001    /**
002     * Copyright 2005-2012 The Kuali Foundation
003     *
004     * Licensed under the Educational Community License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.opensource.org/licenses/ecl2.php
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    package org.kuali.rice.kew.engine.transition;
017    
018    import org.kuali.rice.kew.engine.RouteContext;
019    import org.kuali.rice.kew.engine.node.JoinNode;
020    import org.kuali.rice.kew.engine.node.ProcessResult;
021    import org.kuali.rice.kew.engine.node.RouteNodeInstance;
022    
023    /**
024     * Handles transitions to and from {@link JoinNode} nodes in the route path.
025     * 
026     * @see JoinNode
027     * 
028     * @author Kuali Rice Team (rice.collab@kuali.org)
029     */
030    public class JoinTransitionEngine extends TransitionEngine {
031    
032        public RouteNodeInstance transitionTo(RouteNodeInstance nextNodeInstance, RouteContext context) {
033            if (context.getNodeInstance().getBranch().getJoinNode() != null) {
034                nextNodeInstance = context.getNodeInstance().getBranch().getJoinNode();
035            } else{
036                getRouteHelper().getJoinEngine().createExpectedJoinState(context, nextNodeInstance, context.getNodeInstance());
037            }
038            getRouteHelper().getJoinEngine().addActualJoiner(nextNodeInstance, context.getNodeInstance().getBranch());
039            return nextNodeInstance;
040        }
041        
042        public ProcessResult isComplete(RouteContext context) throws Exception {
043            RouteNodeInstance nodeInstance = context.getNodeInstance();
044                    JoinNode node = (JoinNode)getNode(nodeInstance.getRouteNode(), JoinNode.class);
045                    return node.process(context, getRouteHelper());
046        }
047    
048    }