/*

  * $Id: HeaderExtractor.java 1066499 2011-02-02 15:33:34Z 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.servlet.extractor;

 import java.util.Enumeration;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

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

 /**

  * Extract header values from an HTTP request.

  *

  * @version $Rev: 1066499 $ $Date: 2011-02-03 02:33:34 +1100 (Thu, 03 Feb 2011) $

  */

 public class HeaderExtractor implements EnumeratedValuesExtractor {

     /**

      * The request.

      */

     private HttpServletRequest request;

     /**

      * The response.

      */

     private HttpServletResponse response;

     /**

      * Constructor.

      *

      * @param request The request.

      * @param response The response.

      */

     public HeaderExtractor(HttpServletRequest request,

             HttpServletResponse response) {

         this.request = request;

         this.response = response;

     }

     @SuppressWarnings("unchecked")

     @Override

     public Enumeration<String> getKeys() {

         return request.getHeaderNames();

    }

     @Override

     public String getValue(String key) {

         return request.getHeader(key);

     }

     @SuppressWarnings("unchecked")

     @Override

     public Enumeration<String> getValues(String key) {

         return request.getHeaders(key);

     }

     @Override

     public void setValue(String key, String value) {

         response.setHeader(key, value);

     }

 }