// ======================================================================
//
// Copyright (c) 1997 The CGAL Consortium
//
// This software and related documentation is part of an INTERNAL release
// of the Computational Geometry Algorithms Library (CGAL). It is not
// intended for general use.
//
// ----------------------------------------------------------------------
//
// release       : 
// release_date  : 2000, August 09
//
// file          : include/CGAL/Tree_traits.h
// package       : SearchStructures (2.54)
// maintainer    : Philipp Kramer <kramer@inf.ethz.ch>
// source        : include/CGAL/Tree_traits.h
// revision      : $Revision$
// revision_date : $Date$
// author(s)     : Gabriele Neyer
//
// coordinator   : Peter Widmayer, ETH Zurich
//
//
// email         : cgal@cs.uu.nl
//
// ======================================================================


#ifndef __CGAL_tree_traits__
#define __CGAL_tree_traits__

// Implementation of a minimal tree traits for CGAL trees, derived 
// from Tree_base.h
// (e.g. Range_tree_d.h and Segment_tree_d.h).
// Any other interface must at least provide the interface of this class.

CGAL_BEGIN_NAMESPACE

// Interface as it is expected for one layer of a Range Tree
template<class C_Data, class C_Window, class C_Key,          
         class C_Data_func, class C_Window_left_func, 
	 class C_Window_right_func, class C_Compare>
class tree_point_traits{
 public:
  typedef  C_Key Key;
  typedef  C_Data Data;
  typedef  C_Window Window;
  typedef  C_Compare Compare;

   C_Key get_key(const  C_Data&  dt)
    const {return  C_Data_func()(dt);}
   C_Key get_left(const  C_Window& dt)
    const {return  C_Window_left_func()(dt);}
   C_Key get_right(const  C_Window& dt)
    const {return  C_Window_right_func()(dt);}

  static bool comp( C_Key const& key1,  C_Key const& key2) 
  {return  C_Compare()(key1, key2);} 
  static bool key_comp( C_Data const& data1,  C_Data const& data2)
  {
    const Key d1= C_Data_func()(data1);
    const Key d2= C_Data_func()(data2);
    return  C_Compare()(d1,d2);
  }
};


// Interface as it is expected for one layer of a Segment Tree
template<class C_Data, class C_Window, class C_Key,  
         class C_Data_left_func, class C_Data_right_func, 
	 class C_Window_left_func, class C_Window_right_func, class C_Compare>
class tree_interval_traits{
 public:
  typedef  C_Data Data;
  typedef  C_Window Window;
  typedef  C_Key Key;
  typedef  C_Compare Compare;
  
   C_Key get_left(const  C_Data&  dt)
    const {return  C_Data_left_func()(dt);}
   C_Key get_right(const  C_Data& dt)
    const {return  C_Data_right_func()(dt);}
   C_Key get_left_win(const  C_Window& dt)
    const {return  C_Window_left_func()(dt);}
   C_Key get_right_win(const  C_Window& dt)
    const {return  C_Window_right_func()(dt);}

  static bool comp( C_Key const& key1,  C_Key const& key2) 
    {return  C_Compare()(key1, key2);} 
};

CGAL_END_NAMESPACE
#endif