1 // ========================================================================
2 // Copyright (c) 1999-2009 Mort Bay Consulting Pty. Ltd.
3 // ------------------------------------------------------------------------
4 // All rights reserved. This program and the accompanying materials
5 // are made available under the terms of the Eclipse Public License v1.0
6 // and Apache License v2.0 which accompanies this distribution.
7 // The Eclipse Public License is available at
8 // http://www.eclipse.org/legal/epl-v10.html
9 // The Apache License v2.0 is available at
10 // http://www.opensource.org/licenses/apache2.0.php
11 // You may elect to redistribute this code under either of these licenses.
12 // ========================================================================
13
14 package org.eclipse.jetty.jndi.java;
15
16 import java.util.Hashtable;
17
18 import javax.naming.Context;
19 import javax.naming.Name;
20 import javax.naming.NamingException;
21 import javax.naming.spi.ObjectFactory;
22
23 import org.eclipse.jetty.util.log.Log;
24
25
26 /** javaURLContextFactory
27 * <p>This is the URL context factory for the java: URL.
28 *
29 * <p><h4>Notes</h4>
30 * <p>
31 *
32 * <p><h4>Usage</h4>
33 * <pre>
34 */
35 /*
36 * </pre>
37 *
38 * @see
39 *
40 *
41 * @version 1.0
42 */
43 public class javaURLContextFactory implements ObjectFactory
44 {
45
46 /**
47 * Either return a new context or the resolution of a url.
48 *
49 * @param url an <code>Object</code> value
50 * @param name a <code>Name</code> value
51 * @param ctx a <code>Context</code> value
52 * @param env a <code>Hashtable</code> value
53 * @return a new context or the resolved object for the url
54 * @exception Exception if an error occurs
55 */
56 public Object getObjectInstance(Object url, Name name, Context ctx, Hashtable env)
57 throws Exception
58 {
59 // null object means return a root context for doing resolutions
60 if (url == null)
61 {
62 if(Log.isDebugEnabled())Log.debug(">>> new root context requested ");
63 return new javaRootURLContext(env);
64 }
65
66 // return the resolution of the url
67 if (url instanceof String)
68 {
69 if(Log.isDebugEnabled())Log.debug(">>> resolution of url "+url+" requested");
70 Context rootctx = new javaRootURLContext (env);
71 return rootctx.lookup ((String)url);
72 }
73
74 // return the resolution of at least one of the urls
75 if (url instanceof String[])
76 {
77 if(Log.isDebugEnabled())Log.debug(">>> resolution of array of urls requested");
78 String[] urls = (String[])url;
79 Context rootctx = new javaRootURLContext (env);
80 Object object = null;
81 NamingException e = null;
82 for (int i=0;(i< urls.length) && (object == null); i++)
83 {
84 try
85 {
86 object = rootctx.lookup (urls[i]);
87 }
88 catch (NamingException x)
89 {
90 e = x;
91 }
92 }
93
94 if (object == null)
95 throw e;
96 else
97 return object;
98 }
99
100 if(Log.isDebugEnabled())Log.debug(">>> No idea what to do, so return a new root context anyway");
101 return new javaRootURLContext (env);
102 }
103 };