ExceptionHelper


1   /**
2    * Copyright (C) 2001-2004 France Telecom R&D
3    *
4    * This library is free software; you can redistribute it and/or
5    * modify it under the terms of the GNU Lesser General Public
6    * License as published by the Free Software Foundation; either
7    * version 2 of the License, or (at your option) any later version.
8    *
9    * This library is distributed in the hope that it will be useful,
10   * but WITHOUT ANY WARRANTY; without even the implied warranty of
11   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   * Lesser General Public License for more details.
13   *
14   * You should have received a copy of the GNU Lesser General Public
15   * License along with this library; if not, write to the Free Software
16   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
17   */
18  package org.objectweb.speedo.api;
19  
20  import org.objectweb.jorm.api.PException;
21  import org.objectweb.perseus.persistence.api.PersistenceException;
22  import org.objectweb.perseus.pool.api.PoolException;
23  import org.objectweb.medor.api.MedorException;
24  import org.objectweb.medor.expression.api.ExpressionException;
25  
26  import javax.jdo.JDOException;
27  
28  /**
29   * This helper permits to find the final nested exception of a given exception.
30   *
31   * @author S.Chassande-Barrioz
32   */
33  public class ExceptionHelper {
34  
35      public static final Exception   getNested(Exception   e) {
36          if (e == null)
37              return null;
38          Exception   c = e;
39          Exception   i = null;
40          boolean notLast = true;
41          while (notLast) {
42              if (c instanceof SpeedoException) {
43                  i = ((SpeedoException) c).getNestedException();
44              } else if (c instanceof PException) {
45                  i = ((PException) c).getNestedException();
46              } else if (c instanceof MedorException) {
47                  i = ((MedorException) c).getNestedException();
48              } else if (c instanceof ExpressionException) {
49                  i = ((ExpressionException) c).getNestedException();
50              } else if (c instanceof PersistenceException) {
51                  i = ((PersistenceException) c).getNestedException();
52              } else if (c instanceof PoolException) {
53                  i = ((PoolException) c).getNestedException();
54              } else if (c instanceof JDOException) {
55                  Throwable  [] ts = ((JDOException) c).getNestedExceptions();
56                  if (ts != null && ts.length >0 && (ts[0] instanceof Exception  )) {
57                      i = (Exception  ) ts[0];
58                  } else {
59                      notLast = false;
60                  }
61              } else {
62                  notLast = false;
63              }
64              if (notLast && i != null) {
65                  c = i;
66              } else {
67                  notLast = false;
68              }
69          }
70          return c;
71      }
72  
73  }
74
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