public @ Nonnull DataRoot convert2DataRoot ( DataRootExt dataRootExt ) { DataRoot dataRoot = dataRootExt . getDataRoot ( ) ; if ( dataRoot != null ) return dataRoot ; // otherwise must read the catalog that its in dataRoot = readDataRootFromCatalog ( dataRootExt ) ; dataRootExt . setDataRoot ( dataRoot ) ; return dataRoot ; }
convert a dataRootExt to a dataRoot