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