// Copyright (c) 2006 Foundation for Research and Technology-Hellas (Greece).
// 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_VORONOI_DIAGRAM_2_IDENTITY_REJECTORS_H
#define CGAL_VORONOI_DIAGRAM_2_IDENTITY_REJECTORS_H 1

#include <CGAL/Voronoi_diagram_2/basic.h>

namespace CGAL {

namespace VoronoiDiagram_2 { namespace Internal {

//=========================================================================
//=========================================================================

struct Rejector_base
{
  inline void clear() {}
  inline void swap(Rejector_base&) {}
  inline bool is_valid() const { return true; }
};

//=========================================================================
//=========================================================================

template<class DG>
struct Identity_edge_rejector
  : public Rejector_base
{
  typedef DG                  Delaunay_graph;
  typedef bool                result_type;

  typedef typename Delaunay_graph::Edge                   Edge;
  typedef typename Delaunay_graph::Face_handle            Face_handle;
  typedef typename Delaunay_graph::Edge_circulator        Edge_circulator;
  typedef typename Delaunay_graph::All_edges_iterator     All_edges_iterator;
  typedef typename Delaunay_graph::Finite_edges_iterator  Finite_edges_iterator;

  bool operator()(const Delaunay_graph& ,
		  const Face_handle& , int ) const {
    return false;
  }

  bool operator()(const Delaunay_graph& , const Edge& ) const {
    return false;
  }

  bool operator()(const Delaunay_graph& ,
		  const All_edges_iterator& ) const {
    return false;
  }

  bool operator()(const Delaunay_graph& ,
		  const Finite_edges_iterator& ) const {
    return false;
  }

  bool operator()(const Delaunay_graph& ,
		  const Edge_circulator& ) const {
    return false;
  }
};

//=========================================================================
//=========================================================================

template<class DG>
struct Identity_face_rejector
  : public Rejector_base
{
  typedef DG                  Delaunay_graph;
  typedef bool                result_type;

  typedef typename Delaunay_graph::Vertex_handle  Vertex_handle;

  bool operator()(const Delaunay_graph&, const Vertex_handle&) const {
    return false;
  }
};

//=========================================================================
//=========================================================================


} } //namespace VoronoiDiagram_2::Internal

} //namespace CGAL


#endif // CGAL_VORONOI_DIAGRAM_2_IDENTITY_REJECTORS_H
