libjava/java/lang/reflect/InvocationTargetException.java

   1 /* InvocationTargetException.java -- Wrapper exception for reflection
   2    Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath 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, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38
  39 package java.lang.reflect;
  40
  41 /**
  42  * InvocationTargetException is sort of a way to "wrap" whatever exception
  43  * comes up when a method or constructor is called via Reflection. As of
  44  * JDK 1.4, it was retrofitted to match the exception chaining of all other
  45  * exceptions, but <code>getTargetException()</code> still works.
  46  *
  47  * @author John Keiser
  48  * @author Tom Tromey <tromey@cygnus.com>
  49  * @author Eric Blake <ebb9@email.byu.edu>
  50  * @see Method#invoke(Object,Object[])
  51  * @see Constructor#newInstance(Object[])
  52  * @since 1.1
  53  * @status updated to 1.4
  54  */
  55 public class InvocationTargetException extends Exception
  56 {
  57   /**
  58    * Compatible with JDK 1.1+.
  59    */
  60   private static final long serialVersionUID = 4085088731926701167L;
  61
  62   /**
  63    * The chained exception. This field is only around for serial compatibility.
  64    *
  65    * @serial the chained exception
  66    */
  67   private final Throwable target;
  68
  69   /**
  70    * Construct an exception with null as the cause. The cause is initialized
  71    * to null.
  72    */
  73   protected InvocationTargetException()
  74   {
  75     this(null, null);
  76   }
  77
  78   /**
  79    * Create an <code>InvocationTargetException</code> using another
  80    * exception.
  81    *
  82    * @param targetException the exception to wrap
  83    */
  84   public InvocationTargetException(Throwable targetException)
  85   {
  86     this(targetException, null);
  87   }
  88
  89   /**
  90    * Create an <code>InvocationTargetException</code> using another
  91    * exception and an error message.
  92    *
  93    * @param targetException the exception to wrap
  94    * @param err an extra reason for the exception-throwing
  95    */
  96   public InvocationTargetException(Throwable targetException, String err)
  97   {
  98     super(err, targetException);
  99     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 }