// Copyright (c) 2005  INRIA Sophia-Antipolis (France) 
// All rights reserved.
//
// Authors : Monique Teillaud <Monique.Teillaud@sophia.inria.fr>
//           Sylvain Pion     <Sylvain.Pion@sophia.inria.fr>
//           Constantinos Tsirogiannis
// 
// Partially supported by the IST Programme of the EU as a Shared-cost
// RTD (FET Open) Project under Contract No  IST-2000-26473 
// (ECG - Effective Computational Geometry for Curves and Surfaces) 
// and a STREP (FET Open) Project under Contract No  IST-006413 
// (ACS -- Algorithms for Complex Shapes)

#ifndef CGAL_ALGEBRAIC_KERNEL_CONVERTER_H
#define CGAL_ALGEBRAIC_KERNEL_CONVERTER_H

#include <CGAL/NT_converter.h>

CGAL_BEGIN_NAMESPACE

// TODO :
// - FT converter ?

template < class Al_K1, class Al_K2,
           class RT_converter = NT_converter<typename Al_K1::RT, 
                                             typename Al_K2::RT>,
	   class Root_of_converter = NT_converter<typename Al_K1::Root_of_2,
					          typename Al_K2::Root_of_2 > >
class Algebraic_kernel_converter {
public:

	typedef typename Al_K1::RT      RT_1;
	typedef typename Al_K2::RT      RT_2;
	typedef RT_converter            RT_type_converter;
	typedef Root_of_converter       Root_of_type_converter;

	typename Al_K2::Polynomial_1_2 operator () (const typename Al_K1::Polynomial_1_2 &p) const
	{
		return typename Al_K2::Polynomial_1_2(RT_converter()(p.a()),
                                                      RT_converter()(p.b()),
					              RT_converter()(p.c()));
	}

	typename Al_K2::Polynomial_for_circles_2_2 operator () 
               	(const typename Al_K1::Polynomial_for_circles_2_2 &p) const
	{
		return typename Al_K2::Polynomial_for_circles_2_2(RT_converter()(p.a()),
                                                                  RT_converter()(p.b()),
							          RT_converter()(p.r_sq()));
	}
};

CGAL_END_NAMESPACE

#endif // CGAL_ALGEBRAIC_KERNEL_CONVERTER_H