lemon/bits/graph_extender.h
author Alpar Juttner <alpar@cs.elte.hu>
Tue, 29 Jul 2008 15:06:37 +0200
changeset 243 32155c88f59b
parent 209 765619b7cbb2
child 263 be8a861d3bb7
permissions -rw-r--r--
Merge
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/* -*- mode: C++; indent-tabs-mode: nil; -*-
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 *
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 * This file is a part of LEMON, a generic C++ optimization library.
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 *
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 * Copyright (C) 2003-2008
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 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
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 * (Egervary Research Group on Combinatorial Optimization, EGRES).
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 *
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 * Permission to use, modify and distribute this software is granted
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 * provided that this copyright notice appears in all copies. For
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 * precise terms see the accompanying LICENSE file.
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 *
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 * This software is provided "AS IS" with no warranty of any kind,
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 * express or implied, and with no claim as to its suitability for any
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 * purpose.
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 *
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 */
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#ifndef LEMON_BITS_GRAPH_EXTENDER_H
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#define LEMON_BITS_GRAPH_EXTENDER_H
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#include <lemon/core.h>
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#include <lemon/bits/map_extender.h>
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#include <lemon/bits/default_map.h>
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#include <lemon/concept_check.h>
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#include <lemon/concepts/maps.h>
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///\ingroup graphbits
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///\file
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///\brief Extenders for the digraph types
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namespace lemon {
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  /// \ingroup graphbits
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  ///
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  /// \brief Extender for the Digraphs
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  template <typename Base>
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  class DigraphExtender : public Base {
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  public:
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    typedef Base Parent;
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    typedef DigraphExtender Digraph;
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    // Base extensions
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    typedef typename Parent::Node Node;
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    typedef typename Parent::Arc Arc;
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    int maxId(Node) const {
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      return Parent::maxNodeId();
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    }
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    int maxId(Arc) const {
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      return Parent::maxArcId();
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    }
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    Node fromId(int id, Node) const {
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      return Parent::nodeFromId(id);
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    }
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    Arc fromId(int id, Arc) const {
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      return Parent::arcFromId(id);
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    }
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    Node oppositeNode(const Node &node, const Arc &arc) const {
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      if (node == Parent::source(arc))
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        return Parent::target(arc);
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      else if(node == Parent::target(arc))
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        return Parent::source(arc);
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      else
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        return INVALID;
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    }
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    // Alterable extension
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    typedef AlterationNotifier<DigraphExtender, Node> NodeNotifier;
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    typedef AlterationNotifier<DigraphExtender, Arc> ArcNotifier;
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  protected:
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    mutable NodeNotifier node_notifier;
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    mutable ArcNotifier arc_notifier;
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  public:
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    NodeNotifier& notifier(Node) const {
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      return node_notifier;
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    }
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    ArcNotifier& notifier(Arc) const {
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      return arc_notifier;
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    }
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    class NodeIt : public Node {
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      const Digraph* _digraph;
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    public:
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      NodeIt() {}
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      NodeIt(Invalid i) : Node(i) { }
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      explicit NodeIt(const Digraph& digraph) : _digraph(&digraph) {
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        _digraph->first(static_cast<Node&>(*this));
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      }
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      NodeIt(const Digraph& digraph, const Node& node)
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        : Node(node), _digraph(&digraph) {}
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      NodeIt& operator++() {
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        _digraph->next(*this);
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        return *this;
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      }
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    };
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    class ArcIt : public Arc {
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      const Digraph* _digraph;
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    public:
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      ArcIt() { }
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      ArcIt(Invalid i) : Arc(i) { }
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      explicit ArcIt(const Digraph& digraph) : _digraph(&digraph) {
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        _digraph->first(static_cast<Arc&>(*this));
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      }
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      ArcIt(const Digraph& digraph, const Arc& arc) :
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        Arc(arc), _digraph(&digraph) { }
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      ArcIt& operator++() {
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        _digraph->next(*this);
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        return *this;
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      }
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    };
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    class OutArcIt : public Arc {
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      const Digraph* _digraph;
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    public:
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      OutArcIt() { }
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      OutArcIt(Invalid i) : Arc(i) { }
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      OutArcIt(const Digraph& digraph, const Node& node)
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        : _digraph(&digraph) {
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        _digraph->firstOut(*this, node);
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      }
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      OutArcIt(const Digraph& digraph, const Arc& arc)
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        : Arc(arc), _digraph(&digraph) {}
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      OutArcIt& operator++() {
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        _digraph->nextOut(*this);
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        return *this;
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      }
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    };
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    class InArcIt : public Arc {
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      const Digraph* _digraph;
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    public:
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      InArcIt() { }
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      InArcIt(Invalid i) : Arc(i) { }
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      InArcIt(const Digraph& digraph, const Node& node)
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        : _digraph(&digraph) {
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        _digraph->firstIn(*this, node);
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      }
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      InArcIt(const Digraph& digraph, const Arc& arc) :
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        Arc(arc), _digraph(&digraph) {}
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      InArcIt& operator++() {
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        _digraph->nextIn(*this);
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        return *this;
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      }
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    };
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    /// \brief Base node of the iterator
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    ///
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    /// Returns the base node (i.e. the source in this case) of the iterator
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    Node baseNode(const OutArcIt &arc) const {
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      return Parent::source(arc);
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    }
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    /// \brief Running node of the iterator
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    ///
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    /// Returns the running node (i.e. the target in this case) of the
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    /// iterator
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    Node runningNode(const OutArcIt &arc) const {
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      return Parent::target(arc);
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    }
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    /// \brief Base node of the iterator
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    ///
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    /// Returns the base node (i.e. the target in this case) of the iterator
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    Node baseNode(const InArcIt &arc) const {
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      return Parent::target(arc);
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    }
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    /// \brief Running node of the iterator
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    ///
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    /// Returns the running node (i.e. the source in this case) of the
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    /// iterator
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    Node runningNode(const InArcIt &arc) const {
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      return Parent::source(arc);
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    }
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    template <typename _Value>
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    class NodeMap
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      : public MapExtender<DefaultMap<Digraph, Node, _Value> > {
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    public:
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      typedef DigraphExtender Digraph;
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      typedef MapExtender<DefaultMap<Digraph, Node, _Value> > Parent;
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      explicit NodeMap(const Digraph& digraph)
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        : Parent(digraph) {}
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      NodeMap(const Digraph& digraph, const _Value& value)
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        : Parent(digraph, value) {}
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      NodeMap& operator=(const NodeMap& cmap) {
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        return operator=<NodeMap>(cmap);
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      }
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      template <typename CMap>
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      NodeMap& operator=(const CMap& cmap) {
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        Parent::operator=(cmap);
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        return *this;
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      }
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    };
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    template <typename _Value>
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    class ArcMap
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      : public MapExtender<DefaultMap<Digraph, Arc, _Value> > {
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    public:
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      typedef DigraphExtender Digraph;
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      typedef MapExtender<DefaultMap<Digraph, Arc, _Value> > Parent;
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      explicit ArcMap(const Digraph& digraph)
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        : Parent(digraph) {}
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      ArcMap(const Digraph& digraph, const _Value& value)
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        : Parent(digraph, value) {}
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      ArcMap& operator=(const ArcMap& cmap) {
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        return operator=<ArcMap>(cmap);
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      }
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      template <typename CMap>
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      ArcMap& operator=(const CMap& cmap) {
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        Parent::operator=(cmap);
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        return *this;
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      }
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    };
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    Node addNode() {
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      Node node = Parent::addNode();
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      notifier(Node()).add(node);
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      return node;
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    }
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    Arc addArc(const Node& from, const Node& to) {
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      Arc arc = Parent::addArc(from, to);
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      notifier(Arc()).add(arc);
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      return arc;
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    }
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    void clear() {
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      notifier(Arc()).clear();
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      notifier(Node()).clear();
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      Parent::clear();
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    }
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    template <typename Digraph, typename NodeRefMap, typename ArcRefMap>
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    void build(const Digraph& digraph, NodeRefMap& nodeRef, ArcRefMap& arcRef) {
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      Parent::build(digraph, nodeRef, arcRef);
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      notifier(Node()).build();
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      notifier(Arc()).build();
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    }
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    void erase(const Node& node) {
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      Arc arc;
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      Parent::firstOut(arc, node);
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      while (arc != INVALID ) {
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        erase(arc);
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        Parent::firstOut(arc, node);
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      }
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      Parent::firstIn(arc, node);
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      while (arc != INVALID ) {
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        erase(arc);
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        Parent::firstIn(arc, node);
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      }
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      notifier(Node()).erase(node);
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      Parent::erase(node);
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    }
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    void erase(const Arc& arc) {
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      notifier(Arc()).erase(arc);
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      Parent::erase(arc);
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    }
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    DigraphExtender() {
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      node_notifier.setContainer(*this);
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      arc_notifier.setContainer(*this);
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    }
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    ~DigraphExtender() {
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      arc_notifier.clear();
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      node_notifier.clear();
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    }
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  };
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  /// \ingroup _graphbits
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  ///
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  /// \brief Extender for the Graphs
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  template <typename Base>
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  class GraphExtender : public Base {
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  public:
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    typedef Base Parent;
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    typedef GraphExtender Graph;
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    typedef True UndirectedTag;
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    typedef typename Parent::Node Node;
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    typedef typename Parent::Arc Arc;
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    typedef typename Parent::Edge Edge;
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    // Graph extension
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    int maxId(Node) const {
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      return Parent::maxNodeId();
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    }
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    int maxId(Arc) const {
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      return Parent::maxArcId();
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    }
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    int maxId(Edge) const {
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      return Parent::maxEdgeId();
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    }
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    Node fromId(int id, Node) const {
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      return Parent::nodeFromId(id);
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    }
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    Arc fromId(int id, Arc) const {
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      return Parent::arcFromId(id);
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    }
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    Edge fromId(int id, Edge) const {
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      return Parent::edgeFromId(id);
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    }
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    Node oppositeNode(const Node &n, const Edge &e) const {
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      if( n == Parent::u(e))
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        return Parent::v(e);
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      else if( n == Parent::v(e))
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        return Parent::u(e);
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      else
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        return INVALID;
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    }
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    Arc oppositeArc(const Arc &arc) const {
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      return Parent::direct(arc, !Parent::direction(arc));
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    }
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    using Parent::direct;
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    Arc direct(const Edge &edge, const Node &node) const {
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      return Parent::direct(edge, Parent::u(edge) == node);
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    }
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    // Alterable extension
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    typedef AlterationNotifier<GraphExtender, Node> NodeNotifier;
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    typedef AlterationNotifier<GraphExtender, Arc> ArcNotifier;
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    typedef AlterationNotifier<GraphExtender, Edge> EdgeNotifier;
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  protected:
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    mutable NodeNotifier node_notifier;
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    mutable ArcNotifier arc_notifier;
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    mutable EdgeNotifier edge_notifier;
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  public:
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    NodeNotifier& notifier(Node) const {
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      return node_notifier;
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    }
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    ArcNotifier& notifier(Arc) const {
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      return arc_notifier;
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    }
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    EdgeNotifier& notifier(Edge) const {
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      return edge_notifier;
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    }
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    class NodeIt : public Node {
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      const Graph* _graph;
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    public:
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      NodeIt() {}
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      NodeIt(Invalid i) : Node(i) { }
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      explicit NodeIt(const Graph& graph) : _graph(&graph) {
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        _graph->first(static_cast<Node&>(*this));
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      }
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      NodeIt(const Graph& graph, const Node& node)
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        : Node(node), _graph(&graph) {}
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      NodeIt& operator++() {
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        _graph->next(*this);
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        return *this;
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      }
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    };
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    class ArcIt : public Arc {
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      const Graph* _graph;
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    public:
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      ArcIt() { }
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      ArcIt(Invalid i) : Arc(i) { }
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      explicit ArcIt(const Graph& graph) : _graph(&graph) {
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        _graph->first(static_cast<Arc&>(*this));
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      }
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      ArcIt(const Graph& graph, const Arc& arc) :
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        Arc(arc), _graph(&graph) { }
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      ArcIt& operator++() {
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   454
        _graph->next(*this);
alpar@209
   455
        return *this;
deba@57
   456
      }
deba@57
   457
deba@57
   458
    };
deba@57
   459
deba@57
   460
alpar@209
   461
    class OutArcIt : public Arc {
deba@78
   462
      const Graph* _graph;
deba@57
   463
    public:
deba@57
   464
deba@57
   465
      OutArcIt() { }
deba@57
   466
deba@57
   467
      OutArcIt(Invalid i) : Arc(i) { }
deba@57
   468
alpar@209
   469
      OutArcIt(const Graph& graph, const Node& node)
alpar@209
   470
        : _graph(&graph) {
alpar@209
   471
        _graph->firstOut(*this, node);
deba@57
   472
      }
deba@57
   473
alpar@209
   474
      OutArcIt(const Graph& graph, const Arc& arc)
alpar@209
   475
        : Arc(arc), _graph(&graph) {}
deba@57
   476
alpar@209
   477
      OutArcIt& operator++() {
alpar@209
   478
        _graph->nextOut(*this);
alpar@209
   479
        return *this;
deba@57
   480
      }
deba@57
   481
deba@57
   482
    };
deba@57
   483
deba@57
   484
alpar@209
   485
    class InArcIt : public Arc {
deba@78
   486
      const Graph* _graph;
deba@57
   487
    public:
deba@57
   488
deba@57
   489
      InArcIt() { }
deba@57
   490
deba@57
   491
      InArcIt(Invalid i) : Arc(i) { }
deba@57
   492
alpar@209
   493
      InArcIt(const Graph& graph, const Node& node)
alpar@209
   494
        : _graph(&graph) {
alpar@209
   495
        _graph->firstIn(*this, node);
deba@57
   496
      }
deba@57
   497
alpar@209
   498
      InArcIt(const Graph& graph, const Arc& arc) :
alpar@209
   499
        Arc(arc), _graph(&graph) {}
deba@57
   500
alpar@209
   501
      InArcIt& operator++() {
alpar@209
   502
        _graph->nextIn(*this);
alpar@209
   503
        return *this;
deba@57
   504
      }
deba@57
   505
deba@57
   506
    };
deba@57
   507
deba@57
   508
alpar@209
   509
    class EdgeIt : public Parent::Edge {
deba@78
   510
      const Graph* _graph;
deba@57
   511
    public:
deba@57
   512
deba@57
   513
      EdgeIt() { }
deba@57
   514
deba@57
   515
      EdgeIt(Invalid i) : Edge(i) { }
deba@57
   516
deba@78
   517
      explicit EdgeIt(const Graph& graph) : _graph(&graph) {
alpar@209
   518
        _graph->first(static_cast<Edge&>(*this));
deba@57
   519
      }
deba@57
   520
alpar@209
   521
      EdgeIt(const Graph& graph, const Edge& edge) :
alpar@209
   522
        Edge(edge), _graph(&graph) { }
deba@57
   523
alpar@209
   524
      EdgeIt& operator++() {
alpar@209
   525
        _graph->next(*this);
alpar@209
   526
        return *this;
deba@57
   527
      }
deba@57
   528
deba@57
   529
    };
deba@57
   530
deba@78
   531
    class IncEdgeIt : public Parent::Edge {
deba@57
   532
      friend class GraphExtender;
deba@78
   533
      const Graph* _graph;
deba@78
   534
      bool _direction;
deba@57
   535
    public:
deba@57
   536
deba@78
   537
      IncEdgeIt() { }
deba@57
   538
deba@78
   539
      IncEdgeIt(Invalid i) : Edge(i), _direction(false) { }
deba@57
   540
deba@78
   541
      IncEdgeIt(const Graph& graph, const Node &node) : _graph(&graph) {
alpar@209
   542
        _graph->firstInc(*this, _direction, node);
deba@57
   543
      }
deba@57
   544
deba@78
   545
      IncEdgeIt(const Graph& graph, const Edge &edge, const Node &node)
alpar@209
   546
        : _graph(&graph), Edge(edge) {
alpar@209
   547
        _direction = (_graph->source(edge) == node);
deba@57
   548
      }
deba@57
   549
deba@78
   550
      IncEdgeIt& operator++() {
alpar@209
   551
        _graph->nextInc(*this, _direction);
alpar@209
   552
        return *this;
deba@57
   553
      }
deba@57
   554
    };
deba@57
   555
deba@57
   556
    /// \brief Base node of the iterator
deba@57
   557
    ///
deba@57
   558
    /// Returns the base node (ie. the source in this case) of the iterator
deba@78
   559
    Node baseNode(const OutArcIt &arc) const {
deba@78
   560
      return Parent::source(static_cast<const Arc&>(arc));
deba@57
   561
    }
deba@57
   562
    /// \brief Running node of the iterator
deba@57
   563
    ///
deba@57
   564
    /// Returns the running node (ie. the target in this case) of the
deba@57
   565
    /// iterator
deba@78
   566
    Node runningNode(const OutArcIt &arc) const {
deba@78
   567
      return Parent::target(static_cast<const Arc&>(arc));
deba@57
   568
    }
deba@57
   569
deba@57
   570
    /// \brief Base node of the iterator
deba@57
   571
    ///
deba@57
   572
    /// Returns the base node (ie. the target in this case) of the iterator
deba@78
   573
    Node baseNode(const InArcIt &arc) const {
deba@78
   574
      return Parent::target(static_cast<const Arc&>(arc));
deba@57
   575
    }
deba@57
   576
    /// \brief Running node of the iterator
deba@57
   577
    ///
deba@57
   578
    /// Returns the running node (ie. the source in this case) of the
deba@57
   579
    /// iterator
deba@78
   580
    Node runningNode(const InArcIt &arc) const {
deba@78
   581
      return Parent::source(static_cast<const Arc&>(arc));
deba@57
   582
    }
deba@57
   583
deba@57
   584
    /// Base node of the iterator
deba@57
   585
    ///
deba@57
   586
    /// Returns the base node of the iterator
deba@78
   587
    Node baseNode(const IncEdgeIt &edge) const {
deba@125
   588
      return edge._direction ? u(edge) : v(edge);
deba@57
   589
    }
deba@57
   590
    /// Running node of the iterator
deba@57
   591
    ///
deba@57
   592
    /// Returns the running node of the iterator
deba@78
   593
    Node runningNode(const IncEdgeIt &edge) const {
deba@125
   594
      return edge._direction ? v(edge) : u(edge);
deba@57
   595
    }
deba@57
   596
deba@57
   597
    // Mappable extension
deba@57
   598
deba@57
   599
    template <typename _Value>
alpar@209
   600
    class NodeMap
deba@78
   601
      : public MapExtender<DefaultMap<Graph, Node, _Value> > {
deba@57
   602
    public:
deba@78
   603
      typedef GraphExtender Graph;
deba@78
   604
      typedef MapExtender<DefaultMap<Graph, Node, _Value> > Parent;
deba@57
   605
alpar@209
   606
      NodeMap(const Graph& graph)
alpar@209
   607
        : Parent(graph) {}
alpar@209
   608
      NodeMap(const Graph& graph, const _Value& value)
alpar@209
   609
        : Parent(graph, value) {}
deba@57
   610
deba@57
   611
      NodeMap& operator=(const NodeMap& cmap) {
alpar@209
   612
        return operator=<NodeMap>(cmap);
deba@57
   613
      }
deba@57
   614
deba@57
   615
      template <typename CMap>
deba@57
   616
      NodeMap& operator=(const CMap& cmap) {
deba@57
   617
        Parent::operator=(cmap);
alpar@209
   618
        return *this;
deba@57
   619
      }
deba@57
   620
deba@57
   621
    };
deba@57
   622
deba@57
   623
    template <typename _Value>
alpar@209
   624
    class ArcMap
deba@78
   625
      : public MapExtender<DefaultMap<Graph, Arc, _Value> > {
deba@57
   626
    public:
deba@78
   627
      typedef GraphExtender Graph;
deba@78
   628
      typedef MapExtender<DefaultMap<Graph, Arc, _Value> > Parent;
deba@57
   629
alpar@209
   630
      ArcMap(const Graph& graph)
alpar@209
   631
        : Parent(graph) {}
alpar@209
   632
      ArcMap(const Graph& graph, const _Value& value)
alpar@209
   633
        : Parent(graph, value) {}
deba@57
   634
deba@57
   635
      ArcMap& operator=(const ArcMap& cmap) {
alpar@209
   636
        return operator=<ArcMap>(cmap);
deba@57
   637
      }
deba@57
   638
deba@57
   639
      template <typename CMap>
deba@57
   640
      ArcMap& operator=(const CMap& cmap) {
deba@57
   641
        Parent::operator=(cmap);
alpar@209
   642
        return *this;
deba@57
   643
      }
deba@57
   644
    };
deba@57
   645
deba@57
   646
deba@57
   647
    template <typename _Value>
alpar@209
   648
    class EdgeMap
deba@78
   649
      : public MapExtender<DefaultMap<Graph, Edge, _Value> > {
deba@57
   650
    public:
deba@78
   651
      typedef GraphExtender Graph;
deba@78
   652
      typedef MapExtender<DefaultMap<Graph, Edge, _Value> > Parent;
deba@57
   653
alpar@209
   654
      EdgeMap(const Graph& graph)
alpar@209
   655
        : Parent(graph) {}
deba@57
   656
alpar@209
   657
      EdgeMap(const Graph& graph, const _Value& value)
alpar@209
   658
        : Parent(graph, value) {}
deba@57
   659
deba@57
   660
      EdgeMap& operator=(const EdgeMap& cmap) {
alpar@209
   661
        return operator=<EdgeMap>(cmap);
deba@57
   662
      }
deba@57
   663
deba@57
   664
      template <typename CMap>
deba@57
   665
      EdgeMap& operator=(const CMap& cmap) {
deba@57
   666
        Parent::operator=(cmap);
alpar@209
   667
        return *this;
deba@57
   668
      }
deba@57
   669
deba@57
   670
    };
deba@57
   671
deba@57
   672
    // Alteration extension
deba@57
   673
deba@57
   674
    Node addNode() {
deba@57
   675
      Node node = Parent::addNode();
deba@57
   676
      notifier(Node()).add(node);
deba@57
   677
      return node;
deba@57
   678
    }
deba@57
   679
deba@57
   680
    Edge addEdge(const Node& from, const Node& to) {
deba@57
   681
      Edge edge = Parent::addEdge(from, to);
deba@57
   682
      notifier(Edge()).add(edge);
deba@57
   683
      std::vector<Arc> ev;
deba@57
   684
      ev.push_back(Parent::direct(edge, true));
alpar@209
   685
      ev.push_back(Parent::direct(edge, false));
deba@57
   686
      notifier(Arc()).add(ev);
deba@57
   687
      return edge;
deba@57
   688
    }
alpar@209
   689
deba@57
   690
    void clear() {
deba@57
   691
      notifier(Arc()).clear();
deba@57
   692
      notifier(Edge()).clear();
deba@57
   693
      notifier(Node()).clear();
deba@57
   694
      Parent::clear();
deba@57
   695
    }
deba@57
   696
deba@78
   697
    template <typename Graph, typename NodeRefMap, typename EdgeRefMap>
alpar@209
   698
    void build(const Graph& graph, NodeRefMap& nodeRef,
deba@57
   699
               EdgeRefMap& edgeRef) {
deba@78
   700
      Parent::build(graph, nodeRef, edgeRef);
deba@57
   701
      notifier(Node()).build();
deba@57
   702
      notifier(Edge()).build();
deba@57
   703
      notifier(Arc()).build();
deba@57
   704
    }
deba@57
   705
deba@57
   706
    void erase(const Node& node) {
deba@57
   707
      Arc arc;
deba@57
   708
      Parent::firstOut(arc, node);
deba@57
   709
      while (arc != INVALID ) {
alpar@209
   710
        erase(arc);
alpar@209
   711
        Parent::firstOut(arc, node);
alpar@209
   712
      }
deba@57
   713
deba@57
   714
      Parent::firstIn(arc, node);
deba@57
   715
      while (arc != INVALID ) {
alpar@209
   716
        erase(arc);
alpar@209
   717
        Parent::firstIn(arc, node);
deba@57
   718
      }
deba@57
   719
deba@57
   720
      notifier(Node()).erase(node);
deba@57
   721
      Parent::erase(node);
deba@57
   722
    }
deba@57
   723
deba@57
   724
    void erase(const Edge& edge) {
deba@78
   725
      std::vector<Arc> av;
deba@78
   726
      av.push_back(Parent::direct(edge, true));
alpar@209
   727
      av.push_back(Parent::direct(edge, false));
deba@78
   728
      notifier(Arc()).erase(av);
deba@57
   729
      notifier(Edge()).erase(edge);
deba@57
   730
      Parent::erase(edge);
deba@57
   731
    }
deba@57
   732
deba@57
   733
    GraphExtender() {
alpar@209
   734
      node_notifier.setContainer(*this);
deba@57
   735
      arc_notifier.setContainer(*this);
deba@57
   736
      edge_notifier.setContainer(*this);
alpar@209
   737
    }
deba@57
   738
deba@57
   739
    ~GraphExtender() {
deba@57
   740
      edge_notifier.clear();
deba@57
   741
      arc_notifier.clear();
alpar@209
   742
      node_notifier.clear();
alpar@209
   743
    }
deba@57
   744
deba@57
   745
  };
deba@57
   746
deba@57
   747
}
deba@57
   748
deba@57
   749
#endif