/*

  * $Id: VelocityScopeMap.java 942431 2010-05-08 18:05:19Z apetrelli $

  *

  * 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.tiles.request.velocity;

 import java.util.HashSet;

 import java.util.Set;

 import org.apache.tiles.request.collection.ScopeMap;

 import org.apache.tiles.request.velocity.extractor.VelocityScopeExtractor;

 import org.apache.velocity.context.Context;

 /**

  * <p>Private implementation of <code>Map</code> for servlet request

  * attributes.</p>

  *

  * @version $Rev: 942431 $ $Date: 2010-05-09 04:05:19 +1000 (Sun, 09 May 2010) $

  */

 final class VelocityScopeMap extends ScopeMap {

     /**

      * The request object to use.

      */

     private Context request = null;

     /**

      * Constructor.

      *

      * @param request The request object to use.

      */

     public VelocityScopeMap(Context request) {

         super(new VelocityScopeExtractor(request));

         this.request = request;

     }

     @Override

     public Object remove(Object key) {

         return request.remove(key);

     }

     @Override

     public Object put(String key, Object value) {

         return request.put(key, value);

     }

     /** {@inheritDoc} */

     public boolean containsKey(Object key) {

         return request.containsKey(key);

     }

     /** {@inheritDoc} */

     public boolean isEmpty() {

         return size() < 1;

     }

     /** {@inheritDoc} */

     public Set<String> keySet() {

         Set<String> set = new HashSet<String>();

         for (Object key : request.getKeys()) {

             set.add((String) key);

         }

         return (set);

     }

     /** {@inheritDoc} */

     public int size() {

         return request.getKeys().length;

     }

 }