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.ServletContext;
26
27 /**
28 * A configuration wrapper to read the initialization parameters of a servlet
29 * context. This configuration is read only, adding or removing a property will
30 * throw an UnsupportedOperationException.
31 *
32 * @author <a href="mailto:ebourg@apache.org">Emmanuel Bourg</a>
33 * @version $Id: ServletContextConfiguration.java 1211129 2011-12-06 20:57:01Z oheger $
34 * @since 1.1
35 */
36 public class ServletContextConfiguration extends BaseWebConfiguration
37 {
38 /** Stores the wrapped servlet context.*/
39 protected ServletContext context;
40
41 /**
42 * Create a ServletContextConfiguration using the context of
43 * the specified servlet.
44 *
45 * @param servlet the servlet
46 */
47 public ServletContextConfiguration(Servlet servlet)
48 {
49 this.context = servlet.getServletConfig().getServletContext();
50 }
51
52 /**
53 * Create a ServletContextConfiguration using the servlet context
54 * initialization parameters.
55 *
56 * @param context the servlet context
57 */
58 public ServletContextConfiguration(ServletContext context)
59 {
60 this.context = context;
61 }
62
63 public Object getProperty(String key)
64 {
65 return handleDelimiters(context.getInitParameter(key));
66 }
67
68 public Iterator<String> getKeys()
69 {
70 // According to the documentation of getInitParameterNames() the
71 // enumeration is of type String.
72 @SuppressWarnings("unchecked")
73 Enumeration<String> en = context.getInitParameterNames();
74 return Collections.list(en).iterator();
75 }
76 }