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//
/// \file persistency/P01/src/RootIO.cc
/// \brief Implementation of the RootIO class
//
//
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#include <sstream>

#include "RootIO.hh"
//
#include "G4SDManager.hh"
#include "G4HCofThisEvent.hh"
#include "G4EventManager.hh"
#include "G4Event.hh"
//

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static RootIO* instance = 0;

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RootIO::RootIO():fNevents(0)
{
  // initialize ROOT
  TSystem ts;
  gSystem->Load("libExP01ClassesDict");

  //gDebug = 1;

  fFile = new TFile("hits.root","RECREATE");
}

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RootIO::~RootIO()
{}

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RootIO* RootIO::GetInstance()
{
  if (instance == 0 )
  {
    instance = new RootIO();
  }
  return instance;
}

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void RootIO::Write(std::vector<ExP01TrackerHit*>* hcont)
{
  fNevents++;

  std::ostringstream os;
  os << fNevents;
  std::string stevt = "Event_" + os.str(); 
  const char* chevt = stevt.c_str();

  G4cout << "writing " << stevt << G4endl;

  fFile->WriteObject(hcont, chevt);

}

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void RootIO::Close()
{
  fFile->Close();
}

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