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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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/* *******************************************************************
 * Copyright (c) 2005 IBM
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v 2.0
 * which accompanies this distribution and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
 *
 * Contributors:
 *     Andy Clement     initial implementation
 * ******************************************************************/

package org.aspectj.weaver;

import java.io.IOException;

/**
 * Represents adding an annotation to a type
 */
public class AnnotationOnTypeMunger extends ResolvedTypeMunger {
	AnnotationAJ newAnnotation;

	public AnnotationOnTypeMunger(AnnotationAJ anno) {
		super(AnnotationOnType, null);
		newAnnotation = anno;
	}

	public void write(CompressingDataOutputStream s) throws IOException {
		throw new RuntimeException("unimplemented");
	}

	public AnnotationAJ getNewAnnotation() {
		return newAnnotation;
	}

	public boolean equals(Object other) {
		if (!(other instanceof AnnotationOnTypeMunger)) {
			return false;
		}
		AnnotationOnTypeMunger o = (AnnotationOnTypeMunger) other;
		// TODO does not check equality of annotation values
		return newAnnotation.getTypeSignature().equals(o.newAnnotation.getTypeSignature());
	}

	private volatile int hashCode = 0;

	public int hashCode() {
		if (hashCode == 0) {
			int result = 17;
			result = 37 * result + newAnnotation.getTypeSignature().hashCode();
			hashCode = result;
		}
		return hashCode;
	}

}