KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > lateralnz > panther > util > ContextUtils


1 /* ====================================================================
2  * The LateralNZ Software License, Version 1.0
3  *
4  * Copyright (c) 2003 LateralNZ. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  * notice, this list of conditions and the following disclaimer.
12  *
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in
15  * the documentation and/or other materials provided with the
16  * distribution.
17  *
18  * 3. The end-user documentation included with the redistribution,
19  * if any, must include the following acknowledgment:
20  * "This product includes software developed by
21  * LateralNZ (http://www.lateralnz.org/) and other third parties."
22  * Alternately, this acknowledgment may appear in the software itself,
23  * if and wherever such third-party acknowledgments normally appear.
24  *
25  * 4. The names "LateralNZ" must not be used to endorse or promote
26  * products derived from this software without prior written
27  * permission. For written permission, please
28  * contact oss@lateralnz.org.
29  *
30  * 5. Products derived from this software may not be called "Panther",
31  * or "Lateral" or "LateralNZ", nor may "PANTHER" or "LATERAL" or
32  * "LATERALNZ" appear in their name, without prior written
33  * permission of LateralNZ.
34  *
35  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38  * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
39  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46  * SUCH DAMAGE.
47  * ====================================================================
48  *
49  * This software consists of voluntary contributions made by many
50  * individuals on behalf of LateralNZ. For more
51  * information on Lateral, please see http://www.lateralnz.com/ or
52  * http://www.lateralnz.org
53  *
54  */
55 package org.lateralnz.panther.util;
56
57
58 import javax.naming.Context JavaDoc;
59 import javax.naming.NameAlreadyBoundException JavaDoc;
60 import javax.naming.NameNotFoundException JavaDoc;
61 import javax.naming.NamingException JavaDoc;
62
63 import org.lateralnz.common.util.Constants;
64 import org.lateralnz.panther.naming.LocalContext;
65
66 /**
67  * general naming utility functions
68  *
69  * @author J R Briggs
70  */
71 public class ContextUtils implements Constants {
72   
73   private static final String JavaDoc JAVA = "java";
74   private static final String JavaDoc ENV = "env";
75   private static final String JavaDoc COMP = "comp";
76   
77   private static final String JavaDoc JAVA_COMP = JAVA + COLON + COMP;
78   private static final String JavaDoc JAVA_COMP_ENV = JAVA + COLON + COMP + FORWARD_SLASH + ENV;
79   
80   private ContextUtils() {
81   }
82
83  /**
84   * get the "java:comp/env" context, and if it doesn't exist
85   * create a context for it.
86   * @param ctx the context in which to look for the java:comp/env subcontext
87   */
88   public static final Context JavaDoc getCompEnv(Context JavaDoc ctx) throws NamingException JavaDoc {
89     try {
90       ctx.createSubcontext(JAVA_COMP);
91     }
92     catch (NameAlreadyBoundException JavaDoc nabe) { }
93     
94     try {
95       ctx.createSubcontext(JAVA_COMP_ENV);
96     }
97     catch (NameAlreadyBoundException JavaDoc nabe) { }
98     
99     return (Context JavaDoc)ctx.lookup(JAVA_COMP_ENV);
100   }
101 }
Popular Tags