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#ifndef _FUNCTOR_H_
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#define _FUNCTOR_H_
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#include <vector>
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using namespace std;
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class ObjFunctor0{
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public:
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virtual double operator()(vector<double>&)=0;
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};
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class PtrFunctor0 : ObjFunctor0{
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public:
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PtrFunctor0(double (*thePtrFunc)(vector<double>&)){
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ptrFunc = thePtrFunc;
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}
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virtual double operator()(vector<double>& arg){
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return (*ptrFunc)(arg);
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};
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protected:
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double (*ptrFunc)(vector<double>&);
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};
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//ClassMemObjFunctor class wraps a pointer pointing to a member function of a class
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//
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template<typename TClass>
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class ClassMemObjFunctor0 : public ObjFunctor0{
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public:
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ClassMemObjFunctor0(TClass* thePtrClass, double (TClass::*thePtrFunc)(vector<double>&)){
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ptrClass = thePtrClass;
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ptrFunc = thePtrFunc;
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}
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double operator()(vector<double>& arg){
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return (*ptrClass.*ptrFunc)(arg);
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}
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protected:
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double (TClass::*ptrFunc)(vector<double>&);
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TClass* ptrClass;
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};
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/**
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* Abstract class of object function which have an overloaded method
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* to calculate the gradient
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*/
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class ObjFunctor1{
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public:
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virtual double operator()(vector<double>&, vector<double>&)=0;
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};
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//PtrFunctor class wraps a pointer which points to an objct function.
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// PtrFunctor can be invoked by
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// functor(vector<double>&, vector<double>&)
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class PtrFunctor1 : ObjFunctor1{
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public:
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PtrFunctor1(double (*thePtrFunc)(vector<double>&, vector<double>&)){
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ptrFunc = thePtrFunc;
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}
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virtual double operator()(vector<double>& arg, vector<double>& grad){
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return (*ptrFunc)(arg, grad);
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};
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protected:
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double (*ptrFunc)(vector<double>&, vector<double>&);
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};
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//ClassMemObjFunctor class wraps a pointer pointing to a member function of a class
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//
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template<typename TClass>
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class ClassMemObjFunctor1 : public ObjFunctor1{
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public:
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ClassMemObjFunctor1(TClass* thePtrClass, double (TClass::*thePtrFunc)(vector<double>&, vector<double>&)){
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ptrClass = thePtrClass;
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ptrFunc = thePtrFunc;
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}
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double operator()(vector<double>&arg, vector<double>&grad){
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return (*ptrClass.*ptrFunc)(arg, grad);
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}
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protected:
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double (TClass::*ptrFunc)(vector<double>&, vector<double>&);
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TClass* ptrClass;
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};
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#endif
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