// Copyright (c) 2003,2004,2005,2006  INRIA Sophia-Antipolis (France).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
// You can redistribute it and/or modify it under the terms of the GNU
// General Public License as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL$
// $Id$
// 
//
// Author(s)     : Menelaos Karavelas <mkaravel@iacm.forth.gr>



#ifndef CGAL_SEGMENT_DELAUNAY_GRAPH_2_KERNEL_WRAPPER_2_H
#define CGAL_SEGMENT_DELAUNAY_GRAPH_2_KERNEL_WRAPPER_2_H

#include <CGAL/Segment_Delaunay_graph_2/basic.h>

#include <CGAL/Segment_Delaunay_graph_2/Constructions_C2.h>

#include <CGAL/Segment_Delaunay_graph_site_2.h>
#include <CGAL/Segment_Delaunay_graph_simple_site_2.h>



namespace CGAL {

namespace SegmentDelaunayGraph_2 {

namespace Internal {

  template<class K, class ITag> struct SDG_Which_site;

  // If the ITag is Tag_true we fully support intersections and
  // therefore we need the full-fletched site.
  template<class K>
  struct SDG_Which_site<K,Tag_true>
  {
    typedef K          Kernel;
    typedef Tag_true   Intersections_tag;

    typedef CGAL::Segment_Delaunay_graph_site_2<K> Site_2;

    typedef Construct_sdg_site_2<Site_2,Intersections_tag>
    Construct_site_2;
  };

  // If the ITag is Tag_false we are happy with the simple site.
  template<class K>
  struct SDG_Which_site<K,Tag_false>
  {
    typedef K          Kernel;
    typedef Tag_false  Intersections_tag;

    typedef CGAL::Segment_Delaunay_graph_simple_site_2<K> Site_2;

    typedef Construct_sdg_site_2<Site_2,Intersections_tag>
    Construct_site_2;
  };

} // namespace Internal



template<class Kernel_base_2, class ITag>
class Kernel_wrapper_2
  : public Kernel_base_2
{
public:
  typedef Kernel_base_2    Kernel_base;
  typedef ITag             Intersections_tag;

  typedef typename
  Internal::SDG_Which_site<Kernel_base,Intersections_tag>::Site_2  Site_2;

  typedef typename
  Internal::SDG_Which_site<Kernel_base,Intersections_tag>::Construct_site_2
  Construct_site_2;  
};


} //namespace SegmentDelaunayGraph_2

} //namespace CGAL


#endif // CGAL_SEGMENT_DELAUNAY_GRAPH_2_KERNEL_WRAPPER_2_H
