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17 package org.apache.commons.configuration.web;
18
19 import java.util.Iterator;
20 import java.util.List;
21 import javax.servlet.Servlet;
22 import javax.servlet.ServletContext;
23
24 import org.apache.commons.collections.iterators.EnumerationIterator;
25 import org.apache.commons.configuration.PropertyConverter;
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 $Revision$, $Date: 2005-10-12 21:01:43 +0200 (Wed, 12 Oct 2005) $
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 Object value = context.getInitParameter(key);
66 List list = PropertyConverter.split((String) value, getDelimiter());
67
68 return list.size() > 1 ? list : value;
69 }
70
71 public Iterator getKeys()
72 {
73 return new EnumerationIterator(context.getInitParameterNames());
74 }
75 }