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// $Id$
//
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:     G4BGGPionElasticXS
//
// Author:        Vladimir Ivanchenko
//
// Creation date: 01.10.2003
// Modifications:
//
//
// Class Description:
//
// Wrapper of pi+ and pi- inelastic cross-sections using Barashenkov 
// parametersation below 100 GeV and Glauber-Gribov model above
//
// -------------------------------------------------------------------
//

#ifndef G4BGGPionElasticXS_h
#define G4BGGPionElasticXS_h

#include "globals.hh"
#include "G4VCrossSectionDataSet.hh"
#include "G4ParticleDefinition.hh"

class G4GlauberGribovCrossSection;
class G4UPiNuclearCrossSection;
class G4HadronNucleonXsc;
class G4ComponentSAIDTotalXS;
class G4Material;
class G4Element;
class G4Isotope;

class G4BGGPionElasticXS : public G4VCrossSectionDataSet
{
public:

  G4BGGPionElasticXS (const G4ParticleDefinition*);

  virtual ~G4BGGPionElasticXS();
   
  virtual
  G4bool IsElementApplicable(const G4DynamicParticle*, G4int Z,
			     const G4Material*);

  virtual
  G4bool IsIsoApplicable(const G4DynamicParticle*, G4int Z, G4int A,
			 const G4Element* elm = 0,
			 const G4Material* mat = 0);

  virtual
  G4double GetElementCrossSection(const G4DynamicParticle*, G4int Z,
				  const G4Material* mat = 0);

  virtual
  G4double GetIsoCrossSection(const G4DynamicParticle*, G4int Z, G4int A,  
			      const G4Isotope* iso = 0,
			      const G4Element* elm = 0,
			      const G4Material* mat = 0);

  virtual
  void BuildPhysicsTable(const G4ParticleDefinition&);

  virtual void CrossSectionDescription(std::ostream&) const;

private:

  G4BGGPionElasticXS & operator=(const G4BGGPionElasticXS &right);
  G4BGGPionElasticXS(const G4BGGPionElasticXS&);

  G4double fGlauberEnergy;  
  G4double fLowEnergy;  
  G4double fSAIDHighEnergyLimit;
  G4double theGlauberFac[93];
  G4double theCoulombFac[93];
  G4int    theA[93];

  const G4ParticleDefinition*     particle;
  const G4ParticleDefinition*     theProton;
  G4GlauberGribovCrossSection*    fGlauber;
  G4UPiNuclearCrossSection*       fPion;
  G4HadronNucleonXsc*             fHadron;
  G4ComponentSAIDTotalXS*         fSAID;
  G4bool                          isPiplus;
  G4bool                          isInitialized;
};

#endif