1 | /* -*- C++ -*- |
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2 | * lemon/concept/graph_component.h - Part of LEMON, a generic C++ optimization library |
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3 | * |
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4 | * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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5 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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6 | * |
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7 | * Permission to use, modify and distribute this software is granted |
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8 | * provided that this copyright notice appears in all copies. For |
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9 | * precise terms see the accompanying LICENSE file. |
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10 | * |
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11 | * This software is provided "AS IS" with no warranty of any kind, |
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12 | * express or implied, and with no claim as to its suitability for any |
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13 | * purpose. |
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14 | * |
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15 | */ |
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16 | |
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17 | ///\ingroup graph_concepts |
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18 | ///\file |
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19 | ///\brief The graph components. |
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20 | |
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21 | |
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22 | #ifndef LEMON_CONCEPT_GRAPH_COMPONENT_H |
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23 | #define LEMON_CONCEPT_GRAPH_COMPONENT_H |
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24 | |
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25 | #include <lemon/invalid.h> |
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26 | #include <lemon/concept/maps.h> |
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27 | |
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28 | #include <lemon/bits/alteration_notifier.h> |
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29 | |
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30 | namespace lemon { |
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31 | namespace concept { |
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32 | |
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33 | /**************** Graph iterator concepts ****************/ |
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34 | |
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35 | /// Skeleton class for graph Node and Edge types |
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36 | |
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37 | /// This class describes the interface of Node and Edge (and UndirEdge |
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38 | /// in undirected graphs) subtypes of graph types. |
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39 | /// |
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40 | /// \note This class is a template class so that we can use it to |
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41 | /// create graph skeleton classes. The reason for this is than Node |
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42 | /// and Edge types should \em not derive from the same base class. |
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43 | /// For Node you should instantiate it with character 'n' and for Edge |
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44 | /// with 'e'. |
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45 | |
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46 | #ifndef DOXYGEN |
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47 | template <char _selector = '0'> |
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48 | #endif |
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49 | class GraphItem { |
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50 | public: |
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51 | /// Default constructor. |
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52 | |
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53 | /// \warning The default constructor is not required to set |
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54 | /// the item to some well-defined value. So you should consider it |
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55 | /// as uninitialized. |
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56 | GraphItem() {} |
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57 | /// Copy constructor. |
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58 | |
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59 | /// Copy constructor. |
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60 | /// |
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61 | GraphItem(GraphItem const&) {} |
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62 | /// Invalid constructor \& conversion. |
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63 | |
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64 | /// This constructor initializes the item to be invalid. |
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65 | /// \sa Invalid for more details. |
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66 | GraphItem(Invalid) {} |
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67 | /// Assign operator for nodes. |
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68 | |
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69 | /// The nodes are assignable. |
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70 | /// |
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71 | GraphItem& operator=(GraphItem const&) { return *this; } |
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72 | /// Equality operator. |
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73 | |
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74 | /// Two iterators are equal if and only if they represents the |
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75 | /// same node in the graph or both are invalid. |
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76 | bool operator==(GraphItem) const { return false; } |
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77 | /// Inequality operator. |
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78 | |
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79 | /// \sa operator==(const Node& n) |
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80 | /// |
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81 | bool operator!=(GraphItem) const { return false; } |
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82 | |
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83 | /// Artificial ordering operator. |
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84 | |
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85 | /// To allow the use of graph descriptors as key type in std::map or |
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86 | /// similar associative container we require this. |
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87 | /// |
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88 | /// \note This operator only have to define some strict ordering of |
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89 | /// the items; this order has nothing to do with the iteration |
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90 | /// ordering of the items. |
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91 | /// |
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92 | /// \bug This is a technical requirement. Do we really need this? |
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93 | bool operator<(GraphItem) const { return false; } |
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94 | |
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95 | template<typename _GraphItem> |
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96 | struct Constraints { |
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97 | void constraints() { |
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98 | _GraphItem i1; |
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99 | _GraphItem i2 = i1; |
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100 | _GraphItem i3 = INVALID; |
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101 | |
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102 | i1 = i2 = i3; |
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103 | |
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104 | bool b; |
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105 | // b = (ia == ib) && (ia != ib) && (ia < ib); |
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106 | b = (ia == ib) && (ia != ib); |
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107 | b = (ia == INVALID) && (ib != INVALID); |
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108 | // b = (ia < ib); |
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109 | } |
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110 | |
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111 | const _GraphItem &ia; |
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112 | const _GraphItem &ib; |
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113 | }; |
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114 | }; |
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115 | |
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116 | /// A type describing the concept of graph node |
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117 | |
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118 | /// This is an instantiation of \ref GraphItem which can be used as a |
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119 | /// Node subtype in graph skeleton definitions |
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120 | typedef GraphItem<'n'> GraphNode; |
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121 | |
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122 | /// A type describing the concept of graph edge |
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123 | |
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124 | /// This is an instantiation of \ref GraphItem which can be used as a |
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125 | /// Edge subtype in graph skeleton definitions |
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126 | typedef GraphItem<'e'> GraphEdge; |
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127 | |
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128 | |
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129 | /**************** Basic features of graphs ****************/ |
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130 | |
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131 | /// An empty base graph class. |
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132 | |
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133 | /// This class provides the minimal set of features needed for a graph |
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134 | /// structure. All graph concepts have to be conform to this base |
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135 | /// graph. |
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136 | /// |
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137 | /// \bug This is not true. The minimal graph concept is the |
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138 | /// BaseIterableGraphComponent. |
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139 | |
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140 | class BaseGraphComponent { |
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141 | public: |
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142 | |
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143 | typedef BaseGraphComponent Graph; |
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144 | |
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145 | /// Node class of the graph. |
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146 | |
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147 | /// This class represents the Nodes of the graph. |
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148 | /// |
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149 | typedef GraphItem<'n'> Node; |
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150 | |
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151 | /// Edge class of the graph. |
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152 | |
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153 | /// This class represents the Edges of the graph. |
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154 | /// |
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155 | typedef GraphItem<'e'> Edge; |
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156 | |
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157 | ///Gives back the target node of an edge. |
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158 | |
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159 | ///Gives back the target node of an edge. |
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160 | /// |
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161 | Node target(const Edge&) const { return INVALID;} |
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162 | |
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163 | ///Gives back the source node of an edge. |
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164 | |
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165 | ///Gives back the source node of an edge. |
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166 | /// |
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167 | Node source(const Edge&) const { return INVALID;} |
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168 | |
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169 | |
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170 | template <typename _Graph> |
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171 | struct Constraints { |
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172 | typedef typename _Graph::Node Node; |
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173 | typedef typename _Graph::Edge Edge; |
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174 | |
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175 | void constraints() { |
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176 | checkConcept<GraphItem<'n'>, Node>(); |
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177 | checkConcept<GraphItem<'e'>, Edge>(); |
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178 | { |
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179 | Node n; |
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180 | Edge e; |
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181 | n = graph.source(e); |
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182 | n = graph.target(e); |
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183 | } |
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184 | } |
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185 | |
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186 | const _Graph& graph; |
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187 | }; |
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188 | }; |
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189 | |
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190 | /// An empty iterable base graph class. |
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191 | |
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192 | /// This class provides beside the core graph features |
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193 | /// core iterable interface for the graph structure. |
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194 | /// Most of the base graphs should be conform to this concept. |
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195 | |
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196 | class BaseIterableGraphComponent : virtual public BaseGraphComponent { |
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197 | public: |
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198 | |
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199 | typedef BaseGraphComponent::Node Node; |
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200 | typedef BaseGraphComponent::Edge Edge; |
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201 | |
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202 | /// Gives back the first Node in the iterating order. |
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203 | |
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204 | /// Gives back the first Node in the iterating order. |
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205 | /// |
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206 | void first(Node&) const {} |
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207 | |
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208 | /// Gives back the next Node in the iterating order. |
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209 | |
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210 | /// Gives back the next Node in the iterating order. |
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211 | /// |
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212 | void next(Node&) const {} |
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213 | |
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214 | /// Gives back the first Edge in the iterating order. |
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215 | |
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216 | /// Gives back the first Edge in the iterating order. |
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217 | /// |
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218 | void first(Edge&) const {} |
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219 | /// Gives back the next Edge in the iterating order. |
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220 | |
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221 | /// Gives back the next Edge in the iterating order. |
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222 | /// |
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223 | void next(Edge&) const {} |
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224 | |
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225 | |
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226 | /// Gives back the first of the Edges point to the given Node. |
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227 | |
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228 | /// Gives back the first of the Edges point to the given Node. |
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229 | /// |
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230 | void firstIn(Edge&, const Node&) const {} |
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231 | |
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232 | /// Gives back the next of the Edges points to the given Node. |
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233 | |
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234 | |
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235 | /// Gives back the next of the Edges points to the given Node. |
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236 | /// |
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237 | void nextIn(Edge&) const {} |
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238 | |
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239 | /// Gives back the first of the Edges start from the given Node. |
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240 | |
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241 | /// Gives back the first of the Edges start from the given Node. |
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242 | /// |
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243 | void firstOut(Edge&, const Node&) const {} |
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244 | |
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245 | /// Gives back the next of the Edges start from the given Node. |
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246 | |
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247 | /// Gives back the next of the Edges start from the given Node. |
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248 | /// |
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249 | void nextOut(Edge&) const {} |
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250 | |
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251 | |
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252 | template <typename _Graph> |
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253 | struct Constraints { |
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254 | |
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255 | void constraints() { |
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256 | checkConcept< BaseGraphComponent, _Graph >(); |
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257 | typename _Graph::Node node; |
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258 | typename _Graph::Edge edge; |
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259 | { |
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260 | graph.first(node); |
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261 | graph.next(node); |
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262 | } |
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263 | { |
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264 | graph.first(edge); |
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265 | graph.next(edge); |
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266 | } |
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267 | { |
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268 | graph.firstIn(edge, node); |
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269 | graph.nextIn(edge); |
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270 | } |
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271 | { |
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272 | graph.firstOut(edge, node); |
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273 | graph.nextOut(edge); |
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274 | } |
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275 | } |
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276 | |
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277 | const _Graph& graph; |
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278 | }; |
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279 | }; |
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280 | |
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281 | /// An empty idable base graph class. |
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282 | |
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283 | /// This class provides beside the core graph features |
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284 | /// core id functions for the graph structure. |
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285 | /// The most of the base graphs should be conform to this concept. |
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286 | /// The id's are unique and immutable. |
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287 | class IDableGraphComponent : virtual public BaseGraphComponent { |
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288 | public: |
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289 | |
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290 | typedef BaseGraphComponent::Node Node; |
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291 | typedef BaseGraphComponent::Edge Edge; |
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292 | |
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293 | /// Gives back an unique integer id for the Node. |
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294 | |
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295 | /// Gives back an unique integer id for the Node. |
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296 | /// |
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297 | int id(const Node&) const { return -1;} |
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298 | |
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299 | /// \brief Gives back the node by the unique id. |
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300 | /// |
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301 | /// Gives back the node by the unique id. |
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302 | /// If the graph does not contain node with the given id |
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303 | /// then the result of the function is undetermined. |
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304 | Node fromId(int , Node) const { return INVALID;} |
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305 | |
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306 | /// \brief Gives back an unique integer id for the Edge. |
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307 | /// |
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308 | /// Gives back an unique integer id for the Edge. |
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309 | /// |
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310 | int id(const Edge&) const { return -1;} |
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311 | |
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312 | /// \brief Gives back the edge by the unique id. |
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313 | /// |
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314 | /// Gives back the edge by the unique id. |
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315 | /// If the graph does not contain edge with the given id |
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316 | /// then the result of the function is undetermined. |
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317 | Edge fromId(int, Edge) const { return INVALID;} |
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318 | |
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319 | template <typename _Graph> |
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320 | struct Constraints { |
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321 | |
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322 | void constraints() { |
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323 | checkConcept< BaseGraphComponent, _Graph >(); |
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324 | typename _Graph::Node node; |
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325 | int nid = graph.id(node); |
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326 | nid = graph.id(node); |
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327 | node = graph.fromId(nid, Node()); |
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328 | typename _Graph::Edge edge; |
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329 | int eid = graph.id(edge); |
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330 | eid = graph.id(edge); |
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331 | edge = graph.fromId(eid, Edge()); |
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332 | } |
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333 | |
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334 | const _Graph& graph; |
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335 | }; |
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336 | }; |
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337 | |
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338 | |
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339 | /// An empty max-idable base graph class. |
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340 | |
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341 | /// This class provides beside the core graph features |
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342 | /// core max id functions for the graph structure. |
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343 | /// The most of the base graphs should be conform to this concept. |
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344 | /// The id's are unique and immutable. |
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345 | class MaxIDableGraphComponent : virtual public BaseGraphComponent { |
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346 | public: |
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347 | |
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348 | /// Gives back an integer greater or equal to the maximum Node id. |
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349 | |
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350 | /// Gives back an integer greater or equal to the maximum Node id. |
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351 | /// |
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352 | int maxId(Node = INVALID) const { return -1;} |
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353 | |
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354 | /// Gives back an integer greater or equal to the maximum Edge id. |
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355 | |
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356 | /// Gives back an integer greater or equal to the maximum Edge id. |
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357 | /// |
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358 | int maxId(Edge = INVALID) const { return -1;} |
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359 | |
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360 | template <typename _Graph> |
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361 | struct Constraints { |
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362 | |
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363 | void constraints() { |
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364 | checkConcept<BaseGraphComponent, _Graph>(); |
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365 | int nid = graph.maxId(typename _Graph::Node()); |
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366 | ignore_unused_variable_warning(nid); |
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367 | int eid = graph.maxId(typename _Graph::Edge()); |
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368 | ignore_unused_variable_warning(eid); |
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369 | } |
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370 | |
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371 | const _Graph& graph; |
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372 | }; |
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373 | }; |
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374 | |
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375 | /// An empty extendable base graph class. |
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376 | |
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377 | /// This class provides beside the core graph features |
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378 | /// core graph extend interface for the graph structure. |
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379 | /// The most of the base graphs should be conform to this concept. |
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380 | class BaseExtendableGraphComponent : virtual public BaseGraphComponent { |
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381 | public: |
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382 | |
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383 | typedef BaseGraphComponent::Node Node; |
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384 | typedef BaseGraphComponent::Edge Edge; |
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385 | |
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386 | /// Adds a new Node to the graph. |
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387 | |
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388 | /// Adds a new Node to the graph. |
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389 | /// |
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390 | Node addNode() { |
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391 | return INVALID; |
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392 | } |
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393 | |
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394 | /// Adds a new Edge connects the two Nodes to the graph. |
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395 | |
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396 | /// Adds a new Edge connects the two Nodes to the graph. |
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397 | /// |
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398 | Edge addEdge(const Node&, const Node&) { |
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399 | return INVALID; |
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400 | } |
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401 | |
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402 | template <typename _Graph> |
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403 | struct Constraints { |
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404 | void constraints() { |
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405 | checkConcept<BaseGraphComponent, _Graph >(); |
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406 | typename _Graph::Node node_a, node_b; |
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407 | node_a = graph.addNode(); |
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408 | node_b = graph.addNode(); |
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409 | typename _Graph::Edge edge; |
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410 | edge = graph.addEdge(node_a, node_b); |
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411 | } |
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412 | |
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413 | _Graph& graph; |
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414 | }; |
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415 | }; |
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416 | |
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417 | /// An empty erasable base graph class. |
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418 | |
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419 | /// This class provides beside the core graph features |
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420 | /// core erase functions for the graph structure. |
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421 | /// The most of the base graphs should be conform to this concept. |
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422 | class BaseErasableGraphComponent : virtual public BaseGraphComponent { |
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423 | public: |
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424 | |
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425 | typedef BaseGraphComponent::Node Node; |
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426 | typedef BaseGraphComponent::Edge Edge; |
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427 | |
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428 | /// Erase a Node from the graph. |
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429 | |
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430 | /// Erase a Node from the graph. This function should not |
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431 | /// erase edges connecting to the Node. |
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432 | void erase(const Node&) {} |
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433 | |
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434 | /// Erase an Edge from the graph. |
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435 | |
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436 | /// Erase an Edge from the graph. |
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437 | /// |
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438 | void erase(const Edge&) {} |
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439 | |
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440 | template <typename _Graph> |
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441 | struct Constraints { |
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442 | void constraints() { |
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443 | checkConcept<BaseGraphComponent, _Graph>(); |
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444 | typename _Graph::Node node; |
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445 | graph.erase(node); |
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446 | typename _Graph::Edge edge; |
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447 | graph.erase(edge); |
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448 | } |
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449 | |
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450 | _Graph& graph; |
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451 | }; |
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452 | }; |
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453 | |
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454 | /// An empty clearable base graph class. |
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455 | |
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456 | /// This class provides beside the core graph features |
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457 | /// core clear functions for the graph structure. |
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458 | /// The most of the base graphs should be conform to this concept. |
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459 | class ClearableGraphComponent : virtual public BaseGraphComponent { |
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460 | public: |
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461 | |
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462 | /// Erase all the Nodes and Edges from the graph. |
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463 | |
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464 | /// Erase all the Nodes and Edges from the graph. |
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465 | /// |
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466 | void clear() {} |
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467 | |
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468 | template <typename _Graph> |
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469 | struct Constraints { |
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470 | void constraints() { |
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471 | checkConcept<BaseGraphComponent, _Graph>(); |
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472 | graph.clear(); |
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473 | } |
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474 | |
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475 | _Graph graph; |
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476 | }; |
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477 | }; |
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478 | |
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479 | |
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480 | /// Skeleton class for graph NodeIt and EdgeIt |
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481 | |
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482 | /// Skeleton class for graph NodeIt and EdgeIt. |
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483 | /// |
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484 | template <typename _Graph, typename _Item> |
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485 | class GraphIterator : public _Item { |
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486 | public: |
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487 | /// \todo Don't we need the Item type as typedef? |
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488 | |
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489 | /// Default constructor. |
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490 | |
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491 | /// @warning The default constructor sets the iterator |
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492 | /// to an undefined value. |
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493 | GraphIterator() {} |
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494 | /// Copy constructor. |
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495 | |
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496 | /// Copy constructor. |
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497 | /// |
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498 | GraphIterator(GraphIterator const&) {} |
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499 | /// Sets the iterator to the first item. |
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500 | |
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501 | /// Sets the iterator to the first item of \c the graph. |
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502 | /// |
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503 | explicit GraphIterator(const _Graph&) {} |
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504 | /// Invalid constructor \& conversion. |
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505 | |
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506 | /// This constructor initializes the item to be invalid. |
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507 | /// \sa Invalid for more details. |
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508 | GraphIterator(Invalid) {} |
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509 | /// Assign operator for items. |
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510 | |
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511 | /// The items are assignable. |
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512 | /// |
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513 | GraphIterator& operator=(GraphIterator const&) { return *this; } |
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514 | /// Next item. |
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515 | |
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516 | /// Assign the iterator to the next item. |
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517 | /// |
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518 | GraphIterator& operator++() { return *this; } |
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519 | // Node operator*() const { return INVALID; } |
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520 | /// Equality operator |
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521 | |
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522 | /// Two iterators are equal if and only if they point to the |
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523 | /// same object or both are invalid. |
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524 | bool operator==(const GraphIterator&) const { return true;} |
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525 | /// Inequality operator |
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526 | |
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527 | /// \sa operator==(Node n) |
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528 | /// |
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529 | bool operator!=(const GraphIterator&) const { return true;} |
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530 | |
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531 | template<typename _GraphIterator> |
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532 | struct Constraints { |
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533 | void constraints() { |
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534 | // checkConcept< Item, _GraphIterator >(); |
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535 | _GraphIterator it1(g); |
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536 | |
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537 | /// \todo Do we need NodeIt(Node) kind of constructor? |
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538 | // _GraphIterator it2(bj); |
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539 | _GraphIterator it2; |
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540 | |
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541 | it2 = ++it1; |
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542 | ++it2 = it1; |
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543 | ++(++it1); |
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544 | /// \bug This should be: is_base_and_derived<BaseItem, _GraphIterator> |
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545 | _Item bi = it1; |
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546 | bi = it2; |
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547 | } |
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548 | _Graph& g; |
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549 | }; |
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550 | }; |
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551 | |
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552 | /// Skeleton class for graph InEdgeIt and OutEdgeIt |
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553 | |
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554 | /// \note Because InEdgeIt and OutEdgeIt may not inherit from the same |
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555 | /// base class, the _selector is a additional template parameter. For |
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556 | /// InEdgeIt you should instantiate it with character 'i' and for |
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557 | /// OutEdgeIt with 'o'. |
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558 | /// \todo Is this a good name for this concept? |
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559 | template <typename Graph, |
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560 | typename Edge = typename Graph::Edge, |
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561 | char _selector = '0'> |
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562 | class GraphIncIterator : public Edge { |
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563 | public: |
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564 | /// Default constructor. |
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565 | |
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566 | /// @warning The default constructor sets the iterator |
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567 | /// to an undefined value. |
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568 | GraphIncIterator() {} |
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569 | /// Copy constructor. |
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570 | |
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571 | /// Copy constructor. |
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572 | /// |
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573 | GraphIncIterator(GraphIncIterator const& gi) :Edge(gi) {} |
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574 | /// Sets the iterator to the first edge incoming into or outgoing |
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575 | /// from the node. |
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576 | |
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577 | /// Sets the iterator to the first edge incoming into or outgoing |
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578 | /// from the node. |
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579 | /// |
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580 | explicit GraphIncIterator(const Graph&, const typename Graph::Node&) {} |
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581 | /// Invalid constructor \& conversion. |
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582 | |
---|
583 | /// This constructor initializes the item to be invalid. |
---|
584 | /// \sa Invalid for more details. |
---|
585 | GraphIncIterator(Invalid) {} |
---|
586 | /// Assign operator for nodes. |
---|
587 | |
---|
588 | /// The nodes are assignable. |
---|
589 | /// |
---|
590 | GraphIncIterator& operator=(GraphIncIterator const&) { return *this; } |
---|
591 | /// Next edge. |
---|
592 | |
---|
593 | /// Assign the iterator to the next node. |
---|
594 | /// |
---|
595 | GraphIncIterator& operator++() { return *this; } |
---|
596 | |
---|
597 | // Node operator*() const { return INVALID; } |
---|
598 | |
---|
599 | /// Equality operator |
---|
600 | |
---|
601 | /// Two iterators are equal if and only if they point to the |
---|
602 | /// same object or both are invalid. |
---|
603 | bool operator==(const GraphIncIterator&) const { return true;} |
---|
604 | |
---|
605 | /// Inequality operator |
---|
606 | |
---|
607 | /// \sa operator==(Node n) |
---|
608 | /// |
---|
609 | bool operator!=(const GraphIncIterator&) const { return true;} |
---|
610 | |
---|
611 | template <typename _GraphIncIterator> |
---|
612 | struct Constraints { |
---|
613 | typedef typename Graph::Node Node; |
---|
614 | void constraints() { |
---|
615 | checkConcept<GraphItem<'e'>, _GraphIncIterator>(); |
---|
616 | _GraphIncIterator it1(graph, node); |
---|
617 | /// \todo Do we need OutEdgeIt(Edge) kind of constructor? |
---|
618 | // _GraphIncIterator it2(edge); |
---|
619 | _GraphIncIterator it2; |
---|
620 | |
---|
621 | it2 = ++it1; |
---|
622 | ++it2 = it1; |
---|
623 | ++(++it1); |
---|
624 | Edge e = it1; |
---|
625 | e = it2; |
---|
626 | |
---|
627 | const_constraits(); |
---|
628 | } |
---|
629 | |
---|
630 | void const_constraits() { |
---|
631 | Node n = graph.baseNode(it); |
---|
632 | n = graph.runningNode(it); |
---|
633 | } |
---|
634 | |
---|
635 | Edge edge; |
---|
636 | Node node; |
---|
637 | Graph graph; |
---|
638 | _GraphIncIterator it; |
---|
639 | }; |
---|
640 | }; |
---|
641 | |
---|
642 | |
---|
643 | /// An empty iterable base graph class. |
---|
644 | |
---|
645 | /// This class provides beside the core graph features |
---|
646 | /// iterator based iterable interface for the graph structure. |
---|
647 | /// This concept is part of the StaticGraphConcept. |
---|
648 | class IterableGraphComponent : virtual public BaseGraphComponent { |
---|
649 | |
---|
650 | public: |
---|
651 | |
---|
652 | typedef IterableGraphComponent Graph; |
---|
653 | |
---|
654 | typedef BaseGraphComponent::Node Node; |
---|
655 | typedef BaseGraphComponent::Edge Edge; |
---|
656 | |
---|
657 | /// This iterator goes through each node. |
---|
658 | |
---|
659 | /// This iterator goes through each node. |
---|
660 | /// |
---|
661 | typedef GraphIterator<Graph, Node> NodeIt; |
---|
662 | /// This iterator goes through each node. |
---|
663 | |
---|
664 | /// This iterator goes through each node. |
---|
665 | /// |
---|
666 | typedef GraphIterator<Graph, Edge> EdgeIt; |
---|
667 | /// This iterator goes trough the incoming edges of a node. |
---|
668 | |
---|
669 | /// This iterator goes trough the \e inccoming edges of a certain node |
---|
670 | /// of a graph. |
---|
671 | typedef GraphIncIterator<Graph, Edge, 'i'> InEdgeIt; |
---|
672 | /// This iterator goes trough the outgoing edges of a node. |
---|
673 | |
---|
674 | /// This iterator goes trough the \e outgoing edges of a certain node |
---|
675 | /// of a graph. |
---|
676 | typedef GraphIncIterator<Graph, Edge, 'o'> OutEdgeIt; |
---|
677 | |
---|
678 | /// \brief The base node of the iterator. |
---|
679 | /// |
---|
680 | /// Gives back the base node of the iterator. |
---|
681 | /// It is always the target of the pointed edge. |
---|
682 | Node baseNode(const InEdgeIt&) const { return INVALID; } |
---|
683 | |
---|
684 | /// \brief The running node of the iterator. |
---|
685 | /// |
---|
686 | /// Gives back the running node of the iterator. |
---|
687 | /// It is always the source of the pointed edge. |
---|
688 | Node runningNode(const InEdgeIt&) const { return INVALID; } |
---|
689 | |
---|
690 | /// \brief The base node of the iterator. |
---|
691 | /// |
---|
692 | /// Gives back the base node of the iterator. |
---|
693 | /// It is always the source of the pointed edge. |
---|
694 | Node baseNode(const OutEdgeIt&) const { return INVALID; } |
---|
695 | |
---|
696 | /// \brief The running node of the iterator. |
---|
697 | /// |
---|
698 | /// Gives back the running node of the iterator. |
---|
699 | /// It is always the target of the pointed edge. |
---|
700 | Node runningNode(const OutEdgeIt&) const { return INVALID; } |
---|
701 | |
---|
702 | /// \brief The opposite node on the given edge. |
---|
703 | /// |
---|
704 | /// Gives back the opposite on the given edge. |
---|
705 | /// \todo It should not be here. |
---|
706 | Node oppositeNode(const Node&, const Edge&) const { return INVALID; } |
---|
707 | |
---|
708 | |
---|
709 | template <typename _Graph> |
---|
710 | struct Constraints { |
---|
711 | void constraints() { |
---|
712 | checkConcept< BaseGraphComponent, _Graph>(); |
---|
713 | |
---|
714 | checkConcept<GraphIterator<_Graph, typename _Graph::Edge>, |
---|
715 | typename _Graph::EdgeIt >(); |
---|
716 | checkConcept<GraphIterator<_Graph, typename _Graph::Node>, |
---|
717 | typename _Graph::NodeIt >(); |
---|
718 | checkConcept<GraphIncIterator<_Graph>, typename _Graph::InEdgeIt>(); |
---|
719 | checkConcept<GraphIncIterator<_Graph>, typename _Graph::OutEdgeIt>(); |
---|
720 | |
---|
721 | typename _Graph::Node n; |
---|
722 | typename _Graph::Edge e; |
---|
723 | n = graph.oppositeNode(n, e); |
---|
724 | } |
---|
725 | |
---|
726 | const _Graph& graph; |
---|
727 | |
---|
728 | }; |
---|
729 | }; |
---|
730 | |
---|
731 | /// An empty alteration notifier base graph class. |
---|
732 | |
---|
733 | /// This class provides beside the core graph features |
---|
734 | /// alteration notifier interface for the graph structure. |
---|
735 | /// This is an observer-notifier pattern. More Obsevers can |
---|
736 | /// be registered into the notifier and whenever an alteration |
---|
737 | /// occured in the graph all the observers will notified about it. |
---|
738 | class AlterableGraphComponent : virtual public BaseGraphComponent { |
---|
739 | public: |
---|
740 | |
---|
741 | /// The edge observer registry. |
---|
742 | typedef AlterationNotifier<Edge> EdgeNotifier; |
---|
743 | /// The node observer registry. |
---|
744 | typedef AlterationNotifier<Node> NodeNotifier; |
---|
745 | |
---|
746 | /// \brief Gives back the edge alteration notifier. |
---|
747 | /// |
---|
748 | /// Gives back the edge alteration notifier. |
---|
749 | EdgeNotifier getNotifier(Edge) const { |
---|
750 | return EdgeNotifier(); |
---|
751 | } |
---|
752 | |
---|
753 | /// \brief Gives back the node alteration notifier. |
---|
754 | /// |
---|
755 | /// Gives back the node alteration notifier. |
---|
756 | NodeNotifier getNotifier(Node) const { |
---|
757 | return NodeNotifier(); |
---|
758 | } |
---|
759 | |
---|
760 | }; |
---|
761 | |
---|
762 | |
---|
763 | /// Class describing the concept of graph maps |
---|
764 | |
---|
765 | /// This class describes the common interface of the graph maps |
---|
766 | /// (NodeMap, EdgeMap), that is \ref maps-page "maps" which can be used to |
---|
767 | /// associate data to graph descriptors (nodes or edges). |
---|
768 | template <typename Graph, typename Item, typename _Value> |
---|
769 | class GraphMap : public ReadWriteMap<Item, _Value> { |
---|
770 | protected: |
---|
771 | GraphMap() {} |
---|
772 | public: |
---|
773 | /// \brief Construct a new map. |
---|
774 | /// |
---|
775 | /// Construct a new map for the graph. |
---|
776 | explicit GraphMap(const Graph&) {} |
---|
777 | /// \brief Construct a new map with default value. |
---|
778 | /// |
---|
779 | /// Construct a new map for the graph and initalise the values. |
---|
780 | GraphMap(const Graph&, const _Value&) {} |
---|
781 | /// \brief Copy constructor. |
---|
782 | /// |
---|
783 | /// Copy Constructor. |
---|
784 | GraphMap(const GraphMap& gm) :ReadWriteMap<Item, _Value>(gm) {} |
---|
785 | |
---|
786 | /// \brief Assign operator. |
---|
787 | /// |
---|
788 | /// Assign operator. |
---|
789 | GraphMap& operator=(const GraphMap&) { return *this;} |
---|
790 | |
---|
791 | template<typename _Map> |
---|
792 | struct Constraints { |
---|
793 | void constraints() { |
---|
794 | checkConcept<ReadWriteMap<Item, _Value>, _Map >(); |
---|
795 | // Construction with a graph parameter |
---|
796 | _Map a(g); |
---|
797 | // Constructor with a graph and a default value parameter |
---|
798 | _Map a2(g,t); |
---|
799 | // Copy constructor. Do we need it? |
---|
800 | _Map b=c; |
---|
801 | // Copy operator. Do we need it? |
---|
802 | a=b; |
---|
803 | |
---|
804 | ignore_unused_variable_warning(a2); |
---|
805 | } |
---|
806 | |
---|
807 | const _Map &c; |
---|
808 | const Graph &g; |
---|
809 | const typename GraphMap::Value &t; |
---|
810 | }; |
---|
811 | |
---|
812 | }; |
---|
813 | |
---|
814 | /// An empty mappable base graph class. |
---|
815 | |
---|
816 | /// This class provides beside the core graph features |
---|
817 | /// map interface for the graph structure. |
---|
818 | /// This concept is part of the StaticGraphConcept. |
---|
819 | class MappableGraphComponent : virtual public BaseGraphComponent { |
---|
820 | public: |
---|
821 | |
---|
822 | typedef MappableGraphComponent Graph; |
---|
823 | |
---|
824 | typedef BaseGraphComponent::Node Node; |
---|
825 | typedef BaseGraphComponent::Edge Edge; |
---|
826 | |
---|
827 | /// ReadWrite map of the nodes. |
---|
828 | |
---|
829 | /// ReadWrite map of the nodes. |
---|
830 | /// |
---|
831 | template <typename _Value> |
---|
832 | class NodeMap : public GraphMap<Graph, Node, _Value> { |
---|
833 | private: |
---|
834 | NodeMap(); |
---|
835 | public: |
---|
836 | /// \brief Construct a new map. |
---|
837 | /// |
---|
838 | /// Construct a new map for the graph. |
---|
839 | /// \todo call the right parent class constructor |
---|
840 | explicit NodeMap(const Graph&) {} |
---|
841 | /// \brief Construct a new map with default value. |
---|
842 | /// |
---|
843 | /// Construct a new map for the graph and initalise the values. |
---|
844 | NodeMap(const Graph&, const _Value&) {} |
---|
845 | /// \brief Copy constructor. |
---|
846 | /// |
---|
847 | /// Copy Constructor. |
---|
848 | NodeMap(const NodeMap& nm) : GraphMap<Graph, Node, _Value>(nm) {} |
---|
849 | |
---|
850 | /// \brief Assign operator. |
---|
851 | /// |
---|
852 | /// Assign operator. |
---|
853 | NodeMap& operator=(const NodeMap&) { return *this;} |
---|
854 | |
---|
855 | }; |
---|
856 | |
---|
857 | /// ReadWrite map of the edges. |
---|
858 | |
---|
859 | /// ReadWrite map of the edges. |
---|
860 | /// |
---|
861 | template <typename _Value> |
---|
862 | class EdgeMap : public GraphMap<Graph, Edge, _Value> { |
---|
863 | private: |
---|
864 | EdgeMap(); |
---|
865 | public: |
---|
866 | /// \brief Construct a new map. |
---|
867 | /// |
---|
868 | /// Construct a new map for the graph. |
---|
869 | /// \todo call the right parent class constructor |
---|
870 | explicit EdgeMap(const Graph&) {} |
---|
871 | /// \brief Construct a new map with default value. |
---|
872 | /// |
---|
873 | /// Construct a new map for the graph and initalise the values. |
---|
874 | EdgeMap(const Graph&, const _Value&) {} |
---|
875 | /// \brief Copy constructor. |
---|
876 | /// |
---|
877 | /// Copy Constructor. |
---|
878 | EdgeMap(const EdgeMap& em) :GraphMap<Graph, Edge, _Value>(em) {} |
---|
879 | |
---|
880 | /// \brief Assign operator. |
---|
881 | /// |
---|
882 | /// Assign operator. |
---|
883 | EdgeMap& operator=(const EdgeMap&) { return *this;} |
---|
884 | |
---|
885 | }; |
---|
886 | |
---|
887 | template <typename _Graph> |
---|
888 | struct Constraints { |
---|
889 | |
---|
890 | struct Type { |
---|
891 | int value; |
---|
892 | Type() : value(0) {} |
---|
893 | Type(int _v) : value(_v) {} |
---|
894 | }; |
---|
895 | |
---|
896 | void constraints() { |
---|
897 | checkConcept<BaseGraphComponent, _Graph>(); |
---|
898 | { // int map test |
---|
899 | typedef typename _Graph::template NodeMap<int> IntNodeMap; |
---|
900 | checkConcept<GraphMap<_Graph, typename _Graph::Node, int>, |
---|
901 | IntNodeMap >(); |
---|
902 | } { // bool map test |
---|
903 | typedef typename _Graph::template NodeMap<bool> BoolNodeMap; |
---|
904 | checkConcept<GraphMap<_Graph, typename _Graph::Node, bool>, |
---|
905 | BoolNodeMap >(); |
---|
906 | } { // Type map test |
---|
907 | typedef typename _Graph::template NodeMap<Type> TypeNodeMap; |
---|
908 | checkConcept<GraphMap<_Graph, typename _Graph::Node, Type>, |
---|
909 | TypeNodeMap >(); |
---|
910 | } |
---|
911 | |
---|
912 | { // int map test |
---|
913 | typedef typename _Graph::template EdgeMap<int> IntEdgeMap; |
---|
914 | checkConcept<GraphMap<_Graph, typename _Graph::Edge, int>, |
---|
915 | IntEdgeMap >(); |
---|
916 | } { // bool map test |
---|
917 | typedef typename _Graph::template EdgeMap<bool> BoolEdgeMap; |
---|
918 | checkConcept<GraphMap<_Graph, typename _Graph::Edge, bool>, |
---|
919 | BoolEdgeMap >(); |
---|
920 | } { // Type map test |
---|
921 | typedef typename _Graph::template EdgeMap<Type> TypeEdgeMap; |
---|
922 | checkConcept<GraphMap<_Graph, typename _Graph::Edge, Type>, |
---|
923 | TypeEdgeMap >(); |
---|
924 | } |
---|
925 | } |
---|
926 | |
---|
927 | _Graph& graph; |
---|
928 | }; |
---|
929 | }; |
---|
930 | |
---|
931 | /// \brief An empty extendable extended graph class. |
---|
932 | /// |
---|
933 | /// This class provides beside the core graph features |
---|
934 | /// item addition interface for the graph structure. |
---|
935 | /// The difference between this class and the |
---|
936 | /// \c BaseExtendableGraphComponent is that it should |
---|
937 | /// notify the item alteration observers. |
---|
938 | class ExtendableGraphComponent : virtual public BaseGraphComponent { |
---|
939 | public: |
---|
940 | |
---|
941 | typedef ExtendableGraphComponent Graph; |
---|
942 | |
---|
943 | typedef BaseGraphComponent::Node Node; |
---|
944 | typedef BaseGraphComponent::Edge Edge; |
---|
945 | |
---|
946 | /// \brief Add a node to the graph. |
---|
947 | /// |
---|
948 | /// Add a node to the graph and notify the observers. |
---|
949 | Node addNode() { |
---|
950 | return INVALID; |
---|
951 | } |
---|
952 | |
---|
953 | /// \brief Add an edge to the graph. |
---|
954 | /// |
---|
955 | /// Add an edge to the graph and notify the observers. |
---|
956 | Edge addEdge(const Node&, const Node&) { |
---|
957 | return INVALID; |
---|
958 | } |
---|
959 | |
---|
960 | template <typename _Graph> |
---|
961 | struct Constraints { |
---|
962 | void constraints() { |
---|
963 | checkConcept<BaseGraphComponent, _Graph >(); |
---|
964 | typename _Graph::Node node_a, node_b; |
---|
965 | node_a = graph.addNode(); |
---|
966 | node_b = graph.addNode(); |
---|
967 | typename _Graph::Edge edge; |
---|
968 | edge = graph.addEdge(node_a, node_b); |
---|
969 | } |
---|
970 | _Graph& graph; |
---|
971 | }; |
---|
972 | }; |
---|
973 | |
---|
974 | /// \brief An empty erasable extended graph class. |
---|
975 | /// |
---|
976 | /// This class provides beside the core graph features |
---|
977 | /// item erase interface for the graph structure. |
---|
978 | /// The difference between this class and the |
---|
979 | /// \c BaseErasableGraphComponent is that it should |
---|
980 | /// notify the item alteration observers. |
---|
981 | class ErasableGraphComponent : virtual public BaseGraphComponent { |
---|
982 | public: |
---|
983 | |
---|
984 | typedef ErasableGraphComponent Graph; |
---|
985 | |
---|
986 | typedef BaseGraphComponent::Node Node; |
---|
987 | typedef BaseGraphComponent::Edge Edge; |
---|
988 | |
---|
989 | /// \brief Erase the Node and notify the node alteration observers. |
---|
990 | /// |
---|
991 | /// Erase the Node and notify the node alteration observers. |
---|
992 | void erase(const Node&) {} |
---|
993 | |
---|
994 | /// \brief Erase the Edge and notify the edge alteration observers. |
---|
995 | /// |
---|
996 | /// Erase the Edge and notify the edge alteration observers. |
---|
997 | void erase(const Edge&) {} |
---|
998 | |
---|
999 | template <typename _Graph> |
---|
1000 | struct Constraints { |
---|
1001 | void constraints() { |
---|
1002 | checkConcept<BaseGraphComponent, _Graph >(); |
---|
1003 | typename _Graph::Node node; |
---|
1004 | graph.erase(node); |
---|
1005 | typename _Graph::Edge edge; |
---|
1006 | graph.erase(edge); |
---|
1007 | } |
---|
1008 | |
---|
1009 | _Graph& graph; |
---|
1010 | }; |
---|
1011 | }; |
---|
1012 | |
---|
1013 | } |
---|
1014 | |
---|
1015 | } |
---|
1016 | |
---|
1017 | #endif |
---|