AbsFFTJetScaleCalculator.h

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#ifndef JetMETCorrections_FFTJetObjects_AbsFFTJetScaleCalculator_h
#define JetMETCorrections_FFTJetObjects_AbsFFTJetScaleCalculator_h

#include <vector>
#include "Alignment/Geners/interface/CPP11_shared_ptr.hh"
#include "JetMETCorrections/InterpolationTables/interface/AbsMultivariateFunctor.h"

template<class Jet, class Adjustable>
class AbsFFTJetScaleCalculator
{
public:
    typedef Jet jet_type;
    typedef Adjustable adjustable_type;

    inline explicit AbsFFTJetScaleCalculator(
        CPP11_shared_ptr<npstat::AbsMultivariateFunctor> f)
        : functor(f), buffer_(f->minDim()) {}

    inline virtual ~AbsFFTJetScaleCalculator() {}

    inline double scale(const Jet& jet, const Adjustable& current) const
    {
        const unsigned dim = buffer_.size();
        double* buf = dim ? &buffer_[0] : static_cast<double*>(nullptr);
        this->map(jet, current, buf, dim);
        return (*functor)(buf, dim);
    }

private:
    AbsFFTJetScaleCalculator() = delete;

    virtual void map(const Jet& jet,
                     const Adjustable& current,
                     double* buf, unsigned dim) const = 0;

    CPP11_shared_ptr<npstat::AbsMultivariateFunctor> functor;
    mutable std::vector<double> buffer_;
};

#endif // JetMETCorrections_FFTJetObjects_AbsFFTJetScaleCalculator_h