1 package org.jaxen; 2 3 import java.io.PrintStream; 4 import java.io.PrintWriter; 5 6 /* 7 * $Header: $ 8 * $Revision: $ 9 * $Date: $ 10 * 11 * ==================================================================== 12 * 13 * Copyright 2000-2005 bob mcwhirter & James Strachan. 14 * All rights reserved. 15 * 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: 20 * 21 * * Redistributions of source code must retain the above copyright 22 * notice, this list of conditions and the following disclaimer. 23 * 24 * * Redistributions in binary form must reproduce the above copyright 25 * notice, this list of conditions and the following disclaimer in the 26 * documentation and/or other materials provided with the distribution. 27 * 28 * * Neither the name of the Jaxen Project nor the names of its 29 * contributors may be used to endorse or promote products derived 30 * from this software without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 33 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 34 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 35 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 36 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 37 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 38 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 39 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 40 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 41 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 42 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 43 * 44 * ==================================================================== 45 * This software consists of voluntary contributions made by many 46 * individuals on behalf of the Jaxen Project and was originally 47 * created by bob mcwhirter <bob@werken.com> and 48 * James Strachan <jstrachan@apache.org>. For more information on the 49 * Jaxen Project, please see <http://www.jaxen.org/>. 50 * 51 * $Id: $ 52 */ 53 54 /** 55 * This class exists to wrap Jaxen exceptions that otherwise wouldn't be propagated 56 * up through the axis iterators. 57 */ 58 public class JaxenRuntimeException extends RuntimeException 59 { 60 /** 61 * 62 */ 63 private static final long serialVersionUID = -930309761511911193L; 64 65 private Throwable cause; 66 private boolean causeSet = false; 67 68 /** 69 * Create a new JaxenRuntimeException. 70 * 71 * @param cause the nested exception that's wrapped 72 * inside this exception 73 */ 74 public JaxenRuntimeException(Throwable cause) 75 { 76 super(cause.getMessage()); 77 initCause(cause); 78 } 79 80 /** 81 * Create a new JaxenRuntimeException. 82 * 83 * @param message the detail message 84 */ 85 public JaxenRuntimeException(String message) { 86 super(message); 87 } 88 89 /** 90 * Returns the exception that caused this exception. 91 * This is necessary to implement Java 1.4 chained exception 92 * functionality in a Java 1.3-compatible way. 93 * 94 * @return the exception that caused this exception 95 */ 96 public Throwable getCause() { 97 return cause; 98 } 99 100 101 /** 102 * Sets the exception that caused this exception. 103 * This is necessary to implement Java 1.4 chained exception 104 * functionality in a Java 1.3-compatible way. 105 * 106 * @param cause the exception wrapped in this runtime exception 107 * 108 * @return this exception 109 */ 110 public Throwable initCause(Throwable cause) { 111 if (causeSet) throw new IllegalStateException("Cause cannot be reset"); 112 if (cause == this) throw new IllegalArgumentException("Exception cannot be its own cause"); 113 causeSet = true; 114 this.cause = cause; 115 return this; 116 } 117 118 /** Print this exception's stack trace, followed by the 119 * source exception's trace, if any. 120 * 121 * @param s the stream on which to print the stack trace 122 */ 123 public void printStackTrace ( PrintStream s ) 124 { 125 super.printStackTrace ( s ); 126 if (JaxenException.javaVersion < 1.4 && getCause() != null) { 127 s.print( "Caused by: " ); 128 getCause().printStackTrace( s ); 129 } 130 } 131 132 /** Print this exception's stack trace, followed by the 133 * source exception's stack trace, if any. 134 * 135 * @param s the writer on which to print the stack trace 136 */ 137 public void printStackTrace ( PrintWriter s ) 138 { 139 super.printStackTrace( s ); 140 if (JaxenException.javaVersion < 1.4 && getCause() != null) { 141 s.print( "Caused by: " ); 142 getCause().printStackTrace( s ); 143 } 144 } 145 146 }