ObjectiveFunctionAdapter.h

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// ************************************************************************** //
//
//  BornAgain: simulate and fit scattering at grazing incidence
//
//! @file      Fit/RootAdapter/ObjectiveFunctionAdapter.h
//! @brief     Declares class ObjectiveFunctionAdapter.
//!
//! @homepage  http://www.bornagainproject.org
//! @license   GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors   Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************** //
 
#ifndef BORNAGAIN_FIT_ROOTADAPTER_OBJECTIVEFUNCTIONADAPTER_H
#define BORNAGAIN_FIT_ROOTADAPTER_OBJECTIVEFUNCTIONADAPTER_H
 
#include "Fit/Kernel/KernelTypes.h"
#include <memory>
 
class RootScalarFunction;
class RootResidualFunction;
 
namespace Fit
{
 
class IFunctionAdapter;
class Parameters;
 
//! Converts user objective function to function ROOT expects.
//! Handles time of life of function objects.
 
class ObjectiveFunctionAdapter
{
public:
    ObjectiveFunctionAdapter();
    ~ObjectiveFunctionAdapter();
 
    const RootScalarFunction* rootObjectiveFunction(fcn_scalar_t fcn, const Parameters& parameters);
 
    const RootResidualFunction* rootResidualFunction(fcn_residual_t fcn,
                                                     const Parameters& parameters);
 
    int numberOfCalls() const;
    int numberOfGradientCalls() const;
 
private:
    std::unique_ptr<IFunctionAdapter> m_adapter;
};
 
} // namespace Fit
 
#endif // BORNAGAIN_FIT_ROOTADAPTER_OBJECTIVEFUNCTIONADAPTER_H