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/*
* Copyright (C) 2012-2021 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.eclipse.handlers;
import static lombok.core.handlers.HandlerUtil.*;
import static lombok.eclipse.handlers.EclipseHandlerUtil.*;
import java.util.Collections;
import lombok.AccessLevel;
import lombok.ConfigurationKeys;
import lombok.core.AnnotationValues;
import lombok.core.HandlerPriority;
import lombok.eclipse.EclipseAnnotationHandler;
import lombok.eclipse.EclipseNode;
import lombok.eclipse.handlers.HandleConstructor.SkipIfConstructorExists;
import lombok.experimental.NonFinal;
import lombok.spi.Provides;
import lombok.Value;
import org.eclipse.jdt.internal.compiler.ast.Annotation;
import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
/**
* Handles the {@code lombok.Value} annotation for eclipse.
*/
@Provides
@HandlerPriority(-512) //-2^9; to ensure @EqualsAndHashCode and such pick up on this handler making the class final and messing with the fields' access levels, run earlier.
public class HandleValue extends EclipseAnnotationHandler<Value> {
private HandleFieldDefaults handleFieldDefaults = new HandleFieldDefaults();
private HandleGetter handleGetter = new HandleGetter();
private HandleEqualsAndHashCode handleEqualsAndHashCode = new HandleEqualsAndHashCode();
private HandleToString handleToString = new HandleToString();
private HandleConstructor handleConstructor = new HandleConstructor();
public void handle(AnnotationValues<Value> annotation, Annotation ast, EclipseNode annotationNode) {
handleFlagUsage(annotationNode, ConfigurationKeys.VALUE_FLAG_USAGE, "@Value");
Value 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("@Value is only supported on a class.");
return;
}
// Make class final.
if (!hasAnnotation(NonFinal.class, typeNode)) {
if ((typeDecl.modifiers & ClassFileConstants.AccFinal) == 0) {
typeDecl.modifiers |= ClassFileConstants.AccFinal;
typeNode.rebuild();
}
}
handleFieldDefaults.generateFieldDefaultsForType(typeNode, annotationNode, AccessLevel.PRIVATE, true, true);
//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 @Value. 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'.
handleGetter.generateGetterForType(typeNode, annotationNode, AccessLevel.PUBLIC, true, Collections.<Annotation>emptyList());
handleEqualsAndHashCode.generateEqualsAndHashCodeForType(typeNode, annotationNode);
handleToString.generateToStringForType(typeNode, annotationNode);
handleConstructor.generateAllArgsConstructor(typeNode, AccessLevel.PUBLIC, ann.staticConstructor(), SkipIfConstructorExists.YES,
Collections.<Annotation>emptyList(), annotationNode);
handleConstructor.generateExtraNoArgsConstructor(typeNode, annotationNode);
}
}
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