/**
   \file func_model.hpp
   \brief model wrapper of raw function
   \author Junhua Gu
 */



#ifndef FUNC_MODEL_H_
#define FUNC_MODEL_H_
#define OPT_HEADER
#include <core/fitter.hpp>
#include <cmath>
#include <iostream>
#include <string>
#include <sstream>
namespace opt_utilities
{
  template <typename T>
  class func_model
    :public model<T,T,std::vector<T>,std::string>
  {
  private:
    T (*func)(T x,const T* const& p);
    int nparams;
  private:
    model<T,T,std::vector<T> >* do_clone()const
    {
      return new func_model<T>(*this);
    }

    const char* do_get_type_name()const
    {
      return "function wrapping model";
    }

    //  public:
  private:
    func_model()
    {}


  public:
    func_model(T (*_func)(T x,const T* const& p),int n)
      :func(_func),nparams(n)
    {
      for(int i=0;i!=n;++i)
	{
	  std::ostringstream oss;
	  oss<<i;
	  this->push_param_info(param_info<std::vector<T> >(oss.str(),0));
	}
    }


    T do_eval(const T& x,const std::vector<T>& param)
    {
      return func(x,&get_element(param,0));
    }
  private:
    std::string do_get_information()const
    {
      return "Wrapper for necked C function\n";
    }
  };
}



#endif
//EOF