//
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//
// $Id$
//
// ----------------------------------------------------------------------
// Class G4TrackLogger
//
// Class description:
// 
// This class loggs every track via it's id. It may tell if
// a track has been logged. The loggs are cleared when ever 
// the object has been informed about a new event.
// 
// Author: Michael Dressel (Michael.Dressel@cern.ch)
// ----------------------------------------------------------------------
//

#ifndef G4TrackLogger_hh
#define G4TrackLogger_hh G4TrackLogger_hh

#include "globals.hh"
#include <set>

class G4TrackLogger {
public:
  G4TrackLogger();
  ~G4TrackLogger();

  void SetEventID(G4int id);
    // inform the object about the event number
    // if the event number changes the loggs are cleared.

  G4bool FirstEnterance(G4int trid);
    // returns true if the track is new to this event.

  typedef std::set<G4int > TrackIDsSet;
    // log for the track ids.

private:
  G4int fPreviousEventID;
  TrackIDsSet fTrackIDsSet;

};

#endif