001 /* InvocationTargetException.java -- Wrapper exception for reflection
002 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2005 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
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017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038
039 package 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 */
055 public 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 }