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.Servlet;
25 import javax.servlet.ServletConfig;
26
27 /**
28 * A configuration wrapper around a {@link ServletConfig}. This configuration
29 * is 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 $Id: ServletConfiguration.java 1211128 2011-12-06 20:56:41Z oheger $
34 * @since 1.1
35 */
36 public class ServletConfiguration extends BaseWebConfiguration
37 {
38 /** Stores a reference to the wrapped {@code ServletConfig}.*/
39 protected ServletConfig config;
40
41 /**
42 * Create a ServletConfiguration using the initialization parameter of
43 * the specified servlet.
44 *
45 * @param servlet the servlet
46 */
47 public ServletConfiguration(Servlet servlet)
48 {
49 this(servlet.getServletConfig());
50 }
51
52 /**
53 * Create a ServletConfiguration using the servlet initialization parameters.
54 *
55 * @param config the servlet configuration
56 */
57 public ServletConfiguration(ServletConfig config)
58 {
59 this.config = config;
60 }
61
62 public Object getProperty(String key)
63 {
64 return handleDelimiters(config.getInitParameter(key));
65 }
66
67 public Iterator<String> getKeys()
68 {
69 // According to the documentation of getInitParameterNames() the
70 // enumeration is of type String.
71 @SuppressWarnings("unchecked")
72 Enumeration<String> en = config.getInitParameterNames();
73 return Collections.list(en).iterator();
74 }
75 }