2 * Copyright (C) 2001, 2002 The Mir-coders group
4 * This file is part of Mir.
6 * Mir is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Mir is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Mir; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * In addition, as a special exception, The Mir-coders gives permission to link
21 * the code of this program with any library licensed under the Apache Software License,
22 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
23 * (or with modified versions of the above that use the same license as the above),
24 * and distribute linked combinations including the two. You must obey the
25 * GNU General Public License in all respects for all of the code used other than
26 * the above mentioned libraries. If you modify this file, you may extend this
27 * exception to your version of the file, but you are not obligated to do so.
28 * If you do not wish to do so, delete this exception statement from your version.
32 import java.lang.reflect.InvocationTargetException;
33 import java.io.PrintStream;
34 import java.io.PrintWriter;
35 import java.io.StringWriter;
37 import multex.Failure;
39 import org.xml.sax.SAXException;
43 * <p>Title: ExceptionFunctions </p>
44 * <p>Description: Functions to assist handling and throwing exceptions</p>
45 * <p>Copyright: Copyright (c) 2003</p>
46 * <p>Company: Mir coders</p>
51 public class ExceptionFunctions {
52 private ExceptionFunctions() {
56 * Traces an exception to it's root cause, using all known exception types that support
59 * @return the cause (if found)
62 public static Throwable traceCauseException(Throwable anException) {
63 Throwable result = anException;
66 if ((result instanceof Failure) && (((Failure) result).getCause()!=null)) {
67 result = ((Failure) result).getCause();
69 else if ((result instanceof SAXException) && (((SAXException) result).getException()!=null)) {
70 result = ((SAXException) result).getException();
72 else if ((result instanceof InvocationTargetException) && (((InvocationTargetException) result).getTargetException()!=null)) {
73 result = ((InvocationTargetException) result).getTargetException();
83 * Prints an exception's stacktrace to a <code>String</code>
85 public static String getStackTrace(Throwable aThrowable) {
86 StringWriter writer = new StringWriter();
87 aThrowable.printStackTrace(new PrintWriter(writer));
88 return writer.toString();