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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 java.util.List;
22  import javax.servlet.Servlet;
23  import javax.servlet.ServletConfig;
24  
25  import org.apache.commons.collections.iterators.EnumerationIterator;
26  import org.apache.commons.configuration.PropertyConverter;
27  
28  /***
29   * A configuration wrapper around a {@link ServletConfig}. This configuration
30   * is read only, adding or removing a property will throw an
31   * UnsupportedOperationException.
32   *
33   * @author <a href="mailto:ebourg@apache.org">Emmanuel Bourg</a>
34   * @version $Revision: 439648 $, $Date: 2006-09-02 22:42:10 +0200 (Sa, 02 Sep 2006) $
35   * @since 1.1
36   */
37  public class ServletConfiguration extends BaseWebConfiguration
38  {
39      /*** Stores a reference to the wrapped <code>ServletConfig</code>.*/
40      protected ServletConfig config;
41  
42      /***
43       * Create a ServletConfiguration using the initialization parameter of
44       * the specified servlet.
45       *
46       * @param servlet the servlet
47       */
48      public ServletConfiguration(Servlet servlet)
49      {
50          this(servlet.getServletConfig());
51      }
52  
53      /***
54       * Create a ServletConfiguration using the servlet initialization parameters.
55       *
56       * @param config the servlet configuration
57       */
58      public ServletConfiguration(ServletConfig config)
59      {
60          this.config = config;
61      }
62  
63      public Object getProperty(String key)
64      {
65          Object value = config.getInitParameter(key);
66          if (!isDelimiterParsingDisabled())
67          {
68              List list = PropertyConverter.split((String) value, getListDelimiter());
69              value = list.size() > 1 ? list : value;
70          }
71  
72          return value;
73      }
74  
75      public Iterator getKeys()
76      {
77          return new EnumerationIterator(config.getInitParameterNames());
78      }
79  }