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