KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > nextapp > echo2 > webrender > WebRenderServletException


1 /*
2  * This file is part of the Echo Web Application Framework (hereinafter "Echo").
3  * Copyright (C) 2002-2005 NextApp, Inc.
4  *
5  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
6  *
7  * The contents of this file are subject to the Mozilla Public License Version
8  * 1.1 (the "License"); you may not use this file except in compliance with
9  * the License. You may obtain a copy of the License at
10  * http://www.mozilla.org/MPL/
11  *
12  * Software distributed under the License is distributed on an "AS IS" basis,
13  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14  * for the specific language governing rights and limitations under the
15  * License.
16  *
17  * Alternatively, the contents of this file may be used under the terms of
18  * either the GNU General Public License Version 2 or later (the "GPL"), or
19  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
20  * in which case the provisions of the GPL or the LGPL are applicable instead
21  * of those above. If you wish to allow use of your version of this file only
22  * under the terms of either the GPL or the LGPL, and not to allow others to
23  * use your version of this file under the terms of the MPL, indicate your
24  * decision by deleting the provisions above and replace them with the notice
25  * and other provisions required by the GPL or the LGPL. If you do not delete
26  * the provisions above, a recipient may use your version of this file under
27  * the terms of any one of the MPL, the GPL or the LGPL.
28  */
29
30 package nextapp.echo2.webrender;
31
32 /**
33  * A generic runtime exception to handle circumstances that should
34  * almost never happen. This class should be used to wrap checked exceptions
35  * that shouldn't be possible to occur, instead of swallowing them.
36  */
37 public class WebRenderServletException extends RuntimeException JavaDoc {
38
39     private Throwable JavaDoc cause;
40     
41     /**
42      * Creates a new EchoServletException with a description of its cause.
43      *
44      * @param message A message describing the exception.
45      */
46     public WebRenderServletException(String JavaDoc message) {
47         super(message);
48         
49         cause = this;
50     }
51
52     /**
53      * Creates a new EchoServletException with a description of its cause that
54      * wraps another exception.
55      *
56      * @param message A message describing the exception.
57      * @param cause The exception which caused this exception to be thrown.
58      */
59     public WebRenderServletException(String JavaDoc message, Throwable JavaDoc cause) {
60         super(message);
61         
62         this.cause = cause;
63     }
64     
65     /**
66      * Returns the wrapped exception that caused this exception to be thrown.
67      * If the root cause was not a wrapped exception or is this object, null
68      * is returned.
69      *
70      * @return The cause of this exception.
71      */
72     public Throwable JavaDoc getCause() {
73         return cause == this ? null : cause;
74     }
75 }
76
Popular Tags