View Javadoc

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.Collections;
21  import java.util.Enumeration;
22  import java.util.Iterator;
23  
24  import javax.servlet.FilterConfig;
25  
26  /**
27   * A configuration wrapper around a {@link FilterConfig}. This configuration is
28   * 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 $Id: ServletFilterConfiguration.java 1211130 2011-12-06 20:57:19Z oheger $
33   * @since 1.1
34   */
35  public class ServletFilterConfiguration extends BaseWebConfiguration
36  {
37      /** Stores the wrapped filter config.*/
38      protected FilterConfig config;
39  
40      /**
41       * Create a ServletFilterConfiguration using the filter initialization parameters.
42       *
43       * @param config the filter configuration
44       */
45      public ServletFilterConfiguration(FilterConfig config)
46      {
47          this.config = config;
48      }
49  
50      public Object getProperty(String key)
51      {
52          return handleDelimiters(config.getInitParameter(key));
53      }
54  
55      public Iterator<String> getKeys()
56      {
57          // According to the documentation of getInitParameterNames() the
58          // enumeration is of type String.
59          @SuppressWarnings("unchecked")
60          Enumeration<String> en = config.getInitParameterNames();
61          return Collections.list(en).iterator();
62      }
63  }