JavacNode> fields = bfd.singularData.getSingularizer().generateFields(bfd.singularData, builderType, source);
for (JavacNode field : fields) {
generated.add((JCVariableDecl) field.get());
}
bfd.createdFields.addAll(fields);
} else {
JavacNode field = null, setFlag = null;
for (JavacNode exists : existing) {
Name n = ((JCVariableDecl) exists.get()).name;
if (n.equals(bfd.builderFieldName)) field = exists;
if (n.equals(bfd.nameOfSetFlag)) setFlag = exists;
}
JavacTreeMaker maker = builderType.getTreeMaker();
if (field == null) {
JCModifiers mods = maker.Modifiers(Flags.PRIVATE);
JCVariableDecl newField = maker.VarDef(mods, bfd.builderFieldName, cloneType(maker, bfd.type, source), null);
field = injectFieldAndMarkGenerated(builderType, newField);
generated.add(newField);
}
if (setFlag == null && bfd.nameOfSetFlag != null) {
JCModifiers mods = maker.Modifiers(Flags.PRIVATE);
JCVariableDecl newField = maker.VarDef(mods, bfd.nameOfSetFlag, maker.TypeIdent(CTC_BOOLEAN), null);
injectFieldAndMarkGenerated(builderType, newField);
generated.add(newField);
}
bfd.createdFields.add(field);
}
}
for (JCVariableDecl gen : generated) recursiveSetGeneratedBy(gen, source);
}
private void generateSetterMethodsForBuilder(final SuperBuilderJob job, BuilderFieldData fieldNode, final String builderGenericName, String setterPrefix) {
boolean deprecate = isFieldDeprecated(fieldNode.originalFieldNode);
final JavacTreeMaker maker = job.getTreeMaker();
ExpressionMaker returnTypeMaker = new ExpressionMaker() { @Override public JCExpression make() {
return maker.Ident(job.toName(builderGenericName));
}};
StatementMaker returnStatementMaker = new StatementMaker() { @Override public JCStatement make() {
return maker.Return(maker.Apply(List.<JCExpression>nil(), maker.Ident(job.toName(SELF_METHOD)), List.<JCExpression>nil()));
}};
if (fieldNode.singularData == null || fieldNode.singularData.getSingularizer() == null) {
generateSimpleSetterMethodForBuilder(job, deprecate, fieldNode.createdFields.get(0), fieldNode.name, fieldNode.nameOfSetFlag, returnTypeMaker.make(), returnStatementMaker.make(), fieldNode.annotations, fieldNode.originalFieldNode, setterPrefix);
} else {
fieldNode.singularData.getSingularizer().generateMethods(job.checkerFramework, fieldNode.singularData, deprecate, job.builderType,
job.sourceNode, true, returnTypeMaker, returnStatementMaker, AccessLevel.PUBLIC);
}
}
private void generateSimpleSetterMethodForBuilder(SuperBuilderJob job, boolean deprecate, JavacNode fieldNode, Name paramName, Name nameOfSetFlag, JCExpression returnType, JCStatement returnStatement, List<JCAnnotation> annosOnParam, JavacNode originalFieldNode, String setterPrefix) {
String setterName = HandlerUtil.buildAccessorName(job.sourceNode, setterPrefix, paramName.toString());
Name setterName_ = job.builderType.toName(setterName);
for (JavacNode child : job.builderType.down()) {
if (child.getKind() != Kind.METHOD) continue;
JCMethodDecl methodDecl = (JCMethodDecl) child.get();
Name existingName = methodDecl.name;
if (existingName.equals(setterName_) && !isTolerate(fieldNode, methodDecl)) return;
}
JavacTreeMaker maker = fieldNode.getTreeMaker();
List<JCAnnotation> methodAnns = JavacHandlerUtil.findCopyableToSetterAnnotations(originalFieldNode);
returnType = addCheckerFrameworkReturnsReceiver(returnType, maker, job.builderType, job.checkerFramework);
JCMethodDecl newMethod = HandleSetter.createSetter(Flags.PUBLIC, deprecate, fieldNode, maker, setterName, paramName, nameOfSetFlag, returnType, returnStatement, job.sourceNode, methodAnns, annosOnParam);
injectMethod(job.builderType, newMethod);
}
private void addObtainVia(BuilderFieldData bfd, JavacNode node) {
for (JavacNode child : node.down()) {
if (!annotationTypeMatches(ObtainVia.class, child)) continue;
AnnotationValues<ObtainVia> ann = createAnnotation(ObtainVia.class, child);
bfd.obtainVia = ann.getInstance();
bfd.obtainViaNode = child;
deleteAnnotationIfNeccessary(child, ObtainVia.class);
return;
}
}
/**
* Returns the explicitly requested singular annotation on this node (field
* or parameter), or null if there's no {@code @Singular} annotation on it.
*
* @param node The node (field or method param) to inspect for its name and potential {@code @Singular} annotation.
* @param setterPrefix the prefix for setter methods
*/
private SingularData getSingularData(JavacNode node, String setterPrefix) {
for (JavacNode child : node.down()) {
if (!annotationTypeMatches(Singular.class, child)) continue;
Name pluralName = node.getKind() == Kind.FIELD ? removePrefixFromField(node) : ((JCVariableDecl) node.get()).name;
AnnotationValues<Singular> ann = createAnnotation(Singular.class, child);
Singular singularInstance = ann.getInstance();
deleteAnnotationIfNeccessary(child, Singular.class);
String explicitSingular = singularInstance.value();
if (explicitSingular.isEmpty()) {
if (Boolean.FALSE.equals(node.getAst().readConfiguration(ConfigurationKeys.SINGULAR_AUTO))) {
node.addError("The singular must be specified explicitly (e.g. @Singular(\"task\")) because auto singularization is disabled.");
explicitSingular = pluralName.toString();
} else {