/*
    * Copyright 2008-2009 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.ole.sys.document.workflow;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.kuali.ole.sys.context.SpringContext;
  import org.kuali.ole.sys.document.FinancialSystemDocument;
  import org.kuali.ole.sys.document.FinancialSystemMaintenanceDocument;
  import org.kuali.ole.sys.document.FinancialSystemTransactionalDocument;
  import org.kuali.rice.kew.engine.RouteContext;
  import org.kuali.rice.kew.engine.RouteHelper;
  import org.kuali.rice.kew.engine.node.SplitNode;
  import org.kuali.rice.kew.engine.node.SplitResult;
  import org.kuali.rice.krad.document.Document;
  import org.kuali.rice.krad.service.DocumentService;
  
  public class SimpleBooleanSplitNode implements SplitNode {
  
      /**
       * @see org.kuali.rice.kew.engine.node.SimpleNode#process(org.kuali.rice.kew.engine.RouteContext, org.kuali.rice.kew.engine.RouteHelper)
       */
      @Override
      public SplitResult process(RouteContext context, RouteHelper helper) throws Exception {
          SplitResult result = null;
          String documentID = context.getDocument().getDocumentId();
          Document document = SpringContext.getBean(DocumentService.class).getByDocumentHeaderId(documentID);
          if (document instanceof FinancialSystemDocument) {
          String nodeName = context.getNodeInstance().getRouteNode().getRouteNodeName();
              boolean ret = ((FinancialSystemDocument)document).answerSplitNodeQuestion(nodeName);
              result = booleanToSplitResult(ret);
          } else {
              throw new IllegalArgumentException("Document "+document.getDocumentTitle() +" with id " + documentID + " is not an instance of " + FinancialSystemMaintenanceDocument.class + " or " + FinancialSystemTransactionalDocument.class);
          }
          
          return result;
      }
      
      /**
       * Converts a boolean value to SplitResult where the branch name is "True" or "False" based on the value of the given boolean
       * @param b a boolean to convert to a SplitResult
       * @return the converted SplitResult
       */
      protected SplitResult booleanToSplitResult(boolean b) {
          List<String> branches = new ArrayList<String>();
          final String branchName = b ? "True" : "False";
          branches.add(branchName);
          return new SplitResult(branches);
      }
  
  }