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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.commons.configuration.web;
19  
20  import java.util.Iterator;
21  import javax.servlet.Servlet;
22  import javax.servlet.ServletContext;
23  
24  import org.apache.commons.collections.iterators.EnumerationIterator;
25  
26  /***
27   * A configuration wrapper to read the initialization parameters of a servlet
28   * context. This configuration is read only, adding or removing a property will
29   * throw an UnsupportedOperationException.
30   *
31   * @author <a href="mailto:ebourg@apache.org">Emmanuel Bourg</a>
32   * @version $Revision: 515306 $, $Date: 2007-03-06 22:15:00 +0100 (Di, 06 Mrz 2007) $
33   * @since 1.1
34   */
35  public class ServletContextConfiguration extends BaseWebConfiguration
36  {
37      /*** Stores the wrapped servlet context.*/
38      protected ServletContext context;
39  
40      /***
41       * Create a ServletContextConfiguration using the context of
42       * the specified servlet.
43       *
44       * @param servlet the servlet
45       */
46      public ServletContextConfiguration(Servlet servlet)
47      {
48          this.context = servlet.getServletConfig().getServletContext();
49      }
50  
51      /***
52       * Create a ServletContextConfiguration using the servlet context
53       * initialization parameters.
54       *
55       * @param context the servlet context
56       */
57      public ServletContextConfiguration(ServletContext context)
58      {
59          this.context = context;
60      }
61  
62      public Object getProperty(String key)
63      {
64          return handleDelimiters(context.getInitParameter(key));
65      }
66  
67      public Iterator getKeys()
68      {
69          return new EnumerationIterator(context.getInitParameterNames());
70      }
71  }