[Xpg-xml-commits] CVS: edu/iicm/xpg/statemachine TransitionException.java,NONE,1.1

[Stefan T. <th...@us...>]

Update of /cvsroot/xpg-xml/edu/iicm/xpg/statemachine
In directory usw-pr-cvs1:/tmp/cvs-serv32015

Added Files:
	TransitionException.java 
Log Message:
new Exception


--- NEW FILE: TransitionException.java ---
/***********************************************************************
 * @(#)$RCSfile: TransitionException.java,v $
 *
 * Copyright (c) 2001 IICM, Graz University of Technology
 * Schiesstattgasse 4a, A-8010 Graz, Austria.
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License (LGPL)
 * as published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public 
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 
 * 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 ***********************************************************************/

package edu.iicm.xpg.statemachine;

//----------------------------------------------------------------------
/**
 * @author Stefan Thalauer
 * @version $Revision: 1.1 $ 
 */


public class TransitionException extends Exception 
{
  protected Exception exception_;

//----------------------------------------------------------------------
/**
 */

  public TransitionException ()
  {
    super();
   exception_ = null;
  }


//----------------------------------------------------------------------
/**
 */

  public TransitionException (String message) 
  {
    super(message);
    exception_ = null;
  }

//----------------------------------------------------------------------
/** Create a new TransitionException wrapping an existing exception.
 *
 * The existing exception will be embedded in the new
 * one, and its message will become the default message for
 * the TransitionException.
 *
 * @param exc The exception to be wrapped in a TransitionException.
 */

  public TransitionException (Exception exc)
  {
    super();
    exception_ = exc;
  }

//----------------------------------------------------------------------
/** Create a new TransitionException from an existing exception.
 *
 * The existing exception will be embedded in the new
 * one, but the new exception will have its own message.
 *
 * @param message The detail message.
 * @param exc The exception to be wrapped in a TransitionException.
 */

  public TransitionException (String message, Exception exc)
  {
    super(message);
    exception_ = exc;
  }

//----------------------------------------------------------------------
/** Return a detail message for this exception.
 *
 * If there is an embedded exception, and if the TransitionException
 * has no detail message of its own, this method will return
 * the detail message from the embedded exception.</p>
 *
 * @return The error or warning message.
 */
 public String getMessage ()
  {
    String message = super.getMessage();
	
    if (message == null && exception_ != null) 
    {
	    return exception_.getMessage();
    } 
    else 
    {
	    return message;
    }
  }
    
//----------------------------------------------------------------------
/** Return the embedded exception, if any.
 *
 * @return The embedded exception, or null if there is none.
 */

  public Exception getException ()
  {
    return exception_;
  }

//----------------------------------------------------------------------
/** Override toString to pick up any embedded exception.
 *
 * @return A string representation of this exception.
 */

  public String toString ()
  {
    if (exception_ != null) 
    {
	    return exception_.toString();
    } 
    else 
    {
	    return super.toString();
    }
  }
}