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/*
* Copyright (C) 2014-2018 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.handleExperimentalFlagUsage;
import static lombok.eclipse.handlers.EclipseHandlerUtil.*;
import java.lang.reflect.Modifier;
import java.util.Collection;
import lombok.AccessLevel;
import lombok.ConfigurationKeys;
import lombok.core.AST.Kind;
import lombok.core.AnnotationValues;
import lombok.core.handlers.HandlerUtil;
import lombok.eclipse.Eclipse;
import lombok.eclipse.EclipseAnnotationHandler;
import lombok.eclipse.EclipseNode;
import lombok.experimental.FieldNameConstants;
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.QualifiedTypeReference;
import org.eclipse.jdt.internal.compiler.ast.StringLiteral;
import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.lookup.TypeConstants;
import org.mangosdk.spi.ProviderFor;
@ProviderFor(EclipseAnnotationHandler.class)
public class HandleFieldNameConstants extends EclipseAnnotationHandler<FieldNameConstants> {
public void generateFieldNameConstantsForType(EclipseNode typeNode, EclipseNode errorNode, AccessLevel level) {
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) {
errorNode.addError("@FieldNameConstants is only supported on a class, an enum, or a field.");
return;
}
for (EclipseNode field : typeNode.down()) {
if (fieldQualifiesForFieldNameConstantsGeneration(field)) generateFieldNameConstantsForField(field, errorNode.get(), level);
}
}
private void generateFieldNameConstantsForField(EclipseNode fieldNode, ASTNode pos, AccessLevel level) {
if (hasAnnotation(FieldNameConstants.class, fieldNode)) return;
createFieldNameConstantsForField(level, fieldNode, fieldNode, pos, false);
}
private boolean fieldQualifiesForFieldNameConstantsGeneration(EclipseNode field) {
if (field.getKind() != Kind.FIELD) return false;
FieldDeclaration fieldDecl = (FieldDeclaration) field.get();
return filterField(fieldDecl);
}
public void handle(AnnotationValues<FieldNameConstants> annotation, Annotation ast, EclipseNode annotationNode) {
handleExperimentalFlagUsage(annotationNode, ConfigurationKeys.FIELD_NAME_CONSTANTS_FLAG_USAGE, "@FieldNameConstants");
EclipseNode node = annotationNode.up();
FieldNameConstants annotatationInstance = annotation.getInstance();
AccessLevel level = annotatationInstance.level();
if (node == null) return;
switch (node.getKind()) {
case FIELD:
if (level != AccessLevel.NONE) createFieldNameConstantsForFields(level, annotationNode.upFromAnnotationToFields(), annotationNode, annotationNode.get(), true);
break;
case TYPE:
if (level == AccessLevel.NONE) {
annotationNode.addWarning("type-level '@FieldNameConstants' does not work with AccessLevel.NONE.");
return;
}
generateFieldNameConstantsForType(node, annotationNode, level);
break;
}
}
private void createFieldNameConstantsForFields(AccessLevel level, Collection<EclipseNode> fieldNodes, EclipseNode errorNode, ASTNode source, boolean whineIfExists) {
for (EclipseNode fieldNode : fieldNodes) createFieldNameConstantsForField(level, fieldNode, errorNode, source, whineIfExists);
}
private void createFieldNameConstantsForField(AccessLevel level, EclipseNode fieldNode, EclipseNode errorNode, ASTNode source, boolean whineIfExists) {
if (fieldNode.getKind() != Kind.FIELD) {
errorNode.addError("@FieldNameConstants is only supported on a class, an enum, or a field");
return;
}
FieldDeclaration field = (FieldDeclaration) fieldNode.get();
String fieldName = new String(field.name);
String constantName = HandlerUtil.camelCaseToConstant(fieldName);
if (constantName.equals(fieldName)) {
fieldNode.addWarning("Not generating constant for this field: The name of the constant would be equal to the name of this field.");
return;
}
int pS = source.sourceStart, pE = source.sourceEnd;
long p = (long) pS << 32 | pE;
FieldDeclaration fieldConstant = new FieldDeclaration(constantName.toCharArray(), pS,pE);
fieldConstant.bits |= Eclipse.ECLIPSE_DO_NOT_TOUCH_FLAG;
fieldConstant.modifiers = toEclipseModifier(level) | Modifier.STATIC | Modifier.FINAL;
fieldConstant.type = new QualifiedTypeReference(TypeConstants.JAVA_LANG_STRING, new long[] {p,p,p});
fieldConstant.initialization = new StringLiteral(field.name, pS, pE, 0);
injectField(fieldNode.up(), fieldConstant);
}
}
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