01: /*
02: * Copyright 2002,2004 The Apache Software Foundation.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16:
17: package org.apache.commons.jelly.util;
18:
19: import java.io.PrintStream;
20: import java.io.PrintWriter;
21:
22: /**
23: * A {@link RuntimeException} which is nested to preserve stack traces.
24: *
25: * This class allows the following code to be written to convert a regular
26: * Exception into a {@link RuntimeException} without losing the stack trace.
27: *
28: * <pre>
29: * try {
30: * ...
31: * } catch (Exception e) {
32: * throw new RuntimeException(e);
33: * }
34: * </pre>
35: *
36: * @author James Strachan
37: * @version $Revision: 155420 $
38: */
39:
40: public class NestedRuntimeException extends RuntimeException {
41:
42: /**
43: * Holds the reference to the exception or error that caused
44: * this exception to be thrown.
45: */
46: private Throwable cause = null;
47:
48: /**
49: * Constructs a new <code>NestedRuntimeException</code> with specified
50: * nested <code>Throwable</code>.
51: *
52: * @param cause the exception or error that caused this exception to be
53: * thrown
54: */
55: public NestedRuntimeException(Throwable cause) {
56: super (cause.getMessage());
57: this .cause = cause;
58: }
59:
60: /**
61: * Constructs a new <code>NestedRuntimeException</code> with specified
62: * detail message and nested <code>Throwable</code>.
63: *
64: * @param msg the error message
65: * @param cause the exception or error that caused this exception to be
66: * thrown
67: */
68: public NestedRuntimeException(String msg, Throwable cause) {
69: super (msg);
70: this .cause = cause;
71: }
72:
73: public Throwable getCause() {
74: return cause;
75: }
76:
77: public void printStackTrace() {
78: cause.printStackTrace();
79: }
80:
81: public void printStackTrace(PrintStream out) {
82: cause.printStackTrace(out);
83: }
84:
85: public void printStackTrace(PrintWriter out) {
86: cause.printStackTrace(out);
87: }
88:
89: }
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