lemon/lgf_writer.h
author Alpar Juttner <alpar@cs.elte.hu>
Mon, 14 Jul 2008 10:55:43 +0100
changeset 215 17c644f5f98d
parent 209 765619b7cbb2
child 220 a5d8c039f218
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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///\ingroup lemon_io
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///\file
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///\brief \ref lgf-format "Lemon Graph Format" writer.
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#ifndef LEMON_LGF_WRITER_H
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#define LEMON_LGF_WRITER_H
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#include <iostream>
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#include <fstream>
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#include <sstream>
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#include <algorithm>
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#include <vector>
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#include <functional>
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#include <lemon/assert.h>
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#include <lemon/graph_utils.h>
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namespace lemon {
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  namespace _writer_bits {
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    template <typename Value>
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    struct DefaultConverter {
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      std::string operator()(const Value& value) {
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        std::ostringstream os;
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        os << value;
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        return os.str();
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      }
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    };
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    template <typename T>
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    bool operator<(const T&, const T&) {
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      throw DataFormatError("Label map is not comparable");
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    }
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    template <typename _Map>
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    class MapLess {
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    public:
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      typedef _Map Map;
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      typedef typename Map::Key Item;
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    private:
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      const Map& _map;
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    public:
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      MapLess(const Map& map) : _map(map) {}
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      bool operator()(const Item& left, const Item& right) {
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        return _map[left] < _map[right];
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      }
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    };
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    template <typename _Graph, bool _dir, typename _Map>
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    class GraphArcMapLess {
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    public:
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      typedef _Map Map;
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      typedef _Graph Graph;
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      typedef typename Graph::Edge Item;
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    private:
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      const Graph& _graph;
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      const Map& _map;
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    public:
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      GraphArcMapLess(const Graph& graph, const Map& map)
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        : _graph(graph), _map(map) {}
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      bool operator()(const Item& left, const Item& right) {
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        return _map[_graph.direct(left, _dir)] <
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          _map[_graph.direct(right, _dir)];
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      }
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    };
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    template <typename _Item>
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    class MapStorageBase {
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    public:
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      typedef _Item Item;
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    public:
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      MapStorageBase() {}
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      virtual ~MapStorageBase() {}
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      virtual std::string get(const Item& item) = 0;
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      virtual void sort(std::vector<Item>&) = 0;
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    };
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    template <typename _Item, typename _Map,
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              typename _Converter = DefaultConverter<typename _Map::Value> >
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    class MapStorage : public MapStorageBase<_Item> {
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    public:
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      typedef _Map Map;
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      typedef _Converter Converter;
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      typedef _Item Item;
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    private:
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      const Map& _map;
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      Converter _converter;
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    public:
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      MapStorage(const Map& map, const Converter& converter = Converter())
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        : _map(map), _converter(converter) {}
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      virtual ~MapStorage() {}
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      virtual std::string get(const Item& item) {
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        return _converter(_map[item]);
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      }
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      virtual void sort(std::vector<Item>& items) {
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        MapLess<Map> less(_map);
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        std::sort(items.begin(), items.end(), less);
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      }
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    };
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    template <typename _Graph, bool _dir, typename _Map,
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              typename _Converter = DefaultConverter<typename _Map::Value> >
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    class GraphArcMapStorage : public MapStorageBase<typename _Graph::Edge> {
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    public:
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      typedef _Map Map;
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      typedef _Converter Converter;
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      typedef _Graph Graph;
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      typedef typename Graph::Edge Item;
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      static const bool dir = _dir;
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    private:
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      const Graph& _graph;
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      const Map& _map;
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      Converter _converter;
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    public:
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      GraphArcMapStorage(const Graph& graph, const Map& map,
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                         const Converter& converter = Converter())
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        : _graph(graph), _map(map), _converter(converter) {}
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      virtual ~GraphArcMapStorage() {}
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      virtual std::string get(const Item& item) {
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        return _converter(_map[_graph.direct(item, dir)]);
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      }
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      virtual void sort(std::vector<Item>& items) {
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        GraphArcMapLess<Graph, dir, Map> less(_graph, _map);
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        std::sort(items.begin(), items.end(), less);
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      }
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    };
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    class ValueStorageBase {
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    public:
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      ValueStorageBase() {}
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      virtual ~ValueStorageBase() {}
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      virtual std::string get() = 0;
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    };
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    template <typename _Value, typename _Converter = DefaultConverter<_Value> >
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    class ValueStorage : public ValueStorageBase {
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    public:
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      typedef _Value Value;
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      typedef _Converter Converter;
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    private:
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      const Value& _value;
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      Converter _converter;
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    public:
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      ValueStorage(const Value& value, const Converter& converter = Converter())
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        : _value(value), _converter(converter) {}
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      virtual std::string get() {
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        return _converter(_value);
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      }
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    };
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    template <typename Value>
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    struct MapLookUpConverter {
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      const std::map<Value, std::string>& _map;
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      MapLookUpConverter(const std::map<Value, std::string>& map)
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        : _map(map) {}
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      std::string operator()(const Value& str) {
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        typename std::map<Value, std::string>::const_iterator it =
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          _map.find(str);
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        if (it == _map.end()) {
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          throw DataFormatError("Item not found");
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        }
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        return it->second;
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      }
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    };
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    template <typename Graph>
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    struct GraphArcLookUpConverter {
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      const Graph& _graph;
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      const std::map<typename Graph::Edge, std::string>& _map;
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      GraphArcLookUpConverter(const Graph& graph,
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                              const std::map<typename Graph::Edge,
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                                             std::string>& map)
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        : _graph(graph), _map(map) {}
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      std::string operator()(const typename Graph::Arc& val) {
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        typename std::map<typename Graph::Edge, std::string>
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          ::const_iterator it = _map.find(val);
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        if (it == _map.end()) {
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          throw DataFormatError("Item not found");
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        }
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        return (_graph.direction(val) ? '+' : '-') + it->second;
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      }
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    };
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    inline bool isWhiteSpace(char c) {
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      return c == ' ' || c == '\t' || c == '\v' ||
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        c == '\n' || c == '\r' || c == '\f';
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    }
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    inline bool isEscaped(char c) {
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      return c == '\\' || c == '\"' || c == '\'' ||
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        c == '\a' || c == '\b';
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    }
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    inline static void writeEscape(std::ostream& os, char c) {
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      switch (c) {
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      case '\\':
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        os << "\\\\";
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        return;
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      case '\"':
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        os << "\\\"";
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        return;
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      case '\a':
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        os << "\\a";
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        return;
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      case '\b':
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        os << "\\b";
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        return;
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      case '\f':
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        os << "\\f";
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        return;
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      case '\r':
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        os << "\\r";
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        return;
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      case '\n':
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        os << "\\n";
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        return;
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      case '\t':
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        os << "\\t";
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        return;
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      case '\v':
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        os << "\\v";
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        return;
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      default:
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        if (c < 0x20) {
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          std::ios::fmtflags flags = os.flags();
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          os << '\\' << std::oct << static_cast<int>(c);
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          os.flags(flags);
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        } else {
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          os << c;
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        }
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        return;
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      }
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    }
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    inline bool requireEscape(const std::string& str) {
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      if (str.empty() || str[0] == '@') return true;
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      std::istringstream is(str);
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      char c;
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      while (is.get(c)) {
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        if (isWhiteSpace(c) || isEscaped(c)) {
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          return true;
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        }
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      }
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      return false;
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    }
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    inline std::ostream& writeToken(std::ostream& os, const std::string& str) {
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      if (requireEscape(str)) {
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        os << '\"';
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        for (std::string::const_iterator it = str.begin();
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             it != str.end(); ++it) {
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          writeEscape(os, *it);
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        }
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        os << '\"';
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      } else {
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        os << str;
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      }
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      return os;
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    }
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  }
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  template <typename Digraph>
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  class DigraphWriter;
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  template <typename Digraph>
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  DigraphWriter<Digraph> digraphWriter(std::ostream& os,
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                                       const Digraph& digraph);
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  template <typename Digraph>
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  DigraphWriter<Digraph> digraphWriter(const std::string& fn,
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                                       const Digraph& digraph);
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  template <typename Digraph>
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  DigraphWriter<Digraph> digraphWriter(const char *fn,
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                                       const Digraph& digraph);
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  /// \ingroup lemon_io
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  ///
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  /// \brief \ref lgf-format "LGF" writer for directed graphs
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  ///
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  /// This utility writes an \ref lgf-format "LGF" file.
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  ///
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  /// The writing method does a batch processing. The user creates a
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  /// writer object, then various writing rules can be added to the
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  /// writer, and eventually the writing is executed with the \c run()
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  /// member function. A map writing rule can be added to the writer
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  /// with the \c nodeMap() or \c arcMap() members. An optional
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  /// converter parameter can also be added as a standard functor
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  /// converting from the value type of the map to \c std::string. If it
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  /// is set, it will determine how the value type of the map is written to
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  /// the output stream. If the functor is not set, then a default
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  /// conversion will be used. The \c attribute(), \c node() and \c
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  /// arc() functions are used to add attribute writing rules.
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  ///
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  ///\code
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  /// DigraphWriter<Digraph>(std::cout, digraph).
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  ///   nodeMap("coordinates", coord_map).
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  ///   nodeMap("size", size).
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  ///   nodeMap("title", title).
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  ///   arcMap("capacity", cap_map).
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  ///   node("source", src).
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  ///   node("target", trg).
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  ///   attribute("caption", caption).
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  ///   run();
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  ///\endcode
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  ///
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  ///
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  /// By default, the writer does not write additional captions to the
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  /// sections, but they can be give as an optional parameter of
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  /// the \c nodes(), \c arcs() or \c
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  /// attributes() functions.
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  ///
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  /// The \c skipNodes() and \c skipArcs() functions forbid the
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  /// writing of the sections. If two arc sections should be written
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  /// to the output, it can be done in two passes, the first pass
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  /// writes the node section and the first arc section, then the
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  /// second pass skips the node section and writes just the arc
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  /// section to the stream. The output stream can be retrieved with
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  /// the \c ostream() function, hence the second pass can append its
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  /// output to the output of the first pass.
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  template <typename _Digraph>
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  class DigraphWriter {
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  public:
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    typedef _Digraph Digraph;
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    TEMPLATE_DIGRAPH_TYPEDEFS(Digraph);
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  private:
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    std::ostream* _os;
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    bool local_os;
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    const Digraph& _digraph;
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    std::string _nodes_caption;
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    std::string _arcs_caption;
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    std::string _attributes_caption;
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    typedef std::map<Node, std::string> NodeIndex;
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    NodeIndex _node_index;
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    typedef std::map<Arc, std::string> ArcIndex;
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    ArcIndex _arc_index;
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    typedef std::vector<std::pair<std::string,
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      _writer_bits::MapStorageBase<Node>* > > NodeMaps;
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    NodeMaps _node_maps;
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    typedef std::vector<std::pair<std::string,
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      _writer_bits::MapStorageBase<Arc>* > >ArcMaps;
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    ArcMaps _arc_maps;
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    typedef std::vector<std::pair<std::string,
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      _writer_bits::ValueStorageBase*> > Attributes;
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    Attributes _attributes;
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    bool _skip_nodes;
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    bool _skip_arcs;
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  public:
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    /// \brief Constructor
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    ///
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    /// Construct a directed graph writer, which writes to the given
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    /// output stream.
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    DigraphWriter(std::ostream& is, const Digraph& digraph)
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      : _os(&is), local_os(false), _digraph(digraph),
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        _skip_nodes(false), _skip_arcs(false) {}
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    /// \brief Constructor
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    ///
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    /// Construct a directed graph writer, which writes to the given
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    /// output file.
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    DigraphWriter(const std::string& fn, const Digraph& digraph)
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      : _os(new std::ofstream(fn.c_str())), local_os(true), _digraph(digraph),
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        _skip_nodes(false), _skip_arcs(false) {}
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    /// \brief Constructor
alpar@156
   425
    ///
alpar@156
   426
    /// Construct a directed graph writer, which writes to the given
alpar@156
   427
    /// output file.
alpar@209
   428
    DigraphWriter(const char* fn, const Digraph& digraph)
deba@127
   429
      : _os(new std::ofstream(fn)), local_os(true), _digraph(digraph),
alpar@209
   430
        _skip_nodes(false), _skip_arcs(false) {}
deba@127
   431
alpar@156
   432
    /// \brief Destructor
deba@127
   433
    ~DigraphWriter() {
alpar@209
   434
      for (typename NodeMaps::iterator it = _node_maps.begin();
alpar@209
   435
           it != _node_maps.end(); ++it) {
alpar@209
   436
        delete it->second;
deba@127
   437
      }
deba@127
   438
alpar@209
   439
      for (typename ArcMaps::iterator it = _arc_maps.begin();
alpar@209
   440
           it != _arc_maps.end(); ++it) {
alpar@209
   441
        delete it->second;
deba@127
   442
      }
deba@127
   443
alpar@209
   444
      for (typename Attributes::iterator it = _attributes.begin();
alpar@209
   445
           it != _attributes.end(); ++it) {
alpar@209
   446
        delete it->second;
deba@127
   447
      }
deba@127
   448
deba@127
   449
      if (local_os) {
alpar@209
   450
        delete _os;
deba@127
   451
      }
deba@127
   452
    }
deba@127
   453
deba@127
   454
  private:
deba@190
   455
alpar@209
   456
    friend DigraphWriter<Digraph> digraphWriter<>(std::ostream& os,
alpar@209
   457
                                                  const Digraph& digraph);
alpar@209
   458
    friend DigraphWriter<Digraph> digraphWriter<>(const std::string& fn,
alpar@209
   459
                                                  const Digraph& digraph);
alpar@209
   460
    friend DigraphWriter<Digraph> digraphWriter<>(const char *fn,
alpar@209
   461
                                                  const Digraph& digraph);
deba@190
   462
alpar@209
   463
    DigraphWriter(DigraphWriter& other)
deba@190
   464
      : _os(other._os), local_os(other.local_os), _digraph(other._digraph),
alpar@209
   465
        _skip_nodes(other._skip_nodes), _skip_arcs(other._skip_arcs) {
deba@190
   466
deba@190
   467
      other._os = 0;
deba@190
   468
      other.local_os = false;
deba@190
   469
deba@190
   470
      _node_index.swap(other._node_index);
deba@190
   471
      _arc_index.swap(other._arc_index);
deba@190
   472
deba@190
   473
      _node_maps.swap(other._node_maps);
deba@190
   474
      _arc_maps.swap(other._arc_maps);
deba@190
   475
      _attributes.swap(other._attributes);
deba@190
   476
deba@190
   477
      _nodes_caption = other._nodes_caption;
deba@190
   478
      _arcs_caption = other._arcs_caption;
deba@190
   479
      _attributes_caption = other._attributes_caption;
deba@190
   480
    }
alpar@209
   481
deba@127
   482
    DigraphWriter& operator=(const DigraphWriter&);
deba@127
   483
deba@127
   484
  public:
deba@127
   485
alpar@156
   486
    /// \name Writing rules
alpar@156
   487
    /// @{
alpar@209
   488
kpeter@192
   489
    /// \brief Node map writing rule
alpar@156
   490
    ///
kpeter@192
   491
    /// Add a node map writing rule to the writer.
deba@127
   492
    template <typename Map>
deba@127
   493
    DigraphWriter& nodeMap(const std::string& caption, const Map& map) {
deba@127
   494
      checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>();
alpar@209
   495
      _writer_bits::MapStorageBase<Node>* storage =
alpar@209
   496
        new _writer_bits::MapStorage<Node, Map>(map);
deba@127
   497
      _node_maps.push_back(std::make_pair(caption, storage));
deba@127
   498
      return *this;
deba@127
   499
    }
deba@127
   500
alpar@156
   501
    /// \brief Node map writing rule
alpar@156
   502
    ///
alpar@156
   503
    /// Add a node map writing rule with specialized converter to the
alpar@156
   504
    /// writer.
deba@127
   505
    template <typename Map, typename Converter>
alpar@209
   506
    DigraphWriter& nodeMap(const std::string& caption, const Map& map,
alpar@209
   507
                           const Converter& converter = Converter()) {
deba@127
   508
      checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>();
alpar@209
   509
      _writer_bits::MapStorageBase<Node>* storage =
alpar@209
   510
        new _writer_bits::MapStorage<Node, Map, Converter>(map, converter);
deba@127
   511
      _node_maps.push_back(std::make_pair(caption, storage));
deba@127
   512
      return *this;
deba@127
   513
    }
deba@127
   514
alpar@156
   515
    /// \brief Arc map writing rule
alpar@156
   516
    ///
alpar@156
   517
    /// Add an arc map writing rule to the writer.
deba@127
   518
    template <typename Map>
deba@127
   519
    DigraphWriter& arcMap(const std::string& caption, const Map& map) {
deba@127
   520
      checkConcept<concepts::ReadMap<Arc, typename Map::Value>, Map>();
alpar@209
   521
      _writer_bits::MapStorageBase<Arc>* storage =
alpar@209
   522
        new _writer_bits::MapStorage<Arc, Map>(map);
deba@127
   523
      _arc_maps.push_back(std::make_pair(caption, storage));
deba@127
   524
      return *this;
deba@127
   525
    }
deba@127
   526
alpar@156
   527
    /// \brief Arc map writing rule
alpar@156
   528
    ///
alpar@156
   529
    /// Add an arc map writing rule with specialized converter to the
alpar@156
   530
    /// writer.
deba@127
   531
    template <typename Map, typename Converter>
alpar@209
   532
    DigraphWriter& arcMap(const std::string& caption, const Map& map,
alpar@209
   533
                          const Converter& converter = Converter()) {
deba@127
   534
      checkConcept<concepts::ReadMap<Arc, typename Map::Value>, Map>();
alpar@209
   535
      _writer_bits::MapStorageBase<Arc>* storage =
alpar@209
   536
        new _writer_bits::MapStorage<Arc, Map, Converter>(map, converter);
deba@127
   537
      _arc_maps.push_back(std::make_pair(caption, storage));
deba@127
   538
      return *this;
deba@127
   539
    }
deba@127
   540
alpar@156
   541
    /// \brief Attribute writing rule
alpar@156
   542
    ///
alpar@156
   543
    /// Add an attribute writing rule to the writer.
deba@127
   544
    template <typename Value>
deba@127
   545
    DigraphWriter& attribute(const std::string& caption, const Value& value) {
alpar@209
   546
      _writer_bits::ValueStorageBase* storage =
alpar@209
   547
        new _writer_bits::ValueStorage<Value>(value);
deba@127
   548
      _attributes.push_back(std::make_pair(caption, storage));
deba@127
   549
      return *this;
deba@127
   550
    }
deba@127
   551
alpar@156
   552
    /// \brief Attribute writing rule
alpar@156
   553
    ///
alpar@156
   554
    /// Add an attribute writing rule with specialized converter to the
alpar@156
   555
    /// writer.
deba@127
   556
    template <typename Value, typename Converter>
alpar@209
   557
    DigraphWriter& attribute(const std::string& caption, const Value& value,
alpar@209
   558
                             const Converter& converter = Converter()) {
alpar@209
   559
      _writer_bits::ValueStorageBase* storage =
alpar@209
   560
        new _writer_bits::ValueStorage<Value, Converter>(value, converter);
deba@127
   561
      _attributes.push_back(std::make_pair(caption, storage));
deba@127
   562
      return *this;
deba@127
   563
    }
deba@127
   564
alpar@156
   565
    /// \brief Node writing rule
alpar@156
   566
    ///
alpar@156
   567
    /// Add a node writing rule to the writer.
deba@127
   568
    DigraphWriter& node(const std::string& caption, const Node& node) {
deba@127
   569
      typedef _writer_bits::MapLookUpConverter<Node> Converter;
deba@127
   570
      Converter converter(_node_index);
alpar@209
   571
      _writer_bits::ValueStorageBase* storage =
alpar@209
   572
        new _writer_bits::ValueStorage<Node, Converter>(node, converter);
deba@127
   573
      _attributes.push_back(std::make_pair(caption, storage));
deba@127
   574
      return *this;
deba@127
   575
    }
deba@127
   576
alpar@156
   577
    /// \brief Arc writing rule
alpar@156
   578
    ///
alpar@156
   579
    /// Add an arc writing rule to writer.
deba@127
   580
    DigraphWriter& arc(const std::string& caption, const Arc& arc) {
deba@127
   581
      typedef _writer_bits::MapLookUpConverter<Arc> Converter;
deba@127
   582
      Converter converter(_arc_index);
alpar@209
   583
      _writer_bits::ValueStorageBase* storage =
alpar@209
   584
        new _writer_bits::ValueStorage<Arc, Converter>(arc, converter);
deba@127
   585
      _attributes.push_back(std::make_pair(caption, storage));
deba@127
   586
      return *this;
deba@127
   587
    }
deba@127
   588
kpeter@192
   589
    /// \name Section captions
alpar@156
   590
    /// @{
alpar@156
   591
kpeter@192
   592
    /// \brief Add an additional caption to the \c \@nodes section
alpar@156
   593
    ///
kpeter@192
   594
    /// Add an additional caption to the \c \@nodes section.
deba@127
   595
    DigraphWriter& nodes(const std::string& caption) {
deba@127
   596
      _nodes_caption = caption;
deba@127
   597
      return *this;
deba@127
   598
    }
deba@127
   599
kpeter@192
   600
    /// \brief Add an additional caption to the \c \@arcs section
alpar@156
   601
    ///
kpeter@192
   602
    /// Add an additional caption to the \c \@arcs section.
deba@127
   603
    DigraphWriter& arcs(const std::string& caption) {
deba@127
   604
      _arcs_caption = caption;
deba@127
   605
      return *this;
deba@127
   606
    }
deba@127
   607
kpeter@192
   608
    /// \brief Add an additional caption to the \c \@attributes section
alpar@156
   609
    ///
kpeter@192
   610
    /// Add an additional caption to the \c \@attributes section.
deba@127
   611
    DigraphWriter& attributes(const std::string& caption) {
deba@127
   612
      _attributes_caption = caption;
deba@127
   613
      return *this;
deba@127
   614
    }
deba@127
   615
alpar@156
   616
    /// \name Skipping section
alpar@156
   617
    /// @{
alpar@156
   618
alpar@156
   619
    /// \brief Skip writing the node set
alpar@156
   620
    ///
kpeter@192
   621
    /// The \c \@nodes section will not be written to the stream.
deba@127
   622
    DigraphWriter& skipNodes() {
deba@127
   623
      LEMON_ASSERT(!_skip_nodes, "Multiple usage of skipNodes() member");
deba@185
   624
      _skip_nodes = true;
deba@127
   625
      return *this;
deba@127
   626
    }
deba@127
   627
alpar@156
   628
    /// \brief Skip writing arc set
alpar@156
   629
    ///
kpeter@192
   630
    /// The \c \@arcs section will not be written to the stream.
deba@127
   631
    DigraphWriter& skipArcs() {
deba@127
   632
      LEMON_ASSERT(!_skip_arcs, "Multiple usage of skipArcs() member");
deba@185
   633
      _skip_arcs = true;
deba@127
   634
      return *this;
deba@127
   635
    }
deba@127
   636
alpar@156
   637
    /// @}
alpar@156
   638
deba@127
   639
  private:
deba@127
   640
deba@127
   641
    void writeNodes() {
deba@127
   642
      _writer_bits::MapStorageBase<Node>* label = 0;
deba@127
   643
      for (typename NodeMaps::iterator it = _node_maps.begin();
alpar@209
   644
           it != _node_maps.end(); ++it) {
deba@127
   645
        if (it->first == "label") {
alpar@209
   646
          label = it->second;
alpar@209
   647
          break;
alpar@209
   648
        }
deba@127
   649
      }
deba@127
   650
deba@127
   651
      *_os << "@nodes";
deba@127
   652
      if (!_nodes_caption.empty()) {
alpar@209
   653
        _writer_bits::writeToken(*_os << ' ', _nodes_caption);
deba@127
   654
      }
deba@127
   655
      *_os << std::endl;
deba@127
   656
deba@127
   657
      if (label == 0) {
alpar@209
   658
        *_os << "label" << '\t';
deba@127
   659
      }
deba@127
   660
      for (typename NodeMaps::iterator it = _node_maps.begin();
alpar@209
   661
           it != _node_maps.end(); ++it) {
alpar@209
   662
        _writer_bits::writeToken(*_os, it->first) << '\t';
deba@127
   663
      }
deba@127
   664
      *_os << std::endl;
deba@127
   665
deba@127
   666
      std::vector<Node> nodes;
deba@127
   667
      for (NodeIt n(_digraph); n != INVALID; ++n) {
alpar@209
   668
        nodes.push_back(n);
deba@127
   669
      }
alpar@209
   670
deba@127
   671
      if (label == 0) {
alpar@209
   672
        IdMap<Digraph, Node> id_map(_digraph);
alpar@209
   673
        _writer_bits::MapLess<IdMap<Digraph, Node> > id_less(id_map);
alpar@209
   674
        std::sort(nodes.begin(), nodes.end(), id_less);
deba@127
   675
      } else {
alpar@209
   676
        label->sort(nodes);
deba@127
   677
      }
deba@127
   678
deba@127
   679
      for (int i = 0; i < static_cast<int>(nodes.size()); ++i) {
alpar@209
   680
        Node n = nodes[i];
alpar@209
   681
        if (label == 0) {
alpar@209
   682
          std::ostringstream os;
alpar@209
   683
          os << _digraph.id(n);
alpar@209
   684
          _writer_bits::writeToken(*_os, os.str());
alpar@209
   685
          *_os << '\t';
alpar@209
   686
          _node_index.insert(std::make_pair(n, os.str()));
alpar@209
   687
        }
alpar@209
   688
        for (typename NodeMaps::iterator it = _node_maps.begin();
alpar@209
   689
             it != _node_maps.end(); ++it) {
alpar@209
   690
          std::string value = it->second->get(n);
alpar@209
   691
          _writer_bits::writeToken(*_os, value);
alpar@209
   692
          if (it->first == "label") {
alpar@209
   693
            _node_index.insert(std::make_pair(n, value));
alpar@209
   694
          }
alpar@209
   695
          *_os << '\t';
alpar@209
   696
        }
alpar@209
   697
        *_os << std::endl;
deba@127
   698
      }
deba@127
   699
    }
deba@127
   700
deba@185
   701
    void createNodeIndex() {
deba@185
   702
      _writer_bits::MapStorageBase<Node>* label = 0;
deba@185
   703
      for (typename NodeMaps::iterator it = _node_maps.begin();
alpar@209
   704
           it != _node_maps.end(); ++it) {
deba@185
   705
        if (it->first == "label") {
alpar@209
   706
          label = it->second;
alpar@209
   707
          break;
alpar@209
   708
        }
deba@185
   709
      }
deba@185
   710
deba@185
   711
      if (label == 0) {
alpar@209
   712
        for (NodeIt n(_digraph); n != INVALID; ++n) {
alpar@209
   713
          std::ostringstream os;
alpar@209
   714
          os << _digraph.id(n);
alpar@209
   715
          _node_index.insert(std::make_pair(n, os.str()));
alpar@209
   716
        }
deba@185
   717
      } else {
alpar@209
   718
        for (NodeIt n(_digraph); n != INVALID; ++n) {
alpar@209
   719
          std::string value = label->get(n);
alpar@209
   720
          _node_index.insert(std::make_pair(n, value));
alpar@209
   721
        }
deba@185
   722
      }
deba@185
   723
    }
deba@185
   724
deba@127
   725
    void writeArcs() {
deba@127
   726
      _writer_bits::MapStorageBase<Arc>* label = 0;
deba@127
   727
      for (typename ArcMaps::iterator it = _arc_maps.begin();
alpar@209
   728
           it != _arc_maps.end(); ++it) {
deba@127
   729
        if (it->first == "label") {
alpar@209
   730
          label = it->second;
alpar@209
   731
          break;
alpar@209
   732
        }
deba@127
   733
      }
deba@127
   734
deba@127
   735
      *_os << "@arcs";
deba@127
   736
      if (!_arcs_caption.empty()) {
alpar@209
   737
        _writer_bits::writeToken(*_os << ' ', _arcs_caption);
deba@127
   738
      }
deba@127
   739
      *_os << std::endl;
deba@127
   740
deba@127
   741
      *_os << '\t' << '\t';
deba@127
   742
      if (label == 0) {
alpar@209
   743
        *_os << "label" << '\t';
deba@127
   744
      }
deba@127
   745
      for (typename ArcMaps::iterator it = _arc_maps.begin();
alpar@209
   746
           it != _arc_maps.end(); ++it) {
alpar@209
   747
        _writer_bits::writeToken(*_os, it->first) << '\t';
deba@127
   748
      }
deba@127
   749
      *_os << std::endl;
deba@127
   750
deba@127
   751
      std::vector<Arc> arcs;
deba@127
   752
      for (ArcIt n(_digraph); n != INVALID; ++n) {
alpar@209
   753
        arcs.push_back(n);
deba@127
   754
      }
alpar@209
   755
deba@127
   756
      if (label == 0) {
alpar@209
   757
        IdMap<Digraph, Arc> id_map(_digraph);
alpar@209
   758
        _writer_bits::MapLess<IdMap<Digraph, Arc> > id_less(id_map);
alpar@209
   759
        std::sort(arcs.begin(), arcs.end(), id_less);
deba@127
   760
      } else {
alpar@209
   761
        label->sort(arcs);
deba@127
   762
      }
deba@127
   763
deba@127
   764
      for (int i = 0; i < static_cast<int>(arcs.size()); ++i) {
alpar@209
   765
        Arc a = arcs[i];
alpar@209
   766
        _writer_bits::writeToken(*_os, _node_index.
alpar@209
   767
                                 find(_digraph.source(a))->second);
alpar@209
   768
        *_os << '\t';
alpar@209
   769
        _writer_bits::writeToken(*_os, _node_index.
alpar@209
   770
                                 find(_digraph.target(a))->second);
alpar@209
   771
        *_os << '\t';
alpar@209
   772
        if (label == 0) {
alpar@209
   773
          std::ostringstream os;
alpar@209
   774
          os << _digraph.id(a);
alpar@209
   775
          _writer_bits::writeToken(*_os, os.str());
alpar@209
   776
          *_os << '\t';
alpar@209
   777
          _arc_index.insert(std::make_pair(a, os.str()));
alpar@209
   778
        }
alpar@209
   779
        for (typename ArcMaps::iterator it = _arc_maps.begin();
alpar@209
   780
             it != _arc_maps.end(); ++it) {
alpar@209
   781
          std::string value = it->second->get(a);
alpar@209
   782
          _writer_bits::writeToken(*_os, value);
alpar@209
   783
          if (it->first == "label") {
alpar@209
   784
            _arc_index.insert(std::make_pair(a, value));
alpar@209
   785
          }
alpar@209
   786
          *_os << '\t';
alpar@209
   787
        }
alpar@209
   788
        *_os << std::endl;
deba@127
   789
      }
deba@127
   790
    }
deba@127
   791
deba@185
   792
    void createArcIndex() {
deba@185
   793
      _writer_bits::MapStorageBase<Arc>* label = 0;
deba@185
   794
      for (typename ArcMaps::iterator it = _arc_maps.begin();
alpar@209
   795
           it != _arc_maps.end(); ++it) {
deba@185
   796
        if (it->first == "label") {
alpar@209
   797
          label = it->second;
alpar@209
   798
          break;
alpar@209
   799
        }
deba@185
   800
      }
deba@185
   801
deba@185
   802
      if (label == 0) {
alpar@209
   803
        for (ArcIt a(_digraph); a != INVALID; ++a) {
alpar@209
   804
          std::ostringstream os;
alpar@209
   805
          os << _digraph.id(a);
alpar@209
   806
          _arc_index.insert(std::make_pair(a, os.str()));
alpar@209
   807
        }
deba@185
   808
      } else {
alpar@209
   809
        for (ArcIt a(_digraph); a != INVALID; ++a) {
alpar@209
   810
          std::string value = label->get(a);
alpar@209
   811
          _arc_index.insert(std::make_pair(a, value));
alpar@209
   812
        }
deba@185
   813
      }
deba@185
   814
    }
deba@185
   815
deba@127
   816
    void writeAttributes() {
deba@127
   817
      if (_attributes.empty()) return;
deba@127
   818
      *_os << "@attributes";
deba@127
   819
      if (!_attributes_caption.empty()) {
alpar@209
   820
        _writer_bits::writeToken(*_os << ' ', _attributes_caption);
deba@127
   821
      }
deba@127
   822
      *_os << std::endl;
deba@127
   823
      for (typename Attributes::iterator it = _attributes.begin();
alpar@209
   824
           it != _attributes.end(); ++it) {
alpar@209
   825
        _writer_bits::writeToken(*_os, it->first) << ' ';
alpar@209
   826
        _writer_bits::writeToken(*_os, it->second->get());
alpar@209
   827
        *_os << std::endl;
deba@127
   828
      }
deba@127
   829
    }
alpar@209
   830
deba@127
   831
  public:
alpar@209
   832
alpar@209
   833
    /// \name Execution of the writer
alpar@156
   834
    /// @{
alpar@156
   835
alpar@156
   836
    /// \brief Start the batch processing
alpar@156
   837
    ///
kpeter@192
   838
    /// This function starts the batch processing.
deba@127
   839
    void run() {
deba@127
   840
      if (!_skip_nodes) {
alpar@209
   841
        writeNodes();
deba@185
   842
      } else {
alpar@209
   843
        createNodeIndex();
deba@127
   844
      }
alpar@209
   845
      if (!_skip_arcs) {
alpar@209
   846
        writeArcs();
deba@185
   847
      } else {
alpar@209
   848
        createArcIndex();
deba@127
   849
      }
deba@127
   850
      writeAttributes();
deba@127
   851
    }
deba@127
   852
kpeter@192
   853
    /// \brief Give back the stream of the writer
alpar@156
   854
    ///
kpeter@192
   855
    /// Give back the stream of the writer.
alpar@156
   856
    std::ostream& ostream() {
deba@127
   857
      return *_os;
deba@127
   858
    }
alpar@156
   859
alpar@156
   860
    /// @}
deba@127
   861
  };
deba@127
   862
kpeter@192
   863
  /// \brief Return a \ref DigraphWriter class
alpar@209
   864
  ///
kpeter@192
   865
  /// This function just returns a \ref DigraphWriter class.
alpar@156
   866
  /// \relates DigraphWriter
deba@127
   867
  template <typename Digraph>
alpar@209
   868
  DigraphWriter<Digraph> digraphWriter(std::ostream& os,
alpar@209
   869
                                       const Digraph& digraph) {
deba@163
   870
    DigraphWriter<Digraph> tmp(os, digraph);
deba@163
   871
    return tmp;
deba@127
   872
  }
deba@127
   873
kpeter@192
   874
  /// \brief Return a \ref DigraphWriter class
alpar@209
   875
  ///
kpeter@192
   876
  /// This function just returns a \ref DigraphWriter class.
alpar@156
   877
  /// \relates DigraphWriter
deba@127
   878
  template <typename Digraph>
alpar@209
   879
  DigraphWriter<Digraph> digraphWriter(const std::string& fn,
alpar@209
   880
                                       const Digraph& digraph) {
deba@163
   881
    DigraphWriter<Digraph> tmp(fn, digraph);
deba@163
   882
    return tmp;
deba@127
   883
  }
deba@127
   884
kpeter@192
   885
  /// \brief Return a \ref DigraphWriter class
alpar@209
   886
  ///
kpeter@192
   887
  /// This function just returns a \ref DigraphWriter class.
alpar@156
   888
  /// \relates DigraphWriter
deba@127
   889
  template <typename Digraph>
alpar@209
   890
  DigraphWriter<Digraph> digraphWriter(const char* fn,
alpar@209
   891
                                       const Digraph& digraph) {
deba@163
   892
    DigraphWriter<Digraph> tmp(fn, digraph);
deba@163
   893
    return tmp;
deba@127
   894
  }
deba@165
   895
deba@190
   896
  template <typename Graph>
deba@190
   897
  class GraphWriter;
deba@190
   898
deba@190
   899
  template <typename Graph>
alpar@209
   900
  GraphWriter<Graph> graphWriter(std::ostream& os, const Graph& graph);
deba@190
   901
deba@190
   902
  template <typename Graph>
alpar@209
   903
  GraphWriter<Graph> graphWriter(const std::string& fn, const Graph& graph);
deba@190
   904
deba@190
   905
  template <typename Graph>
alpar@209
   906
  GraphWriter<Graph> graphWriter(const char *fn, const Graph& graph);
deba@190
   907
deba@165
   908
  /// \ingroup lemon_io
alpar@209
   909
  ///
kpeter@192
   910
  /// \brief \ref lgf-format "LGF" writer for directed graphs
deba@165
   911
  ///
deba@165
   912
  /// This utility writes an \ref lgf-format "LGF" file.
kpeter@192
   913
  ///
kpeter@192
   914
  /// It can be used almost the same way as \c DigraphWriter.
kpeter@192
   915
  /// The only difference is that this class can handle edges and
kpeter@192
   916
  /// edge maps as well as arcs and arc maps.
deba@201
   917
  ///
deba@201
   918
  /// The arc maps are written into the file as two columns, the
deba@201
   919
  /// caption of the columns are the name of the map prefixed with \c
deba@201
   920
  /// '+' and \c '-'. The arcs are written into the \c \@attributes
deba@201
   921
  /// section as a \c '+' or a \c '-' prefix (depends on the direction
deba@201
   922
  /// of the arc) and the label of corresponding edge.
deba@165
   923
  template <typename _Graph>
deba@165
   924
  class GraphWriter {
deba@165
   925
  public:
deba@165
   926
deba@165
   927
    typedef _Graph Graph;
deba@165
   928
    TEMPLATE_GRAPH_TYPEDEFS(Graph);
alpar@209
   929
deba@165
   930
  private:
deba@165
   931
deba@165
   932
deba@165
   933
    std::ostream* _os;
deba@165
   934
    bool local_os;
deba@165
   935
deba@165
   936
    Graph& _graph;
deba@165
   937
deba@165
   938
    std::string _nodes_caption;
deba@165
   939
    std::string _edges_caption;
deba@165
   940
    std::string _attributes_caption;
alpar@209
   941
deba@165
   942
    typedef std::map<Node, std::string> NodeIndex;
deba@165
   943
    NodeIndex _node_index;
deba@165
   944
    typedef std::map<Edge, std::string> EdgeIndex;
deba@165
   945
    EdgeIndex _edge_index;
deba@165
   946
alpar@209
   947
    typedef std::vector<std::pair<std::string,
alpar@209
   948
      _writer_bits::MapStorageBase<Node>* > > NodeMaps;
alpar@209
   949
    NodeMaps _node_maps;
deba@165
   950
alpar@209
   951
    typedef std::vector<std::pair<std::string,
deba@165
   952
      _writer_bits::MapStorageBase<Edge>* > >EdgeMaps;
deba@165
   953
    EdgeMaps _edge_maps;
deba@165
   954
alpar@209
   955
    typedef std::vector<std::pair<std::string,
deba@165
   956
      _writer_bits::ValueStorageBase*> > Attributes;
deba@165
   957
    Attributes _attributes;
deba@165
   958
deba@165
   959
    bool _skip_nodes;
deba@165
   960
    bool _skip_edges;
deba@165
   961
deba@165
   962
  public:
deba@165
   963
deba@165
   964
    /// \brief Constructor
deba@165
   965
    ///
deba@165
   966
    /// Construct a directed graph writer, which writes to the given
deba@165
   967
    /// output stream.
alpar@209
   968
    GraphWriter(std::ostream& is, const Graph& graph)
deba@165
   969
      : _os(&is), local_os(false), _graph(graph),
alpar@209
   970
        _skip_nodes(false), _skip_edges(false) {}
deba@165
   971
deba@165
   972
    /// \brief Constructor
deba@165
   973
    ///
deba@165
   974
    /// Construct a directed graph writer, which writes to the given
deba@165
   975
    /// output file.
alpar@209
   976
    GraphWriter(const std::string& fn, const Graph& graph)
deba@165
   977
      : _os(new std::ofstream(fn.c_str())), local_os(true), _graph(graph),
alpar@209
   978
        _skip_nodes(false), _skip_edges(false) {}
deba@165
   979
deba@165
   980
    /// \brief Constructor
deba@165
   981
    ///
deba@165
   982
    /// Construct a directed graph writer, which writes to the given
deba@165
   983
    /// output file.
alpar@209
   984
    GraphWriter(const char* fn, const Graph& graph)
deba@165
   985
      : _os(new std::ofstream(fn)), local_os(true), _graph(graph),
alpar@209
   986
        _skip_nodes(false), _skip_edges(false) {}
deba@165
   987
deba@165
   988
    /// \brief Destructor
deba@165
   989
    ~GraphWriter() {
alpar@209
   990
      for (typename NodeMaps::iterator it = _node_maps.begin();
alpar@209
   991
           it != _node_maps.end(); ++it) {
alpar@209
   992
        delete it->second;
deba@165
   993
      }
deba@165
   994
alpar@209
   995
      for (typename EdgeMaps::iterator it = _edge_maps.begin();
alpar@209
   996
           it != _edge_maps.end(); ++it) {
alpar@209
   997
        delete it->second;
deba@165
   998
      }
deba@165
   999
alpar@209
  1000
      for (typename Attributes::iterator it = _attributes.begin();
alpar@209
  1001
           it != _attributes.end(); ++it) {
alpar@209
  1002
        delete it->second;
deba@165
  1003
      }
deba@165
  1004
deba@165
  1005
      if (local_os) {
alpar@209
  1006
        delete _os;
deba@165
  1007
      }
deba@165
  1008
    }
alpar@209
  1009
deba@190
  1010
  private:
deba@165
  1011
alpar@209
  1012
    friend GraphWriter<Graph> graphWriter<>(std::ostream& os,
alpar@209
  1013
                                            const Graph& graph);
alpar@209
  1014
    friend GraphWriter<Graph> graphWriter<>(const std::string& fn,
alpar@209
  1015
                                            const Graph& graph);
alpar@209
  1016
    friend GraphWriter<Graph> graphWriter<>(const char *fn,
alpar@209
  1017
                                            const Graph& graph);
deba@190
  1018
alpar@209
  1019
    GraphWriter(GraphWriter& other)
deba@190
  1020
      : _os(other._os), local_os(other.local_os), _graph(other._graph),
alpar@209
  1021
        _skip_nodes(other._skip_nodes), _skip_edges(other._skip_edges) {
deba@190
  1022
deba@190
  1023
      other._os = 0;
deba@190
  1024
      other.local_os = false;
deba@190
  1025
deba@190
  1026
      _node_index.swap(other._node_index);
deba@190
  1027
      _edge_index.swap(other._edge_index);
deba@190
  1028
deba@190
  1029
      _node_maps.swap(other._node_maps);
deba@190
  1030
      _edge_maps.swap(other._edge_maps);
deba@190
  1031
      _attributes.swap(other._attributes);
deba@190
  1032
deba@190
  1033
      _nodes_caption = other._nodes_caption;
deba@190
  1034
      _edges_caption = other._edges_caption;
deba@190
  1035
      _attributes_caption = other._attributes_caption;
deba@190
  1036
    }
deba@190
  1037
deba@165
  1038
    GraphWriter& operator=(const GraphWriter&);
deba@165
  1039
deba@165
  1040
  public:
deba@165
  1041
deba@165
  1042
    /// \name Writing rules
deba@165
  1043
    /// @{
alpar@209
  1044
kpeter@192
  1045
    /// \brief Node map writing rule
deba@165
  1046
    ///
kpeter@192
  1047
    /// Add a node map writing rule to the writer.
deba@165
  1048
    template <typename Map>
deba@165
  1049
    GraphWriter& nodeMap(const std::string& caption, const Map& map) {
deba@165
  1050
      checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>();
alpar@209
  1051
      _writer_bits::MapStorageBase<Node>* storage =
alpar@209
  1052
        new _writer_bits::MapStorage<Node, Map>(map);
deba@165
  1053
      _node_maps.push_back(std::make_pair(caption, storage));
deba@165
  1054
      return *this;
deba@165
  1055
    }
deba@165
  1056
deba@165
  1057
    /// \brief Node map writing rule
deba@165
  1058
    ///
deba@165
  1059
    /// Add a node map writing rule with specialized converter to the
deba@165
  1060
    /// writer.
deba@165
  1061
    template <typename Map, typename Converter>
alpar@209
  1062
    GraphWriter& nodeMap(const std::string& caption, const Map& map,
alpar@209
  1063
                           const Converter& converter = Converter()) {
deba@165
  1064
      checkConcept<concepts::ReadMap<Node, typename Map::Value>, Map>();
alpar@209
  1065
      _writer_bits::MapStorageBase<Node>* storage =
alpar@209
  1066
        new _writer_bits::MapStorage<Node, Map, Converter>(map, converter);
deba@165
  1067
      _node_maps.push_back(std::make_pair(caption, storage));
deba@165
  1068
      return *this;
deba@165
  1069
    }
deba@165
  1070
deba@165
  1071
    /// \brief Edge map writing rule
deba@165
  1072
    ///
deba@165
  1073
    /// Add an edge map writing rule to the writer.
deba@165
  1074
    template <typename Map>
deba@165
  1075
    GraphWriter& edgeMap(const std::string& caption, const Map& map) {
deba@165
  1076
      checkConcept<concepts::ReadMap<Edge, typename Map::Value>, Map>();
alpar@209
  1077
      _writer_bits::MapStorageBase<Edge>* storage =
alpar@209
  1078
        new _writer_bits::MapStorage<Edge, Map>(map);
deba@165
  1079
      _edge_maps.push_back(std::make_pair(caption, storage));
deba@165
  1080
      return *this;
deba@165
  1081
    }
deba@165
  1082
deba@165
  1083
    /// \brief Edge map writing rule
deba@165
  1084
    ///
deba@165
  1085
    /// Add an edge map writing rule with specialized converter to the
deba@165
  1086
    /// writer.
deba@165
  1087
    template <typename Map, typename Converter>
alpar@209
  1088
    GraphWriter& edgeMap(const std::string& caption, const Map& map,
alpar@209
  1089
                          const Converter& converter = Converter()) {
deba@165
  1090
      checkConcept<concepts::ReadMap<Edge, typename Map::Value>, Map>();
alpar@209
  1091
      _writer_bits::MapStorageBase<Edge>* storage =
alpar@209
  1092
        new _writer_bits::MapStorage<Edge, Map, Converter>(map, converter);
deba@165
  1093
      _edge_maps.push_back(std::make_pair(caption, storage));
deba@165
  1094
      return *this;
deba@165
  1095
    }
deba@165
  1096
deba@165
  1097
    /// \brief Arc map writing rule
deba@165
  1098
    ///
deba@165
  1099
    /// Add an arc map writing rule to the writer.
deba@165
  1100
    template <typename Map>
deba@165
  1101
    GraphWriter& arcMap(const std::string& caption, const Map& map) {
deba@165
  1102
      checkConcept<concepts::ReadMap<Arc, typename Map::Value>, Map>();
alpar@209
  1103
      _writer_bits::MapStorageBase<Edge>* forward_storage =
alpar@209
  1104
        new _writer_bits::GraphArcMapStorage<Graph, true, Map>(_graph, map);
deba@165
  1105
      _edge_maps.push_back(std::make_pair('+' + caption, forward_storage));
alpar@209
  1106
      _writer_bits::MapStorageBase<Edge>* backward_storage =
alpar@209
  1107
        new _writer_bits::GraphArcMapStorage<Graph, false, Map>(_graph, map);
deba@165
  1108
      _edge_maps.push_back(std::make_pair('-' + caption, backward_storage));
deba@165
  1109
      return *this;
deba@165
  1110
    }
deba@165
  1111
deba@165
  1112
    /// \brief Arc map writing rule
deba@165
  1113
    ///
deba@165
  1114
    /// Add an arc map writing rule with specialized converter to the
deba@165
  1115
    /// writer.
deba@165
  1116
    template <typename Map, typename Converter>
alpar@209
  1117
    GraphWriter& arcMap(const std::string& caption, const Map& map,
alpar@209
  1118
                          const Converter& converter = Converter()) {
deba@165
  1119
      checkConcept<concepts::ReadMap<Arc, typename Map::Value>, Map>();
alpar@209
  1120
      _writer_bits::MapStorageBase<Edge>* forward_storage =
alpar@209
  1121
        new _writer_bits::GraphArcMapStorage<Graph, true, Map, Converter>
alpar@209
  1122
        (_graph, map, converter);
deba@165
  1123
      _edge_maps.push_back(std::make_pair('+' + caption, forward_storage));
alpar@209
  1124
      _writer_bits::MapStorageBase<Edge>* backward_storage =
alpar@209
  1125
        new _writer_bits::GraphArcMapStorage<Graph, false, Map, Converter>
alpar@209
  1126
        (_graph, map, converter);
deba@165
  1127
      _edge_maps.push_back(std::make_pair('-' + caption, backward_storage));
deba@165
  1128
      return *this;
deba@165
  1129
    }
deba@165
  1130
deba@165
  1131
    /// \brief Attribute writing rule
deba@165
  1132
    ///
deba@165
  1133
    /// Add an attribute writing rule to the writer.
deba@165
  1134
    template <typename Value>
deba@165
  1135
    GraphWriter& attribute(const std::string& caption, const Value& value) {
alpar@209
  1136
      _writer_bits::ValueStorageBase* storage =
alpar@209
  1137
        new _writer_bits::ValueStorage<Value>(value);
deba@165
  1138
      _attributes.push_back(std::make_pair(caption, storage));
deba@165
  1139
      return *this;
deba@165
  1140
    }
deba@165
  1141
deba@165
  1142
    /// \brief Attribute writing rule
deba@165
  1143
    ///
deba@165
  1144
    /// Add an attribute writing rule with specialized converter to the
deba@165
  1145
    /// writer.
deba@165
  1146
    template <typename Value, typename Converter>
alpar@209
  1147
    GraphWriter& attribute(const std::string& caption, const Value& value,
alpar@209
  1148
                             const Converter& converter = Converter()) {
alpar@209
  1149
      _writer_bits::ValueStorageBase* storage =
alpar@209
  1150
        new _writer_bits::ValueStorage<Value, Converter>(value, converter);
deba@165
  1151
      _attributes.push_back(std::make_pair(caption, storage));
deba@165
  1152
      return *this;
deba@165
  1153
    }
deba@165
  1154
deba@165
  1155
    /// \brief Node writing rule
deba@165
  1156
    ///
deba@165
  1157
    /// Add a node writing rule to the writer.
deba@165
  1158
    GraphWriter& node(const std::string& caption, const Node& node) {
deba@165
  1159
      typedef _writer_bits::MapLookUpConverter<Node> Converter;
deba@165
  1160
      Converter converter(_node_index);
alpar@209
  1161
      _writer_bits::ValueStorageBase* storage =
alpar@209
  1162
        new _writer_bits::ValueStorage<Node, Converter>(node, converter);
deba@165
  1163
      _attributes.push_back(std::make_pair(caption, storage));
deba@165
  1164
      return *this;
deba@165
  1165
    }
deba@165
  1166
deba@165
  1167
    /// \brief Edge writing rule
deba@165
  1168
    ///
deba@165
  1169
    /// Add an edge writing rule to writer.
deba@165
  1170
    GraphWriter& edge(const std::string& caption, const Edge& edge) {
deba@165
  1171
      typedef _writer_bits::MapLookUpConverter<Edge> Converter;
deba@165
  1172
      Converter converter(_edge_index);
alpar@209
  1173
      _writer_bits::ValueStorageBase* storage =
alpar@209
  1174
        new _writer_bits::ValueStorage<Edge, Converter>(edge, converter);
deba@165
  1175
      _attributes.push_back(std::make_pair(caption, storage));
deba@165
  1176
      return *this;
deba@165
  1177
    }
deba@165
  1178
deba@165
  1179
    /// \brief Arc writing rule
deba@165
  1180
    ///
deba@165
  1181
    /// Add an arc writing rule to writer.
deba@165
  1182
    GraphWriter& arc(const std::string& caption, const Arc& arc) {
deba@165
  1183
      typedef _writer_bits::GraphArcLookUpConverter<Graph> Converter;
deba@165
  1184
      Converter converter(_graph, _edge_index);
alpar@209
  1185
      _writer_bits::ValueStorageBase* storage =
alpar@209
  1186
        new _writer_bits::ValueStorage<Arc, Converter>(arc, converter);
deba@165
  1187
      _attributes.push_back(std::make_pair(caption, storage));
deba@165
  1188
      return *this;
deba@165
  1189
    }
deba@165
  1190
kpeter@192
  1191
    /// \name Section captions
deba@165
  1192
    /// @{
deba@165
  1193
kpeter@192
  1194
    /// \brief Add an additional caption to the \c \@nodes section
deba@165
  1195
    ///
kpeter@192
  1196
    /// Add an additional caption to the \c \@nodes section.
deba@165
  1197
    GraphWriter& nodes(const std::string& caption) {
deba@165
  1198
      _nodes_caption = caption;
deba@165
  1199
      return *this;
deba@165
  1200
    }
deba@165
  1201
kpeter@192
  1202
    /// \brief Add an additional caption to the \c \@arcs section
deba@165
  1203
    ///
kpeter@192
  1204
    /// Add an additional caption to the \c \@arcs section.
deba@165
  1205
    GraphWriter& edges(const std::string& caption) {
deba@165
  1206
      _edges_caption = caption;
deba@165
  1207
      return *this;
deba@165
  1208
    }
deba@165
  1209
kpeter@192
  1210
    /// \brief Add an additional caption to the \c \@attributes section
deba@165
  1211
    ///
kpeter@192
  1212
    /// Add an additional caption to the \c \@attributes section.
deba@165
  1213
    GraphWriter& attributes(const std::string& caption) {
deba@165
  1214
      _attributes_caption = caption;
deba@165
  1215
      return *this;
deba@165
  1216
    }
deba@165
  1217
deba@165
  1218
    /// \name Skipping section
deba@165
  1219
    /// @{
deba@165
  1220
deba@165
  1221
    /// \brief Skip writing the node set
deba@165
  1222
    ///
kpeter@192
  1223
    /// The \c \@nodes section will not be written to the stream.
deba@165
  1224
    GraphWriter& skipNodes() {
deba@165
  1225
      LEMON_ASSERT(!_skip_nodes, "Multiple usage of skipNodes() member");
deba@185
  1226
      _skip_nodes = true;
deba@165
  1227
      return *this;
deba@165
  1228
    }
deba@165
  1229
deba@165
  1230
    /// \brief Skip writing edge set
deba@165
  1231
    ///
kpeter@192
  1232
    /// The \c \@edges section will not be written to the stream.
deba@165
  1233
    GraphWriter& skipEdges() {
deba@165
  1234
      LEMON_ASSERT(!_skip_edges, "Multiple usage of skipEdges() member");
deba@185
  1235
      _skip_edges = true;
deba@165
  1236
      return *this;
deba@165
  1237
    }
deba@165
  1238
deba@165
  1239
    /// @}
deba@165
  1240
deba@165
  1241
  private:
deba@165
  1242
deba@165
  1243
    void writeNodes() {
deba@165
  1244
      _writer_bits::MapStorageBase<Node>* label = 0;
deba@165
  1245
      for (typename NodeMaps::iterator it = _node_maps.begin();
alpar@209
  1246
           it != _node_maps.end(); ++it) {
deba@165
  1247
        if (it->first == "label") {
alpar@209
  1248
          label = it->second;
alpar@209
  1249
          break;
alpar@209
  1250
        }
deba@165
  1251
      }
deba@165
  1252
deba@165
  1253
      *_os << "@nodes";
deba@165
  1254
      if (!_nodes_caption.empty()) {
alpar@209
  1255
        _writer_bits::writeToken(*_os << ' ', _nodes_caption);
deba@165
  1256
      }
deba@165
  1257
      *_os << std::endl;
deba@165
  1258
deba@165
  1259
      if (label == 0) {
alpar@209
  1260
        *_os << "label" << '\t';
deba@165
  1261
      }
deba@165
  1262
      for (typename NodeMaps::iterator it = _node_maps.begin();
alpar@209
  1263
           it != _node_maps.end(); ++it) {
alpar@209
  1264
        _writer_bits::writeToken(*_os, it->first) << '\t';
deba@165
  1265
      }
deba@165
  1266
      *_os << std::endl;
deba@165
  1267
deba@165
  1268
      std::vector<Node> nodes;
deba@165
  1269
      for (NodeIt n(_graph); n != INVALID; ++n) {
alpar@209
  1270
        nodes.push_back(n);
deba@165
  1271
      }
alpar@209
  1272
deba@165
  1273
      if (label == 0) {
alpar@209
  1274
        IdMap<Graph, Node> id_map(_graph);
alpar@209
  1275
        _writer_bits::MapLess<IdMap<Graph, Node> > id_less(id_map);
alpar@209
  1276
        std::sort(nodes.begin(), nodes.end(), id_less);
deba@165
  1277
      } else {
alpar@209
  1278
        label->sort(nodes);
deba@165
  1279
      }
deba@165
  1280
deba@165
  1281
      for (int i = 0; i < static_cast<int>(nodes.size()); ++i) {
alpar@209
  1282
        Node n = nodes[i];
alpar@209
  1283
        if (label == 0) {
alpar@209
  1284
          std::ostringstream os;
alpar@209
  1285
          os << _graph.id(n);
alpar@209
  1286
          _writer_bits::writeToken(*_os, os.str());
alpar@209
  1287
          *_os << '\t';
alpar@209
  1288
          _node_index.insert(std::make_pair(n, os.str()));
alpar@209
  1289
        }
alpar@209
  1290
        for (typename NodeMaps::iterator it = _node_maps.begin();
alpar@209
  1291
             it != _node_maps.end(); ++it) {
alpar@209
  1292
          std::string value = it->second->get(n);
alpar@209
  1293
          _writer_bits::writeToken(*_os, value);
alpar@209
  1294
          if (it->first == "label") {
alpar@209
  1295
            _node_index.insert(std::make_pair(n, value));
alpar@209
  1296
          }
alpar@209
  1297
          *_os << '\t';
alpar@209
  1298
        }
alpar@209
  1299
        *_os << std::endl;
deba@165
  1300
      }
deba@165
  1301
    }
deba@165
  1302
deba@185
  1303
    void createNodeIndex() {
deba@185
  1304
      _writer_bits::MapStorageBase<Node>* label = 0;
deba@185
  1305
      for (typename NodeMaps::iterator it = _node_maps.begin();
alpar@209
  1306
           it != _node_maps.end(); ++it) {
deba@185
  1307
        if (it->first == "label") {
alpar@209
  1308
          label = it->second;
alpar@209
  1309
          break;
alpar@209
  1310
        }
deba@185
  1311
      }
deba@185
  1312
deba@185
  1313
      if (label == 0) {
alpar@209
  1314
        for (NodeIt n(_graph); n != INVALID; ++n) {
alpar@209
  1315
          std::ostringstream os;
alpar@209
  1316
          os << _graph.id(n);
alpar@209
  1317
          _node_index.insert(std::make_pair(n, os.str()));
alpar@209
  1318
        }
deba@185
  1319
      } else {
alpar@209
  1320
        for (NodeIt n(_graph); n != INVALID; ++n) {
alpar@209
  1321
          std::string value = label->get(n);
alpar@209
  1322
          _node_index.insert(std::make_pair(n, value));
alpar@209
  1323
        }
deba@185
  1324
      }
deba@185
  1325
    }
deba@185
  1326
deba@165
  1327
    void writeEdges() {
deba@165
  1328
      _writer_bits::MapStorageBase<Edge>* label = 0;
deba@165
  1329
      for (typename EdgeMaps::iterator it = _edge_maps.begin();
alpar@209
  1330
           it != _edge_maps.end(); ++it) {
deba@165
  1331
        if (it->first == "label") {
alpar@209
  1332
          label = it->second;
alpar@209
  1333
          break;
alpar@209
  1334
        }
deba@165
  1335
      }
deba@165
  1336
deba@165
  1337
      *_os << "@edges";
deba@165
  1338
      if (!_edges_caption.empty()) {
alpar@209
  1339
        _writer_bits::writeToken(*_os << ' ', _edges_caption);
deba@165
  1340
      }
deba@165
  1341
      *_os << std::endl;
deba@165
  1342
deba@165
  1343
      *_os << '\t' << '\t';
deba@165
  1344
      if (label == 0) {
alpar@209
  1345
        *_os << "label" << '\t';
deba@165
  1346
      }
deba@165
  1347
      for (typename EdgeMaps::iterator it = _edge_maps.begin();
alpar@209
  1348
           it != _edge_maps.end(); ++it) {
alpar@209
  1349
        _writer_bits::writeToken(*_os, it->first) << '\t';
deba@165
  1350
      }
deba@165
  1351
      *_os << std::endl;
deba@165
  1352
deba@165
  1353
      std::vector<Edge> edges;
deba@165
  1354
      for (EdgeIt n(_graph); n != INVALID; ++n) {
alpar@209
  1355
        edges.push_back(n);
deba@165
  1356
      }
alpar@209
  1357
deba@165
  1358
      if (label == 0) {
alpar@209
  1359
        IdMap<Graph, Edge> id_map(_graph);
alpar@209
  1360
        _writer_bits::MapLess<IdMap<Graph, Edge> > id_less(id_map);
alpar@209
  1361
        std::sort(edges.begin(), edges.end(), id_less);
deba@165
  1362
      } else {
alpar@209
  1363
        label->sort(edges);
deba@165
  1364
      }
deba@165
  1365
deba@165
  1366
      for (int i = 0; i < static_cast<int>(edges.size()); ++i) {
alpar@209
  1367
        Edge e = edges[i];
alpar@209
  1368
        _writer_bits::writeToken(*_os, _node_index.
alpar@209
  1369
                                 find(_graph.u(e))->second);
alpar@209
  1370
        *_os << '\t';
alpar@209
  1371
        _writer_bits::writeToken(*_os, _node_index.
alpar@209
  1372
                                 find(_graph.v(e))->second);
alpar@209
  1373
        *_os << '\t';
alpar@209
  1374
        if (label == 0) {
alpar@209
  1375
          std::ostringstream os;
alpar@209
  1376
          os << _graph.id(e);
alpar@209
  1377
          _writer_bits::writeToken(*_os, os.str());
alpar@209
  1378
          *_os << '\t';
alpar@209
  1379
          _edge_index.insert(std::make_pair(e, os.str()));
alpar@209
  1380
        }
alpar@209
  1381
        for (typename EdgeMaps::iterator it = _edge_maps.begin();
alpar@209
  1382
             it != _edge_maps.end(); ++it) {
alpar@209
  1383
          std::string value = it->second->get(e);
alpar@209
  1384
          _writer_bits::writeToken(*_os, value);
alpar@209
  1385
          if (it->first == "label") {
alpar@209
  1386
            _edge_index.insert(std::make_pair(e, value));
alpar@209
  1387
          }
alpar@209
  1388
          *_os << '\t';
alpar@209
  1389
        }
alpar@209
  1390
        *_os << std::endl;
deba@165
  1391
      }
deba@165
  1392
    }
deba@165
  1393
deba@185
  1394
    void createEdgeIndex() {
deba@185
  1395
      _writer_bits::MapStorageBase<Edge>* label = 0;
deba@185
  1396
      for (typename EdgeMaps::iterator it = _edge_maps.begin();
alpar@209
  1397
           it != _edge_maps.end(); ++it) {
deba@185
  1398
        if (it->first == "label") {
alpar@209
  1399
          label = it->second;
alpar@209
  1400
          break;
alpar@209
  1401
        }
deba@185
  1402
      }
deba@185
  1403
deba@185
  1404
      if (label == 0) {
alpar@209
  1405
        for (EdgeIt e(_graph); e != INVALID; ++e) {
alpar@209
  1406
          std::ostringstream os;
alpar@209
  1407
          os << _graph.id(e);
alpar@209
  1408
          _edge_index.insert(std::make_pair(e, os.str()));
alpar@209
  1409
        }
deba@185
  1410
      } else {
alpar@209
  1411
        for (EdgeIt e(_graph); e != INVALID; ++e) {
alpar@209
  1412
          std::string value = label->get(e);
alpar@209
  1413
          _edge_index.insert(std::make_pair(e, value));
alpar@209
  1414
        }
deba@185
  1415
      }
deba@185
  1416
    }
deba@185
  1417
deba@165
  1418
    void writeAttributes() {
deba@165
  1419
      if (_attributes.empty()) return;
deba@165
  1420
      *_os << "@attributes";
deba@165
  1421
      if (!_attributes_caption.empty()) {
alpar@209
  1422
        _writer_bits::writeToken(*_os << ' ', _attributes_caption);
deba@165
  1423
      }
deba@165
  1424
      *_os << std::endl;
deba@165
  1425
      for (typename Attributes::iterator it = _attributes.begin();
alpar@209
  1426
           it != _attributes.end(); ++it) {
alpar@209
  1427
        _writer_bits::writeToken(*_os, it->first) << ' ';
alpar@209
  1428
        _writer_bits::writeToken(*_os, it->second->get());
alpar@209
  1429
        *_os << std::endl;
deba@165
  1430
      }
deba@165
  1431
    }
alpar@209
  1432
deba@165
  1433
  public:
alpar@209
  1434
alpar@209
  1435
    /// \name Execution of the writer
deba@165
  1436
    /// @{
deba@165
  1437
deba@165
  1438
    /// \brief Start the batch processing
deba@165
  1439
    ///
kpeter@192
  1440
    /// This function starts the batch processing.
deba@165
  1441
    void run() {
deba@165
  1442
      if (!_skip_nodes) {
alpar@209
  1443
        writeNodes();
deba@185
  1444
      } else {
alpar@209
  1445
        createNodeIndex();
deba@165
  1446
      }
alpar@209
  1447
      if (!_skip_edges) {
alpar@209
  1448
        writeEdges();
deba@185
  1449
      } else {
alpar@209
  1450
        createEdgeIndex();
deba@165
  1451
      }
deba@165
  1452
      writeAttributes();
deba@165
  1453
    }
deba@165
  1454
kpeter@192
  1455
    /// \brief Give back the stream of the writer
deba@165
  1456
    ///
kpeter@192
  1457
    /// Give back the stream of the writer
deba@165
  1458
    std::ostream& ostream() {
deba@165
  1459
      return *_os;
deba@165
  1460
    }
deba@165
  1461
deba@165
  1462
    /// @}
deba@165
  1463
  };
deba@165
  1464
kpeter@192
  1465
  /// \brief Return a \ref GraphWriter class
alpar@209
  1466
  ///
kpeter@192
  1467
  /// This function just returns a \ref GraphWriter class.
deba@165
  1468
  /// \relates GraphWriter
deba@165
  1469
  template <typename Graph>
deba@190
  1470
  GraphWriter<Graph> graphWriter(std::ostream& os, const Graph& graph) {
deba@165
  1471
    GraphWriter<Graph> tmp(os, graph);
deba@165
  1472
    return tmp;
deba@165
  1473
  }
deba@165
  1474
kpeter@192
  1475
  /// \brief Return a \ref GraphWriter class
alpar@209
  1476
  ///
kpeter@192
  1477
  /// This function just returns a \ref GraphWriter class.
deba@165
  1478
  /// \relates GraphWriter
deba@165
  1479
  template <typename Graph>
deba@190
  1480
  GraphWriter<Graph> graphWriter(const std::string& fn, const Graph& graph) {
deba@165
  1481
    GraphWriter<Graph> tmp(fn, graph);
deba@165
  1482
    return tmp;
deba@165
  1483
  }
deba@165
  1484
kpeter@192
  1485
  /// \brief Return a \ref GraphWriter class
alpar@209
  1486
  ///
kpeter@192
  1487
  /// This function just returns a \ref GraphWriter class.
deba@165
  1488
  /// \relates GraphWriter
deba@165
  1489
  template <typename Graph>
deba@190
  1490
  GraphWriter<Graph> graphWriter(const char* fn, const Graph& graph) {
deba@165
  1491
    GraphWriter<Graph> tmp(fn, graph);
deba@165
  1492
    return tmp;
deba@165
  1493
  }
deba@127
  1494
}
deba@127
  1495
deba@127
  1496
#endif