/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache 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.apache.org/licenses/LICENSE-2.0

  *

  * 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.apache.myfaces.flow.util;

 import java.util.List;

 import javax.faces.context.FacesContext;

 import javax.faces.flow.Flow;

 import org.apache.myfaces.flow.FlowHandlerImpl;

 import org.apache.myfaces.flow.FlowReference;

 /**

  *

  */

 public class FlowUtils

 {

     public static String getFlowMapKey(FacesContext facesContext, FlowReference flowReference)

     {

         Flow flow = null;

         if (flowReference.getDocumentId() == null)

         {

             flow = facesContext.getApplication().getFlowHandler().getFlow(

                 facesContext, "", flowReference.getId());

         }

         else

         {

             flow = facesContext.getApplication().getFlowHandler().getFlow(

                 facesContext, flowReference.getDocumentId(), flowReference.getId());

         }

         if (flow != null)

         {

             return FlowUtils.getFlowMapKey(facesContext, flow);

         }

         return null;

     }    

     public static String getFlowMapKey(FacesContext facesContext, Flow flow)

     {

         String flowMapKey = flow.getClientWindowFlowId(

             facesContext.getExternalContext().getClientWindow());

         int flowIndex = getFlowIndex(facesContext, flow);

         if (flowIndex > 0)

         {

             flowMapKey = flowMapKey + "_" + flowIndex;

         }

         return flowMapKey;

     }

     private static int getFlowIndex(FacesContext facesContext, Flow flow)

     {

         List<Flow> list = FlowHandlerImpl.getActiveFlows(facesContext, 

                 facesContext.getApplication().getFlowHandler());

         FlowReference flowRef = new FlowReference(flow.getDefiningDocumentId(), flow.getId());

         int flowIndex = 0;

         for (Flow f : list)

         {

             FlowReference fr = new FlowReference(f.getDefiningDocumentId(), f.getId());

             if (flowRef.equals(fr))

             {

                 flowIndex++;

             }

         }

         return flowIndex;

     }

 }