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org.apache.commons.jelly.util.NestedRuntimeException |
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1 | /* |
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2 | * Copyright 2002,2004 The Apache Software Foundation. |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
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6 | * You may obtain a copy of the License at |
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7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | */ |
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16 | ||
17 | package org.apache.commons.jelly.util; |
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18 | ||
19 | import java.io.PrintStream; |
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20 | import java.io.PrintWriter; |
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21 | ||
22 | /** |
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23 | * A {@link RuntimeException} which is nested to preserve stack traces. |
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24 | * |
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25 | * This class allows the following code to be written to convert a regular |
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26 | * Exception into a {@link RuntimeException} without losing the stack trace. |
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27 | * |
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28 | * <pre> |
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29 | * try { |
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30 | * ... |
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31 | * } catch (Exception e) { |
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32 | * throw new RuntimeException(e); |
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33 | * } |
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34 | * </pre> |
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35 | * |
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36 | * @author James Strachan |
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37 | * @version $Revision: 1.2 $ |
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38 | */ |
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39 | ||
40 | public class NestedRuntimeException extends RuntimeException { |
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41 | ||
42 | /** |
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43 | * Holds the reference to the exception or error that caused |
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44 | * this exception to be thrown. |
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45 | */ |
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46 | 0 | private Throwable cause = null; |
47 | ||
48 | /** |
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49 | * Constructs a new <code>NestedRuntimeException</code> with specified |
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50 | * nested <code>Throwable</code>. |
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51 | * |
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52 | * @param cause the exception or error that caused this exception to be |
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53 | * thrown |
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54 | */ |
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55 | public NestedRuntimeException(Throwable cause) { |
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56 | 0 | super(cause.getMessage()); |
57 | 0 | this.cause = cause; |
58 | 0 | } |
59 | ||
60 | /** |
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61 | * Constructs a new <code>NestedRuntimeException</code> with specified |
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62 | * detail message and nested <code>Throwable</code>. |
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63 | * |
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64 | * @param msg the error message |
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65 | * @param cause the exception or error that caused this exception to be |
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66 | * thrown |
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67 | */ |
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68 | public NestedRuntimeException(String msg, Throwable cause) { |
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69 | 0 | super(msg); |
70 | 0 | this.cause = cause; |
71 | 0 | } |
72 | ||
73 | public Throwable getCause() { |
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74 | 0 | return cause; |
75 | } |
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76 | ||
77 | public void printStackTrace() { |
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78 | 0 | cause.printStackTrace(); |
79 | 0 | } |
80 | ||
81 | public void printStackTrace(PrintStream out) { |
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82 | 0 | cause.printStackTrace(out); |
83 | 0 | } |
84 | ||
85 | public void printStackTrace(PrintWriter out) { |
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86 | 0 | cause.printStackTrace(out); |
87 | 0 | } |
88 | ||
89 | } |
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