HashSet set = new HashSet( ); set.add( propertyName ); refreshValues( set );
refreshValues( );
	public void elementChanged( DesignElementHandle focus, NotificationEvent ev )	{		if ( ev.getEventType( ) == NotificationEvent.PROPERTY_EVENT )		{			PropertyEvent event = (PropertyEvent) ev;			String propertyName = event.getPropertyName( );			if ( ReportItemHandle.PARAM_BINDINGS_PROP.equals( propertyName )					|| ReportItemHandle.DATA_SET_PROP.equals( propertyName ) )			{				HashSet set = new HashSet( );				set.add( propertyName );				refreshValues( set );			}		}		// report design 's oda data set change event.		if ( ev.getEventType( ) == NotificationEvent.CONTENT_EVENT )		{			if ( ev instanceof ContentEvent )			{				ContentEvent ce = (ContentEvent) ev;				if ( ce.getContent( ) instanceof DataSet )				{					refreshValues( null );				}			}		}	}