Source for java.rmi.activation.ActivationException

   1: /* ActivationException.java -- general Activation exception
   2:    Copyright (c) 1996, 1997, 1998, 1999, 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., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 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: package java.rmi.activation;
  39: 
  40: /**
  41:  * General exception class for <code>java.rmi.activation</code>.
  42:  *
  43:  * @author unknown
  44:  * @since 1.2
  45:  * @status updated to 1.4
  46:  */
  47: public class ActivationException extends Exception
  48: {
  49:   /**
  50:    * Compatible with JDK 1.2+.
  51:    */
  52:   private static final long serialVersionUID = -4320118837291406071L;
  53: 
  54:   /**
  55:    * The cause of this exception. This pre-dates the exception chaining
  56:    * of Throwable; and although you can change this field, you are wiser
  57:    * to leave it alone.
  58:    *
  59:    * @serial the exception cause
  60:    */
  61:   public Throwable detail;
  62: 
  63:   /**
  64:    * Create an exception with no message, and cause initialized to null.
  65:    */
  66:   public ActivationException()
  67:   {
  68:     this(null, null);
  69:   }
  70: 
  71:   /**
  72:    * Create an exception with the given message, and cause initialized to null.
  73:    *
  74:    * @param s the message
  75:    */
  76:   public ActivationException(String s)
  77:   {
  78:     this(s, null);
  79:   }
  80: 
  81:   /**
  82:    * Create an exception with the given message and cause.
  83:    *
  84:    * @param s the message
  85:    * @param ex the cause
  86:    */
  87:   public ActivationException(String s, Throwable ex)
  88:   {
  89:     super(s, ex);
  90:     detail = ex;
  91:   }
  92: 
  93:   /**
  94:    * This method returns a message indicating what went wrong, in this
  95:    * format:
  96:    * <code>super.getMessage() + (detail == null ? ""
  97:    *    : "; nested exception is:\n\t" + detail)</code>.
  98:    *
  99:    * @return the chained message
 100:    */
 101:   public String getMessage()
 102:   {
 103:     if (detail == this || detail == null)
 104:       return super.getMessage();
 105:     return super.getMessage() + "; nested exception is:\n\t" + detail;
 106:   }
 107: 
 108:   /**
 109:    * Returns the cause of this exception. Note that this may not be the
 110:    * original cause, thanks to the <code>detail</code> field being public
 111:    * and non-final (yuck). However, to avoid violating the contract of
 112:    * Throwable.getCause(), this returns null if <code>detail == this</code>,
 113:    * as no exception can be its own cause.
 114:    *
 115:    * @return the cause
 116:    * @since 1.4
 117:    */
 118:   public Throwable getCause()
 119:   {
 120:     return detail == this ? null : detail;
 121:   }
 122: }