/*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jboss.aspects.versioned;

import java.lang.reflect.Method;
import java.util.HashMap;

import org.jboss.aop.joinpoint.MethodInvocation;
import org.jboss.aop.util.reference.MethodPersistentReference;

/**
 *
 *  @author <a href="mailto:bill@jboss.org">Bill Burke</a>
 *  @version $Revision: 1.2.2.6 $
 */
public class CollectionStateChangeInterceptor implements org.jboss.aop.advice.Interceptor
{
   protected CollectionStateManager manager;

   public CollectionStateChangeInterceptor(CollectionStateManager manager)
   {
      this.manager = manager;
   }

   public String getName() { return "CollectionChangeInterceptor"; }


   /**
    *
    */
   public Object invoke(org.jboss.aop.joinpoint.Invocation invocation) throws Throwable
   {
      if (invocation instanceof MethodInvocation)
      {
         org.jboss.aop.joinpoint.MethodInvocation methodInvocation = (org.jboss.aop.joinpoint.MethodInvocation)invocation;
         long methodHash = methodInvocation.getMethodHash();
         Method managerMethod = manager.isManagerMethod(methodHash);
         if (managerMethod != null)
         {
            Object[] args = methodInvocation.getArguments();
            return managerMethod.invoke(manager, args);
         }
         Object target = methodInvocation.getTargetObject();
         Method method = methodInvocation.getMethod();
         if (method == null)
         {
            HashMap methodMap = manager.getMethodMap();
            MethodPersistentReference ref = (MethodPersistentReference)methodMap.get(new Long(methodHash));
            method = (Method)ref.get();
         }
         return method.invoke(target, methodInvocation.getArguments());
      }
      return invocation.invokeNext();
   }

}
