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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.Arrays;
import lombok.AccessLevel;
import lombok.ConfigurationKeys;
import lombok.core.AST.Kind;
import lombok.core.AnnotationValues;
import lombok.core.HandlerPriority;
import lombok.eclipse.Eclipse;
import lombok.eclipse.EclipseASTAdapter;
import lombok.eclipse.EclipseASTVisitor;
import lombok.eclipse.EclipseNode;
import lombok.experimental.FieldDefaults;
import lombok.experimental.NonFinal;
import lombok.experimental.PackagePrivate;
import lombok.spi.Provides;
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.SingleTypeReference;
import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.eclipse.jdt.internal.compiler.ast.TypeReference;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
/**
* Handles the {@code lombok.FieldDefaults} annotation for eclipse.
*/
@Provides(EclipseASTVisitor.class)
@HandlerPriority(-2048) //-2^11; to ensure @Value picks up on messing with the fields' 'final' state, run earlier.
public class HandleFieldDefaults extends EclipseASTAdapter {
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;
}
}
if (!isClassOrEnum(typeNode)) {
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)) {
if ((field.modifiers & ClassFileConstants.AccStatic) == 0) {
field.modifiers |= EclipseHandlerUtil.toEclipseModifier(level);
}
}
}
}
if (makeFinal && (field.modifiers & ClassFileConstants.AccFinal) == 0) {
if (!hasAnnotation(NonFinal.class, fieldNode)) {
if ((field.modifiers & ClassFileConstants.AccStatic) == 0) {
field.modifiers |= ClassFileConstants.AccFinal;
}
}
}
fieldNode.rebuild();
}
private static final char[] FIELD_DEFAULTS = "FieldDefaults".toCharArray();
@Override public void visitType(EclipseNode typeNode, TypeDeclaration type) {
AnnotationValues<FieldDefaults> fieldDefaults = null;
EclipseNode source = typeNode;
boolean levelIsExplicit = false;
boolean makeFinalIsExplicit = false;
FieldDefaults fd = null;
for (EclipseNode jn : typeNode.down()) {
if (jn.getKind() != Kind.ANNOTATION) continue;
Annotation ann = (Annotation) jn.get();
TypeReference typeTree = ann.type;
if (typeTree == null) continue;
if (typeTree instanceof SingleTypeReference) {
char[] t = ((SingleTypeReference) typeTree).token;
if (!Arrays.equals(t, FIELD_DEFAULTS)) continue;
} else if (typeTree instanceof QualifiedTypeReference) {
char[][] t = ((QualifiedTypeReference) typeTree).tokens;
if (!Eclipse.nameEquals(t, "lombok.experimental.FieldDefaults")) continue;
} else {
continue;
}
if (!typeMatches(FieldDefaults.class, jn, typeTree)) continue;
source = jn;
fieldDefaults = createAnnotation(FieldDefaults.class, jn);
levelIsExplicit = fieldDefaults.isExplicit("level");
makeFinalIsExplicit = fieldDefaults.isExplicit("makeFinal");
handleExperimentalFlagUsage(jn, ConfigurationKeys.FIELD_DEFAULTS_FLAG_USAGE, "@FieldDefaults");
fd = fieldDefaults.getInstance();
if (!levelIsExplicit && !makeFinalIsExplicit) {
jn.addError("This does nothing; provide either level or makeFinal or both.");
}
if (levelIsExplicit && fd.level() == AccessLevel.NONE) {
jn.addError("AccessLevel.NONE doesn't mean anything here. Pick another value.");
levelIsExplicit = false;
}
break;
}
if (fd == null && (type.modifiers & (ClassFileConstants.AccInterface | ClassFileConstants.AccAnnotation)) != 0) return;
boolean defaultToPrivate = levelIsExplicit ? false : Boolean.TRUE.equals(typeNode.getAst().readConfiguration(ConfigurationKeys.FIELD_DEFAULTS_PRIVATE_EVERYWHERE));
boolean defaultToFinal = makeFinalIsExplicit ? false : Boolean.TRUE.equals(typeNode.getAst().readConfiguration(ConfigurationKeys.FIELD_DEFAULTS_FINAL_EVERYWHERE));
if (!defaultToPrivate && !defaultToFinal && fieldDefaults == null) return;
// Do not apply field defaults to records if set using the config system
if (fieldDefaults == null && !isClassOrEnum(typeNode)) return;
AccessLevel fdAccessLevel = (fieldDefaults != null && levelIsExplicit) ? fd.level() : defaultToPrivate ? AccessLevel.PRIVATE : null;
boolean fdToFinal = (fieldDefaults != null && makeFinalIsExplicit) ? fd.makeFinal() : defaultToFinal;
generateFieldDefaultsForType(typeNode, source, fdAccessLevel, fdToFinal, false);
}
}
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