01: /*
02: * This file is part of the Echo Web Application Framework (hereinafter "Echo").
03: * Copyright (C) 2002-2005 NextApp, Inc.
04: *
05: * Version: MPL 1.1/GPL 2.0/LGPL 2.1
06: *
07: * The contents of this file are subject to the Mozilla Public License Version
08: * 1.1 (the "License"); you may not use this file except in compliance with
09: * 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 {
38:
39: private Throwable 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 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 message, Throwable 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 getCause() {
73: return cause == this ? null : cause;
74: }
75: }
|