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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) 2006 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 API and implementation
 *******************************************************************************/
package org.aspectj.weaver;

import org.aspectj.bridge.IMessage;
import org.aspectj.bridge.MessageUtil;
import org.aspectj.weaver.patterns.AbstractPatternNodeVisitor;
import org.aspectj.weaver.patterns.AndPointcut;
import org.aspectj.weaver.patterns.KindedPointcut;
import org.aspectj.weaver.patterns.NotPointcut;
import org.aspectj.weaver.patterns.OrPointcut;
import org.aspectj.weaver.patterns.Pointcut;

/**
 * Walks a pointcut and determines if the synchronization related designators have been used: lock() or unlock()
 */
public class PoliceExtensionUse extends AbstractPatternNodeVisitor {

	private boolean synchronizationDesignatorEncountered;
	private World world;
	private Pointcut p;

	public PoliceExtensionUse(World w, Pointcut p) {
		this.world = w;
		this.p = p;
		this.synchronizationDesignatorEncountered = false;
	}

	public boolean synchronizationDesignatorEncountered() {
		return synchronizationDesignatorEncountered;
	}

	public Object visit(KindedPointcut node, Object data) {
		if (world == null)
			return super.visit(node, data); // error scenario can sometimes lead to this LazyClassGen.toLongString()
		if (node.getKind() == Shadow.SynchronizationLock || node.getKind() == Shadow.SynchronizationUnlock)
			synchronizationDesignatorEncountered = true;
		// Check it!
		if (!world.isJoinpointSynchronizationEnabled()) {
			if (node.getKind() == Shadow.SynchronizationLock) {
				IMessage m = MessageUtil.warn(
						"lock() pointcut designator cannot be used without the option -Xjoinpoints:synchronization", p
								.getSourceLocation());
				world.getMessageHandler().handleMessage(m);
			} else if (node.getKind() == Shadow.SynchronizationUnlock) {
				IMessage m = MessageUtil.warn(
						"unlock() pointcut designator cannot be used without the option -Xjoinpoints:synchronization", p
								.getSourceLocation());
				world.getMessageHandler().handleMessage(m);
			}
		}
		return super.visit(node, data);
	}

	public Object visit(AndPointcut node, Object data) {
		node.getLeft().accept(this, data);
		node.getRight().accept(this, data);
		return node;
	}

	public Object visit(NotPointcut node, Object data) {
		node.getNegatedPointcut().accept(this, data);
		return node;
	}

	public Object visit(OrPointcut node, Object data) {
		node.getLeft().accept(this, data);
		node.getRight().accept(this, data);
		return node;
	}

}