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/*
* Copyright (C) 2012 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.eclipse.handlers;
import static lombok.eclipse.handlers.EclipseHandlerUtil.*;
import lombok.AccessLevel;
import lombok.core.AST.Kind;
import lombok.core.AnnotationValues;
import lombok.core.HandlerPriority;
import lombok.eclipse.EclipseAnnotationHandler;
import lombok.eclipse.EclipseNode;
import lombok.experimental.FieldDefaults;
import lombok.experimental.NonFinal;
import lombok.experimental.PackagePrivate;
import org.eclipse.jdt.internal.compiler.ast.ASTNode;
import org.eclipse.jdt.internal.compiler.ast.Annotation;
import org.eclipse.jdt.internal.compiler.ast.FieldDeclaration;
import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.mangosdk.spi.ProviderFor;
/**
* Handles the {@code lombok.FieldDefaults} annotation for eclipse.
*/
@ProviderFor(EclipseAnnotationHandler.class)
@HandlerPriority(-2048) //-2^11; to ensure @Value picks up on messing with the fields' 'final' state, run earlier.
public class HandleFieldDefaults extends EclipseAnnotationHandler<FieldDefaults> {
public boolean generateFieldDefaultsForType(EclipseNode typeNode, EclipseNode pos, AccessLevel level, boolean makeFinal, boolean checkForTypeLevelFieldDefaults) {
if (checkForTypeLevelFieldDefaults) {
if (hasAnnotation(FieldDefaults.class, typeNode)) {
//The annotation will make it happen, so we can skip it.
return true;
}
}
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)) != 0;
if (typeDecl == null || notAClass) {
pos.addError("@FieldDefaults is only supported on a class or an enum.");
return false;
}
for (EclipseNode field : typeNode.down()) {
if (field.getKind() != Kind.FIELD) continue;
FieldDeclaration fieldDecl = (FieldDeclaration) field.get();
if (!filterField(fieldDecl, false)) continue;
Class<?> t = field.get().getClass();
if (t == FieldDeclaration.class) {
// There are various other things that extend FieldDeclaration that really
// aren't field declarations. Typing 'ma' in an otherwise blank class is a
// CompletionOnFieldType object (extends FieldDeclaration). If we mess with the
// modifiers of such a thing, you take away template suggestions such as
// 'main method'. See issue 411.
setFieldDefaultsForField(field, pos.get(), level, makeFinal);
}
}
return true;
}
public void setFieldDefaultsForField(EclipseNode fieldNode, ASTNode pos, AccessLevel level, boolean makeFinal) {
FieldDeclaration field = (FieldDeclaration) fieldNode.get();
if (level != null && level != AccessLevel.NONE) {
if ((field.modifiers & (ClassFileConstants.AccPublic | ClassFileConstants.AccPrivate | ClassFileConstants.AccProtected)) == 0) {
if (!hasAnnotation(PackagePrivate.class, fieldNode)) {
field.modifiers |= EclipseHandlerUtil.toEclipseModifier(level);
}
}
}
if (makeFinal && (field.modifiers & ClassFileConstants.AccFinal) == 0) {
if (!hasAnnotation(NonFinal.class, fieldNode)) {
field.modifiers |= ClassFileConstants.AccFinal;
}
}
fieldNode.rebuild();
}
public void handle(AnnotationValues<FieldDefaults> annotation, Annotation ast, EclipseNode annotationNode) {
EclipseNode node = annotationNode.up();
FieldDefaults instance = annotation.getInstance();
AccessLevel level = instance.level();
boolean makeFinal = instance.makeFinal();
if (level == AccessLevel.NONE && !makeFinal) {
annotationNode.addError("This does nothing; provide either level or makeFinal or both.");
return;
}
if (level == AccessLevel.PACKAGE) {
annotationNode.addError("Setting 'level' to PACKAGE does nothing. To force fields as package private, use the @PackagePrivate annotation on the field.");
}
if (!makeFinal && annotation.isExplicit("makeFinal")) {
annotationNode.addError("Setting 'makeFinal' to false does nothing. To force fields to be non-final, use the @NonFinal annotation on the field.");
}
if (node == null) return;
generateFieldDefaultsForType(node, annotationNode, level, makeFinal, false);
}
}
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