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// 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
