//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
// G4VImportanceSplitExaminer
//
// Class description:
//
// This interface is used internally by importance sampling. 
// It delivers G4Nsplit_Weight according to a track weight. 
// An implementation of the interface decides how to obtain 
// remaining necessary information about the ratio of importances
// in the pre and post "cell". 

// Author: Michael Dressel (CERN), 2002
// ----------------------------------------------------------------------
#ifndef G4VIMPORTANCESPLITEXAMINER_HH
#define G4VIMPORTANCESPLITEXAMINER_HH

#include "globals.hh"
#include "G4Nsplit_Weight.hh"

/**
 * @brief G4VImportanceSplitExaminer is an interface used internally by
 * importance sampling. It delivers G4Nsplit_Weight according to a track weight.
 * An implementation of the interface decides how to obtain remaining necessary
 * information about the ratio of importances in the pre and post "cell". 
 */

class G4VImportanceSplitExaminer
{
  public:

    /**
     * Default Constructor and Destructor.
     */
    G4VImportanceSplitExaminer() = default;
    virtual ~G4VImportanceSplitExaminer() = default;

    /**
     * Gets G4Nsplit_Weight for a given mother track weight.
     */
    virtual G4Nsplit_Weight Examine(G4double w) const = 0; 
};

#endif