1 | /* -*- C++ -*- |
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2 | * |
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3 | * This file is a part of LEMON, a generic C++ optimization library |
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4 | * |
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5 | * Copyright (C) 2003-2008 |
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6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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8 | * |
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9 | * Permission to use, modify and distribute this software is granted |
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10 | * provided that this copyright notice appears in all copies. For |
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11 | * precise terms see the accompanying LICENSE file. |
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12 | * |
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13 | * This software is provided "AS IS" with no warranty of any kind, |
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14 | * express or implied, and with no claim as to its suitability for any |
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15 | * purpose. |
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16 | * |
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17 | */ |
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18 | |
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19 | #ifndef LEMON_GRAPH_ADAPTOR_H |
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20 | #define LEMON_GRAPH_ADAPTOR_H |
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21 | |
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22 | ///\ingroup graph_adaptors |
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23 | ///\file |
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24 | ///\brief Several graph adaptors. |
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25 | /// |
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26 | ///This file contains several useful graph adaptor functions. |
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27 | /// |
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28 | ///\author Marton Makai and Balazs Dezso |
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29 | |
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30 | #include <lemon/bits/invalid.h> |
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31 | #include <lemon/bits/variant.h> |
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32 | #include <lemon/maps.h> |
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33 | |
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34 | #include <lemon/bits/base_extender.h> |
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35 | #include <lemon/bits/graph_adaptor_extender.h> |
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36 | #include <lemon/bits/graph_extender.h> |
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37 | #include <lemon/tolerance.h> |
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38 | |
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39 | #include <algorithm> |
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40 | |
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41 | namespace lemon { |
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42 | |
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43 | ///\brief Base type for the Graph Adaptors |
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44 | /// |
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45 | ///Base type for the Graph Adaptors |
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46 | /// |
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47 | ///This is the base type for most of LEMON graph adaptors. |
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48 | ///This class implements a trivial graph adaptor i.e. it only wraps the |
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49 | ///functions and types of the graph. The purpose of this class is to |
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50 | ///make easier implementing graph adaptors. E.g. if an adaptor is |
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51 | ///considered which differs from the wrapped graph only in some of its |
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52 | ///functions or types, then it can be derived from GraphAdaptor, |
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53 | ///and only the |
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54 | ///differences should be implemented. |
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55 | /// |
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56 | ///author Marton Makai |
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57 | template<typename _Graph> |
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58 | class GraphAdaptorBase { |
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59 | public: |
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60 | typedef _Graph Graph; |
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61 | typedef GraphAdaptorBase Adaptor; |
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62 | typedef Graph ParentGraph; |
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63 | |
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64 | protected: |
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65 | Graph* graph; |
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66 | GraphAdaptorBase() : graph(0) { } |
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67 | void setGraph(Graph& _graph) { graph=&_graph; } |
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68 | |
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69 | public: |
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70 | GraphAdaptorBase(Graph& _graph) : graph(&_graph) { } |
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71 | |
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72 | typedef typename Graph::Node Node; |
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73 | typedef typename Graph::Edge Edge; |
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74 | |
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75 | void first(Node& i) const { graph->first(i); } |
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76 | void first(Edge& i) const { graph->first(i); } |
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77 | void firstIn(Edge& i, const Node& n) const { graph->firstIn(i, n); } |
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78 | void firstOut(Edge& i, const Node& n ) const { graph->firstOut(i, n); } |
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79 | |
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80 | void next(Node& i) const { graph->next(i); } |
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81 | void next(Edge& i) const { graph->next(i); } |
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82 | void nextIn(Edge& i) const { graph->nextIn(i); } |
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83 | void nextOut(Edge& i) const { graph->nextOut(i); } |
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84 | |
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85 | Node source(const Edge& e) const { return graph->source(e); } |
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86 | Node target(const Edge& e) const { return graph->target(e); } |
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87 | |
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88 | typedef NodeNumTagIndicator<Graph> NodeNumTag; |
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89 | int nodeNum() const { return graph->nodeNum(); } |
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90 | |
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91 | typedef EdgeNumTagIndicator<Graph> EdgeNumTag; |
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92 | int edgeNum() const { return graph->edgeNum(); } |
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93 | |
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94 | typedef FindEdgeTagIndicator<Graph> FindEdgeTag; |
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95 | Edge findEdge(const Node& u, const Node& v, |
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96 | const Edge& prev = INVALID) { |
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97 | return graph->findEdge(u, v, prev); |
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98 | } |
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99 | |
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100 | Node addNode() const { |
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101 | return Node(graph->addNode()); |
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102 | } |
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103 | |
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104 | Edge addEdge(const Node& u, const Node& v) const { |
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105 | return Edge(graph->addEdge(u, v)); |
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106 | } |
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107 | |
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108 | void erase(const Node& i) const { graph->erase(i); } |
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109 | void erase(const Edge& i) const { graph->erase(i); } |
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110 | |
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111 | void clear() const { graph->clear(); } |
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112 | |
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113 | int id(const Node& v) const { return graph->id(v); } |
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114 | int id(const Edge& e) const { return graph->id(e); } |
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115 | |
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116 | Node fromNodeId(int ix) const { |
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117 | return graph->fromNodeId(ix); |
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118 | } |
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119 | |
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120 | Edge fromEdgeId(int ix) const { |
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121 | return graph->fromEdgeId(ix); |
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122 | } |
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123 | |
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124 | int maxNodeId() const { |
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125 | return graph->maxNodeId(); |
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126 | } |
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127 | |
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128 | int maxEdgeId() const { |
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129 | return graph->maxEdgeId(); |
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130 | } |
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131 | |
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132 | typedef typename ItemSetTraits<Graph, Node>::ItemNotifier NodeNotifier; |
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133 | |
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134 | NodeNotifier& notifier(Node) const { |
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135 | return graph->notifier(Node()); |
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136 | } |
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137 | |
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138 | typedef typename ItemSetTraits<Graph, Edge>::ItemNotifier EdgeNotifier; |
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139 | |
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140 | EdgeNotifier& notifier(Edge) const { |
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141 | return graph->notifier(Edge()); |
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142 | } |
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143 | |
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144 | template <typename _Value> |
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145 | class NodeMap : public Graph::template NodeMap<_Value> { |
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146 | public: |
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147 | |
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148 | typedef typename Graph::template NodeMap<_Value> Parent; |
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149 | |
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150 | explicit NodeMap(const Adaptor& ga) |
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151 | : Parent(*ga.graph) {} |
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152 | |
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153 | NodeMap(const Adaptor& ga, const _Value& value) |
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154 | : Parent(*ga.graph, value) { } |
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155 | |
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156 | NodeMap& operator=(const NodeMap& cmap) { |
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157 | return operator=<NodeMap>(cmap); |
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158 | } |
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159 | |
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160 | template <typename CMap> |
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161 | NodeMap& operator=(const CMap& cmap) { |
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162 | Parent::operator=(cmap); |
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163 | return *this; |
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164 | } |
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165 | |
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166 | }; |
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167 | |
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168 | template <typename _Value> |
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169 | class EdgeMap : public Graph::template EdgeMap<_Value> { |
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170 | public: |
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171 | |
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172 | typedef typename Graph::template EdgeMap<_Value> Parent; |
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173 | |
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174 | explicit EdgeMap(const Adaptor& ga) |
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175 | : Parent(*ga.graph) {} |
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176 | |
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177 | EdgeMap(const Adaptor& ga, const _Value& value) |
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178 | : Parent(*ga.graph, value) {} |
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179 | |
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180 | EdgeMap& operator=(const EdgeMap& cmap) { |
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181 | return operator=<EdgeMap>(cmap); |
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182 | } |
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183 | |
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184 | template <typename CMap> |
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185 | EdgeMap& operator=(const CMap& cmap) { |
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186 | Parent::operator=(cmap); |
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187 | return *this; |
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188 | } |
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189 | |
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190 | }; |
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191 | |
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192 | }; |
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193 | |
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194 | ///\ingroup graph_adaptors |
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195 | /// |
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196 | ///\brief Trivial Graph Adaptor |
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197 | /// |
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198 | /// This class is an adaptor which does not change the adapted graph. |
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199 | /// It can be used only to test the graph adaptors. |
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200 | template <typename _Graph> |
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201 | class GraphAdaptor : |
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202 | public GraphAdaptorExtender<GraphAdaptorBase<_Graph> > { |
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203 | public: |
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204 | typedef _Graph Graph; |
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205 | typedef GraphAdaptorExtender<GraphAdaptorBase<_Graph> > Parent; |
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206 | protected: |
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207 | GraphAdaptor() : Parent() { } |
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208 | |
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209 | public: |
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210 | explicit GraphAdaptor(Graph& _graph) { setGraph(_graph); } |
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211 | }; |
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212 | |
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213 | /// \brief Just gives back a graph adaptor |
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214 | /// |
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215 | /// Just gives back a graph adaptor which |
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216 | /// should be provide original graph |
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217 | template<typename Graph> |
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218 | GraphAdaptor<const Graph> |
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219 | graphAdaptor(const Graph& graph) { |
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220 | return GraphAdaptor<const Graph>(graph); |
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221 | } |
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222 | |
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223 | |
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224 | template <typename _Graph> |
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225 | class RevGraphAdaptorBase : public GraphAdaptorBase<_Graph> { |
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226 | public: |
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227 | typedef _Graph Graph; |
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228 | typedef GraphAdaptorBase<_Graph> Parent; |
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229 | protected: |
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230 | RevGraphAdaptorBase() : Parent() { } |
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231 | public: |
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232 | typedef typename Parent::Node Node; |
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233 | typedef typename Parent::Edge Edge; |
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234 | |
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235 | void firstIn(Edge& i, const Node& n) const { Parent::firstOut(i, n); } |
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236 | void firstOut(Edge& i, const Node& n ) const { Parent::firstIn(i, n); } |
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237 | |
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238 | void nextIn(Edge& i) const { Parent::nextOut(i); } |
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239 | void nextOut(Edge& i) const { Parent::nextIn(i); } |
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240 | |
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241 | Node source(const Edge& e) const { return Parent::target(e); } |
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242 | Node target(const Edge& e) const { return Parent::source(e); } |
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243 | |
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244 | typedef FindEdgeTagIndicator<Graph> FindEdgeTag; |
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245 | Edge findEdge(const Node& u, const Node& v, |
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246 | const Edge& prev = INVALID) { |
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247 | return Parent::findEdge(v, u, prev); |
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248 | } |
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249 | |
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250 | }; |
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251 | |
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252 | |
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253 | ///\ingroup graph_adaptors |
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254 | /// |
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255 | ///\brief A graph adaptor which reverses the orientation of the edges. |
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256 | /// |
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257 | /// If \c g is defined as |
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258 | ///\code |
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259 | /// ListGraph g; |
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260 | ///\endcode |
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261 | /// then |
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262 | ///\code |
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263 | /// RevGraphAdaptor<ListGraph> ga(g); |
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264 | ///\endcode |
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265 | /// implements the graph obtained from \c g by |
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266 | /// reversing the orientation of its edges. |
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267 | /// |
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268 | /// A good example of using RevGraphAdaptor is to decide that the |
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269 | /// directed graph is wheter strongly connected or not. If from one |
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270 | /// node each node is reachable and from each node is reachable this |
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271 | /// node then and just then the graph is strongly connected. Instead of |
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272 | /// this condition we use a little bit different. From one node each node |
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273 | /// ahould be reachable in the graph and in the reversed graph. Now this |
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274 | /// condition can be checked with the Dfs algorithm class and the |
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275 | /// RevGraphAdaptor algorithm class. |
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276 | /// |
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277 | /// And look at the code: |
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278 | /// |
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279 | ///\code |
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280 | /// bool stronglyConnected(const Graph& graph) { |
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281 | /// if (NodeIt(graph) == INVALID) return true; |
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282 | /// Dfs<Graph> dfs(graph); |
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283 | /// dfs.run(NodeIt(graph)); |
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284 | /// for (NodeIt it(graph); it != INVALID; ++it) { |
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285 | /// if (!dfs.reached(it)) { |
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286 | /// return false; |
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287 | /// } |
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288 | /// } |
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289 | /// typedef RevGraphAdaptor<const Graph> RGraph; |
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290 | /// RGraph rgraph(graph); |
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291 | /// DfsVisit<RGraph> rdfs(rgraph); |
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292 | /// rdfs.run(NodeIt(graph)); |
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293 | /// for (NodeIt it(graph); it != INVALID; ++it) { |
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294 | /// if (!rdfs.reached(it)) { |
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295 | /// return false; |
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296 | /// } |
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297 | /// } |
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298 | /// return true; |
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299 | /// } |
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300 | ///\endcode |
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301 | template<typename _Graph> |
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302 | class RevGraphAdaptor : |
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303 | public GraphAdaptorExtender<RevGraphAdaptorBase<_Graph> > { |
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304 | public: |
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305 | typedef _Graph Graph; |
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306 | typedef GraphAdaptorExtender< |
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307 | RevGraphAdaptorBase<_Graph> > Parent; |
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308 | protected: |
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309 | RevGraphAdaptor() { } |
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310 | public: |
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311 | explicit RevGraphAdaptor(_Graph& _graph) { setGraph(_graph); } |
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312 | }; |
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313 | |
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314 | /// \brief Just gives back a reverse graph adaptor |
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315 | /// |
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316 | /// Just gives back a reverse graph adaptor |
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317 | template<typename Graph> |
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318 | RevGraphAdaptor<const Graph> |
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319 | revGraphAdaptor(const Graph& graph) { |
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320 | return RevGraphAdaptor<const Graph>(graph); |
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321 | } |
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322 | |
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323 | template <typename _Graph, typename NodeFilterMap, |
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324 | typename EdgeFilterMap, bool checked = true> |
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325 | class SubGraphAdaptorBase : public GraphAdaptorBase<_Graph> { |
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326 | public: |
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327 | typedef _Graph Graph; |
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328 | typedef SubGraphAdaptorBase Adaptor; |
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329 | typedef GraphAdaptorBase<_Graph> Parent; |
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330 | protected: |
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331 | NodeFilterMap* node_filter_map; |
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332 | EdgeFilterMap* edge_filter_map; |
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333 | SubGraphAdaptorBase() : Parent(), |
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334 | node_filter_map(0), edge_filter_map(0) { } |
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335 | |
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336 | void setNodeFilterMap(NodeFilterMap& _node_filter_map) { |
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337 | node_filter_map=&_node_filter_map; |
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338 | } |
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339 | void setEdgeFilterMap(EdgeFilterMap& _edge_filter_map) { |
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340 | edge_filter_map=&_edge_filter_map; |
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341 | } |
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342 | |
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343 | public: |
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344 | |
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345 | typedef typename Parent::Node Node; |
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346 | typedef typename Parent::Edge Edge; |
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347 | |
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348 | void first(Node& i) const { |
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349 | Parent::first(i); |
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350 | while (i!=INVALID && !(*node_filter_map)[i]) Parent::next(i); |
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351 | } |
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352 | |
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353 | void first(Edge& i) const { |
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354 | Parent::first(i); |
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355 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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356 | || !(*node_filter_map)[Parent::source(i)] |
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357 | || !(*node_filter_map)[Parent::target(i)])) Parent::next(i); |
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358 | } |
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359 | |
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360 | void firstIn(Edge& i, const Node& n) const { |
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361 | Parent::firstIn(i, n); |
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362 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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363 | || !(*node_filter_map)[Parent::source(i)])) Parent::nextIn(i); |
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364 | } |
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365 | |
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366 | void firstOut(Edge& i, const Node& n) const { |
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367 | Parent::firstOut(i, n); |
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368 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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369 | || !(*node_filter_map)[Parent::target(i)])) Parent::nextOut(i); |
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370 | } |
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371 | |
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372 | void next(Node& i) const { |
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373 | Parent::next(i); |
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374 | while (i!=INVALID && !(*node_filter_map)[i]) Parent::next(i); |
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375 | } |
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376 | |
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377 | void next(Edge& i) const { |
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378 | Parent::next(i); |
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379 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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380 | || !(*node_filter_map)[Parent::source(i)] |
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381 | || !(*node_filter_map)[Parent::target(i)])) Parent::next(i); |
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382 | } |
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383 | |
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384 | void nextIn(Edge& i) const { |
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385 | Parent::nextIn(i); |
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386 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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387 | || !(*node_filter_map)[Parent::source(i)])) Parent::nextIn(i); |
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388 | } |
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389 | |
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390 | void nextOut(Edge& i) const { |
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391 | Parent::nextOut(i); |
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392 | while (i!=INVALID && (!(*edge_filter_map)[i] |
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393 | || !(*node_filter_map)[Parent::target(i)])) Parent::nextOut(i); |
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394 | } |
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395 | |
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396 | ///\e |
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397 | |
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398 | /// This function hides \c n in the graph, i.e. the iteration |
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399 | /// jumps over it. This is done by simply setting the value of \c n |
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400 | /// to be false in the corresponding node-map. |
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401 | void hide(const Node& n) const { node_filter_map->set(n, false); } |
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402 | |
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403 | ///\e |
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404 | |
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405 | /// This function hides \c e in the graph, i.e. the iteration |
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406 | /// jumps over it. This is done by simply setting the value of \c e |
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407 | /// to be false in the corresponding edge-map. |
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408 | void hide(const Edge& e) const { edge_filter_map->set(e, false); } |
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409 | |
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410 | ///\e |
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411 | |
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412 | /// The value of \c n is set to be true in the node-map which stores |
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413 | /// hide information. If \c n was hidden previuosly, then it is shown |
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414 | /// again |
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415 | void unHide(const Node& n) const { node_filter_map->set(n, true); } |
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416 | |
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417 | ///\e |
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418 | |
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419 | /// The value of \c e is set to be true in the edge-map which stores |
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420 | /// hide information. If \c e was hidden previuosly, then it is shown |
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421 | /// again |
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422 | void unHide(const Edge& e) const { edge_filter_map->set(e, true); } |
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423 | |
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424 | /// Returns true if \c n is hidden. |
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425 | |
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426 | ///\e |
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427 | /// |
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428 | bool hidden(const Node& n) const { return !(*node_filter_map)[n]; } |
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429 | |
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430 | /// Returns true if \c n is hidden. |
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431 | |
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432 | ///\e |
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433 | /// |
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434 | bool hidden(const Edge& e) const { return !(*edge_filter_map)[e]; } |
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435 | |
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436 | typedef False NodeNumTag; |
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437 | typedef False EdgeNumTag; |
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438 | |
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439 | typedef FindEdgeTagIndicator<Graph> FindEdgeTag; |
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440 | Edge findEdge(const Node& source, const Node& target, |
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441 | const Edge& prev = INVALID) { |
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442 | if (!(*node_filter_map)[source] || !(*node_filter_map)[target]) { |
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443 | return INVALID; |
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444 | } |
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445 | Edge edge = Parent::findEdge(source, target, prev); |
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446 | while (edge != INVALID && !(*edge_filter_map)[edge]) { |
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447 | edge = Parent::findEdge(source, target, edge); |
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448 | } |
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449 | return edge; |
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450 | } |
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451 | |
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452 | template <typename _Value> |
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453 | class NodeMap |
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454 | : public SubMapExtender<Adaptor, |
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455 | typename Parent::template NodeMap<_Value> > |
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456 | { |
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457 | public: |
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458 | typedef Adaptor Graph; |
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459 | typedef SubMapExtender<Adaptor, typename Parent:: |
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460 | template NodeMap<_Value> > Parent; |
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461 | |
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462 | NodeMap(const Graph& g) |
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463 | : Parent(g) {} |
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464 | NodeMap(const Graph& g, const _Value& v) |
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465 | : Parent(g, v) {} |
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466 | |
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467 | NodeMap& operator=(const NodeMap& cmap) { |
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468 | return operator=<NodeMap>(cmap); |
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469 | } |
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470 | |
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471 | template <typename CMap> |
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472 | NodeMap& operator=(const CMap& cmap) { |
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473 | Parent::operator=(cmap); |
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474 | return *this; |
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475 | } |
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476 | }; |
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477 | |
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478 | template <typename _Value> |
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479 | class EdgeMap |
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480 | : public SubMapExtender<Adaptor, |
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481 | typename Parent::template EdgeMap<_Value> > |
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482 | { |
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483 | public: |
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484 | typedef Adaptor Graph; |
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485 | typedef SubMapExtender<Adaptor, typename Parent:: |
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486 | template EdgeMap<_Value> > Parent; |
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487 | |
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488 | EdgeMap(const Graph& g) |
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489 | : Parent(g) {} |
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490 | EdgeMap(const Graph& g, const _Value& v) |
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491 | : Parent(g, v) {} |
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492 | |
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493 | EdgeMap& operator=(const EdgeMap& cmap) { |
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494 | return operator=<EdgeMap>(cmap); |
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495 | } |
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496 | |
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497 | template <typename CMap> |
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498 | EdgeMap& operator=(const CMap& cmap) { |
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499 | Parent::operator=(cmap); |
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500 | return *this; |
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501 | } |
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502 | }; |
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503 | |
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504 | }; |
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505 | |
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506 | template <typename _Graph, typename NodeFilterMap, typename EdgeFilterMap> |
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507 | class SubGraphAdaptorBase<_Graph, NodeFilterMap, EdgeFilterMap, false> |
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508 | : public GraphAdaptorBase<_Graph> { |
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509 | public: |
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510 | typedef _Graph Graph; |
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511 | typedef SubGraphAdaptorBase Adaptor; |
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512 | typedef GraphAdaptorBase<_Graph> Parent; |
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513 | protected: |
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514 | NodeFilterMap* node_filter_map; |
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515 | EdgeFilterMap* edge_filter_map; |
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516 | SubGraphAdaptorBase() : Parent(), |
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517 | node_filter_map(0), edge_filter_map(0) { } |
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518 | |
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519 | void setNodeFilterMap(NodeFilterMap& _node_filter_map) { |
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520 | node_filter_map=&_node_filter_map; |
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521 | } |
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522 | void setEdgeFilterMap(EdgeFilterMap& _edge_filter_map) { |
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523 | edge_filter_map=&_edge_filter_map; |
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524 | } |
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525 | |
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526 | public: |
---|
527 | |
---|
528 | typedef typename Parent::Node Node; |
---|
529 | typedef typename Parent::Edge Edge; |
---|
530 | |
---|
531 | void first(Node& i) const { |
---|
532 | Parent::first(i); |
---|
533 | while (i!=INVALID && !(*node_filter_map)[i]) Parent::next(i); |
---|
534 | } |
---|
535 | |
---|
536 | void first(Edge& i) const { |
---|
537 | Parent::first(i); |
---|
538 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::next(i); |
---|
539 | } |
---|
540 | |
---|
541 | void firstIn(Edge& i, const Node& n) const { |
---|
542 | Parent::firstIn(i, n); |
---|
543 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::nextIn(i); |
---|
544 | } |
---|
545 | |
---|
546 | void firstOut(Edge& i, const Node& n) const { |
---|
547 | Parent::firstOut(i, n); |
---|
548 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::nextOut(i); |
---|
549 | } |
---|
550 | |
---|
551 | void next(Node& i) const { |
---|
552 | Parent::next(i); |
---|
553 | while (i!=INVALID && !(*node_filter_map)[i]) Parent::next(i); |
---|
554 | } |
---|
555 | void next(Edge& i) const { |
---|
556 | Parent::next(i); |
---|
557 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::next(i); |
---|
558 | } |
---|
559 | void nextIn(Edge& i) const { |
---|
560 | Parent::nextIn(i); |
---|
561 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::nextIn(i); |
---|
562 | } |
---|
563 | |
---|
564 | void nextOut(Edge& i) const { |
---|
565 | Parent::nextOut(i); |
---|
566 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::nextOut(i); |
---|
567 | } |
---|
568 | |
---|
569 | ///\e |
---|
570 | |
---|
571 | /// This function hides \c n in the graph, i.e. the iteration |
---|
572 | /// jumps over it. This is done by simply setting the value of \c n |
---|
573 | /// to be false in the corresponding node-map. |
---|
574 | void hide(const Node& n) const { node_filter_map->set(n, false); } |
---|
575 | |
---|
576 | ///\e |
---|
577 | |
---|
578 | /// This function hides \c e in the graph, i.e. the iteration |
---|
579 | /// jumps over it. This is done by simply setting the value of \c e |
---|
580 | /// to be false in the corresponding edge-map. |
---|
581 | void hide(const Edge& e) const { edge_filter_map->set(e, false); } |
---|
582 | |
---|
583 | ///\e |
---|
584 | |
---|
585 | /// The value of \c n is set to be true in the node-map which stores |
---|
586 | /// hide information. If \c n was hidden previuosly, then it is shown |
---|
587 | /// again |
---|
588 | void unHide(const Node& n) const { node_filter_map->set(n, true); } |
---|
589 | |
---|
590 | ///\e |
---|
591 | |
---|
592 | /// The value of \c e is set to be true in the edge-map which stores |
---|
593 | /// hide information. If \c e was hidden previuosly, then it is shown |
---|
594 | /// again |
---|
595 | void unHide(const Edge& e) const { edge_filter_map->set(e, true); } |
---|
596 | |
---|
597 | /// Returns true if \c n is hidden. |
---|
598 | |
---|
599 | ///\e |
---|
600 | /// |
---|
601 | bool hidden(const Node& n) const { return !(*node_filter_map)[n]; } |
---|
602 | |
---|
603 | /// Returns true if \c n is hidden. |
---|
604 | |
---|
605 | ///\e |
---|
606 | /// |
---|
607 | bool hidden(const Edge& e) const { return !(*edge_filter_map)[e]; } |
---|
608 | |
---|
609 | typedef False NodeNumTag; |
---|
610 | typedef False EdgeNumTag; |
---|
611 | |
---|
612 | typedef FindEdgeTagIndicator<Graph> FindEdgeTag; |
---|
613 | Edge findEdge(const Node& source, const Node& target, |
---|
614 | const Edge& prev = INVALID) { |
---|
615 | if (!(*node_filter_map)[source] || !(*node_filter_map)[target]) { |
---|
616 | return INVALID; |
---|
617 | } |
---|
618 | Edge edge = Parent::findEdge(source, target, prev); |
---|
619 | while (edge != INVALID && !(*edge_filter_map)[edge]) { |
---|
620 | edge = Parent::findEdge(source, target, edge); |
---|
621 | } |
---|
622 | return edge; |
---|
623 | } |
---|
624 | |
---|
625 | template <typename _Value> |
---|
626 | class NodeMap |
---|
627 | : public SubMapExtender<Adaptor, |
---|
628 | typename Parent::template NodeMap<_Value> > |
---|
629 | { |
---|
630 | public: |
---|
631 | typedef Adaptor Graph; |
---|
632 | typedef SubMapExtender<Adaptor, typename Parent:: |
---|
633 | template NodeMap<_Value> > Parent; |
---|
634 | |
---|
635 | NodeMap(const Graph& g) |
---|
636 | : Parent(g) {} |
---|
637 | NodeMap(const Graph& g, const _Value& v) |
---|
638 | : Parent(g, v) {} |
---|
639 | |
---|
640 | NodeMap& operator=(const NodeMap& cmap) { |
---|
641 | return operator=<NodeMap>(cmap); |
---|
642 | } |
---|
643 | |
---|
644 | template <typename CMap> |
---|
645 | NodeMap& operator=(const CMap& cmap) { |
---|
646 | Parent::operator=(cmap); |
---|
647 | return *this; |
---|
648 | } |
---|
649 | }; |
---|
650 | |
---|
651 | template <typename _Value> |
---|
652 | class EdgeMap |
---|
653 | : public SubMapExtender<Adaptor, |
---|
654 | typename Parent::template EdgeMap<_Value> > |
---|
655 | { |
---|
656 | public: |
---|
657 | typedef Adaptor Graph; |
---|
658 | typedef SubMapExtender<Adaptor, typename Parent:: |
---|
659 | template EdgeMap<_Value> > Parent; |
---|
660 | |
---|
661 | EdgeMap(const Graph& g) |
---|
662 | : Parent(g) {} |
---|
663 | EdgeMap(const Graph& g, const _Value& v) |
---|
664 | : Parent(g, v) {} |
---|
665 | |
---|
666 | EdgeMap& operator=(const EdgeMap& cmap) { |
---|
667 | return operator=<EdgeMap>(cmap); |
---|
668 | } |
---|
669 | |
---|
670 | template <typename CMap> |
---|
671 | EdgeMap& operator=(const CMap& cmap) { |
---|
672 | Parent::operator=(cmap); |
---|
673 | return *this; |
---|
674 | } |
---|
675 | }; |
---|
676 | |
---|
677 | }; |
---|
678 | |
---|
679 | /// \ingroup graph_adaptors |
---|
680 | /// |
---|
681 | /// \brief A graph adaptor for hiding nodes and edges from a graph. |
---|
682 | /// |
---|
683 | /// SubGraphAdaptor shows the graph with filtered node-set and |
---|
684 | /// edge-set. If the \c checked parameter is true then it filters the edgeset |
---|
685 | /// to do not get invalid edges without source or target. |
---|
686 | /// Let \f$ G=(V, A) \f$ be a directed graph |
---|
687 | /// and suppose that the graph instance \c g of type ListGraph |
---|
688 | /// implements \f$ G \f$. |
---|
689 | /// Let moreover \f$ b_V \f$ and \f$ b_A \f$ be bool-valued functions resp. |
---|
690 | /// on the node-set and edge-set. |
---|
691 | /// SubGraphAdaptor<...>::NodeIt iterates |
---|
692 | /// on the node-set \f$ \{v\in V : b_V(v)=true\} \f$ and |
---|
693 | /// SubGraphAdaptor<...>::EdgeIt iterates |
---|
694 | /// on the edge-set \f$ \{e\in A : b_A(e)=true\} \f$. Similarly, |
---|
695 | /// SubGraphAdaptor<...>::OutEdgeIt and |
---|
696 | /// SubGraphAdaptor<...>::InEdgeIt iterates |
---|
697 | /// only on edges leaving and entering a specific node which have true value. |
---|
698 | /// |
---|
699 | /// If the \c checked template parameter is false then we have to note that |
---|
700 | /// the node-iterator cares only the filter on the node-set, and the |
---|
701 | /// edge-iterator cares only the filter on the edge-set. |
---|
702 | /// This way the edge-map |
---|
703 | /// should filter all edges which's source or target is filtered by the |
---|
704 | /// node-filter. |
---|
705 | ///\code |
---|
706 | /// typedef ListGraph Graph; |
---|
707 | /// Graph g; |
---|
708 | /// typedef Graph::Node Node; |
---|
709 | /// typedef Graph::Edge Edge; |
---|
710 | /// Node u=g.addNode(); //node of id 0 |
---|
711 | /// Node v=g.addNode(); //node of id 1 |
---|
712 | /// Node e=g.addEdge(u, v); //edge of id 0 |
---|
713 | /// Node f=g.addEdge(v, u); //edge of id 1 |
---|
714 | /// Graph::NodeMap<bool> nm(g, true); |
---|
715 | /// nm.set(u, false); |
---|
716 | /// Graph::EdgeMap<bool> em(g, true); |
---|
717 | /// em.set(e, false); |
---|
718 | /// typedef SubGraphAdaptor<Graph, Graph::NodeMap<bool>, Graph::EdgeMap<bool> > SubGA; |
---|
719 | /// SubGA ga(g, nm, em); |
---|
720 | /// for (SubGA::NodeIt n(ga); n!=INVALID; ++n) std::cout << g.id(n) << std::endl; |
---|
721 | /// std::cout << ":-)" << std::endl; |
---|
722 | /// for (SubGA::EdgeIt e(ga); e!=INVALID; ++e) std::cout << g.id(e) << std::endl; |
---|
723 | ///\endcode |
---|
724 | /// The output of the above code is the following. |
---|
725 | ///\code |
---|
726 | /// 1 |
---|
727 | /// :-) |
---|
728 | /// 1 |
---|
729 | ///\endcode |
---|
730 | /// Note that \c n is of type \c SubGA::NodeIt, but it can be converted to |
---|
731 | /// \c Graph::Node that is why \c g.id(n) can be applied. |
---|
732 | /// |
---|
733 | /// For other examples see also the documentation of NodeSubGraphAdaptor and |
---|
734 | /// EdgeSubGraphAdaptor. |
---|
735 | /// |
---|
736 | /// \author Marton Makai |
---|
737 | |
---|
738 | template<typename _Graph, typename NodeFilterMap, |
---|
739 | typename EdgeFilterMap, bool checked = true> |
---|
740 | class SubGraphAdaptor : |
---|
741 | public GraphAdaptorExtender< |
---|
742 | SubGraphAdaptorBase<_Graph, NodeFilterMap, EdgeFilterMap, checked> > { |
---|
743 | public: |
---|
744 | typedef _Graph Graph; |
---|
745 | typedef GraphAdaptorExtender< SubGraphAdaptorBase<_Graph, NodeFilterMap, |
---|
746 | EdgeFilterMap, checked> > |
---|
747 | Parent; |
---|
748 | |
---|
749 | protected: |
---|
750 | SubGraphAdaptor() { } |
---|
751 | public: |
---|
752 | |
---|
753 | SubGraphAdaptor(_Graph& _graph, NodeFilterMap& _node_filter_map, |
---|
754 | EdgeFilterMap& _edge_filter_map) { |
---|
755 | setGraph(_graph); |
---|
756 | setNodeFilterMap(_node_filter_map); |
---|
757 | setEdgeFilterMap(_edge_filter_map); |
---|
758 | } |
---|
759 | |
---|
760 | }; |
---|
761 | |
---|
762 | /// \brief Just gives back a sub graph adaptor |
---|
763 | /// |
---|
764 | /// Just gives back a sub graph adaptor |
---|
765 | template<typename Graph, typename NodeFilterMap, typename EdgeFilterMap> |
---|
766 | SubGraphAdaptor<const Graph, NodeFilterMap, EdgeFilterMap> |
---|
767 | subGraphAdaptor(const Graph& graph, |
---|
768 | NodeFilterMap& nfm, EdgeFilterMap& efm) { |
---|
769 | return SubGraphAdaptor<const Graph, NodeFilterMap, EdgeFilterMap> |
---|
770 | (graph, nfm, efm); |
---|
771 | } |
---|
772 | |
---|
773 | template<typename Graph, typename NodeFilterMap, typename EdgeFilterMap> |
---|
774 | SubGraphAdaptor<const Graph, const NodeFilterMap, EdgeFilterMap> |
---|
775 | subGraphAdaptor(const Graph& graph, |
---|
776 | NodeFilterMap& nfm, EdgeFilterMap& efm) { |
---|
777 | return SubGraphAdaptor<const Graph, const NodeFilterMap, EdgeFilterMap> |
---|
778 | (graph, nfm, efm); |
---|
779 | } |
---|
780 | |
---|
781 | template<typename Graph, typename NodeFilterMap, typename EdgeFilterMap> |
---|
782 | SubGraphAdaptor<const Graph, NodeFilterMap, const EdgeFilterMap> |
---|
783 | subGraphAdaptor(const Graph& graph, |
---|
784 | NodeFilterMap& nfm, EdgeFilterMap& efm) { |
---|
785 | return SubGraphAdaptor<const Graph, NodeFilterMap, const EdgeFilterMap> |
---|
786 | (graph, nfm, efm); |
---|
787 | } |
---|
788 | |
---|
789 | template<typename Graph, typename NodeFilterMap, typename EdgeFilterMap> |
---|
790 | SubGraphAdaptor<const Graph, const NodeFilterMap, const EdgeFilterMap> |
---|
791 | subGraphAdaptor(const Graph& graph, |
---|
792 | NodeFilterMap& nfm, EdgeFilterMap& efm) { |
---|
793 | return SubGraphAdaptor<const Graph, const NodeFilterMap, |
---|
794 | const EdgeFilterMap>(graph, nfm, efm); |
---|
795 | } |
---|
796 | |
---|
797 | |
---|
798 | |
---|
799 | ///\ingroup graph_adaptors |
---|
800 | /// |
---|
801 | ///\brief An adaptor for hiding nodes from a graph. |
---|
802 | /// |
---|
803 | ///An adaptor for hiding nodes from a graph. |
---|
804 | ///This adaptor specializes SubGraphAdaptor in the way that only |
---|
805 | ///the node-set |
---|
806 | ///can be filtered. In usual case the checked parameter is true, we get the |
---|
807 | ///induced subgraph. But if the checked parameter is false then we can |
---|
808 | ///filter only isolated nodes. |
---|
809 | ///\author Marton Makai |
---|
810 | template<typename Graph, typename NodeFilterMap, bool checked = true> |
---|
811 | class NodeSubGraphAdaptor : |
---|
812 | public SubGraphAdaptor<Graph, NodeFilterMap, |
---|
813 | ConstMap<typename Graph::Edge,bool>, checked> { |
---|
814 | public: |
---|
815 | |
---|
816 | typedef SubGraphAdaptor<Graph, NodeFilterMap, |
---|
817 | ConstMap<typename Graph::Edge,bool>, checked > |
---|
818 | Parent; |
---|
819 | |
---|
820 | protected: |
---|
821 | ConstMap<typename Graph::Edge, bool> const_true_map; |
---|
822 | |
---|
823 | NodeSubGraphAdaptor() : const_true_map(true) { |
---|
824 | Parent::setEdgeFilterMap(const_true_map); |
---|
825 | } |
---|
826 | |
---|
827 | public: |
---|
828 | |
---|
829 | NodeSubGraphAdaptor(Graph& _graph, NodeFilterMap& _node_filter_map) : |
---|
830 | Parent(), const_true_map(true) { |
---|
831 | Parent::setGraph(_graph); |
---|
832 | Parent::setNodeFilterMap(_node_filter_map); |
---|
833 | Parent::setEdgeFilterMap(const_true_map); |
---|
834 | } |
---|
835 | |
---|
836 | }; |
---|
837 | |
---|
838 | |
---|
839 | /// \brief Just gives back a node sub graph adaptor |
---|
840 | /// |
---|
841 | /// Just gives back a node sub graph adaptor |
---|
842 | template<typename Graph, typename NodeFilterMap> |
---|
843 | NodeSubGraphAdaptor<const Graph, NodeFilterMap> |
---|
844 | nodeSubGraphAdaptor(const Graph& graph, NodeFilterMap& nfm) { |
---|
845 | return NodeSubGraphAdaptor<const Graph, NodeFilterMap>(graph, nfm); |
---|
846 | } |
---|
847 | |
---|
848 | template<typename Graph, typename NodeFilterMap> |
---|
849 | NodeSubGraphAdaptor<const Graph, const NodeFilterMap> |
---|
850 | nodeSubGraphAdaptor(const Graph& graph, const NodeFilterMap& nfm) { |
---|
851 | return NodeSubGraphAdaptor<const Graph, const NodeFilterMap>(graph, nfm); |
---|
852 | } |
---|
853 | |
---|
854 | ///\ingroup graph_adaptors |
---|
855 | /// |
---|
856 | ///\brief An adaptor for hiding edges from a graph. |
---|
857 | /// |
---|
858 | ///An adaptor for hiding edges from a graph. |
---|
859 | ///This adaptor specializes SubGraphAdaptor in the way that |
---|
860 | ///only the edge-set |
---|
861 | ///can be filtered. The usefulness of this adaptor is demonstrated in the |
---|
862 | ///problem of searching a maximum number of edge-disjoint shortest paths |
---|
863 | ///between |
---|
864 | ///two nodes \c s and \c t. Shortest here means being shortest w.r.t. |
---|
865 | ///non-negative edge-lengths. Note that |
---|
866 | ///the comprehension of the presented solution |
---|
867 | ///need's some elementary knowledge from combinatorial optimization. |
---|
868 | /// |
---|
869 | ///If a single shortest path is to be |
---|
870 | ///searched between \c s and \c t, then this can be done easily by |
---|
871 | ///applying the Dijkstra algorithm. What happens, if a maximum number of |
---|
872 | ///edge-disjoint shortest paths is to be computed. It can be proved that an |
---|
873 | ///edge can be in a shortest path if and only |
---|
874 | ///if it is tight with respect to |
---|
875 | ///the potential function computed by Dijkstra. |
---|
876 | ///Moreover, any path containing |
---|
877 | ///only such edges is a shortest one. |
---|
878 | ///Thus we have to compute a maximum number |
---|
879 | ///of edge-disjoint paths between \c s and \c t in |
---|
880 | ///the graph which has edge-set |
---|
881 | ///all the tight edges. The computation will be demonstrated |
---|
882 | ///on the following |
---|
883 | ///graph, which is read from the dimacs file \c sub_graph_adaptor_demo.dim. |
---|
884 | ///The full source code is available in \ref sub_graph_adaptor_demo.cc. |
---|
885 | ///If you are interested in more demo programs, you can use |
---|
886 | ///\ref dim_to_dot.cc to generate .dot files from dimacs files. |
---|
887 | ///The .dot file of the following figure was generated by |
---|
888 | ///the demo program \ref dim_to_dot.cc. |
---|
889 | /// |
---|
890 | ///\dot |
---|
891 | ///digraph lemon_dot_example { |
---|
892 | ///node [ shape=ellipse, fontname=Helvetica, fontsize=10 ]; |
---|
893 | ///n0 [ label="0 (s)" ]; |
---|
894 | ///n1 [ label="1" ]; |
---|
895 | ///n2 [ label="2" ]; |
---|
896 | ///n3 [ label="3" ]; |
---|
897 | ///n4 [ label="4" ]; |
---|
898 | ///n5 [ label="5" ]; |
---|
899 | ///n6 [ label="6 (t)" ]; |
---|
900 | ///edge [ shape=ellipse, fontname=Helvetica, fontsize=10 ]; |
---|
901 | ///n5 -> n6 [ label="9, length:4" ]; |
---|
902 | ///n4 -> n6 [ label="8, length:2" ]; |
---|
903 | ///n3 -> n5 [ label="7, length:1" ]; |
---|
904 | ///n2 -> n5 [ label="6, length:3" ]; |
---|
905 | ///n2 -> n6 [ label="5, length:5" ]; |
---|
906 | ///n2 -> n4 [ label="4, length:2" ]; |
---|
907 | ///n1 -> n4 [ label="3, length:3" ]; |
---|
908 | ///n0 -> n3 [ label="2, length:1" ]; |
---|
909 | ///n0 -> n2 [ label="1, length:2" ]; |
---|
910 | ///n0 -> n1 [ label="0, length:3" ]; |
---|
911 | ///} |
---|
912 | ///\enddot |
---|
913 | /// |
---|
914 | ///\code |
---|
915 | ///Graph g; |
---|
916 | ///Node s, t; |
---|
917 | ///LengthMap length(g); |
---|
918 | /// |
---|
919 | ///readDimacs(std::cin, g, length, s, t); |
---|
920 | /// |
---|
921 | ///cout << "edges with lengths (of form id, source--length->target): " << endl; |
---|
922 | ///for(EdgeIt e(g); e!=INVALID; ++e) |
---|
923 | /// cout << g.id(e) << ", " << g.id(g.source(e)) << "--" |
---|
924 | /// << length[e] << "->" << g.id(g.target(e)) << endl; |
---|
925 | /// |
---|
926 | ///cout << "s: " << g.id(s) << " t: " << g.id(t) << endl; |
---|
927 | ///\endcode |
---|
928 | ///Next, the potential function is computed with Dijkstra. |
---|
929 | ///\code |
---|
930 | ///typedef Dijkstra<Graph, LengthMap> Dijkstra; |
---|
931 | ///Dijkstra dijkstra(g, length); |
---|
932 | ///dijkstra.run(s); |
---|
933 | ///\endcode |
---|
934 | ///Next, we consrtruct a map which filters the edge-set to the tight edges. |
---|
935 | ///\code |
---|
936 | ///typedef TightEdgeFilterMap<Graph, const Dijkstra::DistMap, LengthMap> |
---|
937 | /// TightEdgeFilter; |
---|
938 | ///TightEdgeFilter tight_edge_filter(g, dijkstra.distMap(), length); |
---|
939 | /// |
---|
940 | ///typedef EdgeSubGraphAdaptor<Graph, TightEdgeFilter> SubGA; |
---|
941 | ///SubGA ga(g, tight_edge_filter); |
---|
942 | ///\endcode |
---|
943 | ///Then, the maximum nimber of edge-disjoint \c s-\c t paths are computed |
---|
944 | ///with a max flow algorithm Preflow. |
---|
945 | ///\code |
---|
946 | ///ConstMap<Edge, int> const_1_map(1); |
---|
947 | ///Graph::EdgeMap<int> flow(g, 0); |
---|
948 | /// |
---|
949 | ///Preflow<SubGA, ConstMap<Edge, int>, Graph::EdgeMap<int> > |
---|
950 | /// preflow(ga, const_1_map, s, t); |
---|
951 | ///preflow.run(); |
---|
952 | ///\endcode |
---|
953 | ///Last, the output is: |
---|
954 | ///\code |
---|
955 | ///cout << "maximum number of edge-disjoint shortest path: " |
---|
956 | /// << preflow.flowValue() << endl; |
---|
957 | ///cout << "edges of the maximum number of edge-disjoint shortest s-t paths: " |
---|
958 | /// << endl; |
---|
959 | ///for(EdgeIt e(g); e!=INVALID; ++e) |
---|
960 | /// if (preflow.flow(e)) |
---|
961 | /// cout << " " << g.id(g.source(e)) << "--" |
---|
962 | /// << length[e] << "->" << g.id(g.target(e)) << endl; |
---|
963 | ///\endcode |
---|
964 | ///The program has the following (expected :-)) output: |
---|
965 | ///\code |
---|
966 | ///edges with lengths (of form id, source--length->target): |
---|
967 | /// 9, 5--4->6 |
---|
968 | /// 8, 4--2->6 |
---|
969 | /// 7, 3--1->5 |
---|
970 | /// 6, 2--3->5 |
---|
971 | /// 5, 2--5->6 |
---|
972 | /// 4, 2--2->4 |
---|
973 | /// 3, 1--3->4 |
---|
974 | /// 2, 0--1->3 |
---|
975 | /// 1, 0--2->2 |
---|
976 | /// 0, 0--3->1 |
---|
977 | ///s: 0 t: 6 |
---|
978 | ///maximum number of edge-disjoint shortest path: 2 |
---|
979 | ///edges of the maximum number of edge-disjoint shortest s-t paths: |
---|
980 | /// 9, 5--4->6 |
---|
981 | /// 8, 4--2->6 |
---|
982 | /// 7, 3--1->5 |
---|
983 | /// 4, 2--2->4 |
---|
984 | /// 2, 0--1->3 |
---|
985 | /// 1, 0--2->2 |
---|
986 | ///\endcode |
---|
987 | /// |
---|
988 | ///\author Marton Makai |
---|
989 | template<typename Graph, typename EdgeFilterMap> |
---|
990 | class EdgeSubGraphAdaptor : |
---|
991 | public SubGraphAdaptor<Graph, ConstMap<typename Graph::Node,bool>, |
---|
992 | EdgeFilterMap, false> { |
---|
993 | public: |
---|
994 | typedef SubGraphAdaptor<Graph, ConstMap<typename Graph::Node,bool>, |
---|
995 | EdgeFilterMap, false> Parent; |
---|
996 | protected: |
---|
997 | ConstMap<typename Graph::Node, bool> const_true_map; |
---|
998 | |
---|
999 | EdgeSubGraphAdaptor() : const_true_map(true) { |
---|
1000 | Parent::setNodeFilterMap(const_true_map); |
---|
1001 | } |
---|
1002 | |
---|
1003 | public: |
---|
1004 | |
---|
1005 | EdgeSubGraphAdaptor(Graph& _graph, EdgeFilterMap& _edge_filter_map) : |
---|
1006 | Parent(), const_true_map(true) { |
---|
1007 | Parent::setGraph(_graph); |
---|
1008 | Parent::setNodeFilterMap(const_true_map); |
---|
1009 | Parent::setEdgeFilterMap(_edge_filter_map); |
---|
1010 | } |
---|
1011 | |
---|
1012 | }; |
---|
1013 | |
---|
1014 | /// \brief Just gives back an edge sub graph adaptor |
---|
1015 | /// |
---|
1016 | /// Just gives back an edge sub graph adaptor |
---|
1017 | template<typename Graph, typename EdgeFilterMap> |
---|
1018 | EdgeSubGraphAdaptor<const Graph, EdgeFilterMap> |
---|
1019 | edgeSubGraphAdaptor(const Graph& graph, EdgeFilterMap& efm) { |
---|
1020 | return EdgeSubGraphAdaptor<const Graph, EdgeFilterMap>(graph, efm); |
---|
1021 | } |
---|
1022 | |
---|
1023 | template<typename Graph, typename EdgeFilterMap> |
---|
1024 | EdgeSubGraphAdaptor<const Graph, const EdgeFilterMap> |
---|
1025 | edgeSubGraphAdaptor(const Graph& graph, const EdgeFilterMap& efm) { |
---|
1026 | return EdgeSubGraphAdaptor<const Graph, const EdgeFilterMap>(graph, efm); |
---|
1027 | } |
---|
1028 | |
---|
1029 | template <typename _Graph> |
---|
1030 | class UndirGraphAdaptorBase : |
---|
1031 | public UndirGraphExtender<GraphAdaptorBase<_Graph> > { |
---|
1032 | public: |
---|
1033 | typedef _Graph Graph; |
---|
1034 | typedef UndirGraphAdaptorBase Adaptor; |
---|
1035 | typedef UndirGraphExtender<GraphAdaptorBase<_Graph> > Parent; |
---|
1036 | |
---|
1037 | protected: |
---|
1038 | |
---|
1039 | UndirGraphAdaptorBase() : Parent() {} |
---|
1040 | |
---|
1041 | public: |
---|
1042 | |
---|
1043 | typedef typename Parent::UEdge UEdge; |
---|
1044 | typedef typename Parent::Edge Edge; |
---|
1045 | |
---|
1046 | private: |
---|
1047 | |
---|
1048 | template <typename _Value> |
---|
1049 | class EdgeMapBase { |
---|
1050 | private: |
---|
1051 | |
---|
1052 | typedef typename _Graph::template EdgeMap<_Value> MapImpl; |
---|
1053 | |
---|
1054 | public: |
---|
1055 | |
---|
1056 | typedef typename MapTraits<MapImpl>::ReferenceMapTag ReferenceMapTag; |
---|
1057 | |
---|
1058 | typedef _Value Value; |
---|
1059 | typedef Edge Key; |
---|
1060 | |
---|
1061 | EdgeMapBase(const Adaptor& adaptor) : |
---|
1062 | forward_map(*adaptor.graph), backward_map(*adaptor.graph) {} |
---|
1063 | |
---|
1064 | EdgeMapBase(const Adaptor& adaptor, const Value& v) |
---|
1065 | : forward_map(*adaptor.graph, v), backward_map(*adaptor.graph, v) {} |
---|
1066 | |
---|
1067 | void set(const Edge& e, const Value& a) { |
---|
1068 | if (Parent::direction(e)) { |
---|
1069 | forward_map.set(e, a); |
---|
1070 | } else { |
---|
1071 | backward_map.set(e, a); |
---|
1072 | } |
---|
1073 | } |
---|
1074 | |
---|
1075 | typename MapTraits<MapImpl>::ConstReturnValue operator[](Edge e) const { |
---|
1076 | if (Parent::direction(e)) { |
---|
1077 | return forward_map[e]; |
---|
1078 | } else { |
---|
1079 | return backward_map[e]; |
---|
1080 | } |
---|
1081 | } |
---|
1082 | |
---|
1083 | typename MapTraits<MapImpl>::ReturnValue operator[](Edge e) { |
---|
1084 | if (Parent::direction(e)) { |
---|
1085 | return forward_map[e]; |
---|
1086 | } else { |
---|
1087 | return backward_map[e]; |
---|
1088 | } |
---|
1089 | } |
---|
1090 | |
---|
1091 | protected: |
---|
1092 | |
---|
1093 | MapImpl forward_map, backward_map; |
---|
1094 | |
---|
1095 | }; |
---|
1096 | |
---|
1097 | public: |
---|
1098 | |
---|
1099 | template <typename _Value> |
---|
1100 | class EdgeMap |
---|
1101 | : public SubMapExtender<Adaptor, EdgeMapBase<_Value> > |
---|
1102 | { |
---|
1103 | public: |
---|
1104 | typedef Adaptor Graph; |
---|
1105 | typedef SubMapExtender<Adaptor, EdgeMapBase<_Value> > Parent; |
---|
1106 | |
---|
1107 | EdgeMap(const Graph& g) |
---|
1108 | : Parent(g) {} |
---|
1109 | EdgeMap(const Graph& g, const _Value& v) |
---|
1110 | : Parent(g, v) {} |
---|
1111 | |
---|
1112 | EdgeMap& operator=(const EdgeMap& cmap) { |
---|
1113 | return operator=<EdgeMap>(cmap); |
---|
1114 | } |
---|
1115 | |
---|
1116 | template <typename CMap> |
---|
1117 | EdgeMap& operator=(const CMap& cmap) { |
---|
1118 | Parent::operator=(cmap); |
---|
1119 | return *this; |
---|
1120 | } |
---|
1121 | }; |
---|
1122 | |
---|
1123 | template <typename _Value> |
---|
1124 | class UEdgeMap : public Graph::template EdgeMap<_Value> { |
---|
1125 | public: |
---|
1126 | |
---|
1127 | typedef typename Graph::template EdgeMap<_Value> Parent; |
---|
1128 | |
---|
1129 | explicit UEdgeMap(const Adaptor& ga) |
---|
1130 | : Parent(*ga.graph) {} |
---|
1131 | |
---|
1132 | UEdgeMap(const Adaptor& ga, const _Value& value) |
---|
1133 | : Parent(*ga.graph, value) {} |
---|
1134 | |
---|
1135 | UEdgeMap& operator=(const UEdgeMap& cmap) { |
---|
1136 | return operator=<UEdgeMap>(cmap); |
---|
1137 | } |
---|
1138 | |
---|
1139 | template <typename CMap> |
---|
1140 | UEdgeMap& operator=(const CMap& cmap) { |
---|
1141 | Parent::operator=(cmap); |
---|
1142 | return *this; |
---|
1143 | } |
---|
1144 | |
---|
1145 | }; |
---|
1146 | |
---|
1147 | }; |
---|
1148 | |
---|
1149 | template <typename _Graph, typename Enable = void> |
---|
1150 | class AlterableUndirGraphAdaptor |
---|
1151 | : public UGraphAdaptorExtender<UndirGraphAdaptorBase<_Graph> > { |
---|
1152 | public: |
---|
1153 | typedef UGraphAdaptorExtender<UndirGraphAdaptorBase<_Graph> > Parent; |
---|
1154 | |
---|
1155 | protected: |
---|
1156 | |
---|
1157 | AlterableUndirGraphAdaptor() : Parent() {} |
---|
1158 | |
---|
1159 | public: |
---|
1160 | |
---|
1161 | typedef typename Parent::EdgeNotifier UEdgeNotifier; |
---|
1162 | typedef InvalidType EdgeNotifier; |
---|
1163 | |
---|
1164 | }; |
---|
1165 | |
---|
1166 | template <typename _Graph> |
---|
1167 | class AlterableUndirGraphAdaptor< |
---|
1168 | _Graph, |
---|
1169 | typename enable_if<typename _Graph::EdgeNotifier::Notifier>::type > |
---|
1170 | : public UGraphAdaptorExtender<UndirGraphAdaptorBase<_Graph> > { |
---|
1171 | public: |
---|
1172 | |
---|
1173 | typedef UGraphAdaptorExtender<UndirGraphAdaptorBase<_Graph> > Parent; |
---|
1174 | typedef _Graph Graph; |
---|
1175 | typedef typename _Graph::Edge GraphEdge; |
---|
1176 | |
---|
1177 | protected: |
---|
1178 | |
---|
1179 | AlterableUndirGraphAdaptor() |
---|
1180 | : Parent(), edge_notifier(*this), edge_notifier_proxy(*this) {} |
---|
1181 | |
---|
1182 | void setGraph(_Graph& g) { |
---|
1183 | Parent::setGraph(g); |
---|
1184 | edge_notifier_proxy.setNotifier(g.notifier(GraphEdge())); |
---|
1185 | } |
---|
1186 | |
---|
1187 | public: |
---|
1188 | |
---|
1189 | ~AlterableUndirGraphAdaptor() { |
---|
1190 | edge_notifier.clear(); |
---|
1191 | } |
---|
1192 | |
---|
1193 | typedef typename Parent::UEdge UEdge; |
---|
1194 | typedef typename Parent::Edge Edge; |
---|
1195 | |
---|
1196 | typedef typename Parent::EdgeNotifier UEdgeNotifier; |
---|
1197 | |
---|
1198 | using Parent::notifier; |
---|
1199 | |
---|
1200 | typedef AlterationNotifier<AlterableUndirGraphAdaptor, |
---|
1201 | Edge> EdgeNotifier; |
---|
1202 | EdgeNotifier& notifier(Edge) const { return edge_notifier; } |
---|
1203 | |
---|
1204 | protected: |
---|
1205 | |
---|
1206 | class NotifierProxy : public Graph::EdgeNotifier::ObserverBase { |
---|
1207 | public: |
---|
1208 | |
---|
1209 | typedef typename Graph::EdgeNotifier::ObserverBase Parent; |
---|
1210 | typedef AlterableUndirGraphAdaptor AdaptorBase; |
---|
1211 | |
---|
1212 | NotifierProxy(const AdaptorBase& _adaptor) |
---|
1213 | : Parent(), adaptor(&_adaptor) { |
---|
1214 | } |
---|
1215 | |
---|
1216 | virtual ~NotifierProxy() { |
---|
1217 | if (Parent::attached()) { |
---|
1218 | Parent::detach(); |
---|
1219 | } |
---|
1220 | } |
---|
1221 | |
---|
1222 | void setNotifier(typename Graph::EdgeNotifier& nf) { |
---|
1223 | Parent::attach(nf); |
---|
1224 | } |
---|
1225 | |
---|
1226 | |
---|
1227 | protected: |
---|
1228 | |
---|
1229 | virtual void add(const GraphEdge& ge) { |
---|
1230 | std::vector<Edge> edges; |
---|
1231 | edges.push_back(AdaptorBase::Parent::direct(ge, true)); |
---|
1232 | edges.push_back(AdaptorBase::Parent::direct(ge, false)); |
---|
1233 | adaptor->notifier(Edge()).add(edges); |
---|
1234 | } |
---|
1235 | virtual void add(const std::vector<GraphEdge>& ge) { |
---|
1236 | std::vector<Edge> edges; |
---|
1237 | for (int i = 0; i < int(ge.size()); ++i) { |
---|
1238 | edges.push_back(AdaptorBase::Parent::direct(ge[i], true)); |
---|
1239 | edges.push_back(AdaptorBase::Parent::direct(ge[i], false)); |
---|
1240 | } |
---|
1241 | adaptor->notifier(Edge()).add(edges); |
---|
1242 | } |
---|
1243 | virtual void erase(const GraphEdge& ge) { |
---|
1244 | std::vector<Edge> edges; |
---|
1245 | edges.push_back(AdaptorBase::Parent::direct(ge, true)); |
---|
1246 | edges.push_back(AdaptorBase::Parent::direct(ge, false)); |
---|
1247 | adaptor->notifier(Edge()).erase(edges); |
---|
1248 | } |
---|
1249 | virtual void erase(const std::vector<GraphEdge>& ge) { |
---|
1250 | std::vector<Edge> edges; |
---|
1251 | for (int i = 0; i < int(ge.size()); ++i) { |
---|
1252 | edges.push_back(AdaptorBase::Parent::direct(ge[i], true)); |
---|
1253 | edges.push_back(AdaptorBase::Parent::direct(ge[i], false)); |
---|
1254 | } |
---|
1255 | adaptor->notifier(Edge()).erase(edges); |
---|
1256 | } |
---|
1257 | virtual void build() { |
---|
1258 | adaptor->notifier(Edge()).build(); |
---|
1259 | } |
---|
1260 | virtual void clear() { |
---|
1261 | adaptor->notifier(Edge()).clear(); |
---|
1262 | } |
---|
1263 | |
---|
1264 | const AdaptorBase* adaptor; |
---|
1265 | }; |
---|
1266 | |
---|
1267 | |
---|
1268 | mutable EdgeNotifier edge_notifier; |
---|
1269 | NotifierProxy edge_notifier_proxy; |
---|
1270 | |
---|
1271 | }; |
---|
1272 | |
---|
1273 | |
---|
1274 | ///\ingroup graph_adaptors |
---|
1275 | /// |
---|
1276 | /// \brief An undirected graph is made from a directed graph by an adaptor |
---|
1277 | /// |
---|
1278 | /// This adaptor makes an undirected graph from a directed |
---|
1279 | /// graph. All edge of the underlying will be showed in the adaptor |
---|
1280 | /// as an undirected edge. Let's see an informal example about using |
---|
1281 | /// this adaptor: |
---|
1282 | /// |
---|
1283 | /// There is a network of the streets of a town. Of course there are |
---|
1284 | /// some one-way street in the town hence the network is a directed |
---|
1285 | /// one. There is a crazy driver who go oppositely in the one-way |
---|
1286 | /// street without moral sense. Of course he can pass this streets |
---|
1287 | /// slower than the regular way, in fact his speed is half of the |
---|
1288 | /// normal speed. How long should he drive to get from a source |
---|
1289 | /// point to the target? Let see the example code which calculate it: |
---|
1290 | /// |
---|
1291 | ///\code |
---|
1292 | /// typedef UndirGraphAdaptor<Graph> UGraph; |
---|
1293 | /// UGraph ugraph(graph); |
---|
1294 | /// |
---|
1295 | /// typedef SimpleMap<LengthMap> FLengthMap; |
---|
1296 | /// FLengthMap flength(length); |
---|
1297 | /// |
---|
1298 | /// typedef ScaleMap<LengthMap> RLengthMap; |
---|
1299 | /// RLengthMap rlength(length, 2.0); |
---|
1300 | /// |
---|
1301 | /// typedef UGraph::CombinedEdgeMap<FLengthMap, RLengthMap > ULengthMap; |
---|
1302 | /// ULengthMap ulength(flength, rlength); |
---|
1303 | /// |
---|
1304 | /// Dijkstra<UGraph, ULengthMap> dijkstra(ugraph, ulength); |
---|
1305 | /// std::cout << "Driving time : " << dijkstra.run(src, trg) << std::endl; |
---|
1306 | ///\endcode |
---|
1307 | /// |
---|
1308 | /// The combined edge map makes the length map for the undirected |
---|
1309 | /// graph. It is created from a forward and reverse map. The forward |
---|
1310 | /// map is created from the original length map with a SimpleMap |
---|
1311 | /// adaptor which just makes a read-write map from the reference map |
---|
1312 | /// i.e. it forgets that it can be return reference to values. The |
---|
1313 | /// reverse map is just the scaled original map with the ScaleMap |
---|
1314 | /// adaptor. The combination solves that passing the reverse way |
---|
1315 | /// takes double time than the original. To get the driving time we |
---|
1316 | /// run the dijkstra algorithm on the undirected graph. |
---|
1317 | /// |
---|
1318 | /// \author Marton Makai and Balazs Dezso |
---|
1319 | template<typename _Graph> |
---|
1320 | class UndirGraphAdaptor : public AlterableUndirGraphAdaptor<_Graph> { |
---|
1321 | public: |
---|
1322 | typedef _Graph Graph; |
---|
1323 | typedef AlterableUndirGraphAdaptor<_Graph> Parent; |
---|
1324 | protected: |
---|
1325 | UndirGraphAdaptor() { } |
---|
1326 | public: |
---|
1327 | |
---|
1328 | /// \brief Constructor |
---|
1329 | /// |
---|
1330 | /// Constructor |
---|
1331 | UndirGraphAdaptor(_Graph& _graph) { |
---|
1332 | setGraph(_graph); |
---|
1333 | } |
---|
1334 | |
---|
1335 | /// \brief EdgeMap combined from two original EdgeMap |
---|
1336 | /// |
---|
1337 | /// This class adapts two original graph EdgeMap to |
---|
1338 | /// get an edge map on the adaptor. |
---|
1339 | template <typename _ForwardMap, typename _BackwardMap> |
---|
1340 | class CombinedEdgeMap { |
---|
1341 | public: |
---|
1342 | |
---|
1343 | typedef _ForwardMap ForwardMap; |
---|
1344 | typedef _BackwardMap BackwardMap; |
---|
1345 | |
---|
1346 | typedef typename MapTraits<ForwardMap>::ReferenceMapTag ReferenceMapTag; |
---|
1347 | |
---|
1348 | typedef typename ForwardMap::Value Value; |
---|
1349 | typedef typename Parent::Edge Key; |
---|
1350 | |
---|
1351 | /// \brief Constructor |
---|
1352 | /// |
---|
1353 | /// Constructor |
---|
1354 | CombinedEdgeMap() : forward_map(0), backward_map(0) {} |
---|
1355 | |
---|
1356 | /// \brief Constructor |
---|
1357 | /// |
---|
1358 | /// Constructor |
---|
1359 | CombinedEdgeMap(ForwardMap& _forward_map, BackwardMap& _backward_map) |
---|
1360 | : forward_map(&_forward_map), backward_map(&_backward_map) {} |
---|
1361 | |
---|
1362 | |
---|
1363 | /// \brief Sets the value associated with a key. |
---|
1364 | /// |
---|
1365 | /// Sets the value associated with a key. |
---|
1366 | void set(const Key& e, const Value& a) { |
---|
1367 | if (Parent::direction(e)) { |
---|
1368 | forward_map->set(e, a); |
---|
1369 | } else { |
---|
1370 | backward_map->set(e, a); |
---|
1371 | } |
---|
1372 | } |
---|
1373 | |
---|
1374 | /// \brief Returns the value associated with a key. |
---|
1375 | /// |
---|
1376 | /// Returns the value associated with a key. |
---|
1377 | typename MapTraits<ForwardMap>::ConstReturnValue |
---|
1378 | operator[](const Key& e) const { |
---|
1379 | if (Parent::direction(e)) { |
---|
1380 | return (*forward_map)[e]; |
---|
1381 | } else { |
---|
1382 | return (*backward_map)[e]; |
---|
1383 | } |
---|
1384 | } |
---|
1385 | |
---|
1386 | /// \brief Returns the value associated with a key. |
---|
1387 | /// |
---|
1388 | /// Returns the value associated with a key. |
---|
1389 | typename MapTraits<ForwardMap>::ReturnValue |
---|
1390 | operator[](const Key& e) { |
---|
1391 | if (Parent::direction(e)) { |
---|
1392 | return (*forward_map)[e]; |
---|
1393 | } else { |
---|
1394 | return (*backward_map)[e]; |
---|
1395 | } |
---|
1396 | } |
---|
1397 | |
---|
1398 | /// \brief Sets the forward map |
---|
1399 | /// |
---|
1400 | /// Sets the forward map |
---|
1401 | void setForwardMap(ForwardMap& _forward_map) { |
---|
1402 | forward_map = &_forward_map; |
---|
1403 | } |
---|
1404 | |
---|
1405 | /// \brief Sets the backward map |
---|
1406 | /// |
---|
1407 | /// Sets the backward map |
---|
1408 | void setBackwardMap(BackwardMap& _backward_map) { |
---|
1409 | backward_map = &_backward_map; |
---|
1410 | } |
---|
1411 | |
---|
1412 | protected: |
---|
1413 | |
---|
1414 | ForwardMap* forward_map; |
---|
1415 | BackwardMap* backward_map; |
---|
1416 | |
---|
1417 | }; |
---|
1418 | |
---|
1419 | }; |
---|
1420 | |
---|
1421 | /// \brief Just gives back an undir graph adaptor |
---|
1422 | /// |
---|
1423 | /// Just gives back an undir graph adaptor |
---|
1424 | template<typename Graph> |
---|
1425 | UndirGraphAdaptor<const Graph> |
---|
1426 | undirGraphAdaptor(const Graph& graph) { |
---|
1427 | return UndirGraphAdaptor<const Graph>(graph); |
---|
1428 | } |
---|
1429 | |
---|
1430 | template<typename Graph, typename Number, |
---|
1431 | typename CapacityMap, typename FlowMap, |
---|
1432 | typename Tol = Tolerance<Number> > |
---|
1433 | class ResForwardFilter { |
---|
1434 | const CapacityMap* capacity; |
---|
1435 | const FlowMap* flow; |
---|
1436 | Tol tolerance; |
---|
1437 | public: |
---|
1438 | typedef typename Graph::Edge Key; |
---|
1439 | typedef bool Value; |
---|
1440 | |
---|
1441 | ResForwardFilter(const CapacityMap& _capacity, const FlowMap& _flow, |
---|
1442 | const Tol& _tolerance = Tol()) |
---|
1443 | : capacity(&_capacity), flow(&_flow), tolerance(_tolerance) { } |
---|
1444 | |
---|
1445 | ResForwardFilter(const Tol& _tolerance) |
---|
1446 | : capacity(0), flow(0), tolerance(_tolerance) { } |
---|
1447 | |
---|
1448 | void setCapacity(const CapacityMap& _capacity) { capacity = &_capacity; } |
---|
1449 | void setFlow(const FlowMap& _flow) { flow = &_flow; } |
---|
1450 | |
---|
1451 | bool operator[](const typename Graph::Edge& e) const { |
---|
1452 | return tolerance.positive((*capacity)[e] - (*flow)[e]); |
---|
1453 | } |
---|
1454 | }; |
---|
1455 | |
---|
1456 | template<typename Graph, typename Number, |
---|
1457 | typename CapacityMap, typename FlowMap, |
---|
1458 | typename Tol = Tolerance<Number> > |
---|
1459 | class ResBackwardFilter { |
---|
1460 | const CapacityMap* capacity; |
---|
1461 | const FlowMap* flow; |
---|
1462 | Tol tolerance; |
---|
1463 | public: |
---|
1464 | typedef typename Graph::Edge Key; |
---|
1465 | typedef bool Value; |
---|
1466 | |
---|
1467 | ResBackwardFilter(const CapacityMap& _capacity, const FlowMap& _flow, |
---|
1468 | const Tol& _tolerance = Tol()) |
---|
1469 | : capacity(&_capacity), flow(&_flow), tolerance(_tolerance) { } |
---|
1470 | ResBackwardFilter(const Tol& _tolerance = Tol()) |
---|
1471 | : capacity(0), flow(0), tolerance(_tolerance) { } |
---|
1472 | void setCapacity(const CapacityMap& _capacity) { capacity = &_capacity; } |
---|
1473 | void setFlow(const FlowMap& _flow) { flow = &_flow; } |
---|
1474 | bool operator[](const typename Graph::Edge& e) const { |
---|
1475 | return tolerance.positive((*flow)[e]); |
---|
1476 | } |
---|
1477 | }; |
---|
1478 | |
---|
1479 | |
---|
1480 | ///\ingroup graph_adaptors |
---|
1481 | /// |
---|
1482 | ///\brief An adaptor for composing the residual |
---|
1483 | ///graph for directed flow and circulation problems. |
---|
1484 | /// |
---|
1485 | ///An adaptor for composing the residual graph for directed flow and |
---|
1486 | ///circulation problems. Let \f$ G=(V, A) \f$ be a directed graph |
---|
1487 | ///and let \f$ F \f$ be a number type. Let moreover \f$ f,c:A\to F \f$, |
---|
1488 | ///be functions on the edge-set. |
---|
1489 | /// |
---|
1490 | ///In the appications of ResGraphAdaptor, \f$ f \f$ usually stands |
---|
1491 | ///for a flow and \f$ c \f$ for a capacity function. Suppose that a |
---|
1492 | ///graph instange \c g of type \c ListGraph implements \f$ G \f$. |
---|
1493 | /// |
---|
1494 | ///\code |
---|
1495 | /// ListGraph g; |
---|
1496 | ///\endcode |
---|
1497 | /// |
---|
1498 | ///Then ResGraphAdaptor implements the graph structure with node-set |
---|
1499 | /// \f$ V \f$ and edge-set \f$ A_{forward}\cup A_{backward} \f$, |
---|
1500 | ///where \f$ A_{forward}=\{uv : uv\in A, f(uv)<c(uv)\} \f$ and |
---|
1501 | /// \f$ A_{backward}=\{vu : uv\in A, f(uv)>0\} \f$, i.e. the so called |
---|
1502 | ///residual graph. When we take the union |
---|
1503 | /// \f$ A_{forward}\cup A_{backward} \f$, multilicities are counted, i.e. |
---|
1504 | ///if an edge is in both \f$ A_{forward} \f$ and \f$ A_{backward} \f$, |
---|
1505 | ///then in the adaptor it appears twice. The following code shows how |
---|
1506 | ///such an instance can be constructed. |
---|
1507 | /// |
---|
1508 | ///\code |
---|
1509 | /// typedef ListGraph Graph; |
---|
1510 | /// Graph::EdgeMap<int> f(g); |
---|
1511 | /// Graph::EdgeMap<int> c(g); |
---|
1512 | /// ResGraphAdaptor<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> > ga(g); |
---|
1513 | ///\endcode |
---|
1514 | ///\author Marton Makai |
---|
1515 | /// |
---|
1516 | template<typename Graph, typename Number, |
---|
1517 | typename CapacityMap, typename FlowMap, |
---|
1518 | typename Tol = Tolerance<Number> > |
---|
1519 | class ResGraphAdaptor : |
---|
1520 | public EdgeSubGraphAdaptor< |
---|
1521 | UndirGraphAdaptor<const Graph>, |
---|
1522 | typename UndirGraphAdaptor<const Graph>::template CombinedEdgeMap< |
---|
1523 | ResForwardFilter<const Graph, Number, CapacityMap, FlowMap>, |
---|
1524 | ResBackwardFilter<const Graph, Number, CapacityMap, FlowMap> > > { |
---|
1525 | public: |
---|
1526 | |
---|
1527 | typedef UndirGraphAdaptor<const Graph> UGraph; |
---|
1528 | |
---|
1529 | typedef ResForwardFilter<const Graph, Number, CapacityMap, FlowMap> |
---|
1530 | ForwardFilter; |
---|
1531 | |
---|
1532 | typedef ResBackwardFilter<const Graph, Number, CapacityMap, FlowMap> |
---|
1533 | BackwardFilter; |
---|
1534 | |
---|
1535 | typedef typename UGraph:: |
---|
1536 | template CombinedEdgeMap<ForwardFilter, BackwardFilter> |
---|
1537 | EdgeFilter; |
---|
1538 | |
---|
1539 | typedef EdgeSubGraphAdaptor<UGraph, EdgeFilter> Parent; |
---|
1540 | |
---|
1541 | protected: |
---|
1542 | |
---|
1543 | const CapacityMap* capacity; |
---|
1544 | FlowMap* flow; |
---|
1545 | |
---|
1546 | UGraph ugraph; |
---|
1547 | ForwardFilter forward_filter; |
---|
1548 | BackwardFilter backward_filter; |
---|
1549 | EdgeFilter edge_filter; |
---|
1550 | |
---|
1551 | void setCapacityMap(const CapacityMap& _capacity) { |
---|
1552 | capacity=&_capacity; |
---|
1553 | forward_filter.setCapacity(_capacity); |
---|
1554 | backward_filter.setCapacity(_capacity); |
---|
1555 | } |
---|
1556 | |
---|
1557 | void setFlowMap(FlowMap& _flow) { |
---|
1558 | flow=&_flow; |
---|
1559 | forward_filter.setFlow(_flow); |
---|
1560 | backward_filter.setFlow(_flow); |
---|
1561 | } |
---|
1562 | |
---|
1563 | public: |
---|
1564 | |
---|
1565 | /// \brief Constructor of the residual graph. |
---|
1566 | /// |
---|
1567 | /// Constructor of the residual graph. The parameters are the graph type, |
---|
1568 | /// the flow map, the capacity map and a tolerance object. |
---|
1569 | ResGraphAdaptor(const Graph& _graph, const CapacityMap& _capacity, |
---|
1570 | FlowMap& _flow, const Tol& _tolerance = Tol()) |
---|
1571 | : Parent(), capacity(&_capacity), flow(&_flow), ugraph(_graph), |
---|
1572 | forward_filter(_capacity, _flow, _tolerance), |
---|
1573 | backward_filter(_capacity, _flow, _tolerance), |
---|
1574 | edge_filter(forward_filter, backward_filter) |
---|
1575 | { |
---|
1576 | Parent::setGraph(ugraph); |
---|
1577 | Parent::setEdgeFilterMap(edge_filter); |
---|
1578 | } |
---|
1579 | |
---|
1580 | typedef typename Parent::Edge Edge; |
---|
1581 | |
---|
1582 | /// \brief Gives back the residual capacity of the edge. |
---|
1583 | /// |
---|
1584 | /// Gives back the residual capacity of the edge. |
---|
1585 | Number rescap(const Edge& edge) const { |
---|
1586 | if (UGraph::direction(edge)) { |
---|
1587 | return (*capacity)[edge]-(*flow)[edge]; |
---|
1588 | } else { |
---|
1589 | return (*flow)[edge]; |
---|
1590 | } |
---|
1591 | } |
---|
1592 | |
---|
1593 | /// \brief Augment on the given edge in the residual graph. |
---|
1594 | /// |
---|
1595 | /// Augment on the given edge in the residual graph. It increase |
---|
1596 | /// or decrease the flow on the original edge depend on the direction |
---|
1597 | /// of the residual edge. |
---|
1598 | void augment(const Edge& e, Number a) const { |
---|
1599 | if (UGraph::direction(e)) { |
---|
1600 | flow->set(e, (*flow)[e] + a); |
---|
1601 | } else { |
---|
1602 | flow->set(e, (*flow)[e] - a); |
---|
1603 | } |
---|
1604 | } |
---|
1605 | |
---|
1606 | /// \brief Returns the direction of the edge. |
---|
1607 | /// |
---|
1608 | /// Returns true when the edge is same oriented as the original edge. |
---|
1609 | static bool forward(const Edge& e) { |
---|
1610 | return UGraph::direction(e); |
---|
1611 | } |
---|
1612 | |
---|
1613 | /// \brief Returns the direction of the edge. |
---|
1614 | /// |
---|
1615 | /// Returns true when the edge is opposite oriented as the original edge. |
---|
1616 | static bool backward(const Edge& e) { |
---|
1617 | return !UGraph::direction(e); |
---|
1618 | } |
---|
1619 | |
---|
1620 | /// \brief Gives back the forward oriented residual edge. |
---|
1621 | /// |
---|
1622 | /// Gives back the forward oriented residual edge. |
---|
1623 | static Edge forward(const typename Graph::Edge& e) { |
---|
1624 | return UGraph::direct(e, true); |
---|
1625 | } |
---|
1626 | |
---|
1627 | /// \brief Gives back the backward oriented residual edge. |
---|
1628 | /// |
---|
1629 | /// Gives back the backward oriented residual edge. |
---|
1630 | static Edge backward(const typename Graph::Edge& e) { |
---|
1631 | return UGraph::direct(e, false); |
---|
1632 | } |
---|
1633 | |
---|
1634 | /// \brief Residual capacity map. |
---|
1635 | /// |
---|
1636 | /// In generic residual graphs the residual capacity can be obtained |
---|
1637 | /// as a map. |
---|
1638 | class ResCap { |
---|
1639 | protected: |
---|
1640 | const ResGraphAdaptor* res_graph; |
---|
1641 | public: |
---|
1642 | typedef Number Value; |
---|
1643 | typedef Edge Key; |
---|
1644 | ResCap(const ResGraphAdaptor& _res_graph) |
---|
1645 | : res_graph(&_res_graph) {} |
---|
1646 | |
---|
1647 | Number operator[](const Edge& e) const { |
---|
1648 | return res_graph->rescap(e); |
---|
1649 | } |
---|
1650 | |
---|
1651 | }; |
---|
1652 | |
---|
1653 | }; |
---|
1654 | |
---|
1655 | |
---|
1656 | |
---|
1657 | template <typename _Graph, typename FirstOutEdgesMap> |
---|
1658 | class ErasingFirstGraphAdaptorBase : public GraphAdaptorBase<_Graph> { |
---|
1659 | public: |
---|
1660 | typedef _Graph Graph; |
---|
1661 | typedef GraphAdaptorBase<_Graph> Parent; |
---|
1662 | protected: |
---|
1663 | FirstOutEdgesMap* first_out_edges; |
---|
1664 | ErasingFirstGraphAdaptorBase() : Parent(), |
---|
1665 | first_out_edges(0) { } |
---|
1666 | |
---|
1667 | void setFirstOutEdgesMap(FirstOutEdgesMap& _first_out_edges) { |
---|
1668 | first_out_edges=&_first_out_edges; |
---|
1669 | } |
---|
1670 | |
---|
1671 | public: |
---|
1672 | |
---|
1673 | typedef typename Parent::Node Node; |
---|
1674 | typedef typename Parent::Edge Edge; |
---|
1675 | |
---|
1676 | void firstOut(Edge& i, const Node& n) const { |
---|
1677 | i=(*first_out_edges)[n]; |
---|
1678 | } |
---|
1679 | |
---|
1680 | void erase(const Edge& e) const { |
---|
1681 | Node n=source(e); |
---|
1682 | Edge f=e; |
---|
1683 | Parent::nextOut(f); |
---|
1684 | first_out_edges->set(n, f); |
---|
1685 | } |
---|
1686 | }; |
---|
1687 | |
---|
1688 | |
---|
1689 | ///\ingroup graph_adaptors |
---|
1690 | /// |
---|
1691 | ///\brief For blocking flows. |
---|
1692 | /// |
---|
1693 | ///This graph adaptor is used for on-the-fly |
---|
1694 | ///Dinits blocking flow computations. |
---|
1695 | ///For each node, an out-edge is stored which is used when the |
---|
1696 | ///\code |
---|
1697 | ///OutEdgeIt& first(OutEdgeIt&, const Node&) |
---|
1698 | ///\endcode |
---|
1699 | ///is called. |
---|
1700 | /// |
---|
1701 | ///\author Marton Makai |
---|
1702 | /// |
---|
1703 | template <typename _Graph, typename FirstOutEdgesMap> |
---|
1704 | class ErasingFirstGraphAdaptor : |
---|
1705 | public GraphAdaptorExtender< |
---|
1706 | ErasingFirstGraphAdaptorBase<_Graph, FirstOutEdgesMap> > { |
---|
1707 | public: |
---|
1708 | typedef _Graph Graph; |
---|
1709 | typedef GraphAdaptorExtender< |
---|
1710 | ErasingFirstGraphAdaptorBase<_Graph, FirstOutEdgesMap> > Parent; |
---|
1711 | ErasingFirstGraphAdaptor(Graph& _graph, |
---|
1712 | FirstOutEdgesMap& _first_out_edges) { |
---|
1713 | setGraph(_graph); |
---|
1714 | setFirstOutEdgesMap(_first_out_edges); |
---|
1715 | } |
---|
1716 | |
---|
1717 | }; |
---|
1718 | |
---|
1719 | /// \brief Base class for split graph adaptor |
---|
1720 | /// |
---|
1721 | /// Base class of split graph adaptor. In most case you do not need to |
---|
1722 | /// use it directly but the documented member functions of this class can |
---|
1723 | /// be used with the SplitGraphAdaptor class. |
---|
1724 | /// \sa SplitGraphAdaptor |
---|
1725 | template <typename _Graph> |
---|
1726 | class SplitGraphAdaptorBase |
---|
1727 | : public GraphAdaptorBase<const _Graph> { |
---|
1728 | public: |
---|
1729 | |
---|
1730 | typedef _Graph Graph; |
---|
1731 | |
---|
1732 | typedef GraphAdaptorBase<const _Graph> Parent; |
---|
1733 | |
---|
1734 | typedef typename Graph::Node GraphNode; |
---|
1735 | typedef typename Graph::Edge GraphEdge; |
---|
1736 | |
---|
1737 | class Node; |
---|
1738 | class Edge; |
---|
1739 | |
---|
1740 | template <typename T> class NodeMap; |
---|
1741 | template <typename T> class EdgeMap; |
---|
1742 | |
---|
1743 | |
---|
1744 | class Node : public GraphNode { |
---|
1745 | friend class SplitGraphAdaptorBase; |
---|
1746 | template <typename T> friend class NodeMap; |
---|
1747 | private: |
---|
1748 | |
---|
1749 | bool in_node; |
---|
1750 | Node(GraphNode _node, bool _in_node) |
---|
1751 | : GraphNode(_node), in_node(_in_node) {} |
---|
1752 | |
---|
1753 | public: |
---|
1754 | |
---|
1755 | Node() {} |
---|
1756 | Node(Invalid) : GraphNode(INVALID), in_node(true) {} |
---|
1757 | |
---|
1758 | bool operator==(const Node& node) const { |
---|
1759 | return GraphNode::operator==(node) && in_node == node.in_node; |
---|
1760 | } |
---|
1761 | |
---|
1762 | bool operator!=(const Node& node) const { |
---|
1763 | return !(*this == node); |
---|
1764 | } |
---|
1765 | |
---|
1766 | bool operator<(const Node& node) const { |
---|
1767 | return GraphNode::operator<(node) || |
---|
1768 | (GraphNode::operator==(node) && in_node < node.in_node); |
---|
1769 | } |
---|
1770 | }; |
---|
1771 | |
---|
1772 | class Edge { |
---|
1773 | friend class SplitGraphAdaptorBase; |
---|
1774 | template <typename T> friend class EdgeMap; |
---|
1775 | private: |
---|
1776 | typedef BiVariant<GraphEdge, GraphNode> EdgeImpl; |
---|
1777 | |
---|
1778 | explicit Edge(const GraphEdge& edge) : item(edge) {} |
---|
1779 | explicit Edge(const GraphNode& node) : item(node) {} |
---|
1780 | |
---|
1781 | EdgeImpl item; |
---|
1782 | |
---|
1783 | public: |
---|
1784 | Edge() {} |
---|
1785 | Edge(Invalid) : item(GraphEdge(INVALID)) {} |
---|
1786 | |
---|
1787 | bool operator==(const Edge& edge) const { |
---|
1788 | if (item.firstState()) { |
---|
1789 | if (edge.item.firstState()) { |
---|
1790 | return item.first() == edge.item.first(); |
---|
1791 | } |
---|
1792 | } else { |
---|
1793 | if (edge.item.secondState()) { |
---|
1794 | return item.second() == edge.item.second(); |
---|
1795 | } |
---|
1796 | } |
---|
1797 | return false; |
---|
1798 | } |
---|
1799 | |
---|
1800 | bool operator!=(const Edge& edge) const { |
---|
1801 | return !(*this == edge); |
---|
1802 | } |
---|
1803 | |
---|
1804 | bool operator<(const Edge& edge) const { |
---|
1805 | if (item.firstState()) { |
---|
1806 | if (edge.item.firstState()) { |
---|
1807 | return item.first() < edge.item.first(); |
---|
1808 | } |
---|
1809 | return false; |
---|
1810 | } else { |
---|
1811 | if (edge.item.secondState()) { |
---|
1812 | return item.second() < edge.item.second(); |
---|
1813 | } |
---|
1814 | return true; |
---|
1815 | } |
---|
1816 | } |
---|
1817 | |
---|
1818 | operator GraphEdge() const { return item.first(); } |
---|
1819 | operator GraphNode() const { return item.second(); } |
---|
1820 | |
---|
1821 | }; |
---|
1822 | |
---|
1823 | void first(Node& n) const { |
---|
1824 | Parent::first(n); |
---|
1825 | n.in_node = true; |
---|
1826 | } |
---|
1827 | |
---|
1828 | void next(Node& n) const { |
---|
1829 | if (n.in_node) { |
---|
1830 | n.in_node = false; |
---|
1831 | } else { |
---|
1832 | n.in_node = true; |
---|
1833 | Parent::next(n); |
---|
1834 | } |
---|
1835 | } |
---|
1836 | |
---|
1837 | void first(Edge& e) const { |
---|
1838 | e.item.setSecond(); |
---|
1839 | Parent::first(e.item.second()); |
---|
1840 | if (e.item.second() == INVALID) { |
---|
1841 | e.item.setFirst(); |
---|
1842 | Parent::first(e.item.first()); |
---|
1843 | } |
---|
1844 | } |
---|
1845 | |
---|
1846 | void next(Edge& e) const { |
---|
1847 | if (e.item.secondState()) { |
---|
1848 | Parent::next(e.item.second()); |
---|
1849 | if (e.item.second() == INVALID) { |
---|
1850 | e.item.setFirst(); |
---|
1851 | Parent::first(e.item.first()); |
---|
1852 | } |
---|
1853 | } else { |
---|
1854 | Parent::next(e.item.first()); |
---|
1855 | } |
---|
1856 | } |
---|
1857 | |
---|
1858 | void firstOut(Edge& e, const Node& n) const { |
---|
1859 | if (n.in_node) { |
---|
1860 | e.item.setSecond(n); |
---|
1861 | } else { |
---|
1862 | e.item.setFirst(); |
---|
1863 | Parent::firstOut(e.item.first(), n); |
---|
1864 | } |
---|
1865 | } |
---|
1866 | |
---|
1867 | void nextOut(Edge& e) const { |
---|
1868 | if (!e.item.firstState()) { |
---|
1869 | e.item.setFirst(INVALID); |
---|
1870 | } else { |
---|
1871 | Parent::nextOut(e.item.first()); |
---|
1872 | } |
---|
1873 | } |
---|
1874 | |
---|
1875 | void firstIn(Edge& e, const Node& n) const { |
---|
1876 | if (!n.in_node) { |
---|
1877 | e.item.setSecond(n); |
---|
1878 | } else { |
---|
1879 | e.item.setFirst(); |
---|
1880 | Parent::firstIn(e.item.first(), n); |
---|
1881 | } |
---|
1882 | } |
---|
1883 | |
---|
1884 | void nextIn(Edge& e) const { |
---|
1885 | if (!e.item.firstState()) { |
---|
1886 | e.item.setFirst(INVALID); |
---|
1887 | } else { |
---|
1888 | Parent::nextIn(e.item.first()); |
---|
1889 | } |
---|
1890 | } |
---|
1891 | |
---|
1892 | Node source(const Edge& e) const { |
---|
1893 | if (e.item.firstState()) { |
---|
1894 | return Node(Parent::source(e.item.first()), false); |
---|
1895 | } else { |
---|
1896 | return Node(e.item.second(), true); |
---|
1897 | } |
---|
1898 | } |
---|
1899 | |
---|
1900 | Node target(const Edge& e) const { |
---|
1901 | if (e.item.firstState()) { |
---|
1902 | return Node(Parent::target(e.item.first()), true); |
---|
1903 | } else { |
---|
1904 | return Node(e.item.second(), false); |
---|
1905 | } |
---|
1906 | } |
---|
1907 | |
---|
1908 | int id(const Node& n) const { |
---|
1909 | return (Parent::id(n) << 1) | (n.in_node ? 0 : 1); |
---|
1910 | } |
---|
1911 | Node nodeFromId(int ix) const { |
---|
1912 | return Node(Parent::nodeFromId(ix >> 1), (ix & 1) == 0); |
---|
1913 | } |
---|
1914 | int maxNodeId() const { |
---|
1915 | return 2 * Parent::maxNodeId() + 1; |
---|
1916 | } |
---|
1917 | |
---|
1918 | int id(const Edge& e) const { |
---|
1919 | if (e.item.firstState()) { |
---|
1920 | return Parent::id(e.item.first()) << 1; |
---|
1921 | } else { |
---|
1922 | return (Parent::id(e.item.second()) << 1) | 1; |
---|
1923 | } |
---|
1924 | } |
---|
1925 | Edge edgeFromId(int ix) const { |
---|
1926 | if ((ix & 1) == 0) { |
---|
1927 | return Edge(Parent::edgeFromId(ix >> 1)); |
---|
1928 | } else { |
---|
1929 | return Edge(Parent::nodeFromId(ix >> 1)); |
---|
1930 | } |
---|
1931 | } |
---|
1932 | int maxEdgeId() const { |
---|
1933 | return std::max(Parent::maxNodeId() << 1, |
---|
1934 | (Parent::maxEdgeId() << 1) | 1); |
---|
1935 | } |
---|
1936 | |
---|
1937 | /// \brief Returns true when the node is in-node. |
---|
1938 | /// |
---|
1939 | /// Returns true when the node is in-node. |
---|
1940 | static bool inNode(const Node& n) { |
---|
1941 | return n.in_node; |
---|
1942 | } |
---|
1943 | |
---|
1944 | /// \brief Returns true when the node is out-node. |
---|
1945 | /// |
---|
1946 | /// Returns true when the node is out-node. |
---|
1947 | static bool outNode(const Node& n) { |
---|
1948 | return !n.in_node; |
---|
1949 | } |
---|
1950 | |
---|
1951 | /// \brief Returns true when the edge is edge in the original graph. |
---|
1952 | /// |
---|
1953 | /// Returns true when the edge is edge in the original graph. |
---|
1954 | static bool origEdge(const Edge& e) { |
---|
1955 | return e.item.firstState(); |
---|
1956 | } |
---|
1957 | |
---|
1958 | /// \brief Returns true when the edge binds an in-node and an out-node. |
---|
1959 | /// |
---|
1960 | /// Returns true when the edge binds an in-node and an out-node. |
---|
1961 | static bool bindEdge(const Edge& e) { |
---|
1962 | return e.item.secondState(); |
---|
1963 | } |
---|
1964 | |
---|
1965 | /// \brief Gives back the in-node created from the \c node. |
---|
1966 | /// |
---|
1967 | /// Gives back the in-node created from the \c node. |
---|
1968 | static Node inNode(const GraphNode& n) { |
---|
1969 | return Node(n, true); |
---|
1970 | } |
---|
1971 | |
---|
1972 | /// \brief Gives back the out-node created from the \c node. |
---|
1973 | /// |
---|
1974 | /// Gives back the out-node created from the \c node. |
---|
1975 | static Node outNode(const GraphNode& n) { |
---|
1976 | return Node(n, false); |
---|
1977 | } |
---|
1978 | |
---|
1979 | /// \brief Gives back the edge binds the two part of the node. |
---|
1980 | /// |
---|
1981 | /// Gives back the edge binds the two part of the node. |
---|
1982 | static Edge edge(const GraphNode& n) { |
---|
1983 | return Edge(n); |
---|
1984 | } |
---|
1985 | |
---|
1986 | /// \brief Gives back the edge of the original edge. |
---|
1987 | /// |
---|
1988 | /// Gives back the edge of the original edge. |
---|
1989 | static Edge edge(const GraphEdge& e) { |
---|
1990 | return Edge(e); |
---|
1991 | } |
---|
1992 | |
---|
1993 | typedef True NodeNumTag; |
---|
1994 | |
---|
1995 | int nodeNum() const { |
---|
1996 | return 2 * countNodes(*Parent::graph); |
---|
1997 | } |
---|
1998 | |
---|
1999 | typedef True EdgeNumTag; |
---|
2000 | |
---|
2001 | int edgeNum() const { |
---|
2002 | return countEdges(*Parent::graph) + countNodes(*Parent::graph); |
---|
2003 | } |
---|
2004 | |
---|
2005 | typedef True FindEdgeTag; |
---|
2006 | |
---|
2007 | Edge findEdge(const Node& u, const Node& v, |
---|
2008 | const Edge& prev = INVALID) const { |
---|
2009 | if (inNode(u)) { |
---|
2010 | if (outNode(v)) { |
---|
2011 | if (static_cast<const GraphNode&>(u) == |
---|
2012 | static_cast<const GraphNode&>(v) && prev == INVALID) { |
---|
2013 | return Edge(u); |
---|
2014 | } |
---|
2015 | } |
---|
2016 | } else { |
---|
2017 | if (inNode(v)) { |
---|
2018 | return Edge(findEdge(*Parent::graph, u, v, prev)); |
---|
2019 | } |
---|
2020 | } |
---|
2021 | return INVALID; |
---|
2022 | } |
---|
2023 | |
---|
2024 | |
---|
2025 | template <typename T> |
---|
2026 | class NodeMap : public MapBase<Node, T> { |
---|
2027 | typedef typename Parent::template NodeMap<T> NodeImpl; |
---|
2028 | public: |
---|
2029 | NodeMap(const SplitGraphAdaptorBase& _graph) |
---|
2030 | : inNodeMap(_graph), outNodeMap(_graph) {} |
---|
2031 | NodeMap(const SplitGraphAdaptorBase& _graph, const T& t) |
---|
2032 | : inNodeMap(_graph, t), outNodeMap(_graph, t) {} |
---|
2033 | NodeMap& operator=(const NodeMap& cmap) { |
---|
2034 | return operator=<NodeMap>(cmap); |
---|
2035 | } |
---|
2036 | template <typename CMap> |
---|
2037 | NodeMap& operator=(const CMap& cmap) { |
---|
2038 | Parent::operator=(cmap); |
---|
2039 | return *this; |
---|
2040 | } |
---|
2041 | |
---|
2042 | void set(const Node& key, const T& val) { |
---|
2043 | if (SplitGraphAdaptorBase::inNode(key)) { inNodeMap.set(key, val); } |
---|
2044 | else {outNodeMap.set(key, val); } |
---|
2045 | } |
---|
2046 | |
---|
2047 | typename MapTraits<NodeImpl>::ReturnValue |
---|
2048 | operator[](const Node& key) { |
---|
2049 | if (SplitGraphAdaptorBase::inNode(key)) { return inNodeMap[key]; } |
---|
2050 | else { return outNodeMap[key]; } |
---|
2051 | } |
---|
2052 | |
---|
2053 | typename MapTraits<NodeImpl>::ConstReturnValue |
---|
2054 | operator[](const Node& key) const { |
---|
2055 | if (SplitGraphAdaptorBase::inNode(key)) { return inNodeMap[key]; } |
---|
2056 | else { return outNodeMap[key]; } |
---|
2057 | } |
---|
2058 | |
---|
2059 | private: |
---|
2060 | NodeImpl inNodeMap, outNodeMap; |
---|
2061 | }; |
---|
2062 | |
---|
2063 | template <typename T> |
---|
2064 | class EdgeMap : public MapBase<Edge, T> { |
---|
2065 | typedef typename Parent::template EdgeMap<T> EdgeMapImpl; |
---|
2066 | typedef typename Parent::template NodeMap<T> NodeMapImpl; |
---|
2067 | public: |
---|
2068 | |
---|
2069 | EdgeMap(const SplitGraphAdaptorBase& _graph) |
---|
2070 | : edge_map(_graph), node_map(_graph) {} |
---|
2071 | EdgeMap(const SplitGraphAdaptorBase& _graph, const T& t) |
---|
2072 | : edge_map(_graph, t), node_map(_graph, t) {} |
---|
2073 | EdgeMap& operator=(const EdgeMap& cmap) { |
---|
2074 | return operator=<EdgeMap>(cmap); |
---|
2075 | } |
---|
2076 | template <typename CMap> |
---|
2077 | EdgeMap& operator=(const CMap& cmap) { |
---|
2078 | Parent::operator=(cmap); |
---|
2079 | return *this; |
---|
2080 | } |
---|
2081 | |
---|
2082 | void set(const Edge& key, const T& val) { |
---|
2083 | if (SplitGraphAdaptorBase::origEdge(key)) { |
---|
2084 | edge_map.set(key.item.first(), val); |
---|
2085 | } else { |
---|
2086 | node_map.set(key.item.second(), val); |
---|
2087 | } |
---|
2088 | } |
---|
2089 | |
---|
2090 | typename MapTraits<EdgeMapImpl>::ReturnValue |
---|
2091 | operator[](const Edge& key) { |
---|
2092 | if (SplitGraphAdaptorBase::origEdge(key)) { |
---|
2093 | return edge_map[key.item.first()]; |
---|
2094 | } else { |
---|
2095 | return node_map[key.item.second()]; |
---|
2096 | } |
---|
2097 | } |
---|
2098 | |
---|
2099 | typename MapTraits<EdgeMapImpl>::ConstReturnValue |
---|
2100 | operator[](const Edge& key) const { |
---|
2101 | if (SplitGraphAdaptorBase::origEdge(key)) { |
---|
2102 | return edge_map[key.item.first()]; |
---|
2103 | } else { |
---|
2104 | return node_map[key.item.second()]; |
---|
2105 | } |
---|
2106 | } |
---|
2107 | |
---|
2108 | private: |
---|
2109 | typename Parent::template EdgeMap<T> edge_map; |
---|
2110 | typename Parent::template NodeMap<T> node_map; |
---|
2111 | }; |
---|
2112 | |
---|
2113 | |
---|
2114 | }; |
---|
2115 | |
---|
2116 | template <typename _Graph, typename NodeEnable = void, |
---|
2117 | typename EdgeEnable = void> |
---|
2118 | class AlterableSplitGraphAdaptor |
---|
2119 | : public GraphAdaptorExtender<SplitGraphAdaptorBase<_Graph> > { |
---|
2120 | public: |
---|
2121 | |
---|
2122 | typedef GraphAdaptorExtender<SplitGraphAdaptorBase<_Graph> > Parent; |
---|
2123 | typedef _Graph Graph; |
---|
2124 | |
---|
2125 | typedef typename Graph::Node GraphNode; |
---|
2126 | typedef typename Graph::Node GraphEdge; |
---|
2127 | |
---|
2128 | protected: |
---|
2129 | |
---|
2130 | AlterableSplitGraphAdaptor() : Parent() {} |
---|
2131 | |
---|
2132 | public: |
---|
2133 | |
---|
2134 | typedef InvalidType NodeNotifier; |
---|
2135 | typedef InvalidType EdgeNotifier; |
---|
2136 | |
---|
2137 | }; |
---|
2138 | |
---|
2139 | template <typename _Graph, typename EdgeEnable> |
---|
2140 | class AlterableSplitGraphAdaptor< |
---|
2141 | _Graph, |
---|
2142 | typename enable_if<typename _Graph::NodeNotifier::Notifier>::type, |
---|
2143 | EdgeEnable> |
---|
2144 | : public GraphAdaptorExtender<SplitGraphAdaptorBase<_Graph> > { |
---|
2145 | public: |
---|
2146 | |
---|
2147 | typedef GraphAdaptorExtender<SplitGraphAdaptorBase<_Graph> > Parent; |
---|
2148 | typedef _Graph Graph; |
---|
2149 | |
---|
2150 | typedef typename Graph::Node GraphNode; |
---|
2151 | typedef typename Graph::Edge GraphEdge; |
---|
2152 | |
---|
2153 | typedef typename Parent::Node Node; |
---|
2154 | typedef typename Parent::Edge Edge; |
---|
2155 | |
---|
2156 | protected: |
---|
2157 | |
---|
2158 | AlterableSplitGraphAdaptor() |
---|
2159 | : Parent(), node_notifier(*this), node_notifier_proxy(*this) {} |
---|
2160 | |
---|
2161 | void setGraph(_Graph& graph) { |
---|
2162 | Parent::setGraph(graph); |
---|
2163 | node_notifier_proxy.setNotifier(graph.notifier(GraphNode())); |
---|
2164 | } |
---|
2165 | |
---|
2166 | public: |
---|
2167 | |
---|
2168 | ~AlterableSplitGraphAdaptor() { |
---|
2169 | node_notifier.clear(); |
---|
2170 | } |
---|
2171 | |
---|
2172 | typedef AlterationNotifier<AlterableSplitGraphAdaptor, Node> NodeNotifier; |
---|
2173 | typedef InvalidType EdgeNotifier; |
---|
2174 | |
---|
2175 | NodeNotifier& notifier(Node) const { return node_notifier; } |
---|
2176 | |
---|
2177 | protected: |
---|
2178 | |
---|
2179 | class NodeNotifierProxy : public Graph::NodeNotifier::ObserverBase { |
---|
2180 | public: |
---|
2181 | |
---|
2182 | typedef typename Graph::NodeNotifier::ObserverBase Parent; |
---|
2183 | typedef AlterableSplitGraphAdaptor AdaptorBase; |
---|
2184 | |
---|
2185 | NodeNotifierProxy(const AdaptorBase& _adaptor) |
---|
2186 | : Parent(), adaptor(&_adaptor) { |
---|
2187 | } |
---|
2188 | |
---|
2189 | virtual ~NodeNotifierProxy() { |
---|
2190 | if (Parent::attached()) { |
---|
2191 | Parent::detach(); |
---|
2192 | } |
---|
2193 | } |
---|
2194 | |
---|
2195 | void setNotifier(typename Graph::NodeNotifier& graph_notifier) { |
---|
2196 | Parent::attach(graph_notifier); |
---|
2197 | } |
---|
2198 | |
---|
2199 | |
---|
2200 | protected: |
---|
2201 | |
---|
2202 | virtual void add(const GraphNode& gn) { |
---|
2203 | std::vector<Node> nodes; |
---|
2204 | nodes.push_back(AdaptorBase::Parent::inNode(gn)); |
---|
2205 | nodes.push_back(AdaptorBase::Parent::outNode(gn)); |
---|
2206 | adaptor->notifier(Node()).add(nodes); |
---|
2207 | } |
---|
2208 | |
---|
2209 | virtual void add(const std::vector<GraphNode>& gn) { |
---|
2210 | std::vector<Node> nodes; |
---|
2211 | for (int i = 0; i < int(gn.size()); ++i) { |
---|
2212 | nodes.push_back(AdaptorBase::Parent::inNode(gn[i])); |
---|
2213 | nodes.push_back(AdaptorBase::Parent::outNode(gn[i])); |
---|
2214 | } |
---|
2215 | adaptor->notifier(Node()).add(nodes); |
---|
2216 | } |
---|
2217 | |
---|
2218 | virtual void erase(const GraphNode& gn) { |
---|
2219 | std::vector<Node> nodes; |
---|
2220 | nodes.push_back(AdaptorBase::Parent::inNode(gn)); |
---|
2221 | nodes.push_back(AdaptorBase::Parent::outNode(gn)); |
---|
2222 | adaptor->notifier(Node()).erase(nodes); |
---|
2223 | } |
---|
2224 | |
---|
2225 | virtual void erase(const std::vector<GraphNode>& gn) { |
---|
2226 | std::vector<Node> nodes; |
---|
2227 | for (int i = 0; i < int(gn.size()); ++i) { |
---|
2228 | nodes.push_back(AdaptorBase::Parent::inNode(gn[i])); |
---|
2229 | nodes.push_back(AdaptorBase::Parent::outNode(gn[i])); |
---|
2230 | } |
---|
2231 | adaptor->notifier(Node()).erase(nodes); |
---|
2232 | } |
---|
2233 | virtual void build() { |
---|
2234 | adaptor->notifier(Node()).build(); |
---|
2235 | } |
---|
2236 | virtual void clear() { |
---|
2237 | adaptor->notifier(Node()).clear(); |
---|
2238 | } |
---|
2239 | |
---|
2240 | const AdaptorBase* adaptor; |
---|
2241 | }; |
---|
2242 | |
---|
2243 | |
---|
2244 | mutable NodeNotifier node_notifier; |
---|
2245 | |
---|
2246 | NodeNotifierProxy node_notifier_proxy; |
---|
2247 | |
---|
2248 | }; |
---|
2249 | |
---|
2250 | template <typename _Graph> |
---|
2251 | class AlterableSplitGraphAdaptor< |
---|
2252 | _Graph, |
---|
2253 | typename enable_if<typename _Graph::NodeNotifier::Notifier>::type, |
---|
2254 | typename enable_if<typename _Graph::EdgeNotifier::Notifier>::type> |
---|
2255 | : public GraphAdaptorExtender<SplitGraphAdaptorBase<_Graph> > { |
---|
2256 | public: |
---|
2257 | |
---|
2258 | typedef GraphAdaptorExtender<SplitGraphAdaptorBase<_Graph> > Parent; |
---|
2259 | typedef _Graph Graph; |
---|
2260 | |
---|
2261 | typedef typename Graph::Node GraphNode; |
---|
2262 | typedef typename Graph::Edge GraphEdge; |
---|
2263 | |
---|
2264 | typedef typename Parent::Node Node; |
---|
2265 | typedef typename Parent::Edge Edge; |
---|
2266 | |
---|
2267 | protected: |
---|
2268 | |
---|
2269 | AlterableSplitGraphAdaptor() |
---|
2270 | : Parent(), node_notifier(*this), edge_notifier(*this), |
---|
2271 | node_notifier_proxy(*this), edge_notifier_proxy(*this) {} |
---|
2272 | |
---|
2273 | void setGraph(_Graph& g) { |
---|
2274 | Parent::setGraph(g); |
---|
2275 | node_notifier_proxy.setNotifier(g.notifier(GraphNode())); |
---|
2276 | edge_notifier_proxy.setNotifier(g.notifier(GraphEdge())); |
---|
2277 | } |
---|
2278 | |
---|
2279 | public: |
---|
2280 | |
---|
2281 | ~AlterableSplitGraphAdaptor() { |
---|
2282 | node_notifier.clear(); |
---|
2283 | edge_notifier.clear(); |
---|
2284 | } |
---|
2285 | |
---|
2286 | typedef AlterationNotifier<AlterableSplitGraphAdaptor, Node> NodeNotifier; |
---|
2287 | typedef AlterationNotifier<AlterableSplitGraphAdaptor, Edge> EdgeNotifier; |
---|
2288 | |
---|
2289 | NodeNotifier& notifier(Node) const { return node_notifier; } |
---|
2290 | EdgeNotifier& notifier(Edge) const { return edge_notifier; } |
---|
2291 | |
---|
2292 | protected: |
---|
2293 | |
---|
2294 | class NodeNotifierProxy : public Graph::NodeNotifier::ObserverBase { |
---|
2295 | public: |
---|
2296 | |
---|
2297 | typedef typename Graph::NodeNotifier::ObserverBase Parent; |
---|
2298 | typedef AlterableSplitGraphAdaptor AdaptorBase; |
---|
2299 | |
---|
2300 | NodeNotifierProxy(const AdaptorBase& _adaptor) |
---|
2301 | : Parent(), adaptor(&_adaptor) { |
---|
2302 | } |
---|
2303 | |
---|
2304 | virtual ~NodeNotifierProxy() { |
---|
2305 | if (Parent::attached()) { |
---|
2306 | Parent::detach(); |
---|
2307 | } |
---|
2308 | } |
---|
2309 | |
---|
2310 | void setNotifier(typename Graph::NodeNotifier& graph_notifier) { |
---|
2311 | Parent::attach(graph_notifier); |
---|
2312 | } |
---|
2313 | |
---|
2314 | |
---|
2315 | protected: |
---|
2316 | |
---|
2317 | virtual void add(const GraphNode& gn) { |
---|
2318 | std::vector<Node> nodes; |
---|
2319 | nodes.push_back(AdaptorBase::Parent::inNode(gn)); |
---|
2320 | nodes.push_back(AdaptorBase::Parent::outNode(gn)); |
---|
2321 | adaptor->notifier(Node()).add(nodes); |
---|
2322 | adaptor->notifier(Edge()).add(AdaptorBase::Parent::edge(gn)); |
---|
2323 | } |
---|
2324 | virtual void add(const std::vector<GraphNode>& gn) { |
---|
2325 | std::vector<Node> nodes; |
---|
2326 | std::vector<Edge> edges; |
---|
2327 | for (int i = 0; i < int(gn.size()); ++i) { |
---|
2328 | edges.push_back(AdaptorBase::Parent::edge(gn[i])); |
---|
2329 | nodes.push_back(AdaptorBase::Parent::inNode(gn[i])); |
---|
2330 | nodes.push_back(AdaptorBase::Parent::outNode(gn[i])); |
---|
2331 | } |
---|
2332 | adaptor->notifier(Node()).add(nodes); |
---|
2333 | adaptor->notifier(Edge()).add(edges); |
---|
2334 | } |
---|
2335 | virtual void erase(const GraphNode& gn) { |
---|
2336 | adaptor->notifier(Edge()).erase(AdaptorBase::Parent::edge(gn)); |
---|
2337 | std::vector<Node> nodes; |
---|
2338 | nodes.push_back(AdaptorBase::Parent::inNode(gn)); |
---|
2339 | nodes.push_back(AdaptorBase::Parent::outNode(gn)); |
---|
2340 | adaptor->notifier(Node()).erase(nodes); |
---|
2341 | } |
---|
2342 | virtual void erase(const std::vector<GraphNode>& gn) { |
---|
2343 | std::vector<Node> nodes; |
---|
2344 | std::vector<Edge> edges; |
---|
2345 | for (int i = 0; i < int(gn.size()); ++i) { |
---|
2346 | edges.push_back(AdaptorBase::Parent::edge(gn[i])); |
---|
2347 | nodes.push_back(AdaptorBase::Parent::inNode(gn[i])); |
---|
2348 | nodes.push_back(AdaptorBase::Parent::outNode(gn[i])); |
---|
2349 | } |
---|
2350 | adaptor->notifier(Edge()).erase(edges); |
---|
2351 | adaptor->notifier(Node()).erase(nodes); |
---|
2352 | } |
---|
2353 | virtual void build() { |
---|
2354 | std::vector<Edge> edges; |
---|
2355 | const typename Parent::Notifier* nf = Parent::notifier(); |
---|
2356 | GraphNode it; |
---|
2357 | for (nf->first(it); it != INVALID; nf->next(it)) { |
---|
2358 | edges.push_back(AdaptorBase::Parent::edge(it)); |
---|
2359 | } |
---|
2360 | adaptor->notifier(Node()).build(); |
---|
2361 | adaptor->notifier(Edge()).add(edges); |
---|
2362 | } |
---|
2363 | virtual void clear() { |
---|
2364 | std::vector<Edge> edges; |
---|
2365 | const typename Parent::Notifier* nf = Parent::notifier(); |
---|
2366 | GraphNode it; |
---|
2367 | for (nf->first(it); it != INVALID; nf->next(it)) { |
---|
2368 | edges.push_back(AdaptorBase::Parent::edge(it)); |
---|
2369 | } |
---|
2370 | adaptor->notifier(Edge()).erase(edges); |
---|
2371 | adaptor->notifier(Node()).clear(); |
---|
2372 | } |
---|
2373 | |
---|
2374 | const AdaptorBase* adaptor; |
---|
2375 | }; |
---|
2376 | |
---|
2377 | class EdgeNotifierProxy : public Graph::EdgeNotifier::ObserverBase { |
---|
2378 | public: |
---|
2379 | |
---|
2380 | typedef typename Graph::EdgeNotifier::ObserverBase Parent; |
---|
2381 | typedef AlterableSplitGraphAdaptor AdaptorBase; |
---|
2382 | |
---|
2383 | EdgeNotifierProxy(const AdaptorBase& _adaptor) |
---|
2384 | : Parent(), adaptor(&_adaptor) { |
---|
2385 | } |
---|
2386 | |
---|
2387 | virtual ~EdgeNotifierProxy() { |
---|
2388 | if (Parent::attached()) { |
---|
2389 | Parent::detach(); |
---|
2390 | } |
---|
2391 | } |
---|
2392 | |
---|
2393 | void setNotifier(typename Graph::EdgeNotifier& graph_notifier) { |
---|
2394 | Parent::attach(graph_notifier); |
---|
2395 | } |
---|
2396 | |
---|
2397 | |
---|
2398 | protected: |
---|
2399 | |
---|
2400 | virtual void add(const GraphEdge& ge) { |
---|
2401 | adaptor->notifier(Edge()).add(AdaptorBase::edge(ge)); |
---|
2402 | } |
---|
2403 | virtual void add(const std::vector<GraphEdge>& ge) { |
---|
2404 | std::vector<Edge> edges; |
---|
2405 | for (int i = 0; i < int(ge.size()); ++i) { |
---|
2406 | edges.push_back(AdaptorBase::edge(ge[i])); |
---|
2407 | } |
---|
2408 | adaptor->notifier(Edge()).add(edges); |
---|
2409 | } |
---|
2410 | virtual void erase(const GraphEdge& ge) { |
---|
2411 | adaptor->notifier(Edge()).erase(AdaptorBase::edge(ge)); |
---|
2412 | } |
---|
2413 | virtual void erase(const std::vector<GraphEdge>& ge) { |
---|
2414 | std::vector<Edge> edges; |
---|
2415 | for (int i = 0; i < int(ge.size()); ++i) { |
---|
2416 | edges.push_back(AdaptorBase::edge(ge[i])); |
---|
2417 | } |
---|
2418 | adaptor->notifier(Edge()).erase(edges); |
---|
2419 | } |
---|
2420 | virtual void build() { |
---|
2421 | std::vector<Edge> edges; |
---|
2422 | const typename Parent::Notifier* nf = Parent::notifier(); |
---|
2423 | GraphEdge it; |
---|
2424 | for (nf->first(it); it != INVALID; nf->next(it)) { |
---|
2425 | edges.push_back(AdaptorBase::Parent::edge(it)); |
---|
2426 | } |
---|
2427 | adaptor->notifier(Edge()).add(edges); |
---|
2428 | } |
---|
2429 | virtual void clear() { |
---|
2430 | std::vector<Edge> edges; |
---|
2431 | const typename Parent::Notifier* nf = Parent::notifier(); |
---|
2432 | GraphEdge it; |
---|
2433 | for (nf->first(it); it != INVALID; nf->next(it)) { |
---|
2434 | edges.push_back(AdaptorBase::Parent::edge(it)); |
---|
2435 | } |
---|
2436 | adaptor->notifier(Edge()).erase(edges); |
---|
2437 | } |
---|
2438 | |
---|
2439 | const AdaptorBase* adaptor; |
---|
2440 | }; |
---|
2441 | |
---|
2442 | |
---|
2443 | mutable NodeNotifier node_notifier; |
---|
2444 | mutable EdgeNotifier edge_notifier; |
---|
2445 | |
---|
2446 | NodeNotifierProxy node_notifier_proxy; |
---|
2447 | EdgeNotifierProxy edge_notifier_proxy; |
---|
2448 | |
---|
2449 | }; |
---|
2450 | |
---|
2451 | /// \ingroup graph_adaptors |
---|
2452 | /// |
---|
2453 | /// \brief Split graph adaptor class |
---|
2454 | /// |
---|
2455 | /// This is an graph adaptor which splits all node into an in-node |
---|
2456 | /// and an out-node. Formaly, the adaptor replaces each \f$ u \f$ |
---|
2457 | /// node in the graph with two node, \f$ u_{in} \f$ node and |
---|
2458 | /// \f$ u_{out} \f$ node. If there is an \f$ (v, u) \f$ edge in the |
---|
2459 | /// original graph the new target of the edge will be \f$ u_{in} \f$ and |
---|
2460 | /// similarly the source of the original \f$ (u, v) \f$ edge will be |
---|
2461 | /// \f$ u_{out} \f$. The adaptor will add for each node in the |
---|
2462 | /// original graph an additional edge which will connect |
---|
2463 | /// \f$ (u_{in}, u_{out}) \f$. |
---|
2464 | /// |
---|
2465 | /// The aim of this class is to run algorithm with node costs if the |
---|
2466 | /// algorithm can use directly just edge costs. In this case we should use |
---|
2467 | /// a \c SplitGraphAdaptor and set the node cost of the graph to the |
---|
2468 | /// bind edge in the adapted graph. |
---|
2469 | /// |
---|
2470 | /// By example a maximum flow algoritm can compute how many edge |
---|
2471 | /// disjoint paths are in the graph. But we would like to know how |
---|
2472 | /// many node disjoint paths are in the graph. First we have to |
---|
2473 | /// adapt the graph with the \c SplitGraphAdaptor. Then run the flow |
---|
2474 | /// algorithm on the adapted graph. The bottleneck of the flow will |
---|
2475 | /// be the bind edges which bounds the flow with the count of the |
---|
2476 | /// node disjoint paths. |
---|
2477 | /// |
---|
2478 | ///\code |
---|
2479 | /// |
---|
2480 | /// typedef SplitGraphAdaptor<SmartGraph> SGraph; |
---|
2481 | /// |
---|
2482 | /// SGraph sgraph(graph); |
---|
2483 | /// |
---|
2484 | /// typedef ConstMap<SGraph::Edge, int> SCapacity; |
---|
2485 | /// SCapacity scapacity(1); |
---|
2486 | /// |
---|
2487 | /// SGraph::EdgeMap<int> sflow(sgraph); |
---|
2488 | /// |
---|
2489 | /// Preflow<SGraph, SCapacity> |
---|
2490 | /// spreflow(sgraph, scapacity, |
---|
2491 | /// SGraph::outNode(source), SGraph::inNode(target)); |
---|
2492 | /// |
---|
2493 | /// spreflow.run(); |
---|
2494 | /// |
---|
2495 | ///\endcode |
---|
2496 | /// |
---|
2497 | /// The result of the mamixum flow on the original graph |
---|
2498 | /// shows the next figure: |
---|
2499 | /// |
---|
2500 | /// \image html edge_disjoint.png |
---|
2501 | /// \image latex edge_disjoint.eps "Edge disjoint paths" width=\textwidth |
---|
2502 | /// |
---|
2503 | /// And the maximum flow on the adapted graph: |
---|
2504 | /// |
---|
2505 | /// \image html node_disjoint.png |
---|
2506 | /// \image latex node_disjoint.eps "Node disjoint paths" width=\textwidth |
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2507 | /// |
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2508 | /// The second solution contains just 3 disjoint paths while the first 4. |
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2509 | /// The full code can be found in the \ref disjoint_paths_demo.cc demo file. |
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2510 | /// |
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2511 | /// This graph adaptor is fully conform to the |
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2512 | /// \ref concepts::Graph "Graph" concept and |
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2513 | /// contains some additional member functions and types. The |
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2514 | /// documentation of some member functions may be found just in the |
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2515 | /// SplitGraphAdaptorBase class. |
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2516 | /// |
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2517 | /// \sa SplitGraphAdaptorBase |
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2518 | template <typename _Graph> |
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2519 | class SplitGraphAdaptor : public AlterableSplitGraphAdaptor<_Graph> { |
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2520 | public: |
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2521 | typedef AlterableSplitGraphAdaptor<_Graph> Parent; |
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2522 | |
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2523 | typedef typename Parent::Node Node; |
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2524 | typedef typename Parent::Edge Edge; |
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2525 | |
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2526 | /// \brief Constructor of the adaptor. |
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2527 | /// |
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2528 | /// Constructor of the adaptor. |
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2529 | SplitGraphAdaptor(_Graph& g) { |
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2530 | Parent::setGraph(g); |
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2531 | } |
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2532 | |
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2533 | /// \brief NodeMap combined from two original NodeMap |
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2534 | /// |
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2535 | /// This class adapt two of the original graph NodeMap to |
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2536 | /// get a node map on the adapted graph. |
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2537 | template <typename InNodeMap, typename OutNodeMap> |
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2538 | class CombinedNodeMap { |
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2539 | public: |
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2540 | |
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2541 | typedef Node Key; |
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2542 | typedef typename InNodeMap::Value Value; |
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2543 | |
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2544 | /// \brief Constructor |
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2545 | /// |
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2546 | /// Constructor. |
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2547 | CombinedNodeMap(InNodeMap& _inNodeMap, OutNodeMap& _outNodeMap) |
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2548 | : inNodeMap(_inNodeMap), outNodeMap(_outNodeMap) {} |
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2549 | |
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2550 | /// \brief The subscript operator. |
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2551 | /// |
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2552 | /// The subscript operator. |
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2553 | Value& operator[](const Key& key) { |
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2554 | if (Parent::inNode(key)) { |
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2555 | return inNodeMap[key]; |
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2556 | } else { |
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2557 | return outNodeMap[key]; |
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2558 | } |
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2559 | } |
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2560 | |
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2561 | /// \brief The const subscript operator. |
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2562 | /// |
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2563 | /// The const subscript operator. |
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2564 | Value operator[](const Key& key) const { |
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2565 | if (Parent::inNode(key)) { |
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2566 | return inNodeMap[key]; |
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2567 | } else { |
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2568 | return outNodeMap[key]; |
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2569 | } |
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2570 | } |
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2571 | |
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2572 | /// \brief The setter function of the map. |
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2573 | /// |
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2574 | /// The setter function of the map. |
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2575 | void set(const Key& key, const Value& value) { |
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2576 | if (Parent::inNode(key)) { |
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2577 | inNodeMap.set(key, value); |
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2578 | } else { |
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2579 | outNodeMap.set(key, value); |
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2580 | } |
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2581 | } |
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2582 | |
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2583 | private: |
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2584 | |
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2585 | InNodeMap& inNodeMap; |
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2586 | OutNodeMap& outNodeMap; |
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2587 | |
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2588 | }; |
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2589 | |
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2590 | |
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2591 | /// \brief Just gives back a combined node map. |
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2592 | /// |
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2593 | /// Just gives back a combined node map. |
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2594 | template <typename InNodeMap, typename OutNodeMap> |
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2595 | static CombinedNodeMap<InNodeMap, OutNodeMap> |
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2596 | combinedNodeMap(InNodeMap& in_map, OutNodeMap& out_map) { |
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2597 | return CombinedNodeMap<InNodeMap, OutNodeMap>(in_map, out_map); |
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2598 | } |
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2599 | |
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2600 | template <typename InNodeMap, typename OutNodeMap> |
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2601 | static CombinedNodeMap<const InNodeMap, OutNodeMap> |
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2602 | combinedNodeMap(const InNodeMap& in_map, OutNodeMap& out_map) { |
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2603 | return CombinedNodeMap<const InNodeMap, OutNodeMap>(in_map, out_map); |
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2604 | } |
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2605 | |
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2606 | template <typename InNodeMap, typename OutNodeMap> |
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2607 | static CombinedNodeMap<InNodeMap, const OutNodeMap> |
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2608 | combinedNodeMap(InNodeMap& in_map, const OutNodeMap& out_map) { |
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2609 | return CombinedNodeMap<InNodeMap, const OutNodeMap>(in_map, out_map); |
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2610 | } |
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2611 | |
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2612 | template <typename InNodeMap, typename OutNodeMap> |
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2613 | static CombinedNodeMap<const InNodeMap, const OutNodeMap> |
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2614 | combinedNodeMap(const InNodeMap& in_map, const OutNodeMap& out_map) { |
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2615 | return CombinedNodeMap<const InNodeMap, |
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2616 | const OutNodeMap>(in_map, out_map); |
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2617 | } |
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2618 | |
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2619 | /// \brief EdgeMap combined from an original EdgeMap and NodeMap |
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2620 | /// |
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2621 | /// This class adapt an original graph EdgeMap and NodeMap to |
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2622 | /// get an edge map on the adapted graph. |
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2623 | template <typename GraphEdgeMap, typename GraphNodeMap> |
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2624 | class CombinedEdgeMap { |
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2625 | public: |
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2626 | |
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2627 | typedef Edge Key; |
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2628 | typedef typename GraphEdgeMap::Value Value; |
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2629 | |
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2630 | /// \brief Constructor |
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2631 | /// |
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2632 | /// Constructor. |
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2633 | CombinedEdgeMap(GraphEdgeMap& _edge_map, GraphNodeMap& _node_map) |
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2634 | : edge_map(_edge_map), node_map(_node_map) {} |
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2635 | |
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2636 | /// \brief The subscript operator. |
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2637 | /// |
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2638 | /// The subscript operator. |
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2639 | void set(const Edge& edge, const Value& val) { |
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2640 | if (Parent::origEdge(edge)) { |
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2641 | edge_map.set(edge, val); |
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2642 | } else { |
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2643 | node_map.set(edge, val); |
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2644 | } |
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2645 | } |
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2646 | |
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2647 | /// \brief The const subscript operator. |
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2648 | /// |
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2649 | /// The const subscript operator. |
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2650 | Value operator[](const Key& edge) const { |
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2651 | if (Parent::origEdge(edge)) { |
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2652 | return edge_map[edge]; |
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2653 | } else { |
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2654 | return node_map[edge]; |
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2655 | } |
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2656 | } |
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2657 | |
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2658 | /// \brief The const subscript operator. |
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2659 | /// |
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2660 | /// The const subscript operator. |
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2661 | Value& operator[](const Key& edge) { |
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2662 | if (Parent::origEdge(edge)) { |
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2663 | return edge_map[edge]; |
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2664 | } else { |
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2665 | return node_map[edge]; |
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2666 | } |
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2667 | } |
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2668 | |
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2669 | private: |
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2670 | GraphEdgeMap& edge_map; |
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2671 | GraphNodeMap& node_map; |
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2672 | }; |
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2673 | |
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2674 | /// \brief Just gives back a combined edge map. |
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2675 | /// |
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2676 | /// Just gives back a combined edge map. |
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2677 | template <typename GraphEdgeMap, typename GraphNodeMap> |
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2678 | static CombinedEdgeMap<GraphEdgeMap, GraphNodeMap> |
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2679 | combinedEdgeMap(GraphEdgeMap& edge_map, GraphNodeMap& node_map) { |
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2680 | return CombinedEdgeMap<GraphEdgeMap, GraphNodeMap>(edge_map, node_map); |
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2681 | } |
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2682 | |
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2683 | template <typename GraphEdgeMap, typename GraphNodeMap> |
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2684 | static CombinedEdgeMap<const GraphEdgeMap, GraphNodeMap> |
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2685 | combinedEdgeMap(const GraphEdgeMap& edge_map, GraphNodeMap& node_map) { |
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2686 | return CombinedEdgeMap<const GraphEdgeMap, |
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2687 | GraphNodeMap>(edge_map, node_map); |
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2688 | } |
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2689 | |
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2690 | template <typename GraphEdgeMap, typename GraphNodeMap> |
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2691 | static CombinedEdgeMap<GraphEdgeMap, const GraphNodeMap> |
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2692 | combinedEdgeMap(GraphEdgeMap& edge_map, const GraphNodeMap& node_map) { |
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2693 | return CombinedEdgeMap<GraphEdgeMap, |
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2694 | const GraphNodeMap>(edge_map, node_map); |
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2695 | } |
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2696 | |
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2697 | template <typename GraphEdgeMap, typename GraphNodeMap> |
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2698 | static CombinedEdgeMap<const GraphEdgeMap, const GraphNodeMap> |
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2699 | combinedEdgeMap(const GraphEdgeMap& edge_map, |
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2700 | const GraphNodeMap& node_map) { |
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2701 | return CombinedEdgeMap<const GraphEdgeMap, |
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2702 | const GraphNodeMap>(edge_map, node_map); |
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2703 | } |
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2704 | |
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2705 | }; |
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2706 | |
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2707 | /// \brief Just gives back a split graph adaptor |
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2708 | /// |
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2709 | /// Just gives back a split graph adaptor |
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2710 | template<typename Graph> |
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2711 | SplitGraphAdaptor<Graph> |
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2712 | splitGraphAdaptor(const Graph& graph) { |
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2713 | return SplitGraphAdaptor<Graph>(graph); |
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2714 | } |
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2715 | |
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2716 | |
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2717 | } //namespace lemon |
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2718 | |
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2719 | #endif //LEMON_GRAPH_ADAPTOR_H |
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2720 | |
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