/*
    * 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.shared.context.flash;
  
  import java.io.Serializable;
  import java.util.Map;
  import javax.faces.FacesWrapper;
  import javax.faces.context.FacesContext;
  import javax.faces.context.Flash;
  import org.apache.commons.collections.map.LRUMap;
  
  /**
   *
   */
  class ClientWindowFlashTokenLRUMap extends LRUMap implements Serializable
  {
  
      public ClientWindowFlashTokenLRUMap()
      {
      }
  
      public ClientWindowFlashTokenLRUMap(int maxSize)
      {
          super(maxSize);
      }
  
      public ClientWindowFlashTokenLRUMap(int maxSize, boolean scanUntilRemovable)
      {
          super(maxSize, scanUntilRemovable);
      }
  
      public ClientWindowFlashTokenLRUMap(int maxSize, float loadFactor)
      {
          super(maxSize, loadFactor);
      }
  
      public ClientWindowFlashTokenLRUMap(int maxSize, float loadFactor, boolean scanUntilRemovable)
      {
          super(maxSize, loadFactor, scanUntilRemovable);
      }
  
      public ClientWindowFlashTokenLRUMap(Map map)
      {
          super(map);
      }
  
      public ClientWindowFlashTokenLRUMap(Map map, boolean scanUntilRemovable)
      {
          super(map, scanUntilRemovable);
      }
      
      @Override
      protected boolean removeLRU(LinkEntry entry)
      {
          FacesContext facesContext = FacesContext.getCurrentInstance();
          Flash flash = facesContext.getExternalContext().getFlash();
          if (flash != null)
          {
              ReleasableFlash rf = null;
              while (flash != null)
              {
                  if (flash instanceof ReleasableFlash)
                  {
                      rf = (ReleasableFlash) flash;
                      break;
                  }
                  if (flash instanceof FacesWrapper)
                  {
                      flash = ((FacesWrapper<? extends Flash>) flash).getWrapped();
                  }
                  else
                  {
                      flash = null;
                  }
              }
              if (rf != null)
              {
                  rf.clearFlashMap(facesContext, (String) entry.getKey(), (String) entry.getValue());
              }
          }
          return super.removeLRU(entry);
      }
 }