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The AspectJ matcher can be used for matching pointcuts independently of any AspectJ compilation or weaving steps. Most notably, this can be used by frameworks such as Spring AOP which utilise the @AspectJ pointcut syntax but implement aspect weaving in a way independent of AspectJ, e.g. using dynamic proxies.

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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;
	}

}