initialize( dataEngine, dataSetDesign, appContext );
this.dataEngine = dataEngine; this.dataSetDesign = dataSetDesign; this.appContext = appContext;
	PreparedJointDataSourceQuery( DataEngineImpl dataEngine,			IQueryDefinition queryDefn, IBaseDataSetDesign dataSetDesign,			Map appContext ) throws DataException	{		super( dataEngine, queryDefn, dataSetDesign, appContext );		initialize( dataEngine, dataSetDesign, appContext );	}