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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.*;
import static lombok.eclipse.handlers.EclipseHandlerUtil.*;
import java.lang.reflect.Modifier;
import lombok.AccessLevel;
import lombok.Setter;
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 org.eclipse.jdt.internal.compiler.ast.ASTNode;
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.FieldDeclaration;
import org.eclipse.jdt.internal.compiler.ast.FieldReference;
import org.eclipse.jdt.internal.compiler.ast.MethodDeclaration;
import org.eclipse.jdt.internal.compiler.ast.NameReference;
import org.eclipse.jdt.internal.compiler.ast.SingleNameReference;
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.TypeReference;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.lookup.TypeIds;
import org.mangosdk.spi.ProviderFor;
/**
* Handles the {@code lombok.Setter} annotation for eclipse.
*/
@ProviderFor(EclipseAnnotationHandler.class)
public class HandleSetter implements EclipseAnnotationHandler<Setter> {
/**
* Generates a setter on the stated field.
*
* Used by {@link HandleData}.
*
* The difference between this call and the handle method is as follows:
*
* If there is a {@code lombok.Setter} annotation on the field, it is used and the
* same rules apply (e.g. warning if the method already exists, stated access level applies).
* If not, the setter is still generated if it isn't already there, though there will not
* be a warning if its already there. The default access level is used.
*/
public void generateSetterForField(EclipseNode fieldNode, ASTNode pos, AccessLevel level, boolean checkForTypeLevelSetter) {
for (EclipseNode child : fieldNode.down()) {
if (child.getKind() == Kind.ANNOTATION) {
if (annotationTypeMatches(Setter.class, child)) {
//The annotation will make it happen, so we can skip it.
return;
}
}
}
if (checkForTypeLevelSetter) {
EclipseNode containingType = fieldNode.up();
if (containingType != null) for (EclipseNode child : containingType.down()) {
if (child.getKind() == Kind.ANNOTATION) {
if (annotationTypeMatches(Setter.class, child)) {
//The annotation will make it happen, so we can skip it.
return;
}
}
}
}
createSetterForField(level, fieldNode, fieldNode, pos, false);
}
public boolean handle(AnnotationValues<Setter> annotation, Annotation ast, EclipseNode annotationNode) {
EclipseNode node = annotationNode.up();
AccessLevel level = annotation.getInstance().value();
if (level == AccessLevel.NONE) return true;
if (node == null) return false;
if (node.getKind() == Kind.FIELD) {
return createSetterForField(level, node, annotationNode, annotationNode.get(), true);
}
if (node.getKind() == Kind.TYPE) {
TypeDeclaration typeDecl = null;
if (node.get() instanceof TypeDeclaration) typeDecl = (TypeDeclaration) node.get();
int modifiers = typeDecl == null ? 0 : typeDecl.modifiers;
boolean notAClass = (modifiers &
(ClassFileConstants.AccInterface | ClassFileConstants.AccAnnotation | ClassFileConstants.AccEnum)) != 0;
if (typeDecl == null || notAClass) {
annotationNode.addError("@Setter is only supported on a class.");
return false;
}
for (EclipseNode field : node.down()) {
if (field.getKind() != Kind.FIELD) continue;
generateSetterForField(field, ast, level, false);
}
return true;
}
return false;
}
private boolean createSetterForField(AccessLevel level,
EclipseNode fieldNode, EclipseNode errorNode, ASTNode pos, boolean whineIfExists) {
if (fieldNode.getKind() != Kind.FIELD) {
errorNode.addError("@Setter is only supported on a field.");
return true;
}
FieldDeclaration field = (FieldDeclaration) fieldNode.get();
String setterName = TransformationsUtil.toSetterName(new String(field.name));
int modifier = toEclipseModifier(level) | (field.modifiers & ClassFileConstants.AccStatic);
switch (methodExists(setterName, fieldNode, false)) {
case EXISTS_BY_LOMBOK:
return true;
case EXISTS_BY_USER:
if (whineIfExists) errorNode.addWarning(
String.format("Not generating %s(%s %s): A method with that name already exists",
setterName, field.type, new String(field.name)));
return true;
default:
case NOT_EXISTS:
//continue with creating the setter
}
MethodDeclaration method = generateSetter((TypeDeclaration) fieldNode.up().get(), field, setterName, modifier, pos);
injectMethod(fieldNode.up(), method);
return true;
}
private MethodDeclaration generateSetter(TypeDeclaration parent, FieldDeclaration field, String name,
int modifier, ASTNode source) {
int pS = source.sourceStart, pE = source.sourceEnd;
long p = (long)pS << 32 | pE;
MethodDeclaration method = new MethodDeclaration(parent.compilationResult);
Eclipse.setGeneratedBy(method, source);
method.modifiers = modifier;
method.returnType = TypeReference.baseTypeReference(TypeIds.T_void, 0);
method.returnType.sourceStart = pS; method.returnType.sourceEnd = pE;
Eclipse.setGeneratedBy(method.returnType, source);
method.annotations = null;
Argument param = new Argument(field.name, p, copyType(field.type, source), Modifier.FINAL);
param.sourceStart = pS; param.sourceEnd = pE;
Eclipse.setGeneratedBy(param, source);
method.arguments = new Argument[] { param };
method.selector = name.toCharArray();
method.binding = null;
method.thrownExceptions = null;
method.typeParameters = null;
method.bits |= ECLIPSE_DO_NOT_TOUCH_FLAG;
FieldReference thisX = new FieldReference(field.name, p);
Eclipse.setGeneratedBy(thisX, source);
thisX.receiver = new ThisReference(source.sourceStart, source.sourceEnd);
Eclipse.setGeneratedBy(thisX.receiver, source);
NameReference fieldNameRef = new SingleNameReference(field.name, p);
Eclipse.setGeneratedBy(fieldNameRef, source);
Assignment assignment = new Assignment(thisX, fieldNameRef, (int)p);
assignment.sourceStart = pS; assignment.sourceEnd = pE;
Eclipse.setGeneratedBy(assignment, source);
method.bodyStart = method.declarationSourceStart = method.sourceStart = source.sourceStart;
method.bodyEnd = method.declarationSourceEnd = method.sourceEnd = source.sourceEnd;
Annotation[] nonNulls = findAnnotations(field, TransformationsUtil.NON_NULL_PATTERN);
Annotation[] nullables = findAnnotations(field, TransformationsUtil.NULLABLE_PATTERN);
if (nonNulls.length == 0) {
method.statements = new Statement[] { assignment };
} else {
Statement nullCheck = generateNullCheck(field, source);
if (nullCheck != null) method.statements = new Statement[] { nullCheck, assignment };
else method.statements = new Statement[] { assignment };
}
Annotation[] copiedAnnotations = copyAnnotations(nonNulls, nullables, source);
if (copiedAnnotations.length != 0) param.annotations = copiedAnnotations;
return method;
}
}
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