eventHandler = ( IDataSourceEventHandler ) getInstance( className );
eventHandler = ( IDataSourceEventHandler ) getInstance( className, context );
	protected void initEventHandler( String className )	{		if ( className != null )		{			try			{				eventHandler = ( IDataSourceEventHandler ) getInstance( className );			} catch ( Exception e )			{				log.log( Level.WARNING, e.getMessage( ), e );			}		}	}