Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
SAXPathException |
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1 | /* |
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2 | * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/saxpath/SAXPathException.java,v 1.12 2005/09/24 11:46:45 elharo Exp $ |
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3 | * $Revision: 1.12 $ |
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4 | * $Date: 2005/09/24 11:46:45 $ |
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5 | * |
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6 | * ==================================================================== |
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7 | * |
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8 | * Copyright (C) 2000-2002 bob mcwhirter & James Strachan. |
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9 | * All rights reserved. |
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10 | * |
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11 | * Redistribution and use in source and binary forms, with or without |
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12 | * modification, are permitted provided that the following conditions |
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13 | * are met: |
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14 | * |
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15 | * 1. Redistributions of source code must retain the above copyright |
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16 | * notice, this list of conditions, and the following disclaimer. |
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17 | * |
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18 | * 2. Redistributions in binary form must reproduce the above copyright |
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19 | * notice, this list of conditions, and the disclaimer that follows |
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20 | * these conditions in the documentation and/or other materials |
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21 | * provided with the distribution. |
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22 | * |
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23 | * 3. The name "Jaxen" must not be used to endorse or promote products |
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24 | * derived from this software without prior written permission. For |
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25 | * written permission, please contact license@jaxen.org. |
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26 | * |
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27 | * 4. Products derived from this software may not be called "Jaxen", nor |
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28 | * may "Jaxen" appear in their name, without prior written permission |
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29 | * from the Jaxen Project Management (pm@jaxen.org). |
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30 | * |
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31 | * In addition, we request (but do not require) that you include in the |
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32 | * end-user documentation provided with the redistribution and/or in the |
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33 | * software itself an acknowledgement equivalent to the following: |
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34 | * "This product includes software developed by the |
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35 | * Jaxen Project <http://www.jaxen.org/>." |
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36 | * Alternatively, the acknowledgment may be graphical using the logos |
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37 | * available at http://www.jaxen.org/ |
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38 | * |
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39 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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40 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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41 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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42 | * DISCLAIMED. IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT |
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43 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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45 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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46 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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47 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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48 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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49 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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50 | * SUCH DAMAGE. |
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51 | * |
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52 | * ==================================================================== |
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53 | * This software consists of voluntary contributions made by many |
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54 | * individuals on behalf of the Jaxen Project and was originally |
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55 | * created by bob mcwhirter <bob@werken.com> and |
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56 | * James Strachan <jstrachan@apache.org>. For more information on the |
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57 | * Jaxen Project, please see <http://www.jaxen.org/>. |
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58 | * |
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59 | * $Id: SAXPathException.java,v 1.12 2005/09/24 11:46:45 elharo Exp $ |
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60 | */ |
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61 | ||
62 | package org.jaxen.saxpath; |
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63 | ||
64 | import java.io.PrintStream; |
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65 | import java.io.PrintWriter; |
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66 | ||
67 | /** Base of all SAXPath exceptions. |
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68 | * |
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69 | * @author bob mcwhirter (bob@werken.com) |
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70 | */ |
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71 | public class SAXPathException extends Exception |
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72 | { |
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73 | ||
74 | 270 | private static double javaVersion = 1.4; |
75 | ||
76 | static { |
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77 | try { |
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78 | 270 | String versionString = System.getProperty("java.version"); |
79 | 270 | versionString = versionString.substring(0, 3); |
80 | 270 | javaVersion = Double.valueOf(versionString).doubleValue(); |
81 | } |
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82 | 0 | catch (Exception ex) { |
83 | // The version string format changed so presumably it's |
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84 | // 1.4 or later. |
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85 | 270 | } |
86 | 270 | } |
87 | ||
88 | /** Create a new SAXPathException with a given message. |
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89 | * |
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90 | * @param message the error message |
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91 | */ |
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92 | public SAXPathException(String message) |
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93 | { |
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94 | 738 | super( message ); |
95 | 738 | } |
96 | ||
97 | /** Create a new SAXPathException based on another exception |
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98 | * |
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99 | * @param cause the error source |
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100 | */ |
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101 | public SAXPathException(Throwable cause) |
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102 | { |
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103 | 252 | super ( cause.getMessage() ); |
104 | 252 | initCause(cause); |
105 | 252 | } |
106 | ||
107 | /** |
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108 | * Create a new SAXPathException with the specified detail message |
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109 | * and root cause. |
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110 | * |
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111 | * @param message the detail message |
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112 | * @param cause the cause of this exception |
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113 | */ |
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114 | public SAXPathException(String message, Throwable cause) { |
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115 | 6 | super( message ); |
116 | 6 | initCause(cause); |
117 | 6 | } |
118 | ||
119 | ||
120 | private Throwable cause; |
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121 | 996 | private boolean causeSet = false; |
122 | ||
123 | /** |
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124 | * Returns the exception that caused this exception. |
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125 | * This is necessary to implement Java 1.4 chained exception |
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126 | * functionality in a Java 1.3-compatible way. |
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127 | * |
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128 | * @return the exception that caused this exception |
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129 | */ |
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130 | public Throwable getCause() { |
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131 | 30 | return cause; |
132 | } |
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133 | ||
134 | ||
135 | /** |
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136 | * Sets the exception that caused this exception. |
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137 | * This is necessary to implement Java 1.4 chained exception |
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138 | * functionality in a Java 1.3-compatible way. |
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139 | * |
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140 | * @param cause the exception wrapped in this runtime exception |
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141 | * |
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142 | * @return this exception |
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143 | */ |
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144 | public Throwable initCause(Throwable cause) { |
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145 | 258 | if (causeSet) throw new IllegalStateException("Cause cannot be reset"); |
146 | 258 | if (cause == this) throw new IllegalArgumentException("Exception cannot be its own cause"); |
147 | 258 | causeSet = true; |
148 | 258 | this.cause = cause; |
149 | 258 | return this; |
150 | } |
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151 | ||
152 | /** Print this exception's stack trace, followed by the |
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153 | * source exception's trace, if any. |
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154 | * |
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155 | * @param s the stream on which to print the stack trace |
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156 | */ |
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157 | public void printStackTrace ( PrintStream s ) |
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158 | { |
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159 | 0 | super.printStackTrace ( s ); |
160 | 0 | if (javaVersion < 1.4 && getCause() != null) { |
161 | 0 | s.print( "Caused by: " ); |
162 | 0 | getCause().printStackTrace( s ); |
163 | } |
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164 | 0 | } |
165 | ||
166 | /** Print this exception's stack trace, followed by the |
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167 | * source exception's stack trace, if any. |
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168 | * |
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169 | * @param s the writer on which to print the stack trace |
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170 | */ |
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171 | public void printStackTrace ( PrintWriter s ) |
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172 | { |
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173 | 12 | super.printStackTrace( s ); |
174 | 12 | if (javaVersion < 1.4 && getCause() != null) { |
175 | 0 | s.print( "Caused by: " ); |
176 | 0 | getCause().printStackTrace( s ); |
177 | } |
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178 | 12 | } |
179 | ||
180 | } |