/*

  * 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.commons.configuration.web;

 import java.util.Collections;

 import java.util.Enumeration;

 import java.util.Iterator;

 import javax.servlet.Servlet;

 import javax.servlet.ServletConfig;

 /**

  * A configuration wrapper around a {@link ServletConfig}. This configuration

  * is read only, adding or removing a property will throw an

  * UnsupportedOperationException.

  *

  * @author <a href="mailto:ebourg@apache.org">Emmanuel Bourg</a>

  * @version $Id: ServletConfiguration.java 1211128 2011-12-06 20:56:41Z oheger $

  * @since 1.1

  */

 public class ServletConfiguration extends BaseWebConfiguration

 {

     /** Stores a reference to the wrapped {@code ServletConfig}.*/

     protected ServletConfig config;

     /**

      * Create a ServletConfiguration using the initialization parameter of

      * the specified servlet.

      *

      * @param servlet the servlet

      */

     public ServletConfiguration(Servlet servlet)

     {

         this(servlet.getServletConfig());

     }

     /**

      * Create a ServletConfiguration using the servlet initialization parameters.

      *

      * @param config the servlet configuration

      */

     public ServletConfiguration(ServletConfig config)

     {

         this.config = config;

     }

     public Object getProperty(String key)

     {

         return handleDelimiters(config.getInitParameter(key));

     }

     public Iterator<String> getKeys()

     {

         // According to the documentation of getInitParameterNames() the

         // enumeration is of type String.

         @SuppressWarnings("unchecked")

         Enumeration<String> en = config.getInitParameterNames();

         return Collections.list(en).iterator();

     }

 }