FitStatus.h

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// ************************************************************************** //
//
//  BornAgain: simulate and fit scattering at grazing incidence
//
//! @file      Core/Fitting/FitStatus.h
//! @brief     Defines class FitStatus.
//!
//! @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_CORE_FITTING_FITSTATUS_H
#define BORNAGAIN_CORE_FITTING_FITSTATUS_H
 
#include "Core/Fitting/FitObserver.h"
#include "Core/Fitting/IterationInfo.h"
#include <functional>
#include <vector>
 
namespace Fit
{
class MinimizerResult;
}
class FitObjective;
class FitPrintService;
 
//! Contains status of the fitting (running, interupted etc) and all intermediate
//! information which has to be collected during the fit.
//! Owned by FitObjective.
 
class FitStatus
{
public:
    FitStatus(const FitObjective* fit_objective);
    ~FitStatus();
 
    void setInterrupted();
    bool isInterrupted() const;
    bool isCompleted() const;
 
    void update(const Fit::Parameters& params, double chi2);
 
    void initPrint(int every_nth);
 
    void addObserver(int every_nth, fit_observer_t);
 
    IterationInfo iterationInfo() const;
 
    Fit::MinimizerResult minimizerResult() const;
 
    //! Should be explicitely called on last iteration to notify all observers.
    void finalize(const Fit::MinimizerResult& result);
 
private:
    enum EFitStatus { IDLE, RUNNING, COMPLETED, FAILED, INTERRUPTED };
    EFitStatus m_fit_status;
    FitObserver<FitObjective> m_observers;
    std::unique_ptr<FitPrintService> m_print_service;
    const FitObjective* m_fit_objective;
    IterationInfo m_iterationInfo;
    std::unique_ptr<Fit::MinimizerResult> m_minimizer_result;
};
 
#endif // BORNAGAIN_CORE_FITTING_FITSTATUS_H