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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.ServletConfig;
23  
24  import org.apache.commons.collections.iterators.EnumerationIterator;
25  
26  /***
27   * A configuration wrapper around a {@link ServletConfig}. This configuration
28   * is read only, adding or removing a property will throw an
29   * 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 ServletConfiguration extends BaseWebConfiguration
36  {
37      /*** Stores a reference to the wrapped <code>ServletConfig</code>.*/
38      protected ServletConfig config;
39  
40      /***
41       * Create a ServletConfiguration using the initialization parameter of
42       * the specified servlet.
43       *
44       * @param servlet the servlet
45       */
46      public ServletConfiguration(Servlet servlet)
47      {
48          this(servlet.getServletConfig());
49      }
50  
51      /***
52       * Create a ServletConfiguration using the servlet initialization parameters.
53       *
54       * @param config the servlet configuration
55       */
56      public ServletConfiguration(ServletConfig config)
57      {
58          this.config = config;
59      }
60  
61      public Object getProperty(String key)
62      {
63          return handleDelimiters(config.getInitParameter(key));
64      }
65  
66      public Iterator getKeys()
67      {
68          return new EnumerationIterator(config.getInitParameterNames());
69      }
70  }