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PoliceExtensionUse.java

/*******************************************************************************
 * 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()
 */
00025 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;
      }

}

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