Copyright (c) 2006 IBM 
All rights reserved. This program and the accompanying materials
are made available under the terms of the Eclipse Public License v1.0
which accompanies this distribution, and is available at
http://www.eclipse.org/legal/epl-v10.html
Contributors:
   Andy Clement - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2006 IBM 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * 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()
/**
 * 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;
	}

}