[906] | 1 | /* -*- C++ -*- |
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[1435] | 2 | * lemon/vector_map.h - Part of LEMON, a generic C++ optimization library |
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[906] | 3 | * |
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[1164] | 4 | * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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[1359] | 5 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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[906] | 6 | * |
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| 7 | * Permission to use, modify and distribute this software is granted |
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| 8 | * provided that this copyright notice appears in all copies. For |
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| 9 | * precise terms see the accompanying LICENSE file. |
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| 10 | * |
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| 11 | * This software is provided "AS IS" with no warranty of any kind, |
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| 12 | * express or implied, and with no claim as to its suitability for any |
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| 13 | * purpose. |
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| 14 | * |
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| 15 | */ |
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| 16 | |
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[921] | 17 | #ifndef LEMON_VECTOR_MAP_H |
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| 18 | #define LEMON_VECTOR_MAP_H |
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[822] | 19 | |
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| 20 | #include <vector> |
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[946] | 21 | #include <algorithm> |
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[822] | 22 | |
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[1267] | 23 | #include <lemon/utility.h> |
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[1307] | 24 | #include <lemon/bits/map_iterator.h> |
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| 25 | #include <lemon/bits/alteration_notifier.h> |
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[1669] | 26 | #include <lemon/concept_check.h> |
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| 27 | #include <lemon/concept/maps.h> |
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[822] | 28 | |
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[1669] | 29 | /// \ingroup graphmapfactory |
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| 30 | /// |
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[822] | 31 | ///\file |
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| 32 | ///\brief Vector based graph maps. |
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| 33 | |
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[921] | 34 | namespace lemon { |
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[1669] | 35 | |
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| 36 | /// \ingroup graphmapfactory |
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| 37 | /// |
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| 38 | /// \brief Graph map based on the std::vector storage. |
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| 39 | /// |
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[946] | 40 | /// The VectorMap template class is graph map structure what |
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| 41 | /// automatically updates the map when a key is added to or erased from |
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| 42 | /// the map. This map factory uses the allocators to implement |
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| 43 | /// the container functionality. This map factory |
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| 44 | /// uses the std::vector to implement the container function. |
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| 45 | /// |
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[1039] | 46 | /// \param Registry The AlterationNotifier that will notify this map. |
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[946] | 47 | /// \param IdMap The IdMap type of the graph items. |
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| 48 | /// \param Value The value type of the map. |
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| 49 | /// |
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| 50 | /// \author Balazs Dezso |
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| 51 | |
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| 52 | |
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[1267] | 53 | template < |
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| 54 | typename _Graph, |
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| 55 | typename _Item, |
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| 56 | typename _Value |
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| 57 | > |
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[1039] | 58 | class VectorMap : public AlterationNotifier<_Item>::ObserverBase { |
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[822] | 59 | public: |
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| 60 | |
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[946] | 61 | /// The graph type of the map. |
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| 62 | typedef _Graph Graph; |
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| 63 | /// The key type of the map. |
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[987] | 64 | typedef _Item Key; |
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[946] | 65 | /// The id map type of the map. |
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[1039] | 66 | typedef AlterationNotifier<_Item> Registry; |
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[946] | 67 | /// The value type of the map. |
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| 68 | typedef _Value Value; |
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[822] | 69 | |
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| 70 | /// The map type. |
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| 71 | typedef VectorMap Map; |
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[946] | 72 | /// The base class of the map. |
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| 73 | typedef typename Registry::ObserverBase Parent; |
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[822] | 74 | |
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| 75 | private: |
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| 76 | |
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| 77 | /// The container type of the map. |
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| 78 | typedef std::vector<Value> Container; |
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| 79 | |
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| 80 | public: |
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| 81 | |
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| 82 | /// The reference type of the map; |
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[987] | 83 | typedef typename Container::reference Reference; |
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[822] | 84 | /// The pointer type of the map; |
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[987] | 85 | typedef typename Container::pointer Pointer; |
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[822] | 86 | |
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| 87 | /// The const value type of the map. |
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[987] | 88 | typedef const Value ConstValue; |
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[822] | 89 | /// The const reference type of the map; |
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[987] | 90 | typedef typename Container::const_reference ConstReference; |
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[822] | 91 | /// The pointer type of the map; |
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[987] | 92 | typedef typename Container::const_pointer ConstPointer; |
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[822] | 93 | |
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[1267] | 94 | typedef True FullTypeTag; |
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| 95 | |
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[946] | 96 | /// Constructor to attach the new map into the registry. |
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[937] | 97 | |
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[946] | 98 | /// It construates a map and attachs it into the registry. |
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| 99 | /// It adds all the items of the graph to the map. |
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| 100 | |
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[980] | 101 | VectorMap(const Graph& _g) : graph(&_g) { |
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[1039] | 102 | attach(_g.getNotifier(_Item())); |
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[946] | 103 | build(); |
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| 104 | } |
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[822] | 105 | |
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[937] | 106 | /// Constructor uses given value to initialize the map. |
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| 107 | |
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[946] | 108 | /// It construates a map uses a given value to initialize the map. |
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| 109 | /// It adds all the items of the graph to the map. |
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| 110 | |
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[980] | 111 | VectorMap(const Graph& _g, const Value& _v) : graph(&_g) { |
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[1039] | 112 | attach(_g.getNotifier(_Item())); |
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[980] | 113 | container.resize(graph->maxId(_Item()) + 1, _v); |
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[946] | 114 | } |
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[822] | 115 | |
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[1374] | 116 | VectorMap(const VectorMap& _copy) |
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| 117 | : Parent(), graph(_copy.getGraph()) { |
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[980] | 118 | if (_copy.attached()) { |
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| 119 | attach(*_copy.getRegistry()); |
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| 120 | container = _copy.container; |
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[822] | 121 | } |
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| 122 | } |
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| 123 | |
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[946] | 124 | virtual ~VectorMap() { |
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| 125 | if (attached()) { |
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| 126 | detach(); |
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[822] | 127 | } |
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[946] | 128 | } |
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| 129 | |
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[1669] | 130 | |
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| 131 | private: |
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| 132 | |
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| 133 | VectorMap& operator=(const VectorMap&); |
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| 134 | |
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| 135 | protected: |
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| 136 | |
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| 137 | using Parent::attach; |
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| 138 | using Parent::detach; |
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| 139 | using Parent::attached; |
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| 140 | |
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[946] | 141 | const Graph* getGraph() const { |
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| 142 | return graph; |
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[822] | 143 | } |
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[937] | 144 | |
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[1669] | 145 | public: |
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| 146 | |
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[937] | 147 | /// The subcript operator. |
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| 148 | |
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[946] | 149 | /// The subscript operator. The map can be subscripted by the |
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| 150 | /// actual items of the graph. |
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| 151 | |
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[987] | 152 | Reference operator[](const Key& key) { |
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[980] | 153 | return container[graph->id(key)]; |
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[822] | 154 | } |
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| 155 | |
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[937] | 156 | /// The const subcript operator. |
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| 157 | |
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[946] | 158 | /// The const subscript operator. The map can be subscripted by the |
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| 159 | /// actual items of the graph. |
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| 160 | |
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[987] | 161 | ConstReference operator[](const Key& key) const { |
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[980] | 162 | return container[graph->id(key)]; |
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[822] | 163 | } |
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| 164 | |
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[937] | 165 | |
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[946] | 166 | /// The setter function of the map. |
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| 167 | |
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| 168 | /// It the same as operator[](key) = value expression. |
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| 169 | /// |
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[987] | 170 | void set(const Key& key, const Value& value) { |
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[946] | 171 | (*this)[key] = value; |
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[822] | 172 | } |
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[946] | 173 | |
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[1669] | 174 | protected: |
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| 175 | |
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| 176 | /// \brief Adds a new key to the map. |
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| 177 | /// |
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[946] | 178 | /// It adds a new key to the map. It called by the observer registry |
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| 179 | /// and it overrides the add() member function of the observer base. |
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| 180 | |
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[987] | 181 | void add(const Key& key) { |
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[980] | 182 | int id = graph->id(key); |
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[822] | 183 | if (id >= (int)container.size()) { |
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| 184 | container.resize(id + 1); |
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| 185 | } |
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| 186 | } |
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[937] | 187 | |
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| 188 | /// Erases a key from the map. |
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[822] | 189 | |
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[946] | 190 | /// Erase a key from the map. It called by the observer registry |
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| 191 | /// and it overrides the erase() member function of the observer base. |
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[987] | 192 | void erase(const Key&) {} |
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[822] | 193 | |
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[946] | 194 | /// Buildes the map. |
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| 195 | |
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| 196 | /// It buildes the map. It called by the observer registry |
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| 197 | /// and it overrides the build() member function of the observer base. |
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[937] | 198 | |
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[946] | 199 | void build() { |
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[980] | 200 | container.resize(graph->maxId(_Item()) + 1); |
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[946] | 201 | } |
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[937] | 202 | |
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[946] | 203 | /// Clear the map. |
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| 204 | |
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| 205 | /// It erase all items from the map. It called by the observer registry |
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| 206 | /// and it overrides the clear() member function of the observer base. |
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[822] | 207 | void clear() { |
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| 208 | container.clear(); |
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| 209 | } |
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[1267] | 210 | |
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[822] | 211 | private: |
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| 212 | |
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| 213 | Container container; |
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[946] | 214 | const Graph *graph; |
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[822] | 215 | |
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[946] | 216 | }; |
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| 217 | |
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[822] | 218 | } |
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| 219 | |
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| 220 | #endif |
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