/**
    * Copyright 2005-2012 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.RouteHelper;
  import org.kuali.rice.kew.engine.node.*;
  
  import java.util.ArrayList;
  import java.util.List;
  
  
  /**
   * Handles transitions into and out of {@link SplitNode} nodes.
   * 
   * @see SplitNode
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class SplitTransitionEngine extends TransitionEngine {
  	
      public ProcessResult isComplete(RouteContext context) throws Exception {
          SplitNode node = (SplitNode)getNode(context.getNodeInstance().getRouteNode(), SplitNode.class);
          return node.process(context, getRouteHelper());
      }
      
  	public Transition transitionFrom(RouteContext context, ProcessResult processResult)
  			throws Exception {
  		RouteNodeInstance splitInstance = context.getNodeInstance();
  		List<RouteNodeInstance> nextNodeInstances = new ArrayList<RouteNodeInstance>();
          SplitResult result = (SplitResult)processResult;
          for (String branchName : result.getBranchNames())
          {
              for (RouteNode routeNode : splitInstance.getRouteNode().getNextNodes())
              {
                  if (routeNode.getBranch() != null && routeNode.getBranch().getName().equals(branchName))
                  {
                      nextNodeInstances.add(createSplitChild(branchName, routeNode, splitInstance));
                  }
              }
          }
  		return new Transition(nextNodeInstances);
  	}
  	
  	public static RouteNodeInstance createSplitChild(String branchName, RouteNode routeNode, RouteNodeInstance splitInstance) {
  	    RouteHelper routeHelper = new RouteHelper();
  	    RouteNodeInstance nextNodeInstance = routeHelper.getNodeFactory().createRouteNodeInstance(splitInstance.getDocumentId(), routeNode);
  		Branch branch = routeHelper.getNodeFactory().createBranch(branchName, splitInstance.getBranch(), nextNodeInstance);
  		branch.setSplitNode(splitInstance);
  		nextNodeInstance.setBranch(branch);
  		nextNodeInstance.setProcess(splitInstance.getProcess());
  		return nextNodeInstance;
  	}
  	
  }