RootConnection.h

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/*
  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
*/
 
// RootConnection.h
// Header file for class Athena::RootConnection
// Author: Peter van Gemmeren <gemmeren@anl.gov>
#ifndef ATHENAROOTCOMPS_ROOTCONNECTION_H
#define ATHENAROOTCOMPS_ROOTCONNECTION_H 1

 
// STL includes
#include <string>
 
// fwk includes
#include "GaudiKernel/StatusCode.h"
 
// fwd declares
class IInterface;
class TFile;
class TTree;
class TBranch;
 
namespace Athena {
class RootConnection
{
public:
  RootConnection(const IInterface* own, const std::string& pfn);
  virtual ~RootConnection();

  // Public methods:

  StatusCode connectRead();
  StatusCode connectWrite(const std::string& mode);
  StatusCode commit();
  StatusCode disconnect();
  bool isConnected() const;
  StatusCode read(void* const data, size_t len);
  StatusCode write(const void* data, unsigned long& len);
  StatusCode setContainer(const std::string& container, const std::string& type);

  // Private data:
private:
  std::string m_fid;
  std::string m_pfn;
  //int m_age;
  //const IInterface* m_owner;

  TFile* m_file;
  TTree* m_tree;
  TBranch* m_branch;
  char m_branchTypeCode;
 
  //FIXME: use a RootConnectionSetup class to
  //       gather this kind of configuration
  // -> autoflush, split, buffersize,...
};
 
} //> namespace Athena
 
#endif /* !ATHENAROOTCOMPS_ROOTCONNECTION_H */