XSecIntegratorI.h

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//____________________________________________________________________________
/*!
 
\class    genie::XSecIntegratorI
 
\brief    Cross Section Integrator Interface.
 
\author   Costas Andreopoulos <c.andreopoulos \at cern.ch>
          University of Liverpool
 
\created  May 03, 2004
 
\cpright  Copyright (c) 2003-2025, The GENIE Collaboration
          For the full text of the license visit http://copyright.genie-mc.org          
*/
//____________________________________________________________________________
 
#ifndef _XSEC_INTEGRATOR_I_H_
#define _XSEC_INTEGRATOR_I_H_
 
#include "Framework/Algorithm/Algorithm.h"
#include "Framework/EventGen/XSecAlgorithmI.h"
#include "Framework/Interaction/Interaction.h"
 
namespace genie {
 
class IntegratorI;
 
 class XSecIntegratorI : public Algorithm {
 
public:
  virtual ~XSecIntegratorI();
 
  virtual double Integrate(const XSecAlgorithmI * model,
                           const Interaction * interaction
                       /*, const KPhaseSpaceCut * cut=0*/) const= 0;
protected:
  XSecIntegratorI();
  XSecIntegratorI(string name);
  XSecIntegratorI(string name, string config);
 
  const IntegratorI * fIntegrator; ///< GENIE numerical integrator
 
  string fGSLIntgType;                     ///< name of GSL numerical integrator
  double fGSLRelTol;                       ///< required relative tolerance (error)
  int    fGSLMaxEval;                      ///< GSL max evaluations
  int    fGSLMinEval;                      ///< GSL min evaluations. Ignored by some integrators.
  unsigned int fGSLMaxSizeOfSubintervals;  ///< GSL maximum number of sub-intervals for 1D integrator
  unsigned int fGSLRule;                   ///< GSL Gauss-Kronrod integration rule (only for GSL 1D adaptive type)
 
};
 
}       // genie namespace
#endif  // _XSEC_INTEGRATOR_I_H_