RConverter.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 <GaudiKernel/Converter.h>
#include <TDirectory.h>
#include <map>
#include <string>
 
// Forward declarations
class ISvcLocator;
class TObject;
class TTree;
class TFile;
 
class GlobalDirectoryRestore {
  TDirectory* m_current;
 
public:
  GlobalDirectoryRestore() { m_current = gDirectory; }
  virtual ~GlobalDirectoryRestore() { gDirectory = m_current; }
};
 
namespace RootHistCnv {

  class RConverter : public Converter {
  public:
    StatusCode createRep( DataObject* pObj, IOpaqueAddress*& refpAddr ) override;
    static long storageType() { return ROOT_StorageType; }
    long        repSvcType() const override { return i_repSvcType(); }
 
    StatusCode error( const std::string& msg );
    StatusCode regTFile( const std::string&, const TFile* );
    StatusCode findTFile( const std::string&, TFile*& );
 
    std::string diskDirectory( const std::string& loc );
    std::string directory( const std::string& loc );
    void        setDirectory( const std::string& loc );
    void        setDiskDirectory( const std::string& loc );
    StatusCode  createDirectory( const std::string& loc );
    StatusCode  createDiskDirectory( const std::string& loc );
    std::string getDirectory();
 
    std::string convertId( const std::string& ) const;
 
  protected:
    RConverter( const CLID& clid, ISvcLocator* svc ) : Converter( storageType(), clid, svc ) {}
    virtual StatusCode readObject( IOpaqueAddress* pAddr, DataObject*& refpObj );
    virtual TObject* createPersistent( DataObject* pObj );
    StatusCode createAddress( DataObject* pObject, TDirectory* pDir, TObject* pTObject, IOpaqueAddress*& refpAddr );
 
    StatusCode createAddress( const std::string& rzdir, const CLID& clid, long id, TObject* pTobj,
                              IOpaqueAddress*& refpAddress );
 
    StatusCode createAddress( const std::string& rzdir, const CLID& clid, const std::string& title, TObject* pTobj,
                              IOpaqueAddress*& refpAddress );

    TDirectory* changeDirectory( DataObject* pObject );
  };
} // namespace RootHistCnv