/*

  * $Id: AddableParameterMap.java 1064782 2011-01-28 17:08:52Z 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.collection;

 import java.util.Collection;

 import java.util.Map;

 import java.util.Set;

 import org.apache.tiles.request.attribute.HasAddableKeys;

 /**

  * Exposes an {@link HasAddableKeys} object as a put/get (no remove) map.

  *

  * @version $Rev: 1064782 $ $Date: 2011-01-29 04:08:52 +1100 (Sat, 29 Jan 2011) $

  */

 public class AddableParameterMap extends ReadOnlyEnumerationMap<String> {

     /**

      * The request.

      */

     private HasAddableKeys<String> request;

     /**

      * Constructor.

      *

      * @param request The request object to use.

      */

     public AddableParameterMap(HasAddableKeys<String> request) {

         super(request);

         this.request = request;

     }

     /** {@inheritDoc} */

     public Set<Map.Entry<String, String>> entrySet() {

         return new AddableParameterEntrySet();

     }

     /** {@inheritDoc} */

     public String put(String key, String value) {

         String oldValue = request.getValue(key);

         request.setValue(key, value);

         return oldValue;

     }

     /** {@inheritDoc} */

     public void putAll(Map<? extends String, ? extends String> map) {

         for (Map.Entry<? extends String, ? extends String> entry : map

                 .entrySet()) {

             request.setValue(entry.getKey(), entry.getValue());

         }

     }

     /**

      * Entry set implementation for {@link AddableParameterMap}.

      */

     private class AddableParameterEntrySet extends ReadOnlyEnumerationMap<String>.ReadOnlyEnumerationMapEntrySet {

         @Override

         public boolean add(java.util.Map.Entry<String, String> e) {

             request.setValue(e.getKey(), e.getValue());

             return true;

         }

         @Override

         public boolean addAll(

                 Collection<? extends java.util.Map.Entry<String, String>> c) {

             for (Map.Entry<String, String> entry : c) {

                 request.setValue(entry.getKey(), entry.getValue());

             }

             return true;

         }

     }

 }