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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.RouteHelper;
20  import org.kuali.rice.kew.engine.node.RouteNode;
21  import org.kuali.rice.kew.engine.node.RouteNodeInstance;
22  import org.kuali.rice.kew.exception.WorkflowException;
23  
24  
25  /**
26   * Factory which creates a {@link TransitionEngine} for the given {@link RouteNodeInstance}.  The 
27   * transition engine is determined based on the type of the node instance.
28   * 
29   * @see TransitionEngine
30   *
31   * @author Kuali Rice Team (rice.collab@kuali.org)
32   */
33  public class TransitionEngineFactory {
34  
35  	public static TransitionEngine createTransitionEngine(RouteNodeInstance nodeInstance) throws Exception {
36  		RouteHelper helper = new RouteHelper();
37  		RouteNode routeNode = nodeInstance.getRouteNode();
38  		TransitionEngine engine = null;
39  		if (helper.isSimpleNode(routeNode)) {
40  			engine = new SimpleTransitionEngine();
41  		} else if (helper.isSplitNode(routeNode)) {
42  			engine = new SplitTransitionEngine();
43  		} else if (helper.isJoinNode(routeNode)) {
44  			engine = new JoinTransitionEngine();
45  		} else if (helper.isDynamicNode(routeNode)) {
46  			engine = new DynamicTransitionEngine();
47  		} else if (helper.isSubProcessNode(routeNode)) {
48  			engine = new SubProcessTransitionEngine();
49  		} else {
50  			throw new WorkflowException("Could not locate transition engine for node " + routeNode.getNodeType());
51  		}
52  		engine.setRouteHelper(helper);
53  		return engine;
54  	}
55  	
56  }