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File indexing completed on 2025-09-17 09:14:16
0001 // Author: Enrico Guiraud CERN 09/2020 0002 0003 /************************************************************************* 0004 * Copyright (C) 1995-2020, Rene Brun and Fons Rademakers. * 0005 * All rights reserved. * 0006 * * 0007 * For the licensing terms see $ROOTSYS/LICENSE. * 0008 * For the list of contributors see $ROOTSYS/README/CREDITS. * 0009 *************************************************************************/ 0010 0011 #ifndef ROOT_INTERNAL_RDF_RCOLUMNREADERBASE 0012 #define ROOT_INTERNAL_RDF_RCOLUMNREADERBASE 0013 0014 #include <Rtypes.h> 0015 0016 namespace ROOT { 0017 namespace Detail { 0018 namespace RDF { 0019 0020 /** 0021 \class ROOT::Internal::RDF::RColumnReaderBase 0022 \ingroup dataframe 0023 \brief Pure virtual base class for all column reader types 0024 0025 This pure virtual class provides a common base class for the different column reader types, e.g. RTreeColumnReader and 0026 RDSColumnReader. 0027 **/ 0028 class R__CLING_PTRCHECK(off) RColumnReaderBase { 0029 public: 0030 virtual ~RColumnReaderBase() = default; 0031 0032 /// Return the column value for the given entry. 0033 /// \tparam T The column type 0034 /// \param entry The entry number 0035 /// 0036 /// The caller is responsible for checking that the returned value actually 0037 /// exists. 0038 template <typename T> 0039 T *TryGet(Long64_t entry) 0040 { 0041 return static_cast<T *>(GetImpl(entry)); 0042 } 0043 0044 private: 0045 virtual void *GetImpl(Long64_t entry) = 0; 0046 }; 0047 0048 } // namespace RDF 0049 } // namespace Detail 0050 } // namespace ROOT 0051 0052 #endif
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