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// $Id: G4QHadronBuilder.hh,v 1.3 2009/02/23 09:49:24 mkossov Exp $
// GEANT4 tag $Name: geant4-09-03-beta-cand-01 $
//
// -----------------------------------------------------------------------------
//      GEANT 4 class header file
//
//                 History: 
//     Created by Mikhail Kossov, October 2006
//     Simple service class building hadron out of two partons; 
//     For comparison mirror member functions are taken from G4 class:
//     G4HadronBuilder
// -----------------------------------------------------------------------------
// Short description: A CHIPS class for the builder of the G4QHadron, which is a
// resulting object for the string fragmentation. the G4QHadron has specific
// parameters, which are not included in the G4QParticle from the CHIPS World,
// but necessary for the string fragmentation. When the G4QHadron is created
// (builded), it is converted to the CHIPS particle.
// -----------------------------------------------------------------------------
//

#ifndef G4QHadronBuilder_h
#define G4QHadronBuilder_h 1

#include "globals.hh"
#include <vector>
#include "G4QHadron.hh"
#include "G4QParton.hh"

class G4QHadronBuilder
{
public:
  G4QHadronBuilder(); 
  G4QHadron* Build(G4QParton* black, G4QParton* white);
  G4QHadron* BuildLowSpin(G4QParton* black, G4QParton* white);
  G4QHadron* BuildHighSpin(G4QParton* black, G4QParton* white);
private:
  enum Spin {SpinZero=1, SpinHalf=2, SpinOne=3, SpinThreeHalf=4};
  G4QHadron* Meson(G4QParton* black, G4QParton* white, Spin spin);
  G4QHadron* Baryon(G4QParton* black,G4QParton* white, Spin spin);
  // Body
  G4double mesonSpinMix;
  G4double baryonSpinMix;
  std::vector<G4double> scalarMesonMixings;
  std::vector<G4double> vectorMesonMixings;
};

// G4QHcreate type is an interface to Build/BuildLowSpin/BuildHighSpin member functions
typedef G4QHadron* (G4QHadronBuilder::*G4QHcreate) (G4QParton*,G4QParton*);
#endif