AbsMultivariateFunctor.hh

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#ifndef NPSTAT_ABSMULTIVARIATEFUNCTOR_HH_
#define NPSTAT_ABSMULTIVARIATEFUNCTOR_HH_
 
/*!
// \file AbsMultivariateFunctor.hh
//
// \brief Interface definition for multidimensional functors
//
// Author: I. Volobouev
//
// May 2010
*/
 
namespace npstat {
    /**
    // Base class for a variety of multivariate functor-based calculations
    */
    struct AbsMultivariateFunctor
    {
        inline virtual ~AbsMultivariateFunctor() {}
 
        /** Function value */
        virtual double operator()(const double* point, unsigned dim) const = 0;
 
        /** Minimum expected dimensionality */
        virtual unsigned minDim() const = 0;
 
        /** 
        // Maximum expected dimensionality
        // (will typically be equal to the minimum)
        */
        inline virtual unsigned maxDim() const {return minDim();}
    };
 
    /**
    // Concrete multivariate functor class suitable for template instantiation
    */
    class MultivariateFunctorRef : public AbsMultivariateFunctor
    {
    public:
        inline MultivariateFunctorRef(const AbsMultivariateFunctor& ref)
            : ref_(ref) {}
        inline virtual ~MultivariateFunctorRef() {}
 
        inline virtual double operator()(const double* point, unsigned dim) const
            {return ref_(point, dim);}
 
        inline virtual unsigned minDim() const
            {return ref_.minDim();}
 
        inline virtual unsigned maxDim() const
            {return ref_.maxDim();}
 
    private:
        const AbsMultivariateFunctor& ref_;
    };
}
 
#endif // NPSTAT_ABSMULTIVARIATEFUNCTOR_HH_