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 }