case 4 : String value = handle.getAggregrateOn( ); if ( value == null ) text = NONE; else text = value; break;
		public String getColumnText( Object element, int columnIndex )		{			if ( element == dummyChoice )			{				if ( columnIndex == 1 )				{					return INPUT_PROPMT;				}				return ""; //$NON-NLS-1$			}			ComputedColumnHandle handle = ( (ComputedColumnHandle) element );			String text = null;			switch ( columnIndex )			{				case 1 :					text = handle.getName( );					break;				case 2 :					text = ChoiceSetFactory.getDisplayNameFromChoiceSet( handle.getDataType( ),							dataTypeChoiceSet );					break;				case 3 :					text = handle.getExpression( );					break;			}			if ( text == null )			{				text = ""; //$NON-NLS-1$			}			return text;		}