/*

  * Copyright 2005-2008 The Kuali Foundation

  * 

  * 

  * Licensed under the Educational Community License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  * 

  * http://www.opensource.org/licenses/ecl2.php

  * 

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.kuali.rice.kew.engine.transition;

 import org.kuali.rice.kew.engine.RouteContext;

 import org.kuali.rice.kew.engine.node.JoinNode;

 import org.kuali.rice.kew.engine.node.ProcessResult;

 import org.kuali.rice.kew.engine.node.RouteNodeInstance;

 /**

  * Handles transitions to and from {@link JoinNode} nodes in the route path.

  * 

  * @see JoinNode

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class JoinTransitionEngine extends TransitionEngine {

     public RouteNodeInstance transitionTo(RouteNodeInstance nextNodeInstance, RouteContext context) {

         if (context.getNodeInstance().getBranch().getJoinNode() != null) {

             nextNodeInstance = context.getNodeInstance().getBranch().getJoinNode();

         } else{

             getRouteHelper().getJoinEngine().createExpectedJoinState(context, nextNodeInstance, context.getNodeInstance());

         }

         getRouteHelper().getJoinEngine().addActualJoiner(nextNodeInstance, context.getNodeInstance().getBranch());

         return nextNodeInstance;

     }

     public ProcessResult isComplete(RouteContext context) throws Exception {

         RouteNodeInstance nodeInstance = context.getNodeInstance();

                 JoinNode node = (JoinNode)getNode(nodeInstance.getRouteNode(), JoinNode.class);

                 return node.process(context, getRouteHelper());

     }

 }