/* -*- mode: C++; indent-tabs-mode: nil; -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library.

 *

 * Copyright (C) 2003-2009

 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

 * (Egervary Research Group on Combinatorial Optimization, EGRES).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

#ifndef LEMON_BITS_TRAITS_H

#define LEMON_BITS_TRAITS_H

//\file

//\brief Traits for graphs and maps

//

#include <lemon/bits/enable_if.h>

namespace lemon {

  struct InvalidType {};

  template <typename GR, typename _Item>

  class ItemSetTraits {};

  template <typename GR, typename Enable = void>

  struct NodeNotifierIndicator {

    typedef InvalidType Type;

  };

  template <typename GR>

  struct NodeNotifierIndicator<

    GR,

    typename enable_if<typename GR::NodeNotifier::Notifier, void>::type

  > {

    typedef typename GR::NodeNotifier Type;

  };

  template <typename GR>

  class ItemSetTraits<GR, typename GR::Node> {

  public:

    typedef GR Graph;

    typedef GR Digraph;

    typedef typename GR::Node Item;

    typedef typename GR::NodeIt ItemIt;

    typedef typename NodeNotifierIndicator<GR>::Type ItemNotifier;

    template <typename V>

    class Map : public GR::template NodeMap<V> {

      typedef typename GR::template NodeMap<V> Parent;

    public:

      typedef typename GR::template NodeMap<V> Type;

      typedef typename Parent::Value Value;

      Map(const GR& _digraph) : Parent(_digraph) {}

      Map(const GR& _digraph, const Value& _value)

        : Parent(_digraph, _value) {}

     };

  };

  template <typename GR, typename Enable = void>

  struct ArcNotifierIndicator {

    typedef InvalidType Type;

  };

  template <typename GR>

  struct ArcNotifierIndicator<

    GR,

    typename enable_if<typename GR::ArcNotifier::Notifier, void>::type

  > {

    typedef typename GR::ArcNotifier Type;

  };

  template <typename GR>

  class ItemSetTraits<GR, typename GR::Arc> {

  public:

    typedef GR Graph;

    typedef GR Digraph;

    typedef typename GR::Arc Item;

    typedef typename GR::ArcIt ItemIt;

    typedef typename ArcNotifierIndicator<GR>::Type ItemNotifier;

    template <typename V>

    class Map : public GR::template ArcMap<V> {

      typedef typename GR::template ArcMap<V> Parent;

    public:

      typedef typename GR::template ArcMap<V> Type;

      typedef typename Parent::Value Value;

      Map(const GR& _digraph) : Parent(_digraph) {}

      Map(const GR& _digraph, const Value& _value)

        : Parent(_digraph, _value) {}

    };

  };

  template <typename GR, typename Enable = void>

  struct EdgeNotifierIndicator {

    typedef InvalidType Type;

  };

  template <typename GR>

  struct EdgeNotifierIndicator<

    GR,

    typename enable_if<typename GR::EdgeNotifier::Notifier, void>::type

  > {

    typedef typename GR::EdgeNotifier Type;

  };

  template <typename GR>

  class ItemSetTraits<GR, typename GR::Edge> {

  public:

    typedef GR Graph;

    typedef GR Digraph;

    typedef typename GR::Edge Item;

    typedef typename GR::EdgeIt ItemIt;

    typedef typename EdgeNotifierIndicator<GR>::Type ItemNotifier;

    template <typename V>

    class Map : public GR::template EdgeMap<V> {

      typedef typename GR::template EdgeMap<V> Parent;

    public:

      typedef typename GR::template EdgeMap<V> Type;

      typedef typename Parent::Value Value;

      Map(const GR& _digraph) : Parent(_digraph) {}

      Map(const GR& _digraph, const Value& _value)

        : Parent(_digraph, _value) {}

    };

  };

  template <typename Map, typename Enable = void>

  struct MapTraits {

    typedef False ReferenceMapTag;

    typedef typename Map::Key Key;

    typedef typename Map::Value Value;

    typedef Value ConstReturnValue;

    typedef Value ReturnValue;

  };

  template <typename Map>

  struct MapTraits<

    Map, typename enable_if<typename Map::ReferenceMapTag, void>::type >

  {

    typedef True ReferenceMapTag;

    typedef typename Map::Key Key;

    typedef typename Map::Value Value;

    typedef typename Map::ConstReference ConstReturnValue;

    typedef typename Map::Reference ReturnValue;

    typedef typename Map::ConstReference ConstReference;

    typedef typename Map::Reference Reference;

 };

  template <typename MatrixMap, typename Enable = void>

  struct MatrixMapTraits {

    typedef False ReferenceMapTag;

    typedef typename MatrixMap::FirstKey FirstKey;

    typedef typename MatrixMap::SecondKey SecondKey;

    typedef typename MatrixMap::Value Value;

    typedef Value ConstReturnValue;

    typedef Value ReturnValue;

  };

  template <typename MatrixMap>

  struct MatrixMapTraits<

    MatrixMap, typename enable_if<typename MatrixMap::ReferenceMapTag,

                                  void>::type >

  {

    typedef True ReferenceMapTag;

    typedef typename MatrixMap::FirstKey FirstKey;

    typedef typename MatrixMap::SecondKey SecondKey;

    typedef typename MatrixMap::Value Value;

    typedef typename MatrixMap::ConstReference ConstReturnValue;

    typedef typename MatrixMap::Reference ReturnValue;

    typedef typename MatrixMap::ConstReference ConstReference;

    typedef typename MatrixMap::Reference Reference;

 };

  // Indicators for the tags

  template <typename GR, typename Enable = void>

  struct NodeNumTagIndicator {

    static const bool value = false;

  };

  template <typename GR>

  struct NodeNumTagIndicator<

    GR,

    typename enable_if<typename GR::NodeNumTag, void>::type

  > {

    static const bool value = true;

  };

  template <typename GR, typename Enable = void>

  struct ArcNumTagIndicator {

    static const bool value = false;

  };

  template <typename GR>

  struct ArcNumTagIndicator<

    GR,

    typename enable_if<typename GR::ArcNumTag, void>::type

  > {

    static const bool value = true;

  };

  template <typename GR, typename Enable = void>

  struct EdgeNumTagIndicator {

    static const bool value = false;

  };

  template <typename GR>

  struct EdgeNumTagIndicator<

    GR,

    typename enable_if<typename GR::EdgeNumTag, void>::type

  > {

    static const bool value = true;

  };

  template <typename GR, typename Enable = void>

  struct FindArcTagIndicator {

    static const bool value = false;

  };

  template <typename GR>

  struct FindArcTagIndicator<

    GR,

    typename enable_if<typename GR::FindArcTag, void>::type

  > {

    static const bool value = true;

  };

  template <typename GR, typename Enable = void>

  struct FindEdgeTagIndicator {

    static const bool value = false;

  };

  template <typename GR>

  struct FindEdgeTagIndicator<

    GR,

    typename enable_if<typename GR::FindEdgeTag, void>::type

  > {

    static const bool value = true;

  };

  template <typename GR, typename Enable = void>

  struct UndirectedTagIndicator {

    static const bool value = false;

  };

  template <typename GR>

  struct UndirectedTagIndicator<

    GR,

    typename enable_if<typename GR::UndirectedTag, void>::type

  > {

    static const bool value = true;

  };

  template <typename GR, typename Enable = void>

  struct BuildTagIndicator {

    static const bool value = false;

  };

  template <typename GR>

  struct BuildTagIndicator<

    GR,

    typename enable_if<typename GR::BuildTag, void>::type

  > {

    static const bool value = true;

  };

}

#endif