#ifndef ALIGENHYDJETEVENTHEADER_H
#define ALIGENHYDJETEVENTHEADER_H

/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               */

/* $Id$ */

// Event Header for Hydjet generator
// Output generator parameters are accessable
// for the user through this interface.
// Author: Rafael Diaz Valdes
// (rafael.diaz.valdes@cern.ch)

#include "AliGenEventHeader.h"
#include "AliCollisionGeometry.h"

class AliGenHydjetEventHeader : public AliGenEventHeader, public AliCollisionGeometry
{
 public:

  AliGenHydjetEventHeader(const char* name);
  AliGenHydjetEventHeader();
  virtual ~AliGenHydjetEventHeader() {}

  // Setters
  virtual void   SetNJets(Int_t njet) {fNjet=njet;}
  virtual void   SetImpactParameter(Float_t bgen) {fImpactParam=bgen;}
  virtual void   SetNbcol(Float_t nbcol){fNbcol=nbcol;}
  virtual void   SetNpart(Float_t npart){fNpart=npart;}
  virtual void   SetNpyt(Float_t npyt){fNpyt=npyt;}
  virtual void   SetNhyd(Float_t nhyd){fNhyd=nhyd;}

protected:

  Float_t fNjet;         //number of hard parton-parton scatterings with pt>ptmin in event.
  Float_t fImpactParam;  //generated value of impact parameter in units of nucleus radius RA
                         //(i.e the value in [fm] will be bgen*RA).
  Float_t fNbcol;        //mean number of nucleon-nucleon binary sub-collisions at given 'bgen'.
  Float_t fNpart;        //mean number of nucleon participants at given 'bgen'.
  Float_t fNpyt;         //multiplicity of hard PYTHIA/PYQUEN-induced particles in event
                         //(including full parton story).
  Float_t fNhyd;         //multiplicity of soft HYDRO-induced hadrons in event.

  ClassDef(AliGenHydjetEventHeader,1) // Event header for Hydjet event
};

#endif