StorableInterpolationFunctor.h

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#ifndef NPSTAT_STORABLEINTERPOLATIONFUNCTOR_HH_
#define NPSTAT_STORABLEINTERPOLATIONFUNCTOR_HH_

#include "JetMETCorrections/InterpolationTables/interface/StorableMultivariateFunctor.h"
#include "JetMETCorrections/InterpolationTables/interface/LinInterpolatedTableND.h"
#include "JetMETCorrections/InterpolationTables/interface/SimpleFunctors.h"

namespace npstat {
    template
    <
        class Numeric,
        class Axis = UniformAxis,
        class Converter = Same<Numeric>
    >
    class StorableInterpolationFunctor : public StorableMultivariateFunctor
    {
        template <typename Num2, typename Axis2, typename Conv2>
        friend class StorableInterpolationFunctor;

    public:
        typedef LinInterpolatedTableND<Numeric,Axis> Table;


        template <class Num2>
        inline StorableInterpolationFunctor(
            const LinInterpolatedTableND<Num2,Axis>& table)
            : StorableMultivariateFunctor(), table_(table) {}

        template <class Num2>
        inline StorableInterpolationFunctor(
            const LinInterpolatedTableND<Num2,Axis>& table,
            const std::string& descr)
            : StorableMultivariateFunctor(descr), table_(table) {}

        template <class Num2, class Conv2>
        inline StorableInterpolationFunctor(
            const StorableInterpolationFunctor<Num2,Axis,Conv2>& tab)
            : StorableMultivariateFunctor(tab.description()),
              table_(tab.table_) {}


        inline StorableInterpolationFunctor(
            const std::vector<Axis>& axes,
            const std::vector<std::pair<bool,bool> >& interpolationType,
            const char* functionLabel=nullptr)
            : StorableMultivariateFunctor(),
              table_(axes, interpolationType, functionLabel) {}

        inline StorableInterpolationFunctor(
            const Axis& xAxis, bool leftX, bool rightX,
            const char* functionLabel=nullptr)
            : StorableMultivariateFunctor(),
              table_(xAxis, leftX, rightX, functionLabel) {}

        inline StorableInterpolationFunctor(
            const Axis& xAxis, bool leftX, bool rightX,
            const Axis& yAxis, bool leftY, bool rightY,
            const char* functionLabel=nullptr)
            : StorableMultivariateFunctor(),
              table_(xAxis, leftX, rightX,
                     yAxis, leftY, rightY, functionLabel) {}

        inline StorableInterpolationFunctor(
            const Axis& xAxis, bool leftX, bool rightX,
            const Axis& yAxis, bool leftY, bool rightY,
            const Axis& zAxis, bool leftZ, bool rightZ,
            const char* functionLabel=nullptr)
            : StorableMultivariateFunctor(),
              table_(xAxis, leftX, rightX,
                     yAxis, leftY, rightY,
                     zAxis, leftZ, rightZ, functionLabel) {}

        inline StorableInterpolationFunctor(
            const Axis& xAxis, bool leftX, bool rightX,
            const Axis& yAxis, bool leftY, bool rightY,
            const Axis& zAxis, bool leftZ, bool rightZ,
            const Axis& tAxis, bool leftT, bool rightT,
            const char* functionLabel=nullptr)
            : StorableMultivariateFunctor(),
              table_(xAxis, leftX, rightX,
                     yAxis, leftY, rightY,
                     zAxis, leftZ, rightZ,
                     tAxis, leftT, rightT, functionLabel) {}

        inline StorableInterpolationFunctor(
            const Axis& xAxis, bool leftX, bool rightX,
            const Axis& yAxis, bool leftY, bool rightY,
            const Axis& zAxis, bool leftZ, bool rightZ,
            const Axis& tAxis, bool leftT, bool rightT,
            const Axis& vAxis, bool leftV, bool rightV,
            const char* functionLabel=nullptr)
            : StorableMultivariateFunctor(),
              table_(xAxis, leftX, rightX,
                     yAxis, leftY, rightY,
                     zAxis, leftZ, rightZ,
                     tAxis, leftT, rightT,
                     vAxis, leftV, rightV, functionLabel) {}

        ~StorableInterpolationFunctor() override {}

        unsigned minDim() const override {return table_.dim();};

        double operator()(const double* point, unsigned dim) const override
            {return conv_(table_(point, dim));}


        inline Table& interpolator() {return table_;}
        inline const Table& interpolator() const {return table_;}


        inline ArrayND<Numeric>& table() {return table_.table();}
        inline const ArrayND<Numeric>& table() const {return table_.table();}

        inline void setConverter(const Converter& conv) {conv_ = conv;}

        // Method related to "geners" I/O
        gs::ClassId classId() const override {return gs::ClassId(*this);}
        bool write(std::ostream& of) const override;

        // I/O methods needed for reading
        static inline const char* classname();
        static inline unsigned version() {return 1;}
        static StorableInterpolationFunctor* read(
            const gs::ClassId& id, std::istream& in);

    protected:
        bool isEqual(const StorableMultivariateFunctor& other) const override
        {
            // Note the use of static_cast rather than dynamic_cast below.
            // static_cast works faster and it is guaranteed to succeed here.
            const StorableInterpolationFunctor& r = 
                static_cast<const StorableInterpolationFunctor&>(other);
            return table_ == r.table_ &&
                   this->description() == other.description();
        }

    private:
        StorableInterpolationFunctor() = delete;

        Table table_;
        Converter conv_;
    };
}

#include "Alignment/Geners/interface/binaryIO.hh"
#include "Alignment/Geners/interface/CPP11_auto_ptr.hh"
#include "Alignment/Geners/interface/IOException.hh"

namespace npstat {
    template <typename Numeric, class Axis, class Converter>
    const char* StorableInterpolationFunctor<Numeric,Axis,Converter>::classname()
    {
        static const std::string myClass(gs::template_class_name<Numeric,Axis>(
                                      "npstat::StorableInterpolationFunctor"));
        return myClass.c_str();
    }    

    template<typename Numeric, class Axis, class Converter>
    bool StorableInterpolationFunctor<Numeric,Axis,Converter>::write(
        std::ostream& of) const
    {
        gs::write_pod(of, this->description());
        return table_.classId().write(of) && table_.write(of);
    }

    template<typename Numeric, class Axis, class Converter>
    StorableInterpolationFunctor<Numeric,Axis,Converter>*
    StorableInterpolationFunctor<Numeric,Axis,Converter>::read(
        const gs::ClassId& id, std::istream& in)
    {
        static const gs::ClassId current(
            gs::ClassId::makeId<StorableInterpolationFunctor<Numeric,Axis> >());
        current.ensureSameId(id);

        std::string descr;
        gs::read_pod(in, &descr);
        gs::ClassId tabid(in, 1);
        if (in.fail()) throw gs::IOReadFailure(
            "In npstat::StorableInterpolationFunctor::read: "
            "input stream failure");
        CPP11_auto_ptr<Table> tab(Table::read(tabid, in));
        return new StorableInterpolationFunctor(*tab, descr);
    }
}


#endif // NPSTAT_STORABLEINTERPOLATIONFUNCTOR_HH_