001/* InvocationTargetException.java -- Wrapper exception for reflection
002   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2005  Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038
039package java.lang.reflect;
040
041/**
042 * InvocationTargetException is sort of a way to "wrap" whatever exception
043 * comes up when a method or constructor is called via Reflection. As of
044 * JDK 1.4, it was retrofitted to match the exception chaining of all other
045 * exceptions, but <code>getTargetException()</code> still works.
046 *
047 * @author John Keiser
048 * @author Tom Tromey (tromey@cygnus.com)
049 * @author Eric Blake (ebb9@email.byu.edu)
050 * @see Method#invoke(Object,Object[])
051 * @see Constructor#newInstance(Object[])
052 * @since 1.1
053 * @status updated to 1.4
054 */
055public class InvocationTargetException extends Exception
056{
057  /**
058   * Compatible with JDK 1.1+.
059   */
060  private static final long serialVersionUID = 4085088731926701167L;
061
062  /**
063   * The chained exception. This field is only around for serial compatibility.
064   *
065   * @serial the chained exception
066   */
067  private final Throwable target;
068
069  /**
070   * Construct an exception with null as the cause. The cause is initialized
071   * to null.
072   */
073  protected InvocationTargetException()
074  {
075    this(null, null);
076  }
077
078  /**
079   * Create an <code>InvocationTargetException</code> using another
080   * exception.
081   *
082   * @param targetException the exception to wrap
083   */
084  public InvocationTargetException(Throwable targetException)
085  {
086    this(targetException, null);
087  }
088
089  /**
090   * Create an <code>InvocationTargetException</code> using another
091   * exception and an error message.
092   *
093   * @param targetException the exception to wrap
094   * @param err an extra reason for the exception-throwing
095   */
096  public InvocationTargetException(Throwable targetException, String err)
097  {
098    super(err, targetException);
099    target = targetException;
100  }
101
102  /**
103   * Get the wrapped (targeted) exception.
104   *
105   * @return the targeted exception
106   * @see #getCause()
107   */
108  public Throwable getTargetException()
109  {
110    return target;
111  }
112
113  /**
114   * Returns the cause of this exception (which may be null).
115   *
116   * @return the cause
117   * @since 1.4
118   */
119  public Throwable getCause()
120  {
121    return target;
122  }
123}