DISStructureFunc.h

Go to the documentation of this file.

//____________________________________________________________________________
/*!
 
\class    genie::DISStructureFunc
 
\brief    A class holding Deep Inelastic Scattering (DIS) Form Factors
          (invariant structure funstions)
 
          This class is using the \b Strategy Pattern. \n
          It can accept requests to calculate itself, for a given interaction,
          that it then delegates to the algorithmic object, implementing the
          DISStructureFuncModelI interface, that it finds attached to itself.
 
\author   Costas Andreopoulos <c.andreopoulos \at cern.ch>
          University of Liverpool
 
\created  May 05, 2004
 
\cpright  Copyright (c) 2003-2025, The GENIE Collaboration
          For the full text of the license visit http://copyright.genie-mc.org          
*/
//____________________________________________________________________________
 
#ifndef _DIS_STRUCTURE_FUNCTIONS_H_
#define _DIS_STRUCTURE_FUNCTIONS_H_
 
#include <iostream>
 
#include "Physics/DeepInelastic/XSection/DISStructureFuncModelI.h"
#include "Framework/Interaction/Interaction.h"
 
using std::ostream;
 
namespace genie {
 
class DISStructureFunc;
ostream & operator << (ostream & stream, const DISStructureFunc & sf);
 
class DISStructureFunc {
 
public:
  DISStructureFunc();
  DISStructureFunc(const DISStructureFunc & form_factors);
  virtual ~DISStructureFunc() { }
 
  //! Attach an algorithm
  void SetModel  (const DISStructureFuncModelI * model);
 
  //! Calculate the S/F's for the input interaction using the attached algorithm
  void Calculate (const Interaction * interaction);
 
  //! Get the computed structure function F1
  double F1 (void) const { return fF1; }
 
  //! Get the computed structure function F2
  double F2 (void) const { return fF2; }
 
  //! Get the computed structure function F3
  double F3 (void) const { return fF3; }
 
  //! Get the computed structure function F4
  double F4 (void) const { return fF4; }
 
  //! Get the computed structure function F5
  double F5 (void) const { return fF5; }
 
  //! Get the computed structure function F6
  double F6 (void) const { return fF6; }
 
  //! Get the attached model
  const DISStructureFuncModelI * Model (void) const {return fModel;}
 
  void   Reset    (Option_t * opt="");
  void   Copy     (const DISStructureFunc & sf);
  bool   Compare  (const DISStructureFunc & sf) const;
  void   Print    (ostream & stream) const;
 
  bool               operator == (const DISStructureFunc & sf) const;
  DISStructureFunc & operator =  (const DISStructureFunc & sf);
  friend ostream &   operator << (ostream & stream, const DISStructureFunc & sf);
 
private:
 
  double fF1;
  double fF2;
  double fF3;
  double fF4;
  double fF5;
  double fF6;
 
  const DISStructureFuncModelI * fModel;
};
 
}       // genie namespace
 
#endif  // _DIS_STRUCTURE_FUNCTIONS_H_