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1   /*
2    * Copyright 2005-2007 The Kuali Foundation
3    * 
4    * 
5    * Licensed under the Educational Community License, Version 2.0 (the "License");
6    * you may not use this file except in compliance with the License.
7    * You may obtain a copy of the License at
8    * 
9    * http://www.opensource.org/licenses/ecl2.php
10   * 
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.kuali.rice.kew.engine.transition;
18  
19  import org.kuali.rice.kew.engine.RouteContext;
20  import org.kuali.rice.kew.engine.node.Process;
21  import org.kuali.rice.kew.engine.node.*;
22  import org.kuali.rice.kew.exception.WorkflowException;
23  
24  import java.util.ArrayList;
25  import java.util.List;
26  
27  
28  /**
29   * Handles transitions into and out of {@link SubProcessNode} nodes.
30   * 
31   * @see SubProcessNode
32   *
33   * @author Kuali Rice Team (rice.collab@kuali.org)
34   */
35  public class SubProcessTransitionEngine extends TransitionEngine {
36      
37      public RouteNodeInstance transitionTo(RouteNodeInstance nextNodeInstance, RouteContext context) throws Exception {
38          String processName = nextNodeInstance.getRouteNode().getRouteNodeName();
39          Process process = context.getDocument().getDocumentType().getNamedProcess(processName);
40          if (process == null) {
41              throw new WorkflowException("Could not locate named sub process: " + processName);
42          }
43          RouteNodeInstance subProcessNodeInstance = nextNodeInstance;
44          subProcessNodeInstance.setInitial(false);
45          subProcessNodeInstance.setActive(false);
46          nextNodeInstance = getRouteHelper().getNodeFactory().createRouteNodeInstance(subProcessNodeInstance.getDocumentId(), process.getInitialRouteNode());
47          nextNodeInstance.setBranch(subProcessNodeInstance.getBranch());
48          nextNodeInstance.setProcess(subProcessNodeInstance);
49  	    return nextNodeInstance;
50  	}
51  
52  	public ProcessResult isComplete(RouteContext context) throws Exception {
53          throw new UnsupportedOperationException("isComplete() should not be invoked on a SubProcess!");
54      }
55  
56      public Transition transitionFrom(RouteContext context, ProcessResult processResult) throws Exception {
57  		RouteNodeInstance processInstance = context.getNodeInstance().getProcess();
58          processInstance.setComplete(true);
59  		SubProcessNode node = (SubProcessNode)getNode(processInstance.getRouteNode(), SubProcessNode.class);
60  		SubProcessResult result = node.process(context);
61  		List<RouteNodeInstance> nextNodeInstances = new ArrayList<RouteNodeInstance>();
62  		if (result.isComplete()) {
63  			List<RouteNode> nextNodes = processInstance.getRouteNode().getNextNodes();
64              for (RouteNode nextNode : nextNodes)
65              {
66                  RouteNodeInstance nextNodeInstance = getRouteHelper().getNodeFactory().createRouteNodeInstance(processInstance.getDocumentId(), nextNode);
67                  nextNodeInstance.setBranch(processInstance.getBranch());
68                  nextNodeInstance.setProcess(processInstance.getProcess());
69                  nextNodeInstances.add(nextNodeInstance);
70              }
71  		}
72  		return new Transition(nextNodeInstances);
73  	}
74  
75  }