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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 java.util.List;
import org.eclipse.jdt.internal.compiler.ast.Annotation;
import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import lombok.ConfigurationKeys;
import lombok.core.AnnotationValues;
import lombok.core.HandlerPriority;
import lombok.eclipse.EclipseAnnotationHandler;
import lombok.eclipse.EclipseNode;
import lombok.experimental.ExtensionMethod;
import lombok.spi.Provides;
// This handler just does some additional error checking; the real work is done in the agent.
@Provides
@HandlerPriority(66560) // 2^16 + 2^10; we must run AFTER HandleVal which is at 2^16
public class HandleExtensionMethod extends EclipseAnnotationHandler<ExtensionMethod> {
@Override public void handle(AnnotationValues<ExtensionMethod> annotation, Annotation ast, EclipseNode annotationNode) {
handleExperimentalFlagUsage(annotationNode, ConfigurationKeys.EXTENSION_METHOD_FLAG_USAGE, "@ExtensionMethod");
TypeDeclaration typeDecl = null;
EclipseNode owner = annotationNode.up();
if (owner.get() instanceof TypeDeclaration) typeDecl = (TypeDeclaration) owner.get();
int modifiers = typeDecl == null ? 0 : typeDecl.modifiers;
boolean notAClass = (modifiers &
(ClassFileConstants.AccInterface | ClassFileConstants.AccAnnotation)) != 0;
if (typeDecl == null || notAClass) {
annotationNode.addError("@ExtensionMethod is legal only on classes and enums.");
return;
}
List<Object> listenerInterfaces = annotation.getActualExpressions("value");
if (listenerInterfaces.isEmpty()) {
annotationNode.addWarning(String.format("@ExtensionMethod has no effect since no extension types were specified."));
return;
}
}
}
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