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1
61
62 package org.jaxen.saxpath;
63
64 import java.io.PrintStream  ;
65 import java.io.PrintWriter ;
66
67
71 public class SAXPathException extends Exception
72 {
73
74 static double javaVersion = 1.4;
75
76 static {
77 try {
78 String versionString = System.getProperty("java.version");
79 versionString = versionString.substring(0, 3);
80 javaVersion = Double.valueOf(versionString).doubleValue();
81 }
82 catch (Exception ex) {
83 }
86 }
87
88
92 public SAXPathException(String message)
93 {
94 super( message );
95 }
96
97
101 public SAXPathException(Throwable cause)
102 {
103 super ( cause.getMessage() );
104 initCause(cause);
105 }
106
107
114 public SAXPathException(String message, Throwable cause) {
115 super( message );
116 initCause(cause);
117 }
118
119
120 private Throwable cause;
121 private boolean causeSet = false;
122
123
130 public Throwable getCause() {
131 return cause;
132 }
133
134
135
144 public Throwable initCause(Throwable cause) {
145 if (causeSet) throw new IllegalStateException ("Cause cannot be reset");
146 if (cause == this) throw new IllegalArgumentException ("Exception cannot be its own cause");
147 causeSet = true;
148 this.cause = cause;
149 return this;
150 }
151
152
157 public void printStackTrace ( PrintStream s )
158 {
159 super.printStackTrace ( s );
160 if (javaVersion < 1.4 && getCause() != null) {
161 s.print( "Caused by: " );
162 getCause().printStackTrace( s );
163 }
164 }
165
166
171 public void printStackTrace ( PrintWriter s )
172 {
173 super.printStackTrace( s );
174 if (javaVersion < 1.4 && getCause() != null) {
175 s.print( "Caused by: " );
176 getCause().printStackTrace( s );
177 }
178 }
179
180 }
181
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Java API By Example, From Geeks To Geeks.