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/*
* Copyright © 2009-2010 Reinier Zwitserloot and Roel Spilker.
*
* 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.eclipse.handlers;
import static lombok.eclipse.Eclipse.copyAnnotations;
import static lombok.eclipse.Eclipse.copyType;
import static lombok.eclipse.Eclipse.copyTypeParams;
import static lombok.eclipse.handlers.EclipseHandlerUtil.constructorExists;
import static lombok.eclipse.handlers.EclipseHandlerUtil.findAnnotations;
import static lombok.eclipse.handlers.EclipseHandlerUtil.generateNullCheck;
import static lombok.eclipse.handlers.EclipseHandlerUtil.injectMethod;
import static lombok.eclipse.handlers.EclipseHandlerUtil.methodExists;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import lombok.AccessLevel;
import lombok.Data;
import lombok.core.AnnotationValues;
import lombok.core.AST.Kind;
import lombok.core.handlers.TransformationsUtil;
import lombok.eclipse.Eclipse;
import lombok.eclipse.EclipseAnnotationHandler;
import lombok.eclipse.EclipseNode;
import lombok.eclipse.handlers.EclipseHandlerUtil.MemberExistsResult;
import org.eclipse.jdt.internal.compiler.ast.ASTNode;
import org.eclipse.jdt.internal.compiler.ast.AllocationExpression;
import org.eclipse.jdt.internal.compiler.ast.Annotation;
import org.eclipse.jdt.internal.compiler.ast.Argument;
import org.eclipse.jdt.internal.compiler.ast.Assignment;
import org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration;
import org.eclipse.jdt.internal.compiler.ast.ConstructorDeclaration;
import org.eclipse.jdt.internal.compiler.ast.ExplicitConstructorCall;
import org.eclipse.jdt.internal.compiler.ast.Expression;
import org.eclipse.jdt.internal.compiler.ast.FieldDeclaration;
import org.eclipse.jdt.internal.compiler.ast.FieldReference;
import org.eclipse.jdt.internal.compiler.ast.MethodDeclaration;
import org.eclipse.jdt.internal.compiler.ast.ParameterizedSingleTypeReference;
import org.eclipse.jdt.internal.compiler.ast.ReturnStatement;
import org.eclipse.jdt.internal.compiler.ast.SingleNameReference;
import org.eclipse.jdt.internal.compiler.ast.SingleTypeReference;
import org.eclipse.jdt.internal.compiler.ast.Statement;
import org.eclipse.jdt.internal.compiler.ast.ThisReference;
import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.eclipse.jdt.internal.compiler.ast.TypeParameter;
import org.eclipse.jdt.internal.compiler.ast.TypeReference;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.mangosdk.spi.ProviderFor;
/**
* Handles the {@code lombok.Data} annotation for eclipse.
*/
@ProviderFor(EclipseAnnotationHandler.class)
public class HandleData implements EclipseAnnotationHandler<Data> {
public boolean handle(AnnotationValues<Data> annotation, Annotation ast, EclipseNode annotationNode) {
Data ann = annotation.getInstance();
EclipseNode typeNode = annotationNode.up();
TypeDeclaration typeDecl = null;
if (typeNode.get() instanceof TypeDeclaration) typeDecl = (TypeDeclaration) typeNode.get();
int modifiers = typeDecl == null ? 0 : typeDecl.modifiers;
boolean notAClass = (modifiers &
(ClassFileConstants.AccInterface | ClassFileConstants.AccAnnotation | ClassFileConstants.AccEnum)) != 0;
if (typeDecl == null || notAClass) {
annotationNode.addError("@Data is only supported on a class.");
return false;
}
List<EclipseNode> nodesForConstructor = new ArrayList<EclipseNode>();
Map<EclipseNode, Boolean> gettersAndSetters = new LinkedHashMap<EclipseNode, Boolean>();
for (EclipseNode child : typeNode.down()) {
if (child.getKind() != Kind.FIELD) continue;
FieldDeclaration fieldDecl = (FieldDeclaration) child.get();
//Skip fields that start with $
if (fieldDecl.name.length > 0 && fieldDecl.name[0] == '$') continue;
//Skip static fields.
if ((fieldDecl.modifiers & ClassFileConstants.AccStatic) != 0) continue;
boolean isFinal = (fieldDecl.modifiers & ClassFileConstants.AccFinal) != 0;
boolean isNonNull = findAnnotations(fieldDecl, TransformationsUtil.NON_NULL_PATTERN).length != 0;
if ((isFinal || isNonNull) && fieldDecl.initialization == null) nodesForConstructor.add(child);
gettersAndSetters.put(child, !isFinal);
}
//Careful: Generate the public static constructor (if there is one) LAST, so that any attempt to
//'find callers' on the annotation node will find callers of the constructor, which is by far the
//most useful of the many methods built by @Data. This trick won't work for the non-static constructor,
//for whatever reason, though you can find callers of that one by focusing on the class name itself
//and hitting 'find callers'.
if (constructorExists(typeNode) == MemberExistsResult.NOT_EXISTS) {
ConstructorDeclaration constructor = createConstructor(
ann.staticConstructor().length() == 0, typeNode, nodesForConstructor, ast);
injectMethod(typeNode, constructor);
}
if (ann.staticConstructor().length() > 0) {
if (methodExists("of", typeNode, false) == MemberExistsResult.NOT_EXISTS) {
MethodDeclaration staticConstructor = createStaticConstructor(
ann.staticConstructor(), typeNode, nodesForConstructor, ast);
injectMethod(typeNode, staticConstructor);
}
}
for (Map.Entry<EclipseNode, Boolean> field : gettersAndSetters.entrySet()) {
new HandleGetter().generateGetterForField(field.getKey(), annotationNode.get(), AccessLevel.PUBLIC, true);
if (field.getValue()) new HandleSetter().generateSetterForField(field.getKey(), annotationNode.get(), AccessLevel.PUBLIC, true);
}
new HandleEqualsAndHashCode().generateEqualsAndHashCodeForType(typeNode, annotationNode);
new HandleToString().generateToStringForType(typeNode, annotationNode);
return false;
}
private ConstructorDeclaration createConstructor(boolean isPublic,
EclipseNode type, Collection<EclipseNode> fields, ASTNode source) {
long p = (long)source.sourceStart << 32 | source.sourceEnd;
ConstructorDeclaration constructor = new ConstructorDeclaration(
((CompilationUnitDeclaration) type.top().get()).compilationResult);
Eclipse.setGeneratedBy(constructor, source);
constructor.modifiers = EclipseHandlerUtil.toEclipseModifier(isPublic ? AccessLevel.PUBLIC : AccessLevel.PRIVATE);
constructor.annotations = null;
constructor.selector = ((TypeDeclaration)type.get()).name;
constructor.constructorCall = new ExplicitConstructorCall(ExplicitConstructorCall.ImplicitSuper);
Eclipse.setGeneratedBy(constructor.constructorCall, source);
constructor.thrownExceptions = null;
constructor.typeParameters = null;
constructor.bits |= Eclipse.ECLIPSE_DO_NOT_TOUCH_FLAG;
constructor.bodyStart = constructor.declarationSourceStart = constructor.sourceStart = source.sourceStart;
constructor.bodyEnd = constructor.declarationSourceEnd = constructor.sourceEnd = source.sourceEnd;
constructor.arguments = null;
List<Argument> args = new ArrayList<Argument>();
List<Statement> assigns = new ArrayList<Statement>();
List<Statement> nullChecks = new ArrayList<Statement>();
for (EclipseNode fieldNode : fields) {
FieldDeclaration field = (FieldDeclaration) fieldNode.get();
FieldReference thisX = new FieldReference(("this." + new String(field.name)).toCharArray(), p);
Eclipse.setGeneratedBy(thisX, source);
thisX.receiver = new ThisReference((int)(p >> 32), (int)p);
Eclipse.setGeneratedBy(thisX.receiver, source);
thisX.token = field.name;
SingleNameReference assignmentNameRef = new SingleNameReference(field.name, p);
Eclipse.setGeneratedBy(assignmentNameRef, source);
Assignment assignment = new Assignment(thisX, assignmentNameRef, (int)p);
Eclipse.setGeneratedBy(assignment, source);
assigns.add(assignment);
long fieldPos = (((long)field.sourceStart) << 32) | field.sourceEnd;
Argument argument = new Argument(field.name, fieldPos, copyType(field.type, source), Modifier.FINAL);
Eclipse.setGeneratedBy(argument, source);
Annotation[] nonNulls = findAnnotations(field, TransformationsUtil.NON_NULL_PATTERN);
Annotation[] nullables = findAnnotations(field, TransformationsUtil.NULLABLE_PATTERN);
if (nonNulls.length != 0) {
Statement nullCheck = generateNullCheck(field, source);
if (nullCheck != null) nullChecks.add(nullCheck);
}
Annotation[] copiedAnnotations = copyAnnotations(nonNulls, nullables, source);
if (copiedAnnotations.length != 0) argument.annotations = copiedAnnotations;
args.add(argument);
}
nullChecks.addAll(assigns);
constructor.statements = nullChecks.isEmpty() ? null : nullChecks.toArray(new Statement[nullChecks.size()]);
constructor.arguments = args.isEmpty() ? null : args.toArray(new Argument[args.size()]);
return constructor;
}
private MethodDeclaration createStaticConstructor(String name, EclipseNode type, Collection<EclipseNode> fields, ASTNode source) {
int pS = source.sourceStart, pE = source.sourceEnd;
long p = (long)pS << 32 | pE;
MethodDeclaration constructor = new MethodDeclaration(
((CompilationUnitDeclaration) type.top().get()).compilationResult);
Eclipse.setGeneratedBy(constructor, source);
constructor.modifiers = EclipseHandlerUtil.toEclipseModifier(AccessLevel.PUBLIC) | Modifier.STATIC;
TypeDeclaration typeDecl = (TypeDeclaration) type.get();
if (typeDecl.typeParameters != null && typeDecl.typeParameters.length > 0) {
TypeReference[] refs = new TypeReference[typeDecl.typeParameters.length];
int idx = 0;
for (TypeParameter param : typeDecl.typeParameters) {
TypeReference typeRef = new SingleTypeReference(param.name, (long)param.sourceStart << 32 | param.sourceEnd);
Eclipse.setGeneratedBy(typeRef, source);
refs[idx++] = typeRef;
}
constructor.returnType = new ParameterizedSingleTypeReference(typeDecl.name, refs, 0, p);
} else constructor.returnType = new SingleTypeReference(((TypeDeclaration)type.get()).name, p);
Eclipse.setGeneratedBy(constructor.returnType, source);
constructor.annotations = null;
constructor.selector = name.toCharArray();
constructor.thrownExceptions = null;
constructor.typeParameters = copyTypeParams(((TypeDeclaration)type.get()).typeParameters, source);
constructor.bits |= Eclipse.ECLIPSE_DO_NOT_TOUCH_FLAG;
constructor.bodyStart = constructor.declarationSourceStart = constructor.sourceStart = source.sourceStart;
constructor.bodyEnd = constructor.declarationSourceEnd = constructor.sourceEnd = source.sourceEnd;
List<Argument> args = new ArrayList<Argument>();
List<Expression> assigns = new ArrayList<Expression>();
AllocationExpression statement = new AllocationExpression();
statement.sourceStart = pS; statement.sourceEnd = pE;
Eclipse.setGeneratedBy(statement, source);
statement.type = copyType(constructor.returnType, source);
for (EclipseNode fieldNode : fields) {
FieldDeclaration field = (FieldDeclaration) fieldNode.get();
long fieldPos = (((long)field.sourceStart) << 32) | field.sourceEnd;
SingleNameReference nameRef = new SingleNameReference(field.name, fieldPos);
Eclipse.setGeneratedBy(nameRef, source);
assigns.add(nameRef);
Argument argument = new Argument(field.name, fieldPos, copyType(field.type, source), 0);
Eclipse.setGeneratedBy(argument, source);
Annotation[] copiedAnnotations = copyAnnotations(
findAnnotations(field, TransformationsUtil.NON_NULL_PATTERN),
findAnnotations(field, TransformationsUtil.NULLABLE_PATTERN), source);
if (copiedAnnotations.length != 0) argument.annotations = copiedAnnotations;
args.add(new Argument(field.name, fieldPos, copyType(field.type, source), Modifier.FINAL));
}
statement.arguments = assigns.isEmpty() ? null : assigns.toArray(new Expression[assigns.size()]);
constructor.arguments = args.isEmpty() ? null : args.toArray(new Argument[args.size()]);
constructor.statements = new Statement[] { new ReturnStatement(statement, (int)(p >> 32), (int)p) };
Eclipse.setGeneratedBy(constructor.statements[0], source);
return constructor;
}
}
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