RNTupleCnv.h

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/***********************************************************************************\
* (c) Copyright 1998-2025 CERN for the benefit of the LHCb and ATLAS collaborations *
*                                                                                   *
* This software is distributed under the terms of the Apache version 2 licence,     *
* copied verbatim in the file "LICENSE".                                            *
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#pragma once
 
// Include files
#include "RConverter.h"
 
// Forward declarations
class ISvcLocator;
class INTupleItem;
class INTupleSvc;
class INTuple;
class TTree;
 
namespace RootHistCnv {

  class RNTupleCnv : public RConverter {
  public:
    StatusCode initialize() override;
    StatusCode finalize() override;

    StatusCode createObj( IOpaqueAddress* pAddr, DataObject*& refpObj ) override;
    StatusCode updateObj( IOpaqueAddress* pAddr, DataObject* refpObj ) override;
    StatusCode createRep( DataObject* pObj, IOpaqueAddress*& refpAddr ) override;
    StatusCode updateRep( IOpaqueAddress* pAddr, DataObject* pObj ) override;
 
  protected:
    RNTupleCnv( ISvcLocator* svc, const CLID& clid );

    virtual StatusCode load( TTree* tree, INTuple*& refpObj ) = 0;
    virtual StatusCode book( const std::string& desc, INTuple* pObj, TTree*& tree ) = 0;
    virtual StatusCode writeData( TTree* rtree, INTuple* pObj ) = 0;
    virtual StatusCode readData( TTree* rtree, INTuple* pObj, long ievt ) = 0;
 
  protected:
    SmartIF<INTupleSvc> m_ntupleSvc;
 
    virtual std::string rootVarType( int );
  };

  template <class TYP>
  INTupleItem* createNTupleItem( const std::string& itemName, const std::string& blockName,
                                 const std::string& indexName, int indexRange, int arraySize, TYP minimum, TYP maximum,
                                 INTuple* tuple, bool hasRange );
 
  bool parseName( const std::string& full, std::string& blk, std::string& var );
 
} // namespace RootHistCnv