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/*
* Copyright (C) 2014-2021 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.handleExperimentalFlagUsage;
import static lombok.eclipse.handlers.EclipseHandlerUtil.*;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jdt.internal.compiler.ASTVisitor;
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.Clinit;
import org.eclipse.jdt.internal.compiler.ast.ConstructorDeclaration;
import org.eclipse.jdt.internal.compiler.ast.ExplicitConstructorCall;
import org.eclipse.jdt.internal.compiler.ast.FieldDeclaration;
import org.eclipse.jdt.internal.compiler.ast.QualifiedTypeReference;
import org.eclipse.jdt.internal.compiler.ast.Statement;
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 lombok.AccessLevel;
import lombok.ConfigurationKeys;
import lombok.core.AST.Kind;
import lombok.core.AnnotationValues;
import lombok.core.configuration.IdentifierName;
import lombok.core.handlers.HandlerUtil;
import lombok.eclipse.Eclipse;
import lombok.eclipse.EclipseAnnotationHandler;
import lombok.eclipse.EclipseNode;
import lombok.eclipse.handlers.EclipseHandlerUtil.MemberExistsResult;
import lombok.experimental.FieldNameConstants;
import lombok.spi.Provides;
@Provides
public class HandleFieldNameConstants extends EclipseAnnotationHandler<FieldNameConstants> {
private static final IdentifierName FIELDS = IdentifierName.valueOf("Fields");
public void generateFieldNameConstantsForType(EclipseNode typeNode, EclipseNode errorNode, AccessLevel level, boolean asEnum, IdentifierName innerTypeName, boolean onlyExplicit, boolean uppercase) {
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 or an enum.");
return;
}
List<EclipseNode> qualified = new ArrayList<EclipseNode>();
for (EclipseNode field : typeNode.down()) {
if (fieldQualifiesForFieldNameConstantsGeneration(field, onlyExplicit)) qualified.add(field);
}
if (qualified.isEmpty()) {
errorNode.addWarning("No fields qualify for @FieldNameConstants, therefore this annotation does nothing");
} else {
createInnerTypeFieldNameConstants(typeNode, errorNode, errorNode.get(), level, qualified, asEnum, innerTypeName, uppercase);
}
}
private boolean fieldQualifiesForFieldNameConstantsGeneration(EclipseNode field, boolean onlyExplicit) {
if (field.getKind() != Kind.FIELD) return false;
if (hasAnnotation(FieldNameConstants.Exclude.class, field)) return false;
if (hasAnnotation(FieldNameConstants.Include.class, field)) return true;
if (onlyExplicit) return false;
FieldDeclaration fieldDecl = (FieldDeclaration) field.get();
return filterField(fieldDecl);
}
@Override public void handle(AnnotationValues<FieldNameConstants> annotation, Annotation ast, EclipseNode annotationNode) {
handleExperimentalFlagUsage(annotationNode, ConfigurationKeys.FIELD_NAME_CONSTANTS_FLAG_USAGE, "@FieldNameConstants");
EclipseNode node = annotationNode.up();
FieldNameConstants annotationInstance = annotation.getInstance();
AccessLevel level = annotationInstance.level();
boolean asEnum = annotationInstance.asEnum();
boolean usingLombokv1_18_2 = annotation.isExplicit("prefix") || annotation.isExplicit("suffix") || node.getKind() == Kind.FIELD;
if (usingLombokv1_18_2) {
annotationNode.addError("@FieldNameConstants has been redesigned in lombok v1.18.4; please upgrade your project dependency on lombok. See https://projectlombok.org/features/experimental/FieldNameConstants for more information.");
return;
}
if (level == AccessLevel.NONE) {
annotationNode.addWarning("AccessLevel.NONE is not compatible with @FieldNameConstants. If you don't want the inner type, simply remove FieldNameConstants.");
return;
}
IdentifierName innerTypeName;
try {
innerTypeName = IdentifierName.valueOf(annotationInstance.innerTypeName());
} catch(IllegalArgumentException e) {
annotationNode.addError("InnerTypeName " + annotationInstance.innerTypeName() + " is not a valid Java identifier.");
return;
}
if (innerTypeName == null) innerTypeName = annotationNode.getAst().readConfiguration(ConfigurationKeys.FIELD_NAME_CONSTANTS_INNER_TYPE_NAME);
if (innerTypeName == null) innerTypeName = FIELDS;
Boolean uppercase = annotationNode.getAst().readConfiguration(ConfigurationKeys.FIELD_NAME_CONSTANTS_UPPERCASE);
if (uppercase == null) uppercase = false;
generateFieldNameConstantsForType(node, annotationNode, level, asEnum, innerTypeName, annotationInstance.onlyExplicitlyIncluded(), uppercase);
}
private void createInnerTypeFieldNameConstants(EclipseNode typeNode, EclipseNode errorNode, ASTNode source, AccessLevel level, List<EclipseNode> fields, boolean asEnum, IdentifierName innerTypeName, boolean uppercase) {
if (fields.isEmpty()) return;
ASTVisitor generatedByVisitor = new SetGeneratedByVisitor(source);
TypeDeclaration parent = (TypeDeclaration) typeNode.get();
EclipseNode fieldsType = findInnerClass(typeNode, innerTypeName.getName());
boolean genConstr = false, genClinit = false;
char[] name = innerTypeName.getCharArray();
if (fieldsType == null) {
TypeDeclaration generatedInnerType = new TypeDeclaration(parent.compilationResult);
generatedInnerType.bits |= Eclipse.ECLIPSE_DO_NOT_TOUCH_FLAG;
generatedInnerType.modifiers = toEclipseModifier(level) | (asEnum ? ClassFileConstants.AccEnum : (ClassFileConstants.AccStatic | ClassFileConstants.AccFinal));
generatedInnerType.name = name;
fieldsType = injectType(typeNode, generatedInnerType);
genConstr = true;
genClinit = asEnum;
generatedInnerType.traverse(generatedByVisitor, ((TypeDeclaration) typeNode.get()).scope);
} else {
TypeDeclaration builderTypeDeclaration = (TypeDeclaration) fieldsType.get();
if (asEnum && (builderTypeDeclaration.modifiers & ClassFileConstants.AccEnum) == 0) {
errorNode.addError("Existing " + innerTypeName + " must be declared as an 'enum'.");
return;
}
if (!asEnum && (builderTypeDeclaration.modifiers & ClassFileConstants.AccStatic) == 0) {
errorNode.addError("Existing " + innerTypeName + " must be declared as a 'static class'.");
return;
}
genConstr = constructorExists(fieldsType) == MemberExistsResult.NOT_EXISTS;
}
if (genConstr) {
ConstructorDeclaration constructor = new ConstructorDeclaration(parent.compilationResult);
constructor.selector = name;
constructor.modifiers = ClassFileConstants.AccPrivate;
ExplicitConstructorCall superCall = new ExplicitConstructorCall(0);
superCall.sourceStart = source.sourceStart;
superCall.sourceEnd = source.sourceEnd;
superCall.bits |= Eclipse.ECLIPSE_DO_NOT_TOUCH_FLAG;
constructor.constructorCall = superCall;
if (!asEnum) constructor.statements = new Statement[0];
injectMethod(fieldsType, constructor);
}
Clinit cli = null;
if (genClinit) {
cli = new Clinit(parent.compilationResult);
injectMethod(fieldsType, cli);
}
for (EclipseNode fieldNode : fields) {
FieldDeclaration field = (FieldDeclaration) fieldNode.get();
char[] fName = field.name;
if (uppercase) fName = HandlerUtil.camelCaseToConstant(new String(fName)).toCharArray();
if (fieldExists(new String(fName), fieldsType) != MemberExistsResult.NOT_EXISTS) continue;
int pS = source.sourceStart, pE = source.sourceEnd;
long p = (long) pS << 32 | pE;
FieldDeclaration constantField = new FieldDeclaration(fName, pS, pE);
constantField.bits |= Eclipse.ECLIPSE_DO_NOT_TOUCH_FLAG;
if (asEnum) {
AllocationExpression ac = new AllocationExpression();
ac.enumConstant = constantField;
ac.sourceStart = source.sourceStart;
ac.sourceEnd = source.sourceEnd;
constantField.initialization = ac;
constantField.modifiers = 0;
((TypeDeclaration) fieldsType.get()).enumConstantsCounter++;
} else {
constantField.type = new QualifiedTypeReference(TypeConstants.JAVA_LANG_STRING, new long[] {p, p, p});
constantField.initialization = new StringLiteral(field.name, pS, pE, 0);
constantField.modifiers = ClassFileConstants.AccPublic | ClassFileConstants.AccStatic | ClassFileConstants.AccFinal;
}
injectField(fieldsType, constantField);
constantField.traverse(generatedByVisitor, ((TypeDeclaration) fieldsType.get()).initializerScope);
}
if (genClinit) {
cli.traverse(generatedByVisitor, ((TypeDeclaration) fieldsType.get()).scope);
}
}
}
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