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RDefineReader.hxx
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1// Author: Enrico Guiraud CERN 09/2020
2
3/*************************************************************************
4 * Copyright (C) 1995-2020, Rene Brun and Fons Rademakers. *
5 * All rights reserved. *
6 * *
7 * For the licensing terms see $ROOTSYS/LICENSE. *
8 * For the list of contributors see $ROOTSYS/README/CREDITS. *
9 *************************************************************************/
10
11#ifndef ROOT_RDF_RDEFINEREADER
12#define ROOT_RDF_RDEFINEREADER
13
14#include "RColumnReaderBase.hxx"
15#include "RDefineBase.hxx"
16#include "Utils.hxx" // CheckDefineType
17#include <Rtypes.h> // Long64_t, R__CLING_PTRCHECK
18
19#include <limits>
20#include <type_traits>
21
22namespace ROOT {
23namespace Internal {
24namespace RDF {
25
27
28/// Column reader for defined (aka custom) columns.
29class R__CLING_PTRCHECK(off) RDefineReader final : public ROOT::Detail::RDF::RColumnReaderBase {
30 /// Non-owning reference to the node responsible for the custom column. Needed when querying custom values.
32
33 /// Non-owning ptr to the value of a custom column.
34 void *fCustomValuePtr = nullptr;
35
36 /// The slot this value belongs to.
37 unsigned int fSlot = std::numeric_limits<unsigned int>::max();
38
39 void *GetImpl(Long64_t entry) final
40 {
41 fDefine.Update(fSlot, entry);
42 return fCustomValuePtr;
43 }
44
45public:
46 RDefineReader(unsigned int slot, RDFDetail::RDefineBase &define, const std::type_info &tid)
47 : fDefine(define), fCustomValuePtr(define.GetValuePtr(slot)), fSlot(slot)
48 {
49 CheckDefineType(define, tid);
50 }
51};
52
53}
54}
55}
56
57#endif
long long Long64_t
Definition: RtypesCore.h:80
virtual void Update(unsigned int slot, Long64_t entry)=0
Update the value at the address returned by GetValuePtr with the content corresponding to the given e...
Column reader for defined (aka custom) columns.
void * GetImpl(Long64_t entry) final
RDefineReader(unsigned int slot, RDFDetail::RDefineBase &define, const std::type_info &tid)
RDFDetail::RDefineBase & fDefine
Non-owning reference to the node responsible for the custom column. Needed when querying custom value...
void CheckDefineType(RDefineBase &define, const std::type_info &tid)
Definition: RDFUtils.cxx:389
This file contains a specialised ROOT message handler to test for diagnostic in unit tests.