1 /*
2 * This file is part of *** M y C o R e ***
3 * See http://www.mycore.de/ for details.
4 *
5 * MyCoRe is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 *
10 * MyCoRe is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with MyCoRe. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19 package org.mycore.common;
20
21 import javax.xml.transform.TransformerException;
22
23 import org.apache.xml.utils.WrappedRuntimeException;
24
25 /**
26 * Tries to find the cause of an exception by diving down
27 * those exceptions that wrap other exceptions, recursively.
28 * The exception at the bottom of the stack is returned.
29 *
30 * @author Frank L\u00FCtzenkirchen
31 */
32 public class MCRExceptionCauseFinder {
33
34 public static Exception getCause(TransformerException ex) {
35 Throwable cause = ex.getException();
36 return (cause == null ? ex : getCause(cause));
37 }
38
39 public static Exception getCause(Throwable ex) {
40 Throwable cause = ex.getCause();
41 return (cause == null ? (Exception) ex : getCause(cause));
42 }
43
44 public static Exception getCause(WrappedRuntimeException ex) {
45 return getCause(ex.getException());
46 }
47 }