javalayerexception.java

基于java开发的mp3播放器

/*
 * 12/12/99		Initial version.	[e-mail]
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 *  the Free Software Foundation; either version 2 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 General Public License for more details.
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 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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 */


package javazoom.jl.decoder;

import java.io.PrintStream;


/**
 * The JavaLayerException is the base class for all API-level
 * exceptions thrown by JavaLayer. To facilitate conversion and 
 * common handling of exceptions from other domains, the class 
 * can delegate some functionality to a contained Throwable instance. 
 * <p> 
 * 
 * @author MDM
 */
public class JavaLayerException extends Exception
{
	
	private Throwable		exception;
	
	
	public JavaLayerException()
	{
	}
	
	public JavaLayerException(String msg)
	{
		super(msg);
	}
	
	public JavaLayerException(String msg, Throwable t)
	{
		super(msg);
		exception = t;
	}
	
	public Throwable getException()
	{
		return exception;	
	}
	
	
	public void printStackTrace()
	{
		printStackTrace(System.err);	
	}
	
	public void printStackTrace(PrintStream ps)
	{
		if (this.exception==null)
		{
			super.printStackTrace(ps);	
		}
		else
		{
			exception.printStackTrace();
		}
	}
	
	
}