1 /* 2 * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package javax.xml.xpath; 27 28 import java.io.PrintWriter; 29 30 /** 31 * <code>XPathException</code> represents a generic XPath exception.</p> 32 * 33 * @author <a href="Norman.Walsh@Sun.com">Norman Walsh</a> 34 * @author <a href="mailto:Jeff.Suttor@Sun.COM">Jeff Suttor</a> 35 * @since 1.5 36 */ 37 public class XPathException extends Exception { 38 39 private final Throwable cause; 40 41 /** 42 * <p>Stream Unique Identifier.</p> 43 */ 44 private static final long serialVersionUID = -1837080260374986980L; 45 46 /** 47 * <p>Constructs a new <code>XPathException</code> 48 * with the specified detail <code>message</code>.</p> 49 * 50 * <p>The <code>cause</code> is not initialized.</p> 51 * 52 * <p>If <code>message</code> is <code>null</code>, 53 * then a <code>NullPointerException</code> is thrown.</p> 54 * 55 * @param message The detail message. 56 * 57 * @throws NullPointerException When <code>message</code> is 58 * <code>null</code>. 59 */ 60 public XPathException(String message) { 61 super(message); 62 if ( message == null ) { 63 throw new NullPointerException ( "message can't be null"); 64 } 65 this.cause = null; 66 } 67 68 /** 69 * <p>Constructs a new <code>XPathException</code> 70 * with the specified <code>cause</code>.</p> 71 * 72 * <p>If <code>cause</code> is <code>null</code>, 73 * then a <code>NullPointerException</code> is thrown.</p> 74 * 75 * @param cause The cause. 76 * 77 * @throws NullPointerException if <code>cause</code> is <code>null</code>. 78 */ 79 public XPathException(Throwable cause) { 80 super(); 81 this.cause = cause; 82 if ( cause == null ) { 83 throw new NullPointerException ( "cause can't be null"); 84 } 85 } 86 87 /** 88 * <p>Get the cause of this XPathException.</p> 89 * 90 * @return Cause of this XPathException. 91 */ 92 public Throwable getCause() { 93 return cause; 94 } 95 96 /** 97 * <p>Print stack trace to specified <code>PrintStream</code>.</p> 98 * 99 * @param s Print stack trace to this <code>PrintStream</code>. 100 */ 101 public void printStackTrace(java.io.PrintStream s) { 102 if (getCause() != null) { 103 getCause().printStackTrace(s); 104 s.println("--------------- linked to ------------------"); 105 } 106 107 super.printStackTrace(s); 108 } 109 110 /** 111 * <p>Print stack trace to <code>System.err</code>.</p> 112 */ 113 public void printStackTrace() { 114 printStackTrace(System.err); 115 } 116 117 /** 118 * <p>Print stack trace to specified <code>PrintWriter</code>.</p> 119 * 120 * @param s Print stack trace to this <code>PrintWriter</code>. 121 */ 122 public void printStackTrace(PrintWriter s) { 123 124 if (getCause() != null) { 125 getCause().printStackTrace(s); 126 s.println("--------------- linked to ------------------"); 127 } 128 129 super.printStackTrace(s); 130 } 131 }