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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) 2009 Contributors
 * 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:
 *     initial implementation   Andy Clement
 * ******************************************************************/
package org.aspectj.weaver.patterns;

import java.io.IOException;
import java.util.List;

import org.aspectj.weaver.CompressingDataOutputStream;
import org.aspectj.weaver.ISourceContext;
import org.aspectj.weaver.VersionedDataInputStream;

/**
 * Constructed based on an @DeclareMixin being found in an aspect.
 *
 * @author Andy Clement
 */
public class DeclareParentsMixin extends DeclareParents {
	private int bitflags = 0x0000; // for future expansion

	public DeclareParentsMixin(TypePattern child, List parents) {
		super(child, parents, true);
	}

	public DeclareParentsMixin(TypePattern child, TypePatternList parents) {
		super(child, parents, true);
	}

	public boolean equals(Object other) {
		if (!(other instanceof DeclareParentsMixin)) {
			return false;
		}
		DeclareParentsMixin o = (DeclareParentsMixin) other;
		return o.child.equals(child) && o.parents.equals(parents) && o.bitflags == bitflags;
	}

	public int hashCode() {
		int result = 23;
		result = 37 * result + child.hashCode();
		result = 37 * result + parents.hashCode();
		result = 37 * result + bitflags;
		return result;
	}

	public void write(CompressingDataOutputStream s) throws IOException {
		s.writeByte(Declare.PARENTSMIXIN);
		child.write(s);
		parents.write(s);
		writeLocation(s);
		s.writeInt(bitflags);
	}

	public static Declare read(VersionedDataInputStream s, ISourceContext context) throws IOException {
		DeclareParentsMixin ret = new DeclareParentsMixin(TypePattern.read(s, context), TypePatternList.read(s, context));
		ret.readLocation(context, s);
		ret.bitflags = s.readInt();
		return ret;
	}

	public String toString() {
		StringBuilder buf = new StringBuilder();
		buf.append("declare parents mixin: ");
		buf.append(child);
		buf.append(" implements ");
		buf.append(parents);
		buf.append(";");
		buf.append("bits=0x").append(Integer.toHexString(bitflags));
		return buf.toString();
	}

	public boolean isMixin() {
		return true;
	}

}