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Java > Open Source Codes > org > apache > commons > jelly > util > NestedRuntimeException


1 /*
2  * Copyright 2002,2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
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 JavaDoc;
20 import java.io.PrintWriter JavaDoc;
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 JavaDoc {
41
42     /**
43      * Holds the reference to the exception or error that caused
44      * this exception to be thrown.
45      */
46     private Throwable JavaDoc 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 JavaDoc 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 JavaDoc msg, Throwable JavaDoc cause) {
69         super(msg);
70         this.cause = cause;
71     }
72
73     public Throwable JavaDoc getCause() {
74         return cause;
75     }
76
77     public void printStackTrace() {
78         cause.printStackTrace();
79     }
80
81     public void printStackTrace(PrintStream JavaDoc out) {
82         cause.printStackTrace(out);
83     }
84
85     public void printStackTrace(PrintWriter JavaDoc out) {
86         cause.printStackTrace(out);
87     }
88
89 }
90
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