[906] | 1 | /* -*- C++ -*- |
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| 2 | * |
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[1956] | 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) 2003-2006 |
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| 6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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[1359] | 7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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[906] | 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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[1401] | 19 | #ifndef LEMON_GRAPH_ADAPTOR_H |
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| 20 | #define LEMON_GRAPH_ADAPTOR_H |
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[556] | 21 | |
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[2037] | 22 | ///\ingroup graph_adaptors |
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| 23 | ///\file |
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| 24 | ///\brief Several graph adaptors. |
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[556] | 25 | /// |
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[2037] | 26 | ///This file contains several useful graph adaptor functions. |
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[556] | 27 | /// |
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[2037] | 28 | ///\author Marton Makai and Balazs Dezso |
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[556] | 29 | |
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[1993] | 30 | #include <lemon/bits/invalid.h> |
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[921] | 31 | #include <lemon/maps.h> |
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[1979] | 32 | |
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[1999] | 33 | #include <lemon/bits/base_extender.h> |
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[1979] | 34 | #include <lemon/bits/graph_adaptor_extender.h> |
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[1791] | 35 | #include <lemon/bits/graph_extender.h> |
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[1979] | 36 | |
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[2034] | 37 | #include <lemon/tolerance.h> |
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| 38 | |
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[2079] | 39 | #include <algorithm> |
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[556] | 40 | |
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[921] | 41 | namespace lemon { |
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[556] | 42 | |
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[1951] | 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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[970] | 57 | template<typename _Graph> |
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[1401] | 58 | class GraphAdaptorBase { |
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[970] | 59 | public: |
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| 60 | typedef _Graph Graph; |
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[2031] | 61 | typedef GraphAdaptorBase Adaptor; |
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[970] | 62 | typedef Graph ParentGraph; |
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| 63 | |
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[556] | 64 | protected: |
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| 65 | Graph* graph; |
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[1401] | 66 | GraphAdaptorBase() : graph(0) { } |
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[556] | 67 | void setGraph(Graph& _graph) { graph=&_graph; } |
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| 68 | |
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| 69 | public: |
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[1401] | 70 | GraphAdaptorBase(Graph& _graph) : graph(&_graph) { } |
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[2034] | 71 | |
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[774] | 72 | typedef typename Graph::Node Node; |
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| 73 | typedef typename Graph::Edge Edge; |
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[556] | 74 | |
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[970] | 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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[556] | 79 | |
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[970] | 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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[986] | 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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[556] | 87 | |
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[1697] | 88 | typedef NodeNumTagIndicator<Graph> NodeNumTag; |
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[556] | 89 | int nodeNum() const { return graph->nodeNum(); } |
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[1697] | 90 | |
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| 91 | typedef EdgeNumTagIndicator<Graph> EdgeNumTag; |
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[556] | 92 | int edgeNum() const { return graph->edgeNum(); } |
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[1697] | 93 | |
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| 94 | typedef FindEdgeTagIndicator<Graph> FindEdgeTag; |
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| 95 | Edge findEdge(const Node& source, const Node& target, |
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| 96 | const Edge& prev = INVALID) { |
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| 97 | return graph->findEdge(source, target, prev); |
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| 98 | } |
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[556] | 99 | |
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[1697] | 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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[986] | 104 | Edge addEdge(const Node& source, const Node& target) const { |
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[1697] | 105 | return Edge(graph->addEdge(source, target)); |
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| 106 | } |
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[556] | 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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[739] | 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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[1991] | 115 | |
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[2031] | 116 | Node fromNodeId(int id) const { |
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| 117 | return graph->fromNodeId(id); |
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| 118 | } |
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| 119 | |
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| 120 | Edge fromEdgeId(int id) const { |
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| 121 | return graph->fromEdgeId(id); |
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| 122 | } |
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| 123 | |
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[1991] | 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& getNotifier(Node) const { |
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| 135 | return graph->getNotifier(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& getNotifier(Edge) const { |
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| 141 | return graph->getNotifier(Edge()); |
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| 142 | } |
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[650] | 143 | |
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[970] | 144 | template <typename _Value> |
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[2031] | 145 | class NodeMap : public Graph::template NodeMap<_Value> { |
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[970] | 146 | public: |
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[2031] | 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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[1991] | 154 | : Parent(*ga.graph, value) { } |
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[2031] | 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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[970] | 166 | }; |
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[556] | 167 | |
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[970] | 168 | template <typename _Value> |
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[2031] | 169 | class EdgeMap : public Graph::template EdgeMap<_Value> { |
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[970] | 170 | public: |
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[2031] | 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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[970] | 190 | }; |
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[877] | 191 | |
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[556] | 192 | }; |
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| 193 | |
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[2081] | 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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[970] | 200 | template <typename _Graph> |
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[1401] | 201 | class GraphAdaptor : |
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[1979] | 202 | public GraphAdaptorExtender<GraphAdaptorBase<_Graph> > { |
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[970] | 203 | public: |
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| 204 | typedef _Graph Graph; |
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[1979] | 205 | typedef GraphAdaptorExtender<GraphAdaptorBase<_Graph> > Parent; |
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[970] | 206 | protected: |
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[1401] | 207 | GraphAdaptor() : Parent() { } |
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[569] | 208 | |
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[970] | 209 | public: |
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[1755] | 210 | explicit GraphAdaptor(Graph& _graph) { setGraph(_graph); } |
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[970] | 211 | }; |
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[569] | 212 | |
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[1991] | 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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[997] | 224 | template <typename _Graph> |
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[1401] | 225 | class RevGraphAdaptorBase : public GraphAdaptorBase<_Graph> { |
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[997] | 226 | public: |
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| 227 | typedef _Graph Graph; |
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[1401] | 228 | typedef GraphAdaptorBase<_Graph> Parent; |
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[997] | 229 | protected: |
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[1401] | 230 | RevGraphAdaptorBase() : Parent() { } |
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[997] | 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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[1991] | 243 | |
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| 244 | typedef FindEdgeTagIndicator<Graph> FindEdgeTag; |
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| 245 | Edge findEdge(const Node& source, const Node& target, |
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| 246 | const Edge& prev = INVALID) { |
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| 247 | return Parent::findEdge(target, source, prev); |
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| 248 | } |
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| 249 | |
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[997] | 250 | }; |
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| 251 | |
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| 252 | |
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[2081] | 253 | ///\ingroup graph_adaptors |
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| 254 | /// |
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[1949] | 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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[1946] | 258 | ///\code |
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[923] | 259 | /// ListGraph g; |
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[1946] | 260 | ///\endcode |
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[1949] | 261 | /// then |
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[1946] | 262 | ///\code |
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[1991] | 263 | /// RevGraphAdaptor<ListGraph> ga(g); |
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[1946] | 264 | ///\endcode |
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[2079] | 265 | /// implements the graph obtained from \c g by |
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[1949] | 266 | /// reversing the orientation of its edges. |
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[2084] | 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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[997] | 301 | template<typename _Graph> |
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[1401] | 302 | class RevGraphAdaptor : |
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[1979] | 303 | public GraphAdaptorExtender<RevGraphAdaptorBase<_Graph> > { |
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[650] | 304 | public: |
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[997] | 305 | typedef _Graph Graph; |
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[1979] | 306 | typedef GraphAdaptorExtender< |
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[1401] | 307 | RevGraphAdaptorBase<_Graph> > Parent; |
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[556] | 308 | protected: |
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[1401] | 309 | RevGraphAdaptor() { } |
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[556] | 310 | public: |
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[1755] | 311 | explicit RevGraphAdaptor(_Graph& _graph) { setGraph(_graph); } |
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[997] | 312 | }; |
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[556] | 313 | |
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[1991] | 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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[1681] | 323 | template <typename _Graph, typename NodeFilterMap, |
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| 324 | typename EdgeFilterMap, bool checked = true> |
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[1401] | 325 | class SubGraphAdaptorBase : public GraphAdaptorBase<_Graph> { |
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[992] | 326 | public: |
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| 327 | typedef _Graph Graph; |
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[2031] | 328 | typedef SubGraphAdaptorBase Adaptor; |
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[1401] | 329 | typedef GraphAdaptorBase<_Graph> Parent; |
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[992] | 330 | protected: |
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| 331 | NodeFilterMap* node_filter_map; |
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| 332 | EdgeFilterMap* edge_filter_map; |
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[1401] | 333 | SubGraphAdaptorBase() : Parent(), |
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[992] | 334 | node_filter_map(0), edge_filter_map(0) { } |
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[775] | 335 | |
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[992] | 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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[1681] | 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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[1951] | 396 | ///\e |
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[1949] | 397 | |
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[1951] | 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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[1681] | 401 | void hide(const Node& n) const { node_filter_map->set(n, false); } |
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| 402 | |
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[1951] | 403 | ///\e |
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[1949] | 404 | |
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[1951] | 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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[1681] | 408 | void hide(const Edge& e) const { edge_filter_map->set(e, false); } |
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| 409 | |
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[1951] | 410 | ///\e |
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[1949] | 411 | |
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[1951] | 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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[1681] | 415 | void unHide(const Node& n) const { node_filter_map->set(n, true); } |
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| 416 | |
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[1951] | 417 | ///\e |
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[1949] | 418 | |
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[1951] | 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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[1681] | 422 | void unHide(const Edge& e) const { edge_filter_map->set(e, true); } |
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| 423 | |
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[1951] | 424 | /// Returns true if \c n is hidden. |
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[1949] | 425 | |
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[1951] | 426 | ///\e |
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| 427 | /// |
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[1681] | 428 | bool hidden(const Node& n) const { return !(*node_filter_map)[n]; } |
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| 429 | |
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[1951] | 430 | /// Returns true if \c n is hidden. |
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[1949] | 431 | |
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[1951] | 432 | ///\e |
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| 433 | /// |
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[1681] | 434 | bool hidden(const Edge& e) const { return !(*edge_filter_map)[e]; } |
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| 435 | |
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[1697] | 436 | typedef False NodeNumTag; |
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| 437 | typedef False EdgeNumTag; |
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[1991] | 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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[2031] | 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:: |
---|
| 460 | template NodeMap<_Value> > Parent; |
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| 461 | |
---|
| 462 | NodeMap(const Graph& graph) |
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| 463 | : Parent(graph) {} |
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| 464 | NodeMap(const Graph& graph, const _Value& value) |
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| 465 | : Parent(graph, value) {} |
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| 466 | |
---|
| 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 | |
---|
| 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 | } |
---|
| 476 | }; |
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| 477 | |
---|
| 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 | { |
---|
| 483 | public: |
---|
| 484 | typedef Adaptor Graph; |
---|
| 485 | typedef SubMapExtender<Adaptor, typename Parent:: |
---|
| 486 | template EdgeMap<_Value> > Parent; |
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| 487 | |
---|
| 488 | EdgeMap(const Graph& graph) |
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| 489 | : Parent(graph) {} |
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| 490 | EdgeMap(const Graph& graph, const _Value& value) |
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| 491 | : Parent(graph, value) {} |
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| 492 | |
---|
| 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 | |
---|
| 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; |
---|
| 501 | } |
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| 502 | }; |
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| 503 | |
---|
[1681] | 504 | }; |
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| 505 | |
---|
| 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: |
---|
| 510 | typedef _Graph Graph; |
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[2031] | 511 | typedef SubGraphAdaptorBase Adaptor; |
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[1681] | 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) { } |
---|
| 518 | |
---|
| 519 | void setNodeFilterMap(NodeFilterMap& _node_filter_map) { |
---|
| 520 | node_filter_map=&_node_filter_map; |
---|
| 521 | } |
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| 522 | void setEdgeFilterMap(EdgeFilterMap& _edge_filter_map) { |
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| 523 | edge_filter_map=&_edge_filter_map; |
---|
| 524 | } |
---|
| 525 | |
---|
| 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 | |
---|
[992] | 536 | void first(Edge& i) const { |
---|
| 537 | Parent::first(i); |
---|
| 538 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::next(i); |
---|
| 539 | } |
---|
[1681] | 540 | |
---|
[992] | 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 | } |
---|
[1681] | 545 | |
---|
[992] | 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 | } |
---|
[1681] | 563 | |
---|
[992] | 564 | void nextOut(Edge& i) const { |
---|
| 565 | Parent::nextOut(i); |
---|
| 566 | while (i!=INVALID && !(*edge_filter_map)[i]) Parent::nextOut(i); |
---|
| 567 | } |
---|
| 568 | |
---|
[1951] | 569 | ///\e |
---|
[1949] | 570 | |
---|
[1951] | 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. |
---|
[992] | 574 | void hide(const Node& n) const { node_filter_map->set(n, false); } |
---|
| 575 | |
---|
[1951] | 576 | ///\e |
---|
[1949] | 577 | |
---|
[1951] | 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. |
---|
[992] | 581 | void hide(const Edge& e) const { edge_filter_map->set(e, false); } |
---|
| 582 | |
---|
[1951] | 583 | ///\e |
---|
[1949] | 584 | |
---|
[1951] | 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 |
---|
[992] | 588 | void unHide(const Node& n) const { node_filter_map->set(n, true); } |
---|
| 589 | |
---|
[1951] | 590 | ///\e |
---|
[1949] | 591 | |
---|
[1951] | 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 |
---|
[992] | 595 | void unHide(const Edge& e) const { edge_filter_map->set(e, true); } |
---|
| 596 | |
---|
[1951] | 597 | /// Returns true if \c n is hidden. |
---|
[1949] | 598 | |
---|
[1951] | 599 | ///\e |
---|
| 600 | /// |
---|
[992] | 601 | bool hidden(const Node& n) const { return !(*node_filter_map)[n]; } |
---|
| 602 | |
---|
[1951] | 603 | /// Returns true if \c n is hidden. |
---|
[1949] | 604 | |
---|
[1951] | 605 | ///\e |
---|
| 606 | /// |
---|
[992] | 607 | bool hidden(const Edge& e) const { return !(*edge_filter_map)[e]; } |
---|
| 608 | |
---|
[1697] | 609 | typedef False NodeNumTag; |
---|
| 610 | typedef False EdgeNumTag; |
---|
[1991] | 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 | } |
---|
[2031] | 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& graph) |
---|
| 636 | : Parent(graph) {} |
---|
| 637 | NodeMap(const Graph& graph, const _Value& value) |
---|
| 638 | : Parent(graph, value) {} |
---|
| 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& graph) |
---|
| 662 | : Parent(graph) {} |
---|
| 663 | EdgeMap(const Graph& graph, const _Value& value) |
---|
| 664 | : Parent(graph, value) {} |
---|
| 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 | |
---|
[992] | 677 | }; |
---|
[775] | 678 | |
---|
[2081] | 679 | /// \ingroup graph_adaptors |
---|
| 680 | /// |
---|
[1951] | 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. |
---|
[1952] | 686 | /// Let \f$ G=(V, A) \f$ be a directed graph |
---|
[1951] | 687 | /// and suppose that the graph instance \c g of type ListGraph |
---|
[1952] | 688 | /// implements \f$ G \f$. |
---|
| 689 | /// Let moreover \f$ b_V \f$ and \f$ b_A \f$ be bool-valued functions resp. |
---|
[1951] | 690 | /// on the node-set and edge-set. |
---|
| 691 | /// SubGraphAdaptor<...>::NodeIt iterates |
---|
[1952] | 692 | /// on the node-set \f$ \{v\in V : b_V(v)=true\} \f$ and |
---|
[1951] | 693 | /// SubGraphAdaptor<...>::EdgeIt iterates |
---|
[1952] | 694 | /// on the edge-set \f$ \{e\in A : b_A(e)=true\} \f$. Similarly, |
---|
[1951] | 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. |
---|
[1957] | 705 | ///\code |
---|
[1951] | 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); |
---|
[1991] | 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; |
---|
[1951] | 721 | /// std::cout << ":-)" << std::endl; |
---|
[1991] | 722 | /// for (SubGA::EdgeIt e(ga); e!=INVALID; ++e) std::cout << g.id(e) << std::endl; |
---|
[1957] | 723 | ///\endcode |
---|
[1951] | 724 | /// The output of the above code is the following. |
---|
[1957] | 725 | ///\code |
---|
[1951] | 726 | /// 1 |
---|
| 727 | /// :-) |
---|
| 728 | /// 1 |
---|
[1957] | 729 | ///\endcode |
---|
[1991] | 730 | /// Note that \c n is of type \c SubGA::NodeIt, but it can be converted to |
---|
[1951] | 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 |
---|
[1242] | 737 | |
---|
[992] | 738 | template<typename _Graph, typename NodeFilterMap, |
---|
[1681] | 739 | typename EdgeFilterMap, bool checked = true> |
---|
[1401] | 740 | class SubGraphAdaptor : |
---|
[1979] | 741 | public GraphAdaptorExtender< |
---|
[1681] | 742 | SubGraphAdaptorBase<_Graph, NodeFilterMap, EdgeFilterMap, checked> > { |
---|
[650] | 743 | public: |
---|
[992] | 744 | typedef _Graph Graph; |
---|
[2031] | 745 | typedef GraphAdaptorExtender< SubGraphAdaptorBase<_Graph, NodeFilterMap, |
---|
| 746 | EdgeFilterMap, checked> > |
---|
| 747 | Parent; |
---|
| 748 | |
---|
[556] | 749 | protected: |
---|
[1401] | 750 | SubGraphAdaptor() { } |
---|
[992] | 751 | public: |
---|
[2031] | 752 | |
---|
[1401] | 753 | SubGraphAdaptor(_Graph& _graph, NodeFilterMap& _node_filter_map, |
---|
[992] | 754 | EdgeFilterMap& _edge_filter_map) { |
---|
| 755 | setGraph(_graph); |
---|
| 756 | setNodeFilterMap(_node_filter_map); |
---|
| 757 | setEdgeFilterMap(_edge_filter_map); |
---|
| 758 | } |
---|
[2031] | 759 | |
---|
[992] | 760 | }; |
---|
[556] | 761 | |
---|
[1991] | 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 | |
---|
[556] | 797 | |
---|
[569] | 798 | |
---|
[2081] | 799 | ///\ingroup graph_adaptors |
---|
| 800 | /// |
---|
[1951] | 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 only |
---|
| 808 | ///filter only isolated nodes. |
---|
| 809 | ///\author Marton Makai |
---|
[1681] | 810 | template<typename Graph, typename NodeFilterMap, bool checked = true> |
---|
[1401] | 811 | class NodeSubGraphAdaptor : |
---|
| 812 | public SubGraphAdaptor<Graph, NodeFilterMap, |
---|
[1681] | 813 | ConstMap<typename Graph::Edge,bool>, checked> { |
---|
[933] | 814 | public: |
---|
[2031] | 815 | |
---|
[1401] | 816 | typedef SubGraphAdaptor<Graph, NodeFilterMap, |
---|
[2031] | 817 | ConstMap<typename Graph::Edge,bool>, checked > |
---|
| 818 | Parent; |
---|
| 819 | |
---|
[933] | 820 | protected: |
---|
| 821 | ConstMap<typename Graph::Edge, bool> const_true_map; |
---|
[1991] | 822 | |
---|
| 823 | NodeSubGraphAdaptor() : const_true_map(true) { |
---|
| 824 | Parent::setEdgeFilterMap(const_true_map); |
---|
| 825 | } |
---|
| 826 | |
---|
[933] | 827 | public: |
---|
[2031] | 828 | |
---|
[1401] | 829 | NodeSubGraphAdaptor(Graph& _graph, NodeFilterMap& _node_filter_map) : |
---|
[933] | 830 | Parent(), const_true_map(true) { |
---|
| 831 | Parent::setGraph(_graph); |
---|
| 832 | Parent::setNodeFilterMap(_node_filter_map); |
---|
| 833 | Parent::setEdgeFilterMap(const_true_map); |
---|
| 834 | } |
---|
[2031] | 835 | |
---|
[933] | 836 | }; |
---|
| 837 | |
---|
| 838 | |
---|
[1991] | 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 | |
---|
[2081] | 854 | ///\ingroup graph_adaptors |
---|
| 855 | /// |
---|
[1951] | 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 | /// |
---|
[1991] | 940 | ///typedef EdgeSubGraphAdaptor<Graph, TightEdgeFilter> SubGA; |
---|
| 941 | ///SubGA ga(g, tight_edge_filter); |
---|
[1951] | 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 | /// |
---|
[1991] | 949 | ///Preflow<SubGA, int, ConstMap<Edge, int>, Graph::EdgeMap<int> > |
---|
| 950 | /// preflow(ga, s, t, const_1_map, flow); |
---|
[1951] | 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 (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 |
---|
[932] | 989 | template<typename Graph, typename EdgeFilterMap> |
---|
[1401] | 990 | class EdgeSubGraphAdaptor : |
---|
| 991 | public SubGraphAdaptor<Graph, ConstMap<typename Graph::Node,bool>, |
---|
[1681] | 992 | EdgeFilterMap, false> { |
---|
[932] | 993 | public: |
---|
[1401] | 994 | typedef SubGraphAdaptor<Graph, ConstMap<typename Graph::Node,bool>, |
---|
[1685] | 995 | EdgeFilterMap, false> Parent; |
---|
[932] | 996 | protected: |
---|
| 997 | ConstMap<typename Graph::Node, bool> const_true_map; |
---|
[1991] | 998 | |
---|
| 999 | EdgeSubGraphAdaptor() : const_true_map(true) { |
---|
| 1000 | Parent::setNodeFilterMap(const_true_map); |
---|
| 1001 | } |
---|
| 1002 | |
---|
[932] | 1003 | public: |
---|
[2031] | 1004 | |
---|
[1401] | 1005 | EdgeSubGraphAdaptor(Graph& _graph, EdgeFilterMap& _edge_filter_map) : |
---|
[932] | 1006 | Parent(), const_true_map(true) { |
---|
| 1007 | Parent::setGraph(_graph); |
---|
| 1008 | Parent::setNodeFilterMap(const_true_map); |
---|
| 1009 | Parent::setEdgeFilterMap(_edge_filter_map); |
---|
| 1010 | } |
---|
[2031] | 1011 | |
---|
[932] | 1012 | }; |
---|
| 1013 | |
---|
[1991] | 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 | |
---|
[2079] | 1029 | template <typename _Graph> |
---|
[1980] | 1030 | class UndirGraphAdaptorBase : |
---|
[2079] | 1031 | public UndirGraphExtender<GraphAdaptorBase<_Graph> > { |
---|
[1383] | 1032 | public: |
---|
| 1033 | typedef _Graph Graph; |
---|
[2031] | 1034 | typedef UndirGraphAdaptorBase Adaptor; |
---|
[2079] | 1035 | typedef UndirGraphExtender<GraphAdaptorBase<_Graph> > Parent; |
---|
[1991] | 1036 | |
---|
[1383] | 1037 | protected: |
---|
[1991] | 1038 | |
---|
| 1039 | UndirGraphAdaptorBase() : Parent() {} |
---|
| 1040 | |
---|
[1383] | 1041 | public: |
---|
[1991] | 1042 | |
---|
[1909] | 1043 | typedef typename Parent::UEdge UEdge; |
---|
[1383] | 1044 | typedef typename Parent::Edge Edge; |
---|
[1991] | 1045 | |
---|
[2031] | 1046 | private: |
---|
[1383] | 1047 | |
---|
[1991] | 1048 | template <typename _Value> |
---|
[2031] | 1049 | class EdgeMapBase { |
---|
[1991] | 1050 | private: |
---|
| 1051 | |
---|
| 1052 | typedef typename _Graph::template EdgeMap<_Value> MapImpl; |
---|
| 1053 | |
---|
[1383] | 1054 | public: |
---|
[1991] | 1055 | |
---|
| 1056 | typedef typename MapTraits<MapImpl>::ReferenceMapTag ReferenceMapTag; |
---|
| 1057 | |
---|
| 1058 | typedef _Value Value; |
---|
[1383] | 1059 | typedef Edge Key; |
---|
| 1060 | |
---|
[2031] | 1061 | EdgeMapBase(const Adaptor& adaptor) : |
---|
| 1062 | forward_map(*adaptor.graph), backward_map(*adaptor.graph) {} |
---|
[569] | 1063 | |
---|
[2031] | 1064 | EdgeMapBase(const Adaptor& adaptor, const Value& v) |
---|
| 1065 | : forward_map(*adaptor.graph, v), backward_map(*adaptor.graph, v) {} |
---|
[1383] | 1066 | |
---|
[1991] | 1067 | void set(const Edge& e, const Value& a) { |
---|
| 1068 | if (Parent::direction(e)) { |
---|
[1383] | 1069 | forward_map.set(e, a); |
---|
[1991] | 1070 | } else { |
---|
| 1071 | backward_map.set(e, a); |
---|
| 1072 | } |
---|
[1383] | 1073 | } |
---|
[556] | 1074 | |
---|
[1991] | 1075 | typename MapTraits<MapImpl>::ConstReturnValue operator[](Edge e) const { |
---|
| 1076 | if (Parent::direction(e)) { |
---|
[1383] | 1077 | return forward_map[e]; |
---|
[1991] | 1078 | } else { |
---|
[1383] | 1079 | return backward_map[e]; |
---|
[1991] | 1080 | } |
---|
[556] | 1081 | } |
---|
[1991] | 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 | |
---|
[556] | 1095 | }; |
---|
[2031] | 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& graph) |
---|
| 1108 | : Parent(graph) {} |
---|
| 1109 | EdgeMap(const Graph& graph, const _Value& value) |
---|
| 1110 | : Parent(graph, value) {} |
---|
| 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 | }; |
---|
[1383] | 1122 | |
---|
[1991] | 1123 | template <typename _Value> |
---|
[2031] | 1124 | class UEdgeMap : public Graph::template EdgeMap<_Value> { |
---|
[1383] | 1125 | public: |
---|
[2031] | 1126 | |
---|
| 1127 | typedef typename Graph::template EdgeMap<_Value> Parent; |
---|
| 1128 | |
---|
| 1129 | explicit UEdgeMap(const Adaptor& ga) |
---|
| 1130 | : Parent(*ga.graph) {} |
---|
[1991] | 1131 | |
---|
[2031] | 1132 | UEdgeMap(const Adaptor& ga, const _Value& value) |
---|
| 1133 | : Parent(*ga.graph, value) {} |
---|
[1991] | 1134 | |
---|
[2031] | 1135 | UEdgeMap& operator=(const UEdgeMap& cmap) { |
---|
| 1136 | return operator=<UEdgeMap>(cmap); |
---|
| 1137 | } |
---|
[1991] | 1138 | |
---|
[2031] | 1139 | template <typename CMap> |
---|
| 1140 | UEdgeMap& operator=(const CMap& cmap) { |
---|
| 1141 | Parent::operator=(cmap); |
---|
| 1142 | return *this; |
---|
| 1143 | } |
---|
| 1144 | |
---|
[1991] | 1145 | }; |
---|
| 1146 | |
---|
| 1147 | }; |
---|
[556] | 1148 | |
---|
[2079] | 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 | |
---|
[1991] | 1159 | public: |
---|
| 1160 | |
---|
[2079] | 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; |
---|
[1991] | 1174 | typedef _Graph Graph; |
---|
[2079] | 1175 | typedef typename _Graph::Edge GraphEdge; |
---|
| 1176 | |
---|
[1991] | 1177 | protected: |
---|
| 1178 | |
---|
[2079] | 1179 | AlterableUndirGraphAdaptor() |
---|
| 1180 | : Parent(), edge_notifier(*this), edge_notifier_proxy(*this) {} |
---|
[1991] | 1181 | |
---|
| 1182 | void setGraph(_Graph& graph) { |
---|
| 1183 | Parent::setGraph(graph); |
---|
[2079] | 1184 | edge_notifier_proxy.setNotifier(graph.getNotifier(GraphEdge())); |
---|
[1991] | 1185 | } |
---|
| 1186 | |
---|
| 1187 | public: |
---|
| 1188 | |
---|
[2079] | 1189 | ~AlterableUndirGraphAdaptor() { |
---|
[1999] | 1190 | edge_notifier.clear(); |
---|
| 1191 | } |
---|
| 1192 | |
---|
[1991] | 1193 | typedef typename Parent::UEdge UEdge; |
---|
| 1194 | typedef typename Parent::Edge Edge; |
---|
| 1195 | |
---|
| 1196 | typedef typename Parent::EdgeNotifier UEdgeNotifier; |
---|
| 1197 | |
---|
| 1198 | using Parent::getNotifier; |
---|
| 1199 | |
---|
[2079] | 1200 | typedef AlterationNotifier<AlterableUndirGraphAdaptor, |
---|
| 1201 | Edge> EdgeNotifier; |
---|
[1991] | 1202 | EdgeNotifier& getNotifier(Edge) const { return edge_notifier; } |
---|
| 1203 | |
---|
| 1204 | protected: |
---|
| 1205 | |
---|
[2079] | 1206 | class NotifierProxy : public Graph::EdgeNotifier::ObserverBase { |
---|
[1991] | 1207 | public: |
---|
| 1208 | |
---|
[2079] | 1209 | typedef typename Graph::EdgeNotifier::ObserverBase Parent; |
---|
| 1210 | typedef AlterableUndirGraphAdaptor AdaptorBase; |
---|
[1383] | 1211 | |
---|
[2079] | 1212 | NotifierProxy(const AdaptorBase& _adaptor) |
---|
| 1213 | : Parent(), adaptor(&_adaptor) { |
---|
[1383] | 1214 | } |
---|
[556] | 1215 | |
---|
[1991] | 1216 | virtual ~NotifierProxy() { |
---|
| 1217 | if (Parent::attached()) { |
---|
| 1218 | Parent::detach(); |
---|
| 1219 | } |
---|
[1383] | 1220 | } |
---|
[1991] | 1221 | |
---|
[2079] | 1222 | void setNotifier(typename Graph::EdgeNotifier& notifier) { |
---|
| 1223 | Parent::attach(notifier); |
---|
[1991] | 1224 | } |
---|
| 1225 | |
---|
| 1226 | |
---|
| 1227 | protected: |
---|
| 1228 | |
---|
[2079] | 1229 | virtual void add(const GraphEdge& ge) { |
---|
[1991] | 1230 | std::vector<Edge> edges; |
---|
[2079] | 1231 | edges.push_back(AdaptorBase::Parent::direct(ge, true)); |
---|
| 1232 | edges.push_back(AdaptorBase::Parent::direct(ge, false)); |
---|
| 1233 | adaptor->getNotifier(Edge()).add(edges); |
---|
[1991] | 1234 | } |
---|
[2079] | 1235 | virtual void add(const std::vector<GraphEdge>& ge) { |
---|
[1991] | 1236 | std::vector<Edge> edges; |
---|
[2079] | 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)); |
---|
[1991] | 1240 | } |
---|
[2079] | 1241 | adaptor->getNotifier(Edge()).add(edges); |
---|
[1991] | 1242 | } |
---|
[2079] | 1243 | virtual void erase(const GraphEdge& ge) { |
---|
[1991] | 1244 | std::vector<Edge> edges; |
---|
[2079] | 1245 | edges.push_back(AdaptorBase::Parent::direct(ge, true)); |
---|
| 1246 | edges.push_back(AdaptorBase::Parent::direct(ge, false)); |
---|
| 1247 | adaptor->getNotifier(Edge()).erase(edges); |
---|
[1991] | 1248 | } |
---|
[2079] | 1249 | virtual void erase(const std::vector<GraphEdge>& ge) { |
---|
[1991] | 1250 | std::vector<Edge> edges; |
---|
[2079] | 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)); |
---|
[1991] | 1254 | } |
---|
[2079] | 1255 | adaptor->getNotifier(Edge()).erase(edges); |
---|
[1991] | 1256 | } |
---|
| 1257 | virtual void build() { |
---|
[2079] | 1258 | adaptor->getNotifier(Edge()).build(); |
---|
[1991] | 1259 | } |
---|
| 1260 | virtual void clear() { |
---|
[2079] | 1261 | adaptor->getNotifier(Edge()).clear(); |
---|
[1991] | 1262 | } |
---|
| 1263 | |
---|
[2079] | 1264 | const AdaptorBase* adaptor; |
---|
[1991] | 1265 | }; |
---|
| 1266 | |
---|
| 1267 | |
---|
| 1268 | mutable EdgeNotifier edge_notifier; |
---|
| 1269 | NotifierProxy edge_notifier_proxy; |
---|
| 1270 | |
---|
[1383] | 1271 | }; |
---|
| 1272 | |
---|
[2079] | 1273 | |
---|
[2081] | 1274 | ///\ingroup graph_adaptors |
---|
| 1275 | /// |
---|
[2079] | 1276 | /// \brief An undirected graph is made from a directed graph by an adaptor |
---|
[1951] | 1277 | /// |
---|
| 1278 | /// Undocumented, untested!!! |
---|
| 1279 | /// If somebody knows nice demo application, let's polulate it. |
---|
| 1280 | /// |
---|
| 1281 | /// \author Marton Makai |
---|
[1383] | 1282 | template<typename _Graph> |
---|
[2079] | 1283 | class UndirGraphAdaptor : public AlterableUndirGraphAdaptor<_Graph> { |
---|
[1383] | 1284 | public: |
---|
| 1285 | typedef _Graph Graph; |
---|
[2079] | 1286 | typedef AlterableUndirGraphAdaptor<_Graph> Parent; |
---|
[1383] | 1287 | protected: |
---|
[1980] | 1288 | UndirGraphAdaptor() { } |
---|
[1383] | 1289 | public: |
---|
[1980] | 1290 | UndirGraphAdaptor(_Graph& _graph) { |
---|
[1383] | 1291 | setGraph(_graph); |
---|
[556] | 1292 | } |
---|
| 1293 | |
---|
[1991] | 1294 | template <typename _ForwardMap, typename _BackwardMap> |
---|
| 1295 | class CombinedEdgeMap { |
---|
| 1296 | public: |
---|
| 1297 | |
---|
| 1298 | typedef _ForwardMap ForwardMap; |
---|
| 1299 | typedef _BackwardMap BackwardMap; |
---|
[992] | 1300 | |
---|
[1991] | 1301 | typedef typename MapTraits<ForwardMap>::ReferenceMapTag ReferenceMapTag; |
---|
[992] | 1302 | |
---|
[1991] | 1303 | typedef typename ForwardMap::Value Value; |
---|
| 1304 | typedef typename Parent::Edge Key; |
---|
| 1305 | |
---|
| 1306 | CombinedEdgeMap() : forward_map(0), backward_map(0) {} |
---|
[992] | 1307 | |
---|
[1991] | 1308 | CombinedEdgeMap(ForwardMap& _forward_map, BackwardMap& _backward_map) |
---|
| 1309 | : forward_map(&_forward_map), backward_map(&_backward_map) {} |
---|
[992] | 1310 | |
---|
[1991] | 1311 | void set(const Key& e, const Value& a) { |
---|
| 1312 | if (Parent::direction(e)) { |
---|
| 1313 | forward_map->set(e, a); |
---|
| 1314 | } else { |
---|
| 1315 | backward_map->set(e, a); |
---|
| 1316 | } |
---|
[992] | 1317 | } |
---|
| 1318 | |
---|
[1991] | 1319 | typename MapTraits<ForwardMap>::ConstReturnValue |
---|
| 1320 | operator[](const Key& e) const { |
---|
| 1321 | if (Parent::direction(e)) { |
---|
| 1322 | return (*forward_map)[e]; |
---|
| 1323 | } else { |
---|
| 1324 | return (*backward_map)[e]; |
---|
| 1325 | } |
---|
[992] | 1326 | } |
---|
| 1327 | |
---|
[1991] | 1328 | typename MapTraits<ForwardMap>::ReturnValue |
---|
| 1329 | operator[](const Key& e) { |
---|
| 1330 | if (Parent::direction(e)) { |
---|
| 1331 | return (*forward_map)[e]; |
---|
| 1332 | } else { |
---|
| 1333 | return (*backward_map)[e]; |
---|
| 1334 | } |
---|
[992] | 1335 | } |
---|
[1991] | 1336 | |
---|
| 1337 | void setForwardMap(ForwardMap& _forward_map) { |
---|
| 1338 | forward_map = &_forward_map; |
---|
| 1339 | } |
---|
| 1340 | |
---|
| 1341 | void setBackwardMap(BackwardMap& _backward_map) { |
---|
| 1342 | backward_map = &_backward_map; |
---|
| 1343 | } |
---|
| 1344 | |
---|
| 1345 | protected: |
---|
| 1346 | |
---|
| 1347 | ForwardMap* forward_map; |
---|
| 1348 | BackwardMap* backward_map; |
---|
| 1349 | |
---|
[992] | 1350 | }; |
---|
| 1351 | |
---|
| 1352 | }; |
---|
[569] | 1353 | |
---|
[1991] | 1354 | /// \brief Just gives back an undir graph adaptor |
---|
[1951] | 1355 | /// |
---|
[1991] | 1356 | /// Just gives back an undir graph adaptor |
---|
[650] | 1357 | template<typename Graph> |
---|
[1991] | 1358 | UndirGraphAdaptor<const Graph> |
---|
| 1359 | undirGraphAdaptor(const Graph& graph) { |
---|
| 1360 | return UndirGraphAdaptor<const Graph>(graph); |
---|
| 1361 | } |
---|
[650] | 1362 | |
---|
[2034] | 1363 | template<typename Graph, typename Number, |
---|
| 1364 | typename CapacityMap, typename FlowMap, |
---|
| 1365 | typename Tolerance = Tolerance<Number> > |
---|
[658] | 1366 | class ResForwardFilter { |
---|
[650] | 1367 | const CapacityMap* capacity; |
---|
| 1368 | const FlowMap* flow; |
---|
[2034] | 1369 | Tolerance tolerance; |
---|
[650] | 1370 | public: |
---|
[1991] | 1371 | typedef typename Graph::Edge Key; |
---|
| 1372 | typedef bool Value; |
---|
| 1373 | |
---|
[2034] | 1374 | ResForwardFilter(const CapacityMap& _capacity, const FlowMap& _flow, |
---|
| 1375 | const Tolerance& _tolerance = Tolerance()) |
---|
| 1376 | : capacity(&_capacity), flow(&_flow), tolerance(_tolerance) { } |
---|
| 1377 | |
---|
| 1378 | ResForwardFilter(const Tolerance& _tolerance) |
---|
| 1379 | : capacity(0), flow(0), tolerance(_tolerance) { } |
---|
| 1380 | |
---|
[1991] | 1381 | void setCapacity(const CapacityMap& _capacity) { capacity = &_capacity; } |
---|
| 1382 | void setFlow(const FlowMap& _flow) { flow = &_flow; } |
---|
[2034] | 1383 | |
---|
[650] | 1384 | bool operator[](const typename Graph::Edge& e) const { |
---|
[2034] | 1385 | return tolerance.less((*flow)[e], (*capacity)[e]); |
---|
[650] | 1386 | } |
---|
| 1387 | }; |
---|
| 1388 | |
---|
| 1389 | template<typename Graph, typename Number, |
---|
[2034] | 1390 | typename CapacityMap, typename FlowMap, |
---|
| 1391 | typename Tolerance = Tolerance<Number> > |
---|
[658] | 1392 | class ResBackwardFilter { |
---|
[650] | 1393 | const CapacityMap* capacity; |
---|
| 1394 | const FlowMap* flow; |
---|
[2034] | 1395 | Tolerance tolerance; |
---|
[650] | 1396 | public: |
---|
[1991] | 1397 | typedef typename Graph::Edge Key; |
---|
| 1398 | typedef bool Value; |
---|
| 1399 | |
---|
[2034] | 1400 | ResBackwardFilter(const CapacityMap& _capacity, const FlowMap& _flow, |
---|
| 1401 | const Tolerance& _tolerance = Tolerance()) |
---|
| 1402 | : capacity(&_capacity), flow(&_flow), tolerance(_tolerance) { } |
---|
| 1403 | ResBackwardFilter(const Tolerance& _tolerance = Tolerance()) |
---|
| 1404 | : capacity(0), flow(0), tolerance(_tolerance) { } |
---|
[1991] | 1405 | void setCapacity(const CapacityMap& _capacity) { capacity = &_capacity; } |
---|
| 1406 | void setFlow(const FlowMap& _flow) { flow = &_flow; } |
---|
[650] | 1407 | bool operator[](const typename Graph::Edge& e) const { |
---|
[2034] | 1408 | return tolerance.less(0, Number((*flow)[e])); |
---|
[650] | 1409 | } |
---|
| 1410 | }; |
---|
| 1411 | |
---|
[653] | 1412 | |
---|
[2081] | 1413 | ///\ingroup graph_adaptors |
---|
| 1414 | /// |
---|
[1951] | 1415 | ///\brief An adaptor for composing the residual |
---|
| 1416 | ///graph for directed flow and circulation problems. |
---|
[2037] | 1417 | /// |
---|
[2042] | 1418 | ///An adaptor for composing the residual graph for directed flow and |
---|
| 1419 | ///circulation problems. Let \f$ G=(V, A) \f$ be a directed graph |
---|
| 1420 | ///and let \f$ F \f$ be a number type. Let moreover \f$ f,c:A\to F \f$, |
---|
| 1421 | ///be functions on the edge-set. |
---|
| 1422 | /// |
---|
| 1423 | ///In the appications of ResGraphAdaptor, \f$ f \f$ usually stands |
---|
| 1424 | ///for a flow and \f$ c \f$ for a capacity function. Suppose that a |
---|
| 1425 | ///graph instange \c g of type \c ListGraph implements \f$ G \f$. |
---|
| 1426 | /// |
---|
| 1427 | ///\code |
---|
| 1428 | /// ListGraph g; |
---|
| 1429 | ///\endcode |
---|
| 1430 | /// |
---|
| 1431 | ///Then RevGraphAdaptor implements the graph structure with node-set |
---|
| 1432 | /// \f$ V \f$ and edge-set \f$ A_{forward}\cup A_{backward} \f$, |
---|
| 1433 | ///where \f$ A_{forward}=\{uv : uv\in A, f(uv)<c(uv)\} \f$ and |
---|
| 1434 | /// \f$ A_{backward}=\{vu : uv\in A, f(uv)>0\} \f$, i.e. the so called |
---|
| 1435 | ///residual graph. When we take the union |
---|
| 1436 | /// \f$ A_{forward}\cup A_{backward} \f$, multilicities are counted, i.e. |
---|
| 1437 | ///if an edge is in both \f$ A_{forward} \f$ and \f$ A_{backward} \f$, |
---|
| 1438 | ///then in the adaptor it appears twice. The following code shows how |
---|
| 1439 | ///such an instance can be constructed. |
---|
| 1440 | /// |
---|
| 1441 | ///\code |
---|
| 1442 | /// typedef ListGraph Graph; |
---|
| 1443 | /// Graph::EdgeMap<int> f(g); |
---|
| 1444 | /// Graph::EdgeMap<int> c(g); |
---|
| 1445 | /// ResGraphAdaptor<Graph, int, Graph::EdgeMap<int>, Graph::EdgeMap<int> > ga(g); |
---|
| 1446 | ///\endcode |
---|
| 1447 | ///\author Marton Makai |
---|
| 1448 | /// |
---|
[650] | 1449 | template<typename Graph, typename Number, |
---|
[2034] | 1450 | typename CapacityMap, typename FlowMap, |
---|
| 1451 | typename Tolerance = Tolerance<Number> > |
---|
[1401] | 1452 | class ResGraphAdaptor : |
---|
[1991] | 1453 | public EdgeSubGraphAdaptor< |
---|
[2034] | 1454 | UndirGraphAdaptor<const Graph>, |
---|
| 1455 | typename UndirGraphAdaptor<const Graph>::template CombinedEdgeMap< |
---|
| 1456 | ResForwardFilter<const Graph, Number, CapacityMap, FlowMap>, |
---|
| 1457 | ResBackwardFilter<const Graph, Number, CapacityMap, FlowMap> > > { |
---|
[650] | 1458 | public: |
---|
[1991] | 1459 | |
---|
[2034] | 1460 | typedef UndirGraphAdaptor<const Graph> UGraph; |
---|
[1991] | 1461 | |
---|
[2034] | 1462 | typedef ResForwardFilter<const Graph, Number, CapacityMap, FlowMap> |
---|
[1991] | 1463 | ForwardFilter; |
---|
| 1464 | |
---|
[2034] | 1465 | typedef ResBackwardFilter<const Graph, Number, CapacityMap, FlowMap> |
---|
[1991] | 1466 | BackwardFilter; |
---|
| 1467 | |
---|
| 1468 | typedef typename UGraph:: |
---|
| 1469 | template CombinedEdgeMap<ForwardFilter, BackwardFilter> |
---|
| 1470 | EdgeFilter; |
---|
| 1471 | |
---|
| 1472 | typedef EdgeSubGraphAdaptor<UGraph, EdgeFilter> Parent; |
---|
| 1473 | |
---|
[650] | 1474 | protected: |
---|
[1991] | 1475 | |
---|
[650] | 1476 | const CapacityMap* capacity; |
---|
| 1477 | FlowMap* flow; |
---|
[1991] | 1478 | |
---|
| 1479 | UGraph ugraph; |
---|
| 1480 | ForwardFilter forward_filter; |
---|
| 1481 | BackwardFilter backward_filter; |
---|
| 1482 | EdgeFilter edge_filter; |
---|
| 1483 | |
---|
[658] | 1484 | void setCapacityMap(const CapacityMap& _capacity) { |
---|
| 1485 | capacity=&_capacity; |
---|
| 1486 | forward_filter.setCapacity(_capacity); |
---|
| 1487 | backward_filter.setCapacity(_capacity); |
---|
| 1488 | } |
---|
[1991] | 1489 | |
---|
[658] | 1490 | void setFlowMap(FlowMap& _flow) { |
---|
| 1491 | flow=&_flow; |
---|
| 1492 | forward_filter.setFlow(_flow); |
---|
| 1493 | backward_filter.setFlow(_flow); |
---|
| 1494 | } |
---|
[1991] | 1495 | |
---|
[650] | 1496 | public: |
---|
[1991] | 1497 | |
---|
[2034] | 1498 | /// \brief Constructor of the residual graph. |
---|
| 1499 | /// |
---|
| 1500 | /// Constructor of the residual graph. The parameters are the graph type, |
---|
| 1501 | /// the flow map, the capacity map and a tolerance object. |
---|
| 1502 | ResGraphAdaptor(const Graph& _graph, const CapacityMap& _capacity, |
---|
| 1503 | FlowMap& _flow, const Tolerance& _tolerance = Tolerance()) |
---|
| 1504 | : Parent(), capacity(&_capacity), flow(&_flow), ugraph(_graph), |
---|
| 1505 | forward_filter(_capacity, _flow, _tolerance), |
---|
| 1506 | backward_filter(_capacity, _flow, _tolerance), |
---|
| 1507 | edge_filter(forward_filter, backward_filter) |
---|
| 1508 | { |
---|
[1991] | 1509 | Parent::setGraph(ugraph); |
---|
| 1510 | Parent::setEdgeFilterMap(edge_filter); |
---|
[650] | 1511 | } |
---|
| 1512 | |
---|
[660] | 1513 | typedef typename Parent::Edge Edge; |
---|
| 1514 | |
---|
[2034] | 1515 | /// \brief Gives back the residual capacity of the edge. |
---|
| 1516 | /// |
---|
| 1517 | /// Gives back the residual capacity of the edge. |
---|
| 1518 | Number rescap(const Edge& edge) const { |
---|
| 1519 | if (UGraph::direction(edge)) { |
---|
| 1520 | return (*capacity)[edge]-(*flow)[edge]; |
---|
| 1521 | } else { |
---|
| 1522 | return (*flow)[edge]; |
---|
| 1523 | } |
---|
| 1524 | } |
---|
| 1525 | |
---|
| 1526 | /// \brief Augment on the given edge in the residual graph. |
---|
| 1527 | /// |
---|
| 1528 | /// Augment on the given edge in the residual graph. It increase |
---|
| 1529 | /// or decrease the flow on the original edge depend on the direction |
---|
| 1530 | /// of the residual edge. |
---|
[660] | 1531 | void augment(const Edge& e, Number a) const { |
---|
[1991] | 1532 | if (UGraph::direction(e)) { |
---|
[2034] | 1533 | flow->set(e, (*flow)[e] + a); |
---|
[1991] | 1534 | } else { |
---|
[2034] | 1535 | flow->set(e, (*flow)[e] - a); |
---|
[1991] | 1536 | } |
---|
[650] | 1537 | } |
---|
| 1538 | |
---|
[2034] | 1539 | /// \brief Returns the direction of the edge. |
---|
| 1540 | /// |
---|
| 1541 | /// Returns true when the edge is same oriented as the original edge. |
---|
[1991] | 1542 | static bool forward(const Edge& e) { |
---|
| 1543 | return UGraph::direction(e); |
---|
| 1544 | } |
---|
| 1545 | |
---|
[2034] | 1546 | /// \brief Returns the direction of the edge. |
---|
| 1547 | /// |
---|
| 1548 | /// Returns true when the edge is opposite oriented as the original edge. |
---|
[1991] | 1549 | static bool backward(const Edge& e) { |
---|
| 1550 | return !UGraph::direction(e); |
---|
| 1551 | } |
---|
| 1552 | |
---|
[2034] | 1553 | /// \brief Gives back the forward oriented residual edge. |
---|
| 1554 | /// |
---|
| 1555 | /// Gives back the forward oriented residual edge. |
---|
[1991] | 1556 | static Edge forward(const typename Graph::Edge& e) { |
---|
| 1557 | return UGraph::direct(e, true); |
---|
| 1558 | } |
---|
| 1559 | |
---|
[2034] | 1560 | /// \brief Gives back the backward oriented residual edge. |
---|
| 1561 | /// |
---|
| 1562 | /// Gives back the backward oriented residual edge. |
---|
[1991] | 1563 | static Edge backward(const typename Graph::Edge& e) { |
---|
| 1564 | return UGraph::direct(e, false); |
---|
| 1565 | } |
---|
| 1566 | |
---|
[1951] | 1567 | /// \brief Residual capacity map. |
---|
| 1568 | /// |
---|
| 1569 | /// In generic residual graphs the residual capacity can be obtained |
---|
| 1570 | /// as a map. |
---|
[660] | 1571 | class ResCap { |
---|
| 1572 | protected: |
---|
[1991] | 1573 | const ResGraphAdaptor* res_graph; |
---|
[660] | 1574 | public: |
---|
[987] | 1575 | typedef Number Value; |
---|
| 1576 | typedef Edge Key; |
---|
[1991] | 1577 | ResCap(const ResGraphAdaptor& _res_graph) |
---|
| 1578 | : res_graph(&_res_graph) {} |
---|
| 1579 | |
---|
[2034] | 1580 | Number operator[](const Edge& e) const { |
---|
| 1581 | return res_graph->rescap(e); |
---|
[660] | 1582 | } |
---|
[1991] | 1583 | |
---|
[660] | 1584 | }; |
---|
| 1585 | |
---|
[650] | 1586 | }; |
---|
| 1587 | |
---|
| 1588 | |
---|
[998] | 1589 | |
---|
| 1590 | template <typename _Graph, typename FirstOutEdgesMap> |
---|
[1401] | 1591 | class ErasingFirstGraphAdaptorBase : public GraphAdaptorBase<_Graph> { |
---|
[998] | 1592 | public: |
---|
| 1593 | typedef _Graph Graph; |
---|
[1401] | 1594 | typedef GraphAdaptorBase<_Graph> Parent; |
---|
[998] | 1595 | protected: |
---|
| 1596 | FirstOutEdgesMap* first_out_edges; |
---|
[1401] | 1597 | ErasingFirstGraphAdaptorBase() : Parent(), |
---|
[998] | 1598 | first_out_edges(0) { } |
---|
| 1599 | |
---|
| 1600 | void setFirstOutEdgesMap(FirstOutEdgesMap& _first_out_edges) { |
---|
| 1601 | first_out_edges=&_first_out_edges; |
---|
| 1602 | } |
---|
| 1603 | |
---|
| 1604 | public: |
---|
| 1605 | |
---|
| 1606 | typedef typename Parent::Node Node; |
---|
| 1607 | typedef typename Parent::Edge Edge; |
---|
| 1608 | |
---|
| 1609 | void firstOut(Edge& i, const Node& n) const { |
---|
| 1610 | i=(*first_out_edges)[n]; |
---|
| 1611 | } |
---|
| 1612 | |
---|
| 1613 | void erase(const Edge& e) const { |
---|
| 1614 | Node n=source(e); |
---|
| 1615 | Edge f=e; |
---|
| 1616 | Parent::nextOut(f); |
---|
| 1617 | first_out_edges->set(n, f); |
---|
| 1618 | } |
---|
| 1619 | }; |
---|
| 1620 | |
---|
| 1621 | |
---|
[2081] | 1622 | ///\ingroup graph_adaptors |
---|
| 1623 | /// |
---|
[1951] | 1624 | ///\brief For blocking flows. |
---|
| 1625 | /// |
---|
| 1626 | ///This graph adaptor is used for on-the-fly |
---|
| 1627 | ///Dinits blocking flow computations. |
---|
| 1628 | ///For each node, an out-edge is stored which is used when the |
---|
| 1629 | ///\code |
---|
| 1630 | ///OutEdgeIt& first(OutEdgeIt&, const Node&) |
---|
| 1631 | ///\endcode |
---|
| 1632 | ///is called. |
---|
| 1633 | /// |
---|
| 1634 | ///\author Marton Makai |
---|
| 1635 | /// |
---|
[998] | 1636 | template <typename _Graph, typename FirstOutEdgesMap> |
---|
[1401] | 1637 | class ErasingFirstGraphAdaptor : |
---|
[1979] | 1638 | public GraphAdaptorExtender< |
---|
[1401] | 1639 | ErasingFirstGraphAdaptorBase<_Graph, FirstOutEdgesMap> > { |
---|
[650] | 1640 | public: |
---|
[998] | 1641 | typedef _Graph Graph; |
---|
[1979] | 1642 | typedef GraphAdaptorExtender< |
---|
[1401] | 1643 | ErasingFirstGraphAdaptorBase<_Graph, FirstOutEdgesMap> > Parent; |
---|
| 1644 | ErasingFirstGraphAdaptor(Graph& _graph, |
---|
[998] | 1645 | FirstOutEdgesMap& _first_out_edges) { |
---|
| 1646 | setGraph(_graph); |
---|
| 1647 | setFirstOutEdgesMap(_first_out_edges); |
---|
| 1648 | } |
---|
[1019] | 1649 | |
---|
[998] | 1650 | }; |
---|
[556] | 1651 | |
---|
[2079] | 1652 | /// \brief Base class for split graph adaptor |
---|
| 1653 | /// |
---|
| 1654 | /// Base class of split graph adaptor. In most case you do not need to |
---|
| 1655 | /// use it directly but the documented member functions of this class can |
---|
| 1656 | /// be used with the SplitGraphAdaptor class. |
---|
| 1657 | /// \sa SplitGraphAdaptor |
---|
| 1658 | template <typename _Graph> |
---|
| 1659 | class SplitGraphAdaptorBase |
---|
| 1660 | : public GraphAdaptorBase<const _Graph> { |
---|
| 1661 | public: |
---|
[1697] | 1662 | |
---|
[2079] | 1663 | typedef _Graph Graph; |
---|
| 1664 | |
---|
| 1665 | typedef GraphAdaptorBase<const _Graph> Parent; |
---|
| 1666 | |
---|
| 1667 | typedef typename Graph::Node GraphNode; |
---|
| 1668 | typedef typename Graph::Edge GraphEdge; |
---|
| 1669 | |
---|
| 1670 | class Node; |
---|
| 1671 | class Edge; |
---|
| 1672 | |
---|
| 1673 | template <typename T> class NodeMap; |
---|
| 1674 | template <typename T> class EdgeMap; |
---|
[1697] | 1675 | |
---|
| 1676 | |
---|
[2079] | 1677 | class Node : public GraphNode { |
---|
| 1678 | friend class SplitGraphAdaptorBase; |
---|
| 1679 | template <typename T> friend class NodeMap; |
---|
| 1680 | private: |
---|
[1697] | 1681 | |
---|
[2079] | 1682 | bool in_node; |
---|
| 1683 | Node(GraphNode _node, bool _in_node) |
---|
| 1684 | : GraphNode(_node), in_node(_in_node) {} |
---|
[1697] | 1685 | |
---|
[2079] | 1686 | public: |
---|
[1697] | 1687 | |
---|
[2079] | 1688 | Node() {} |
---|
| 1689 | Node(Invalid) : GraphNode(INVALID), in_node(true) {} |
---|
| 1690 | |
---|
| 1691 | bool operator==(const Node& node) const { |
---|
| 1692 | return GraphNode::operator==(node) && in_node == node.in_node; |
---|
| 1693 | } |
---|
[1697] | 1694 | |
---|
[2079] | 1695 | bool operator!=(const Node& node) const { |
---|
| 1696 | return !(*this == node); |
---|
| 1697 | } |
---|
[1697] | 1698 | |
---|
[2079] | 1699 | bool operator<(const Node& node) const { |
---|
| 1700 | return GraphNode::operator<(node) || |
---|
| 1701 | (GraphNode::operator==(node) && in_node < node.in_node); |
---|
| 1702 | } |
---|
| 1703 | }; |
---|
[1697] | 1704 | |
---|
[2079] | 1705 | class Edge { |
---|
| 1706 | friend class SplitGraphAdaptorBase; |
---|
| 1707 | template <typename T> friend class EdgeMap; |
---|
| 1708 | private: |
---|
| 1709 | typedef BiVariant<GraphEdge, GraphNode> EdgeImpl; |
---|
[1697] | 1710 | |
---|
[2079] | 1711 | explicit Edge(const GraphEdge& edge) : item(edge) {} |
---|
| 1712 | explicit Edge(const GraphNode& node) : item(node) {} |
---|
| 1713 | |
---|
| 1714 | EdgeImpl item; |
---|
[1697] | 1715 | |
---|
[2079] | 1716 | public: |
---|
| 1717 | Edge() {} |
---|
| 1718 | Edge(Invalid) : item(GraphEdge(INVALID)) {} |
---|
| 1719 | |
---|
| 1720 | bool operator==(const Edge& edge) const { |
---|
| 1721 | if (item.firstState()) { |
---|
| 1722 | if (edge.item.firstState()) { |
---|
| 1723 | return item.first() == edge.item.first(); |
---|
| 1724 | } |
---|
| 1725 | } else { |
---|
| 1726 | if (edge.item.secondState()) { |
---|
| 1727 | return item.second() == edge.item.second(); |
---|
| 1728 | } |
---|
| 1729 | } |
---|
| 1730 | return false; |
---|
| 1731 | } |
---|
[1697] | 1732 | |
---|
[2079] | 1733 | bool operator!=(const Edge& edge) const { |
---|
| 1734 | return !(*this == edge); |
---|
| 1735 | } |
---|
[1697] | 1736 | |
---|
[2079] | 1737 | bool operator<(const Edge& edge) const { |
---|
| 1738 | if (item.firstState()) { |
---|
| 1739 | if (edge.item.firstState()) { |
---|
| 1740 | return item.first() < edge.item.first(); |
---|
| 1741 | } |
---|
| 1742 | return false; |
---|
| 1743 | } else { |
---|
| 1744 | if (edge.item.secondState()) { |
---|
| 1745 | return item.second() < edge.item.second(); |
---|
| 1746 | } |
---|
| 1747 | return true; |
---|
| 1748 | } |
---|
| 1749 | } |
---|
[1697] | 1750 | |
---|
[2079] | 1751 | operator GraphEdge() const { return item.first(); } |
---|
| 1752 | operator GraphNode() const { return item.second(); } |
---|
[1697] | 1753 | |
---|
[2079] | 1754 | }; |
---|
[1697] | 1755 | |
---|
[2079] | 1756 | void first(Node& node) const { |
---|
| 1757 | Parent::first(node); |
---|
| 1758 | node.in_node = true; |
---|
| 1759 | } |
---|
[1697] | 1760 | |
---|
[2079] | 1761 | void next(Node& node) const { |
---|
| 1762 | if (node.in_node) { |
---|
| 1763 | node.in_node = false; |
---|
| 1764 | } else { |
---|
| 1765 | node.in_node = true; |
---|
| 1766 | Parent::next(node); |
---|
| 1767 | } |
---|
| 1768 | } |
---|
[1697] | 1769 | |
---|
[2079] | 1770 | void first(Edge& edge) const { |
---|
| 1771 | edge.item.setSecond(); |
---|
| 1772 | Parent::first(edge.item.second()); |
---|
| 1773 | if (edge.item.second() == INVALID) { |
---|
| 1774 | edge.item.setFirst(); |
---|
| 1775 | Parent::first(edge.item.first()); |
---|
| 1776 | } |
---|
| 1777 | } |
---|
[1697] | 1778 | |
---|
[2079] | 1779 | void next(Edge& edge) const { |
---|
| 1780 | if (edge.item.secondState()) { |
---|
| 1781 | Parent::next(edge.item.second()); |
---|
| 1782 | if (edge.item.second() == INVALID) { |
---|
| 1783 | edge.item.setFirst(); |
---|
| 1784 | Parent::first(edge.item.first()); |
---|
| 1785 | } |
---|
| 1786 | } else { |
---|
| 1787 | Parent::next(edge.item.first()); |
---|
| 1788 | } |
---|
| 1789 | } |
---|
[1697] | 1790 | |
---|
[2079] | 1791 | void firstOut(Edge& edge, const Node& node) const { |
---|
| 1792 | if (node.in_node) { |
---|
| 1793 | edge.item.setSecond(node); |
---|
| 1794 | } else { |
---|
| 1795 | edge.item.setFirst(); |
---|
| 1796 | Parent::firstOut(edge.item.first(), node); |
---|
| 1797 | } |
---|
| 1798 | } |
---|
[1697] | 1799 | |
---|
[2079] | 1800 | void nextOut(Edge& edge) const { |
---|
| 1801 | if (!edge.item.firstState()) { |
---|
| 1802 | edge.item.setFirst(INVALID); |
---|
| 1803 | } else { |
---|
| 1804 | Parent::nextOut(edge.item.first()); |
---|
| 1805 | } |
---|
| 1806 | } |
---|
[1697] | 1807 | |
---|
[2079] | 1808 | void firstIn(Edge& edge, const Node& node) const { |
---|
| 1809 | if (!node.in_node) { |
---|
| 1810 | edge.item.setSecond(node); |
---|
| 1811 | } else { |
---|
| 1812 | edge.item.setFirst(); |
---|
| 1813 | Parent::firstIn(edge.item.first(), node); |
---|
| 1814 | } |
---|
| 1815 | } |
---|
[1697] | 1816 | |
---|
[2079] | 1817 | void nextIn(Edge& edge) const { |
---|
| 1818 | if (!edge.item.firstState()) { |
---|
| 1819 | edge.item.setFirst(INVALID); |
---|
| 1820 | } else { |
---|
| 1821 | Parent::nextIn(edge.item.first()); |
---|
| 1822 | } |
---|
| 1823 | } |
---|
[1697] | 1824 | |
---|
[2079] | 1825 | Node source(const Edge& edge) const { |
---|
| 1826 | if (edge.item.firstState()) { |
---|
| 1827 | return Node(Parent::source(edge.item.first()), false); |
---|
| 1828 | } else { |
---|
| 1829 | return Node(edge.item.second(), true); |
---|
| 1830 | } |
---|
| 1831 | } |
---|
[1697] | 1832 | |
---|
[2079] | 1833 | Node target(const Edge& edge) const { |
---|
| 1834 | if (edge.item.firstState()) { |
---|
| 1835 | return Node(Parent::target(edge.item.first()), true); |
---|
| 1836 | } else { |
---|
| 1837 | return Node(edge.item.second(), false); |
---|
| 1838 | } |
---|
| 1839 | } |
---|
[1697] | 1840 | |
---|
[2079] | 1841 | int id(const Node& node) const { |
---|
| 1842 | return (Parent::id(node) << 1) | (node.in_node ? 0 : 1); |
---|
| 1843 | } |
---|
| 1844 | Node nodeFromId(int id) const { |
---|
| 1845 | return Node(Parent::nodeFromId(id >> 1), (id & 1) == 0); |
---|
| 1846 | } |
---|
| 1847 | int maxNodeId() const { |
---|
| 1848 | return 2 * Parent::maxNodeId() + 1; |
---|
| 1849 | } |
---|
[1697] | 1850 | |
---|
[2079] | 1851 | int id(const Edge& edge) const { |
---|
| 1852 | if (edge.item.firstState()) { |
---|
| 1853 | return Parent::id(edge.item.first()) << 1; |
---|
| 1854 | } else { |
---|
| 1855 | return (Parent::id(edge.item.second()) << 1) | 1; |
---|
| 1856 | } |
---|
| 1857 | } |
---|
| 1858 | Edge edgeFromId(int id) const { |
---|
| 1859 | if ((id & 1) == 0) { |
---|
| 1860 | return Edge(Parent::edgeFromId(id >> 1)); |
---|
| 1861 | } else { |
---|
| 1862 | return Edge(Parent::nodeFromId(id >> 1)); |
---|
| 1863 | } |
---|
| 1864 | } |
---|
| 1865 | int maxEdgeId() const { |
---|
| 1866 | return std::max(Parent::maxNodeId() << 1, |
---|
| 1867 | (Parent::maxEdgeId() << 1) | 1); |
---|
| 1868 | } |
---|
[1697] | 1869 | |
---|
[2079] | 1870 | /// \brief Returns true when the node is in-node. |
---|
| 1871 | /// |
---|
| 1872 | /// Returns true when the node is in-node. |
---|
| 1873 | static bool inNode(const Node& node) { |
---|
| 1874 | return node.in_node; |
---|
| 1875 | } |
---|
[1697] | 1876 | |
---|
[2079] | 1877 | /// \brief Returns true when the node is out-node. |
---|
| 1878 | /// |
---|
| 1879 | /// Returns true when the node is out-node. |
---|
| 1880 | static bool outNode(const Node& node) { |
---|
| 1881 | return !node.in_node; |
---|
| 1882 | } |
---|
[1697] | 1883 | |
---|
[2079] | 1884 | /// \brief Returns true when the edge is edge in the original graph. |
---|
| 1885 | /// |
---|
| 1886 | /// Returns true when the edge is edge in the original graph. |
---|
| 1887 | static bool origEdge(const Edge& edge) { |
---|
| 1888 | return edge.item.firstState(); |
---|
| 1889 | } |
---|
[1697] | 1890 | |
---|
[2079] | 1891 | /// \brief Returns true when the edge binds an in-node and an out-node. |
---|
| 1892 | /// |
---|
| 1893 | /// Returns true when the edge binds an in-node and an out-node. |
---|
| 1894 | static bool bindEdge(const Edge& edge) { |
---|
| 1895 | return edge.item.secondState(); |
---|
| 1896 | } |
---|
[1697] | 1897 | |
---|
[2079] | 1898 | /// \brief Gives back the in-node created from the \c node. |
---|
| 1899 | /// |
---|
| 1900 | /// Gives back the in-node created from the \c node. |
---|
| 1901 | static Node inNode(const GraphNode& node) { |
---|
| 1902 | return Node(node, true); |
---|
| 1903 | } |
---|
| 1904 | |
---|
| 1905 | /// \brief Gives back the out-node created from the \c node. |
---|
| 1906 | /// |
---|
| 1907 | /// Gives back the out-node created from the \c node. |
---|
| 1908 | static Node outNode(const GraphNode& node) { |
---|
| 1909 | return Node(node, false); |
---|
| 1910 | } |
---|
| 1911 | |
---|
| 1912 | /// \brief Gives back the edge binds the two part of the node. |
---|
| 1913 | /// |
---|
| 1914 | /// Gives back the edge binds the two part of the node. |
---|
| 1915 | static Edge edge(const GraphNode& node) { |
---|
| 1916 | return Edge(node); |
---|
| 1917 | } |
---|
| 1918 | |
---|
| 1919 | /// \brief Gives back the edge of the original edge. |
---|
| 1920 | /// |
---|
| 1921 | /// Gives back the edge of the original edge. |
---|
| 1922 | static Edge edge(const GraphEdge& edge) { |
---|
| 1923 | return Edge(edge); |
---|
| 1924 | } |
---|
| 1925 | |
---|
| 1926 | typedef True NodeNumTag; |
---|
| 1927 | |
---|
| 1928 | int nodeNum() const { |
---|
| 1929 | return 2 * countNodes(*Parent::graph); |
---|
| 1930 | } |
---|
| 1931 | |
---|
| 1932 | typedef True EdgeNumTag; |
---|
[1697] | 1933 | |
---|
[2079] | 1934 | int edgeNum() const { |
---|
| 1935 | return countEdges(*Parent::graph) + countNodes(*Parent::graph); |
---|
| 1936 | } |
---|
[1697] | 1937 | |
---|
[2079] | 1938 | typedef True FindEdgeTag; |
---|
| 1939 | |
---|
| 1940 | Edge findEdge(const Node& source, const Node& target, |
---|
| 1941 | const Edge& prev = INVALID) const { |
---|
| 1942 | if (inNode(source)) { |
---|
| 1943 | if (outNode(target)) { |
---|
| 1944 | if ((GraphNode&)source == (GraphNode&)target && prev == INVALID) { |
---|
| 1945 | return Edge(source); |
---|
| 1946 | } |
---|
| 1947 | } |
---|
| 1948 | } else { |
---|
| 1949 | if (inNode(target)) { |
---|
| 1950 | return Edge(findEdge(*Parent::graph, source, target, prev)); |
---|
| 1951 | } |
---|
| 1952 | } |
---|
| 1953 | return INVALID; |
---|
| 1954 | } |
---|
[1697] | 1955 | |
---|
[2079] | 1956 | template <typename T> |
---|
| 1957 | class NodeMap : public MapBase<Node, T> { |
---|
| 1958 | typedef typename Parent::template NodeMap<T> NodeImpl; |
---|
| 1959 | public: |
---|
| 1960 | NodeMap(const SplitGraphAdaptorBase& _graph) |
---|
| 1961 | : inNodeMap(_graph), outNodeMap(_graph) {} |
---|
| 1962 | NodeMap(const SplitGraphAdaptorBase& _graph, const T& t) |
---|
| 1963 | : inNodeMap(_graph, t), outNodeMap(_graph, t) {} |
---|
[1697] | 1964 | |
---|
[2079] | 1965 | void set(const Node& key, const T& val) { |
---|
| 1966 | if (SplitGraphAdaptorBase::inNode(key)) { inNodeMap.set(key, val); } |
---|
| 1967 | else {outNodeMap.set(key, val); } |
---|
| 1968 | } |
---|
[1697] | 1969 | |
---|
[2079] | 1970 | typename MapTraits<NodeImpl>::ReturnValue |
---|
| 1971 | operator[](const Node& key) { |
---|
| 1972 | if (SplitGraphAdaptorBase::inNode(key)) { return inNodeMap[key]; } |
---|
| 1973 | else { return outNodeMap[key]; } |
---|
| 1974 | } |
---|
[1697] | 1975 | |
---|
[2079] | 1976 | typename MapTraits<NodeImpl>::ConstReturnValue |
---|
| 1977 | operator[](const Node& key) const { |
---|
| 1978 | if (SplitGraphAdaptorBase::inNode(key)) { return inNodeMap[key]; } |
---|
| 1979 | else { return outNodeMap[key]; } |
---|
| 1980 | } |
---|
[1697] | 1981 | |
---|
[2079] | 1982 | private: |
---|
| 1983 | NodeImpl inNodeMap, outNodeMap; |
---|
| 1984 | }; |
---|
[1697] | 1985 | |
---|
[2079] | 1986 | template <typename T> |
---|
| 1987 | class EdgeMap : public MapBase<Edge, T> { |
---|
| 1988 | typedef typename Parent::template EdgeMap<T> EdgeMapImpl; |
---|
| 1989 | typedef typename Parent::template NodeMap<T> NodeMapImpl; |
---|
| 1990 | public: |
---|
| 1991 | |
---|
| 1992 | EdgeMap(const SplitGraphAdaptorBase& _graph) |
---|
| 1993 | : edge_map(_graph), node_map(_graph) {} |
---|
| 1994 | EdgeMap(const SplitGraphAdaptorBase& _graph, const T& t) |
---|
| 1995 | : edge_map(_graph, t), node_map(_graph, t) {} |
---|
[1697] | 1996 | |
---|
[2079] | 1997 | void set(const Edge& key, const T& val) { |
---|
| 1998 | if (SplitGraphAdaptorBase::origEdge(key)) { |
---|
| 1999 | edge_map.set(key.item.first(), val); |
---|
| 2000 | } else { |
---|
| 2001 | node_map.set(key.item.second(), val); |
---|
| 2002 | } |
---|
| 2003 | } |
---|
[1697] | 2004 | |
---|
[2079] | 2005 | typename MapTraits<EdgeMapImpl>::ReturnValue |
---|
| 2006 | operator[](const Edge& key) { |
---|
| 2007 | if (SplitGraphAdaptorBase::origEdge(key)) { |
---|
| 2008 | return edge_map[key.item.first()]; |
---|
| 2009 | } else { |
---|
| 2010 | return node_map[key.item.second()]; |
---|
| 2011 | } |
---|
| 2012 | } |
---|
[1697] | 2013 | |
---|
[2079] | 2014 | typename MapTraits<EdgeMapImpl>::ConstReturnValue |
---|
| 2015 | operator[](const Edge& key) const { |
---|
| 2016 | if (SplitGraphAdaptorBase::origEdge(key)) { |
---|
| 2017 | return edge_map[key.item.first()]; |
---|
| 2018 | } else { |
---|
| 2019 | return node_map[key.item.second()]; |
---|
| 2020 | } |
---|
| 2021 | } |
---|
[1697] | 2022 | |
---|
[2079] | 2023 | private: |
---|
| 2024 | typename Parent::template EdgeMap<T> edge_map; |
---|
| 2025 | typename Parent::template NodeMap<T> node_map; |
---|
| 2026 | }; |
---|
[1697] | 2027 | |
---|
| 2028 | |
---|
[2079] | 2029 | }; |
---|
[1697] | 2030 | |
---|
[2079] | 2031 | template <typename _Graph, typename NodeEnable = void, |
---|
| 2032 | typename EdgeEnable = void> |
---|
| 2033 | class AlterableSplitGraphAdaptor |
---|
| 2034 | : public GraphAdaptorExtender<SplitGraphAdaptorBase<_Graph> > { |
---|
| 2035 | public: |
---|
[1697] | 2036 | |
---|
[2079] | 2037 | typedef GraphAdaptorExtender<SplitGraphAdaptorBase<_Graph> > Parent; |
---|
| 2038 | typedef _Graph Graph; |
---|
[1697] | 2039 | |
---|
[2079] | 2040 | typedef typename Graph::Node GraphNode; |
---|
| 2041 | typedef typename Graph::Node GraphEdge; |
---|
[1697] | 2042 | |
---|
[2079] | 2043 | protected: |
---|
| 2044 | |
---|
| 2045 | AlterableSplitGraphAdaptor() : Parent() {} |
---|
| 2046 | |
---|
| 2047 | public: |
---|
| 2048 | |
---|
| 2049 | typedef InvalidType NodeNotifier; |
---|
| 2050 | typedef InvalidType EdgeNotifier; |
---|
| 2051 | |
---|
| 2052 | }; |
---|
| 2053 | |
---|
| 2054 | template <typename _Graph, typename EdgeEnable> |
---|
| 2055 | class AlterableSplitGraphAdaptor< |
---|
| 2056 | _Graph, |
---|
| 2057 | typename enable_if<typename _Graph::NodeNotifier::Notifier>::type, |
---|
| 2058 | EdgeEnable> |
---|
| 2059 | : public GraphAdaptorExtender<SplitGraphAdaptorBase<_Graph> > { |
---|
| 2060 | public: |
---|
| 2061 | |
---|
| 2062 | typedef GraphAdaptorExtender<SplitGraphAdaptorBase<_Graph> > Parent; |
---|
| 2063 | typedef _Graph Graph; |
---|
| 2064 | |
---|
| 2065 | typedef typename Graph::Node GraphNode; |
---|
| 2066 | typedef typename Graph::Edge GraphEdge; |
---|
| 2067 | |
---|
| 2068 | typedef typename Parent::Node Node; |
---|
| 2069 | typedef typename Parent::Edge Edge; |
---|
| 2070 | |
---|
| 2071 | protected: |
---|
| 2072 | |
---|
| 2073 | AlterableSplitGraphAdaptor() |
---|
| 2074 | : Parent(), node_notifier(*this), node_notifier_proxy(*this) {} |
---|
| 2075 | |
---|
| 2076 | void setGraph(_Graph& graph) { |
---|
| 2077 | Parent::setGraph(graph); |
---|
| 2078 | node_notifier_proxy.setNotifier(graph.getNotifier(GraphNode())); |
---|
| 2079 | } |
---|
| 2080 | |
---|
| 2081 | public: |
---|
| 2082 | |
---|
| 2083 | ~AlterableSplitGraphAdaptor() { |
---|
| 2084 | node_notifier.clear(); |
---|
| 2085 | } |
---|
| 2086 | |
---|
| 2087 | typedef AlterationNotifier<AlterableSplitGraphAdaptor, Node> NodeNotifier; |
---|
| 2088 | typedef InvalidType EdgeNotifier; |
---|
| 2089 | |
---|
| 2090 | NodeNotifier& getNotifier(Node) const { return node_notifier; } |
---|
| 2091 | |
---|
| 2092 | protected: |
---|
| 2093 | |
---|
| 2094 | class NodeNotifierProxy : public Graph::NodeNotifier::ObserverBase { |
---|
| 2095 | public: |
---|
| 2096 | |
---|
| 2097 | typedef typename Graph::NodeNotifier::ObserverBase Parent; |
---|
| 2098 | typedef AlterableSplitGraphAdaptor AdaptorBase; |
---|
[1697] | 2099 | |
---|
[2079] | 2100 | NodeNotifierProxy(const AdaptorBase& _adaptor) |
---|
| 2101 | : Parent(), adaptor(&_adaptor) { |
---|
| 2102 | } |
---|
| 2103 | |
---|
| 2104 | virtual ~NodeNotifierProxy() { |
---|
| 2105 | if (Parent::attached()) { |
---|
| 2106 | Parent::detach(); |
---|
| 2107 | } |
---|
| 2108 | } |
---|
| 2109 | |
---|
| 2110 | void setNotifier(typename Graph::NodeNotifier& graph_notifier) { |
---|
| 2111 | Parent::attach(graph_notifier); |
---|
| 2112 | } |
---|
| 2113 | |
---|
[1697] | 2114 | |
---|
[2079] | 2115 | protected: |
---|
| 2116 | |
---|
| 2117 | virtual void add(const GraphNode& gn) { |
---|
| 2118 | std::vector<Node> nodes; |
---|
| 2119 | nodes.push_back(AdaptorBase::Parent::inNode(gn)); |
---|
| 2120 | nodes.push_back(AdaptorBase::Parent::outNode(gn)); |
---|
| 2121 | adaptor->getNotifier(Node()).add(nodes); |
---|
| 2122 | } |
---|
| 2123 | |
---|
| 2124 | virtual void add(const std::vector<GraphNode>& gn) { |
---|
| 2125 | std::vector<Node> nodes; |
---|
| 2126 | for (int i = 0; i < (int)gn.size(); ++i) { |
---|
| 2127 | nodes.push_back(AdaptorBase::Parent::inNode(gn[i])); |
---|
| 2128 | nodes.push_back(AdaptorBase::Parent::outNode(gn[i])); |
---|
| 2129 | } |
---|
| 2130 | adaptor->getNotifier(Node()).add(nodes); |
---|
| 2131 | } |
---|
| 2132 | |
---|
| 2133 | virtual void erase(const GraphNode& gn) { |
---|
| 2134 | std::vector<Node> nodes; |
---|
| 2135 | nodes.push_back(AdaptorBase::Parent::inNode(gn)); |
---|
| 2136 | nodes.push_back(AdaptorBase::Parent::outNode(gn)); |
---|
| 2137 | adaptor->getNotifier(Node()).erase(nodes); |
---|
| 2138 | } |
---|
| 2139 | |
---|
| 2140 | virtual void erase(const std::vector<GraphNode>& gn) { |
---|
| 2141 | std::vector<Node> nodes; |
---|
| 2142 | for (int i = 0; i < (int)gn.size(); ++i) { |
---|
| 2143 | nodes.push_back(AdaptorBase::Parent::inNode(gn[i])); |
---|
| 2144 | nodes.push_back(AdaptorBase::Parent::outNode(gn[i])); |
---|
| 2145 | } |
---|
| 2146 | adaptor->getNotifier(Node()).erase(nodes); |
---|
| 2147 | } |
---|
| 2148 | virtual void build() { |
---|
| 2149 | adaptor->getNotifier(Node()).build(); |
---|
| 2150 | } |
---|
| 2151 | virtual void clear() { |
---|
| 2152 | adaptor->getNotifier(Node()).clear(); |
---|
| 2153 | } |
---|
| 2154 | |
---|
| 2155 | const AdaptorBase* adaptor; |
---|
| 2156 | }; |
---|
| 2157 | |
---|
| 2158 | |
---|
| 2159 | mutable NodeNotifier node_notifier; |
---|
| 2160 | |
---|
| 2161 | NodeNotifierProxy node_notifier_proxy; |
---|
| 2162 | |
---|
| 2163 | }; |
---|
| 2164 | |
---|
| 2165 | template <typename _Graph> |
---|
| 2166 | class AlterableSplitGraphAdaptor< |
---|
| 2167 | _Graph, |
---|
| 2168 | typename enable_if<typename _Graph::NodeNotifier::Notifier>::type, |
---|
| 2169 | typename enable_if<typename _Graph::EdgeNotifier::Notifier>::type> |
---|
| 2170 | : public GraphAdaptorExtender<SplitGraphAdaptorBase<_Graph> > { |
---|
| 2171 | public: |
---|
| 2172 | |
---|
| 2173 | typedef GraphAdaptorExtender<SplitGraphAdaptorBase<_Graph> > Parent; |
---|
| 2174 | typedef _Graph Graph; |
---|
| 2175 | |
---|
| 2176 | typedef typename Graph::Node GraphNode; |
---|
| 2177 | typedef typename Graph::Edge GraphEdge; |
---|
| 2178 | |
---|
| 2179 | typedef typename Parent::Node Node; |
---|
| 2180 | typedef typename Parent::Edge Edge; |
---|
| 2181 | |
---|
| 2182 | protected: |
---|
| 2183 | |
---|
| 2184 | AlterableSplitGraphAdaptor() |
---|
| 2185 | : Parent(), node_notifier(*this), edge_notifier(*this), |
---|
| 2186 | node_notifier_proxy(*this), edge_notifier_proxy(*this) {} |
---|
| 2187 | |
---|
| 2188 | void setGraph(_Graph& graph) { |
---|
| 2189 | Parent::setGraph(graph); |
---|
| 2190 | node_notifier_proxy.setNotifier(graph.getNotifier(GraphNode())); |
---|
| 2191 | edge_notifier_proxy.setNotifier(graph.getNotifier(GraphEdge())); |
---|
| 2192 | } |
---|
| 2193 | |
---|
| 2194 | public: |
---|
| 2195 | |
---|
| 2196 | ~AlterableSplitGraphAdaptor() { |
---|
| 2197 | node_notifier.clear(); |
---|
| 2198 | edge_notifier.clear(); |
---|
| 2199 | } |
---|
| 2200 | |
---|
| 2201 | typedef AlterationNotifier<AlterableSplitGraphAdaptor, Node> NodeNotifier; |
---|
| 2202 | typedef AlterationNotifier<AlterableSplitGraphAdaptor, Edge> EdgeNotifier; |
---|
| 2203 | |
---|
| 2204 | NodeNotifier& getNotifier(Node) const { return node_notifier; } |
---|
| 2205 | EdgeNotifier& getNotifier(Edge) const { return edge_notifier; } |
---|
| 2206 | |
---|
| 2207 | protected: |
---|
| 2208 | |
---|
| 2209 | class NodeNotifierProxy : public Graph::NodeNotifier::ObserverBase { |
---|
| 2210 | public: |
---|
[1697] | 2211 | |
---|
[2079] | 2212 | typedef typename Graph::NodeNotifier::ObserverBase Parent; |
---|
| 2213 | typedef AlterableSplitGraphAdaptor AdaptorBase; |
---|
| 2214 | |
---|
| 2215 | NodeNotifierProxy(const AdaptorBase& _adaptor) |
---|
| 2216 | : Parent(), adaptor(&_adaptor) { |
---|
| 2217 | } |
---|
[1697] | 2218 | |
---|
[2079] | 2219 | virtual ~NodeNotifierProxy() { |
---|
| 2220 | if (Parent::attached()) { |
---|
| 2221 | Parent::detach(); |
---|
| 2222 | } |
---|
| 2223 | } |
---|
[1697] | 2224 | |
---|
[2079] | 2225 | void setNotifier(typename Graph::NodeNotifier& graph_notifier) { |
---|
| 2226 | Parent::attach(graph_notifier); |
---|
| 2227 | } |
---|
[1697] | 2228 | |
---|
[2079] | 2229 | |
---|
| 2230 | protected: |
---|
[1697] | 2231 | |
---|
[2079] | 2232 | virtual void add(const GraphNode& gn) { |
---|
| 2233 | std::vector<Node> nodes; |
---|
| 2234 | nodes.push_back(AdaptorBase::Parent::inNode(gn)); |
---|
| 2235 | nodes.push_back(AdaptorBase::Parent::outNode(gn)); |
---|
| 2236 | adaptor->getNotifier(Node()).add(nodes); |
---|
| 2237 | adaptor->getNotifier(Edge()).add(AdaptorBase::Parent::edge(gn)); |
---|
| 2238 | } |
---|
| 2239 | virtual void add(const std::vector<GraphNode>& gn) { |
---|
| 2240 | std::vector<Node> nodes; |
---|
| 2241 | std::vector<Edge> edges; |
---|
| 2242 | for (int i = 0; i < (int)gn.size(); ++i) { |
---|
| 2243 | edges.push_back(AdaptorBase::Parent::edge(gn[i])); |
---|
| 2244 | nodes.push_back(AdaptorBase::Parent::inNode(gn[i])); |
---|
| 2245 | nodes.push_back(AdaptorBase::Parent::outNode(gn[i])); |
---|
| 2246 | } |
---|
| 2247 | adaptor->getNotifier(Node()).add(nodes); |
---|
| 2248 | adaptor->getNotifier(Edge()).add(edges); |
---|
| 2249 | } |
---|
| 2250 | virtual void erase(const GraphNode& gn) { |
---|
| 2251 | adaptor->getNotifier(Edge()).erase(AdaptorBase::Parent::edge(gn)); |
---|
| 2252 | std::vector<Node> nodes; |
---|
| 2253 | nodes.push_back(AdaptorBase::Parent::inNode(gn)); |
---|
| 2254 | nodes.push_back(AdaptorBase::Parent::outNode(gn)); |
---|
| 2255 | adaptor->getNotifier(Node()).erase(nodes); |
---|
| 2256 | } |
---|
| 2257 | virtual void erase(const std::vector<GraphNode>& gn) { |
---|
| 2258 | std::vector<Node> nodes; |
---|
| 2259 | std::vector<Edge> edges; |
---|
| 2260 | for (int i = 0; i < (int)gn.size(); ++i) { |
---|
| 2261 | edges.push_back(AdaptorBase::Parent::edge(gn[i])); |
---|
| 2262 | nodes.push_back(AdaptorBase::Parent::inNode(gn[i])); |
---|
| 2263 | nodes.push_back(AdaptorBase::Parent::outNode(gn[i])); |
---|
| 2264 | } |
---|
| 2265 | adaptor->getNotifier(Edge()).erase(edges); |
---|
| 2266 | adaptor->getNotifier(Node()).erase(nodes); |
---|
| 2267 | } |
---|
| 2268 | virtual void build() { |
---|
| 2269 | std::vector<Edge> edges; |
---|
| 2270 | const typename Parent::Notifier* notifier = Parent::getNotifier(); |
---|
| 2271 | GraphNode it; |
---|
| 2272 | for (notifier->first(it); it != INVALID; notifier->next(it)) { |
---|
| 2273 | edges.push_back(AdaptorBase::Parent::edge(it)); |
---|
| 2274 | } |
---|
| 2275 | adaptor->getNotifier(Node()).build(); |
---|
| 2276 | adaptor->getNotifier(Edge()).add(edges); |
---|
| 2277 | } |
---|
| 2278 | virtual void clear() { |
---|
| 2279 | std::vector<Edge> edges; |
---|
| 2280 | const typename Parent::Notifier* notifier = Parent::getNotifier(); |
---|
| 2281 | GraphNode it; |
---|
| 2282 | for (notifier->first(it); it != INVALID; notifier->next(it)) { |
---|
| 2283 | edges.push_back(AdaptorBase::Parent::edge(it)); |
---|
| 2284 | } |
---|
| 2285 | adaptor->getNotifier(Edge()).erase(edges); |
---|
| 2286 | adaptor->getNotifier(Node()).clear(); |
---|
| 2287 | } |
---|
[1697] | 2288 | |
---|
[2079] | 2289 | const AdaptorBase* adaptor; |
---|
| 2290 | }; |
---|
[1697] | 2291 | |
---|
[2079] | 2292 | class EdgeNotifierProxy : public Graph::EdgeNotifier::ObserverBase { |
---|
| 2293 | public: |
---|
| 2294 | |
---|
| 2295 | typedef typename Graph::EdgeNotifier::ObserverBase Parent; |
---|
| 2296 | typedef AlterableSplitGraphAdaptor AdaptorBase; |
---|
[1697] | 2297 | |
---|
[2079] | 2298 | EdgeNotifierProxy(const AdaptorBase& _adaptor) |
---|
| 2299 | : Parent(), adaptor(&_adaptor) { |
---|
| 2300 | } |
---|
[1697] | 2301 | |
---|
[2079] | 2302 | virtual ~EdgeNotifierProxy() { |
---|
| 2303 | if (Parent::attached()) { |
---|
| 2304 | Parent::detach(); |
---|
| 2305 | } |
---|
| 2306 | } |
---|
[1697] | 2307 | |
---|
[2079] | 2308 | void setNotifier(typename Graph::EdgeNotifier& graph_notifier) { |
---|
| 2309 | Parent::attach(graph_notifier); |
---|
| 2310 | } |
---|
[1697] | 2311 | |
---|
[2079] | 2312 | |
---|
| 2313 | protected: |
---|
[1697] | 2314 | |
---|
[2079] | 2315 | virtual void add(const GraphEdge& ge) { |
---|
| 2316 | adaptor->getNotifier(Edge()).add(AdaptorBase::edge(ge)); |
---|
| 2317 | } |
---|
| 2318 | virtual void add(const std::vector<GraphEdge>& ge) { |
---|
| 2319 | std::vector<Edge> edges; |
---|
| 2320 | for (int i = 0; i < (int)ge.size(); ++i) { |
---|
| 2321 | edges.push_back(AdaptorBase::edge(ge[i])); |
---|
| 2322 | } |
---|
| 2323 | adaptor->getNotifier(Edge()).add(edges); |
---|
| 2324 | } |
---|
| 2325 | virtual void erase(const GraphEdge& ge) { |
---|
| 2326 | adaptor->getNotifier(Edge()).erase(AdaptorBase::edge(ge)); |
---|
| 2327 | } |
---|
| 2328 | virtual void erase(const std::vector<GraphEdge>& ge) { |
---|
| 2329 | std::vector<Edge> edges; |
---|
| 2330 | for (int i = 0; i < (int)ge.size(); ++i) { |
---|
| 2331 | edges.push_back(AdaptorBase::edge(ge[i])); |
---|
| 2332 | } |
---|
| 2333 | adaptor->getNotifier(Edge()).erase(edges); |
---|
| 2334 | } |
---|
| 2335 | virtual void build() { |
---|
| 2336 | std::vector<Edge> edges; |
---|
| 2337 | const typename Parent::Notifier* notifier = Parent::getNotifier(); |
---|
| 2338 | GraphEdge it; |
---|
| 2339 | for (notifier->first(it); it != INVALID; notifier->next(it)) { |
---|
| 2340 | edges.push_back(AdaptorBase::Parent::edge(it)); |
---|
| 2341 | } |
---|
| 2342 | adaptor->getNotifier(Edge()).add(edges); |
---|
| 2343 | } |
---|
| 2344 | virtual void clear() { |
---|
| 2345 | std::vector<Edge> edges; |
---|
| 2346 | const typename Parent::Notifier* notifier = Parent::getNotifier(); |
---|
| 2347 | GraphEdge it; |
---|
| 2348 | for (notifier->first(it); it != INVALID; notifier->next(it)) { |
---|
| 2349 | edges.push_back(AdaptorBase::Parent::edge(it)); |
---|
| 2350 | } |
---|
| 2351 | adaptor->getNotifier(Edge()).erase(edges); |
---|
| 2352 | } |
---|
[1697] | 2353 | |
---|
[2079] | 2354 | const AdaptorBase* adaptor; |
---|
| 2355 | }; |
---|
| 2356 | |
---|
| 2357 | |
---|
| 2358 | mutable NodeNotifier node_notifier; |
---|
| 2359 | mutable EdgeNotifier edge_notifier; |
---|
| 2360 | |
---|
| 2361 | NodeNotifierProxy node_notifier_proxy; |
---|
| 2362 | EdgeNotifierProxy edge_notifier_proxy; |
---|
| 2363 | |
---|
| 2364 | }; |
---|
| 2365 | |
---|
| 2366 | /// \ingroup graph_adaptors |
---|
| 2367 | /// |
---|
[2081] | 2368 | /// \brief Split graph adaptor class |
---|
[2079] | 2369 | /// |
---|
| 2370 | /// This is an graph adaptor which splits all node into an in-node |
---|
| 2371 | /// and an out-node. Formaly, the adaptor replaces each \f$ u \f$ |
---|
| 2372 | /// node in the graph with two node, \f$ u_{in} \f$ node and |
---|
| 2373 | /// \f$ u_{out} \f$ node. If there is an \f$ (v, u) \f$ edge in the |
---|
| 2374 | /// original graph the new target of the edge will be \f$ u_{in} \f$ and |
---|
| 2375 | /// similarly the source of the original \f$ (u, v) \f$ edge will be |
---|
| 2376 | /// \f$ u_{out} \f$. The adaptor will add for each node in the |
---|
| 2377 | /// original graph an additional edge which will connect |
---|
| 2378 | /// \f$ (u_{in}, u_{out}) \f$. |
---|
| 2379 | /// |
---|
| 2380 | /// The aim of this class is to run algorithm with node costs if the |
---|
| 2381 | /// algorithm can use directly just edge costs. In this case we should use |
---|
| 2382 | /// a \c SplitGraphAdaptor and set the node cost of the graph to the |
---|
| 2383 | /// bind edge in the adapted graph. |
---|
| 2384 | /// |
---|
| 2385 | /// By example a maximum flow algoritm can compute how many edge |
---|
| 2386 | /// disjoint paths are in the graph. But we would like to know how |
---|
| 2387 | /// many node disjoint paths are in the graph. First we have to |
---|
| 2388 | /// adapt the graph with the \c SplitGraphAdaptor. Then run the flow |
---|
| 2389 | /// algorithm on the adapted graph. The bottleneck of the flow will |
---|
| 2390 | /// be the bind edges which bounds the flow with the count of the |
---|
| 2391 | /// node disjoint paths. |
---|
| 2392 | /// |
---|
| 2393 | ///\code |
---|
| 2394 | /// |
---|
| 2395 | /// typedef SplitGraphAdaptor<SmartGraph> SGraph; |
---|
| 2396 | /// |
---|
| 2397 | /// SGraph sgraph(graph); |
---|
| 2398 | /// |
---|
| 2399 | /// typedef ConstMap<SGraph::Edge, int> SCapacity; |
---|
| 2400 | /// SCapacity scapacity(1); |
---|
| 2401 | /// |
---|
| 2402 | /// SGraph::EdgeMap<int> sflow(sgraph); |
---|
| 2403 | /// |
---|
| 2404 | /// Preflow<SGraph, int, SCapacity> |
---|
| 2405 | /// spreflow(sgraph, SGraph::outNode(source),SGraph::inNode(target), |
---|
| 2406 | /// scapacity, sflow); |
---|
| 2407 | /// |
---|
| 2408 | /// spreflow.run(); |
---|
| 2409 | /// |
---|
| 2410 | ///\endcode |
---|
| 2411 | /// |
---|
| 2412 | /// The result of the mamixum flow on the original graph |
---|
| 2413 | /// shows the next figure: |
---|
| 2414 | /// |
---|
| 2415 | /// \image html edge_disjoint.png |
---|
| 2416 | /// \image latex edge_disjoint.eps "Edge disjoint paths" width=\textwidth |
---|
| 2417 | /// |
---|
| 2418 | /// And the maximum flow on the adapted graph: |
---|
| 2419 | /// |
---|
| 2420 | /// \image html node_disjoint.png |
---|
| 2421 | /// \image latex node_disjoint.eps "Node disjoint paths" width=\textwidth |
---|
| 2422 | /// |
---|
| 2423 | /// The second solution contains just 3 disjoint paths while the first 4. |
---|
[2084] | 2424 | /// The full code can be found in the \ref disjoint_paths_demo.cc demo file. |
---|
[2079] | 2425 | /// |
---|
| 2426 | /// This graph adaptor is fully conform to the |
---|
[2111] | 2427 | /// \ref concept::Graph "Graph" concept and |
---|
[2079] | 2428 | /// contains some additional member functions and types. The |
---|
| 2429 | /// documentation of some member functions may be found just in the |
---|
| 2430 | /// SplitGraphAdaptorBase class. |
---|
| 2431 | /// |
---|
| 2432 | /// \sa SplitGraphAdaptorBase |
---|
| 2433 | template <typename _Graph> |
---|
| 2434 | class SplitGraphAdaptor : public AlterableSplitGraphAdaptor<_Graph> { |
---|
| 2435 | public: |
---|
| 2436 | typedef AlterableSplitGraphAdaptor<_Graph> Parent; |
---|
| 2437 | |
---|
| 2438 | typedef typename Parent::Node Node; |
---|
| 2439 | typedef typename Parent::Edge Edge; |
---|
| 2440 | |
---|
| 2441 | /// \brief Constructor of the adaptor. |
---|
| 2442 | /// |
---|
| 2443 | /// Constructor of the adaptor. |
---|
| 2444 | SplitGraphAdaptor(_Graph& graph) { |
---|
| 2445 | Parent::setGraph(graph); |
---|
| 2446 | } |
---|
| 2447 | |
---|
| 2448 | /// \brief NodeMap combined from two original NodeMap |
---|
| 2449 | /// |
---|
| 2450 | /// This class adapt two of the original graph NodeMap to |
---|
| 2451 | /// get a node map on the adapted graph. |
---|
| 2452 | template <typename InNodeMap, typename OutNodeMap> |
---|
| 2453 | class CombinedNodeMap { |
---|
| 2454 | public: |
---|
| 2455 | |
---|
| 2456 | typedef Node Key; |
---|
| 2457 | typedef typename InNodeMap::Value Value; |
---|
| 2458 | |
---|
| 2459 | /// \brief Constructor |
---|
| 2460 | /// |
---|
| 2461 | /// Constructor. |
---|
| 2462 | CombinedNodeMap(InNodeMap& _inNodeMap, OutNodeMap& _outNodeMap) |
---|
| 2463 | : inNodeMap(_inNodeMap), outNodeMap(_outNodeMap) {} |
---|
| 2464 | |
---|
| 2465 | /// \brief The subscript operator. |
---|
| 2466 | /// |
---|
| 2467 | /// The subscript operator. |
---|
| 2468 | Value& operator[](const Key& key) { |
---|
| 2469 | if (Parent::inNode(key)) { |
---|
| 2470 | return inNodeMap[key]; |
---|
| 2471 | } else { |
---|
| 2472 | return outNodeMap[key]; |
---|
| 2473 | } |
---|
| 2474 | } |
---|
| 2475 | |
---|
| 2476 | /// \brief The const subscript operator. |
---|
| 2477 | /// |
---|
| 2478 | /// The const subscript operator. |
---|
| 2479 | Value operator[](const Key& key) const { |
---|
| 2480 | if (Parent::inNode(key)) { |
---|
| 2481 | return inNodeMap[key]; |
---|
| 2482 | } else { |
---|
| 2483 | return outNodeMap[key]; |
---|
| 2484 | } |
---|
| 2485 | } |
---|
| 2486 | |
---|
| 2487 | /// \brief The setter function of the map. |
---|
| 2488 | /// |
---|
| 2489 | /// The setter function of the map. |
---|
| 2490 | void set(const Key& key, const Value& value) { |
---|
| 2491 | if (Parent::inNode(key)) { |
---|
| 2492 | inNodeMap.set(key, value); |
---|
| 2493 | } else { |
---|
| 2494 | outNodeMap.set(key, value); |
---|
| 2495 | } |
---|
| 2496 | } |
---|
| 2497 | |
---|
| 2498 | private: |
---|
| 2499 | |
---|
| 2500 | InNodeMap& inNodeMap; |
---|
| 2501 | OutNodeMap& outNodeMap; |
---|
| 2502 | |
---|
| 2503 | }; |
---|
| 2504 | |
---|
| 2505 | |
---|
| 2506 | /// \brief Just gives back a combined node map. |
---|
| 2507 | /// |
---|
| 2508 | /// Just gives back a combined node map. |
---|
| 2509 | template <typename InNodeMap, typename OutNodeMap> |
---|
| 2510 | static CombinedNodeMap<InNodeMap, OutNodeMap> |
---|
| 2511 | combinedNodeMap(InNodeMap& in_map, OutNodeMap& out_map) { |
---|
| 2512 | return CombinedNodeMap<InNodeMap, OutNodeMap>(in_map, out_map); |
---|
| 2513 | } |
---|
| 2514 | |
---|
| 2515 | template <typename InNodeMap, typename OutNodeMap> |
---|
| 2516 | static CombinedNodeMap<const InNodeMap, OutNodeMap> |
---|
| 2517 | combinedNodeMap(const InNodeMap& in_map, OutNodeMap& out_map) { |
---|
| 2518 | return CombinedNodeMap<const InNodeMap, OutNodeMap>(in_map, out_map); |
---|
| 2519 | } |
---|
| 2520 | |
---|
| 2521 | template <typename InNodeMap, typename OutNodeMap> |
---|
| 2522 | static CombinedNodeMap<InNodeMap, const OutNodeMap> |
---|
| 2523 | combinedNodeMap(InNodeMap& in_map, const OutNodeMap& out_map) { |
---|
| 2524 | return CombinedNodeMap<InNodeMap, const OutNodeMap>(in_map, out_map); |
---|
| 2525 | } |
---|
| 2526 | |
---|
| 2527 | template <typename InNodeMap, typename OutNodeMap> |
---|
| 2528 | static CombinedNodeMap<const InNodeMap, const OutNodeMap> |
---|
| 2529 | combinedNodeMap(const InNodeMap& in_map, const OutNodeMap& out_map) { |
---|
| 2530 | return CombinedNodeMap<const InNodeMap, |
---|
| 2531 | const OutNodeMap>(in_map, out_map); |
---|
| 2532 | } |
---|
| 2533 | |
---|
| 2534 | /// \brief EdgeMap combined from an original EdgeMap and NodeMap |
---|
| 2535 | /// |
---|
| 2536 | /// This class adapt an original graph EdgeMap and NodeMap to |
---|
| 2537 | /// get an edge map on the adapted graph. |
---|
| 2538 | template <typename GraphEdgeMap, typename GraphNodeMap> |
---|
| 2539 | class CombinedEdgeMap |
---|
| 2540 | : public MapBase<Edge, typename GraphEdgeMap::Value> { |
---|
| 2541 | public: |
---|
| 2542 | typedef MapBase<Edge, typename GraphEdgeMap::Value> Parent; |
---|
| 2543 | |
---|
| 2544 | typedef typename Parent::Key Key; |
---|
| 2545 | typedef typename Parent::Value Value; |
---|
| 2546 | |
---|
| 2547 | /// \brief Constructor |
---|
| 2548 | /// |
---|
| 2549 | /// Constructor. |
---|
| 2550 | CombinedEdgeMap(GraphEdgeMap& _edge_map, GraphNodeMap& _node_map) |
---|
| 2551 | : edge_map(_edge_map), node_map(_node_map) {} |
---|
| 2552 | |
---|
| 2553 | /// \brief The subscript operator. |
---|
| 2554 | /// |
---|
| 2555 | /// The subscript operator. |
---|
| 2556 | void set(const Edge& edge, const Value& val) { |
---|
| 2557 | if (Parent::origEdge(edge)) { |
---|
| 2558 | edge_map.set(edge, val); |
---|
| 2559 | } else { |
---|
| 2560 | node_map.set(edge, val); |
---|
| 2561 | } |
---|
| 2562 | } |
---|
| 2563 | |
---|
| 2564 | /// \brief The const subscript operator. |
---|
| 2565 | /// |
---|
| 2566 | /// The const subscript operator. |
---|
| 2567 | Value operator[](const Key& edge) const { |
---|
| 2568 | if (Parent::origEdge(edge)) { |
---|
| 2569 | return edge_map[edge]; |
---|
| 2570 | } else { |
---|
| 2571 | return node_map[edge]; |
---|
| 2572 | } |
---|
| 2573 | } |
---|
| 2574 | |
---|
| 2575 | /// \brief The const subscript operator. |
---|
| 2576 | /// |
---|
| 2577 | /// The const subscript operator. |
---|
| 2578 | Value& operator[](const Key& edge) { |
---|
| 2579 | if (Parent::origEdge(edge)) { |
---|
| 2580 | return edge_map[edge]; |
---|
| 2581 | } else { |
---|
| 2582 | return node_map[edge]; |
---|
| 2583 | } |
---|
| 2584 | } |
---|
| 2585 | |
---|
| 2586 | private: |
---|
| 2587 | GraphEdgeMap& edge_map; |
---|
| 2588 | GraphNodeMap& node_map; |
---|
| 2589 | }; |
---|
| 2590 | |
---|
| 2591 | /// \brief Just gives back a combined edge map. |
---|
| 2592 | /// |
---|
| 2593 | /// Just gives back a combined edge map. |
---|
| 2594 | template <typename GraphEdgeMap, typename GraphNodeMap> |
---|
| 2595 | static CombinedEdgeMap<GraphEdgeMap, GraphNodeMap> |
---|
| 2596 | combinedEdgeMap(GraphEdgeMap& edge_map, GraphNodeMap& node_map) { |
---|
| 2597 | return CombinedEdgeMap<GraphEdgeMap, GraphNodeMap>(edge_map, node_map); |
---|
| 2598 | } |
---|
| 2599 | |
---|
| 2600 | template <typename GraphEdgeMap, typename GraphNodeMap> |
---|
| 2601 | static CombinedEdgeMap<const GraphEdgeMap, GraphNodeMap> |
---|
| 2602 | combinedEdgeMap(const GraphEdgeMap& edge_map, GraphNodeMap& node_map) { |
---|
| 2603 | return CombinedEdgeMap<const GraphEdgeMap, |
---|
| 2604 | GraphNodeMap>(edge_map, node_map); |
---|
| 2605 | } |
---|
| 2606 | |
---|
| 2607 | template <typename GraphEdgeMap, typename GraphNodeMap> |
---|
| 2608 | static CombinedEdgeMap<GraphEdgeMap, const GraphNodeMap> |
---|
| 2609 | combinedEdgeMap(GraphEdgeMap& edge_map, const GraphNodeMap& node_map) { |
---|
| 2610 | return CombinedEdgeMap<GraphEdgeMap, |
---|
| 2611 | const GraphNodeMap>(edge_map, node_map); |
---|
| 2612 | } |
---|
| 2613 | |
---|
| 2614 | template <typename GraphEdgeMap, typename GraphNodeMap> |
---|
| 2615 | static CombinedEdgeMap<const GraphEdgeMap, const GraphNodeMap> |
---|
| 2616 | combinedEdgeMap(const GraphEdgeMap& edge_map, |
---|
| 2617 | const GraphNodeMap& node_map) { |
---|
| 2618 | return CombinedEdgeMap<const GraphEdgeMap, |
---|
| 2619 | const GraphNodeMap>(edge_map, node_map); |
---|
| 2620 | } |
---|
| 2621 | |
---|
| 2622 | }; |
---|
| 2623 | |
---|
[2084] | 2624 | /// \brief Just gives back a split graph adaptor |
---|
| 2625 | /// |
---|
| 2626 | /// Just gives back a split graph adaptor |
---|
| 2627 | template<typename Graph> |
---|
| 2628 | SplitGraphAdaptor<Graph> |
---|
| 2629 | splitGraphAdaptor(const Graph& graph) { |
---|
| 2630 | return SplitGraphAdaptor<Graph>(graph); |
---|
| 2631 | } |
---|
| 2632 | |
---|
[1697] | 2633 | |
---|
[921] | 2634 | } //namespace lemon |
---|
[556] | 2635 | |
---|
[1401] | 2636 | #endif //LEMON_GRAPH_ADAPTOR_H |
---|
[556] | 2637 | |
---|