Ntup.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
// Ntup.h 
// Header file for class AthEx::Ntup
// Author: S.Binet<binet@cern.ch>
#ifndef ATHEXHISTNTUP_ATHEXNTUP_H
#define ATHEXHISTNTUP_ATHEXNTUP_H 1
 
// STL includes
#include <string>
#include <vector>
 
// FrameWork includes
#include "AthenaBaseComps/AthAlgorithm.h"
#include "GaudiKernel/ITHistSvc.h"
#include "GaudiKernel/ServiceHandle.h"
#include "StoreGate/ReadHandleKey.h"
#include "xAODEventInfo/EventInfo.h"
 
// fwd declares
class TTree;
 
namespace AthEx {
 
class Ntup
  : public ::AthAlgorithm
{ 

  // Public methods: 
 public: 
 
  // Copy constructor: 

  Ntup( const std::string& name, ISvcLocator* pSvcLocator );

  virtual ~Ntup(); 
 
  // Assignment operator: 
  //Ntup &operator=(const Ntup &alg); 
 
  // Athena algorithm's Hooks
  virtual StatusCode  initialize();
  virtual StatusCode  execute(const EventContext& ctx);
  virtual StatusCode  finalize();

  // Private data: 
 private: 

  Ntup();

  ServiceHandle<ITHistSvc> m_ntSvc {this, "THistSvc", "THistSvc", "Handle to the histogram service"};
 
  // n-tuple data members
  unsigned int m_size;
  unsigned int m_run;
  unsigned int m_event;
  std::vector<long> m_rundata;

  TTree* m_ntuple;
  
  SG::ReadHandleKey<xAOD::EventInfo> m_evt {this, "EventInfo", "EventInfo", 
                                            "key to the event-info instance to ntuple-ize."};
}; 
 
} //> namespace AthEx
 
#endif //> !ATHEXHISTNTUP_ATHEXNTUP_H