deba@1408: /* -*- C++ -*-
ladanyi@1435:  * lemon/lemon_reader.h - Part of LEMON, a generic C++ optimization library
deba@1408:  *
deba@1408:  * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
deba@1408:  * (Egervary Research Group on Combinatorial Optimization, EGRES).
deba@1408:  *
deba@1408:  * Permission to use, modify and distribute this software is granted
deba@1408:  * provided that this copyright notice appears in all copies. For
deba@1408:  * precise terms see the accompanying LICENSE file.
deba@1408:  *
deba@1408:  * This software is provided "AS IS" with no warranty of any kind,
deba@1408:  * express or implied, and with no claim as to its suitability for any
deba@1408:  * purpose.
deba@1408:  *
deba@1408:  */
deba@1408: 
deba@1408: ///\ingroup io_group
deba@1408: ///\file
deba@1408: ///\brief Lemon Format reader.
deba@1408: 
deba@1421: 
deba@1408: #ifndef LEMON_LEMON_READER_H
deba@1408: #define LEMON_LEMON_READER_H
deba@1408: 
deba@1421: 
deba@1408: #include <iostream>
deba@1408: #include <fstream>
deba@1408: #include <string>
deba@1408: #include <vector>
deba@1408: #include <algorithm>
deba@1408: #include <map>
deba@1408: #include <memory>
deba@1408: 
deba@1408: #include <lemon/error.h>
deba@1421: #include <lemon/graph_utils.h>
deba@1421: #include <lemon/utility.h>
deba@1409: #include <lemon/bits/item_reader.h>
deba@1408: 
deba@1476: #include <lemon/concept_check.h>
deba@1476: #include <lemon/concept/maps.h>
deba@1408: 
deba@1408: namespace lemon {
deba@1408: 
deba@1421:   namespace _reader_bits {
deba@1476: 
deba@1476:     template <typename Item>
deba@1476:     class ItemIdReader {
deba@1476:     public:
deba@1476: 
deba@1476:       bool isIdReader() { return true; }
deba@1476: 
deba@1476:       Item readId(std::istream&, Item) { return Item();}
deba@1476:       
deba@1476:       template <class _ItemIdReader>
deba@1476:       struct Constraints {
deba@1476: 	void constraints() {
deba@1476: 	  bool b = reader.isIdReader();
deba@1476: 	  ignore_unused_variable_warning(b);
deba@1476: 	  Item item = reader.readId(is, Item());
deba@1476: 	}
deba@1476: 	_ItemIdReader& reader;
deba@1476: 	std::istream& is;
deba@1476:       };
deba@1476: 
deba@1476:     };
deba@1421:   
deba@1421:     template <typename T>
deba@1421:     bool operator<(T, T) {
deba@1421:       throw DataFormatError("Id is not comparable");
deba@1421:     }
deba@1421: 
deba@1421:     template <typename T>
deba@1421:     struct Less {
deba@1421:       bool operator()(const T& p, const T& q) const {
deba@1421: 	return p < q;
deba@1421:       }
deba@1421:     };
deba@1421: 
deba@1421:     template <typename M1, typename M2>
deba@1421:     class WriteComposeMap {
deba@1421:     public:
deba@1421:       typedef True NeedCopy;
deba@1421:       
deba@1421:       typedef typename M2::Key Key;
deba@1421:       typedef typename M1::Value Value;
deba@1421: 
deba@1421:       WriteComposeMap(typename SmartParameter<M1>::Type _m1, const M2& _m2) 
deba@1421: 	: m1(_m1), m2(_m2) {}
deba@1421:       
deba@1421:       void set(const Key& key, const Value& value) {
deba@1421: 	m1.set(m2[key], value);
deba@1421:       }
deba@1421: 
deba@1421:     private:
deba@1421:       
deba@1421:       typename SmartReference<M1>::Type m1;
deba@1421:       typename SmartConstReference<M2>::Type m2;
deba@1421:       
deba@1421:     };
deba@1421: 
deba@1421:     template <typename M1, typename M2>
deba@1421:     WriteComposeMap<M1, M2> writeComposeMap(M1& m1, const M2& m2) {
deba@1421:       return WriteComposeMap<M1, M2>(m1, m2);
deba@1421:     }
deba@1421: 
deba@1421:     template <typename M1, typename M2>
deba@1421:     WriteComposeMap<M1, M2> writeComposeMap(const M1& m1, const M2& m2) {
deba@1421:       return WriteComposeMap<M1, M2>(m1, m2);
deba@1421:     }
deba@1421:   
deba@1421:   }
deba@1421: 
deba@1409:   /// \ingroup io_group
deba@1408:   /// \brief Lemon Format reader class.
deba@1408:   /// 
deba@1409:   /// The Lemon Format contains several sections. We do not want to
deba@1409:   /// determine what sections are in a lemon file we give only a framework
deba@1409:   /// to read a section oriented format.
deba@1409:   ///
deba@1409:   /// In the Lemon Format each section starts with a line contains a \c \@
deba@1409:   /// character on the first not white space position. This line is the
deba@1409:   /// header line of the section. Each next lines belong to this section
deba@1409:   /// while it does not starts with \c \@ character. This line can start a 
deba@1409:   /// new section or if it can close the file with the \c \@end line.
deba@1427:   /// The file format ignore the empty and comment lines. The line is
deba@1427:   /// comment line if it starts with a \c # character. 
deba@1409:   ///
deba@1409:   /// The framework provides an abstract LemonReader::SectionReader class
deba@1409:   /// what defines the interface of a SectionReader. The SectionReader
deba@1409:   /// has the \c header() member function what get a header line string and
deba@1409:   /// decides if it want to process the next section. Several SectionReaders
deba@1409:   /// can be attached to an LemonReader and the first attached what can
deba@1409:   /// process the section will be used. Its \c read() member will called
deba@1427:   /// with a stream contains the section. From this stream the empty and
deba@1427:   /// comment lines are filtered out.
deba@1409:   ///
deba@1409:   /// \relates GraphReader
deba@1409:   /// \relates NodeSetReader
deba@1409:   /// \relates EdgeSetReader
deba@1409:   /// \relates NodesReader
deba@1409:   /// \relates EdgesReader
deba@1409:   /// \relates AttributeReader
deba@1408:   class LemonReader {
deba@1408:   private:
deba@1408:     
deba@1408:     class FilterStreamBuf : public std::streambuf {
deba@1408:     public:
deba@1408: 
deba@1408:       typedef std::streambuf Parent;
deba@1408:       typedef Parent::char_type char_type;
deba@1408:       FilterStreamBuf(std::istream& is, int& num) 
deba@1408: 	: _is(is), _base(0), _eptr(0), 
deba@1408: 	  _num(num), skip_state(after_endl) {}
deba@1408: 
deba@1408:     protected:
deba@1408: 
deba@1408:       enum skip_state_type {
deba@1408: 	no_skip,
deba@1408: 	after_endl,
deba@1427: 	comment_line
deba@1408:       };
deba@1408: 
deba@1408:       char_type small_buf[1];
deba@1408: 
deba@1408: 
deba@1408:       std::istream& _is;
deba@1408: 
deba@1408:       char_type* _base;
deba@1408:       char_type* _eptr;
deba@1408: 
deba@1408:       int& _num;
deba@1408: 
deba@1408:       skip_state_type skip_state;
deba@1408: 
deba@1408: 
deba@1408:       char_type* base() { return _base; }
deba@1408: 
deba@1408:       char_type* eptr() { return _eptr; }
deba@1408: 
deba@1408:       int blen() { return _eptr - _base; }
deba@1408: 
deba@1408:       void setb(char_type* buf, int len) {
deba@1408: 	_base = buf;
deba@1408: 	_eptr = buf + len;
deba@1408:       }
deba@1408:   
deba@1408:       virtual std::streambuf* setbuf(char *buf, int len) {
deba@1408: 	if (base()) return 0;
deba@1408: 	if (buf != 0 && len >= (int)sizeof(small_buf)) {
deba@1408: 	  setb(buf, len);
deba@1408: 	} else {
deba@1408: 	  setb(small_buf, sizeof(small_buf));
deba@1408: 	}
deba@1408: 	setg(0, 0, 0);
deba@1408: 	return this;
deba@1408:       }
deba@1408: 
deba@1408:       bool put_char(char c) {
deba@1408: 	switch (skip_state) {
deba@1408: 	case no_skip:
deba@1408: 	  switch (c) {
deba@1408: 	  case '\n': 
deba@1408: 	    skip_state = after_endl;
deba@1408: 	    return true;
deba@1408: 	  default:
deba@1408: 	    return true;
deba@1408: 	  }
deba@1408: 	case after_endl:
deba@1408: 	  switch (c) {
deba@1408: 	  case '@':
deba@1408: 	    return false;
deba@1408: 	  case '\n': 
deba@1408: 	    return false;
deba@1408: 	  case '#':
deba@1427: 	    skip_state = comment_line;
deba@1408: 	    return false;
deba@1408: 	  default:
deba@1408: 	    if (!isspace(c)) {
deba@1408: 	      skip_state = no_skip;
deba@1408: 	      return true;
deba@1408: 	    } else {
deba@1408: 	      return false;
deba@1408: 	    }
deba@1408: 	  }
deba@1408: 	  break;
deba@1427: 	case comment_line:
deba@1408: 	  switch (c) {
deba@1408: 	  case '\n': 
deba@1408: 	    skip_state = after_endl;
deba@1408: 	    return false;
deba@1408: 	  default:
deba@1408: 	    return false;
deba@1408: 	  }
deba@1408: 	}
deba@1408: 	return false;
deba@1408:       }
deba@1408: 
deba@1408:       virtual int underflow() {
deba@1408: 	char c;
deba@1408: 	if (_is.read(&c, 1)) {
deba@1408: 	  _is.putback(c);
deba@1408: 	  if (c == '@') {
deba@1408: 	    return EOF;
deba@1408: 	  }
deba@1408: 	} else {
deba@1408: 	  return EOF;
deba@1408: 	}
deba@1408: 	char_type *ptr;
deba@1408: 	for (ptr = base(); ptr != eptr(); ++ptr) {
deba@1408: 	  if (_is.read(&c, 1)) {
deba@1408: 	    if (c == '\n') ++_num;
deba@1408: 	    if (put_char(c)) {
deba@1408: 	      *ptr = c;
deba@1408: 	    } else {
deba@1408: 	      if (skip_state == after_endl && c == '@') {
deba@1408: 		_is.putback('@');
deba@1408: 		break;
deba@1408: 	      }
deba@1408: 	      --ptr;
deba@1408: 	    }
deba@1408: 	  } else {
deba@1408: 	    break;
deba@1408: 	  }
deba@1408: 	}
deba@1408: 	setg(base(), base(), ptr);
deba@1408: 	return *base();
deba@1408:       }
deba@1408: 
deba@1408:       virtual int sync() {
deba@1408: 	return EOF;
deba@1408:       }
deba@1408:     };
deba@1408: 
deba@1408:   public:
deba@1408: 
deba@1409:     /// \brief Abstract base class for reading a section.
deba@1409:     ///
deba@1409:     /// This class has an \c header() member function what get a 
deba@1409:     /// header line string and decides if it want to process the next 
deba@1409:     /// section. Several SectionReaders can be attached to an LemonReader 
deba@1409:     /// and the first attached what can process the section will be used. 
deba@1409:     /// Its \c read() member will called with a stream contains the section. 
deba@1409:     /// From this stream the empty lines and comments are filtered out.
deba@1408:     class SectionReader {
deba@1409:       friend class LemonReader;
deba@1409:     protected:
deba@1409:       /// \brief Constructor for SectionReader.
deba@1409:       ///
deba@1409:       /// Constructor for SectionReader. It attach this reader to
deba@1409:       /// the given LemonReader.
deba@1409:       SectionReader(LemonReader& reader) {
deba@1409: 	reader.attach(*this);
deba@1409:       }
deba@1409: 
deba@1409:       /// \brief Gives back true when the SectionReader can process 
deba@1409:       /// the section with the given header line.
deba@1409:       ///
deba@1409:       /// It gives back true when the SectionReader can process
deba@1409:       /// the section with the given header line.
deba@1408:       virtual bool header(const std::string& line) = 0;
deba@1409: 
deba@1409:       /// \brief Reader function of the section.
deba@1409:       ///
deba@1409:       /// It reads the content of the section.
deba@1408:       virtual void read(std::istream& is) = 0;
deba@1408:     };
deba@1408: 
deba@1409:     /// \brief Constructor for LemonReader.
deba@1409:     ///
deba@1409:     /// Constructor for LemonReader which reads from the given stream.
deba@1408:     LemonReader(std::istream& _is) 
deba@1408:       : is(&_is), own_is(false) {}
deba@1408: 
deba@1409:     /// \brief Constructor for LemonReader.
deba@1409:     ///
deba@1409:     /// Constructor for LemonReader which reads from the given file.
deba@1408:     LemonReader(const std::string& filename) 
deba@1408:       : is(0), own_is(true) {
deba@1408:       is = new std::ifstream(filename.c_str());
deba@1408:     }
deba@1408: 
deba@1409:     /// \brief Desctructor for LemonReader.
deba@1409:     ///
deba@1409:     /// Desctructor for LemonReader.
deba@1408:     ~LemonReader() {
deba@1408:       if (own_is) {
deba@1408: 	delete is;
deba@1408:       }
deba@1408:     }
deba@1408: 
deba@1408:   private:
deba@1408:     LemonReader(const LemonReader&);
deba@1408:     void operator=(const LemonReader&);
deba@1408: 
deba@1408:     void attach(SectionReader& reader) {
deba@1408:       readers.push_back(&reader);
deba@1408:     }
deba@1408: 
deba@1409:   public:
deba@1409:     /// \brief Executes the LemonReader.
deba@1409:     /// 
deba@1409:     /// It executes the LemonReader.
deba@1408:     void run() {
deba@1408:       int line_num = 0;
deba@1408:       std::string line;
deba@1408:       try {
deba@1408: 	while ((++line_num, getline(*is, line)) && line.find("@end") != 0) {
deba@1408: 	  SectionReaders::iterator it;
deba@1408: 	  for (it = readers.begin(); it != readers.end(); ++it) {
deba@1408: 	    if ((*it)->header(line)) {
deba@1408: 	      char buf[2048];
deba@1408: 	      FilterStreamBuf buffer(*is, line_num);
deba@1408: 	      buffer.pubsetbuf(buf, sizeof(buf));
deba@1408: 	      std::istream is(&buffer);
deba@1408: 	      (*it)->read(is);
deba@1408: 	      break;
deba@1408: 	    }
deba@1408: 	  }
deba@1408: 	}
deba@1408:       } catch (DataFormatError& error) {
deba@1408: 	error.line(line_num);
deba@1408: 	throw error;
deba@1408:       }	
deba@1408:     }
deba@1408: 
deba@1408: 
deba@1408:   private:
deba@1408: 
deba@1408:     std::istream* is;
deba@1408:     bool own_is;
deba@1408: 
deba@1408:     typedef std::vector<SectionReader*> SectionReaders;
deba@1408:     SectionReaders readers;
deba@1408: 
deba@1408:   };
deba@1408: 
deba@1409:   /// \brief Helper class for implementing the common SectionReaders.
deba@1409:   ///
deba@1409:   /// Helper class for implementing the common SectionReaders.
deba@1409:   class CommonSectionReaderBase : public LemonReader::SectionReader {
deba@1409:     typedef LemonReader::SectionReader Parent;
deba@1409:   protected:
deba@1409:     
deba@1409:     /// \brief Constructor for CommonSectionReaderBase.
deba@1409:     ///
deba@1409:     /// Constructor for CommonSectionReaderBase. It attach this reader to
deba@1409:     /// the given LemonReader.
deba@1409:     CommonSectionReaderBase(LemonReader& _reader) 
deba@1409:       : Parent(_reader) {}
deba@1408: 
deba@1408:     template <typename _Item>
deba@1408:     class ReaderBase;
deba@1408:     
deba@1408:     template <typename _Item>
deba@1408:     class InverterBase : public ReaderBase<_Item> {
deba@1408:     public:
deba@1408:       typedef _Item Item;
deba@1408:       virtual void read(std::istream&, const Item&) = 0;
deba@1408:       virtual Item read(std::istream&) const = 0;
deba@1408: 
deba@1408:       virtual InverterBase<_Item>* getInverter() {
deba@1408: 	return this;
deba@1408:       }
deba@1408:     };
deba@1408: 
deba@1408:     template <typename _Item, typename _Map, typename _Reader>
deba@1408:     class MapReaderInverter : public InverterBase<_Item> {
deba@1408:     public:
deba@1408:       typedef _Item Item;
deba@1408:       typedef _Reader Reader;
deba@1408:       typedef typename Reader::Value Value;
deba@1408:       typedef _Map Map;
deba@1424:       typedef std::map<Value, Item, _reader_bits::Less<Value> > Inverse;
deba@1408: 
deba@1421:       typename SmartReference<Map>::Type map;
deba@1408:       Reader reader;
deba@1408:       Inverse inverse;
deba@1408: 
deba@1421:       MapReaderInverter(typename SmartParameter<Map>::Type _map,
deba@1421: 			const Reader& _reader) 
deba@1408: 	: map(_map), reader(_reader) {}
deba@1408: 
deba@1408:       virtual ~MapReaderInverter() {}
deba@1408: 
deba@1408:       virtual void read(std::istream& is, const Item& item) {
deba@1408: 	Value value;
deba@1408: 	reader.read(is, value);
deba@1408: 	map.set(item, value);
deba@1408: 	typename Inverse::iterator it = inverse.find(value);
deba@1408: 	if (it == inverse.end()) {
deba@1408: 	  inverse.insert(std::make_pair(value, item));
deba@1408: 	} else {
deba@1408: 	  throw DataFormatError("Multiple ID occurence");
deba@1408: 	}
deba@1408:       }
deba@1408: 
deba@1408:       virtual Item read(std::istream& is) const {
deba@1408: 	Value value;
deba@1408: 	reader.read(is, value);	
deba@1408: 	typename Inverse::const_iterator it = inverse.find(value);
deba@1408: 	if (it != inverse.end()) {
deba@1408: 	  return it->second;
deba@1408: 	} else {
deba@1408: 	  throw DataFormatError("Invalid ID error");
deba@1408: 	}
deba@1408:       }      
deba@1408:     };
deba@1408: 
deba@1408:     template <typename _Item, typename _Reader>
deba@1408:     class SkipReaderInverter : public InverterBase<_Item> {
deba@1408:     public:
deba@1408:       typedef _Item Item;
deba@1408:       typedef _Reader Reader;
deba@1408:       typedef typename Reader::Value Value;
deba@1424:       typedef std::map<Value, Item, _reader_bits::Less<Value> > Inverse;
deba@1408: 
deba@1408:       Reader reader;
deba@1408: 
deba@1408:       SkipReaderInverter(const Reader& _reader) 
deba@1408: 	: reader(_reader) {}
deba@1408: 
deba@1408:       virtual ~SkipReaderInverter() {}
deba@1408: 
deba@1408:       virtual void read(std::istream& is, const Item& item) {
deba@1408: 	Value value;
deba@1408: 	reader.read(is, value);
deba@1408: 	typename Inverse::iterator it = inverse.find(value);
deba@1408: 	if (it == inverse.end()) {
deba@1408: 	  inverse.insert(std::make_pair(value, item));
deba@1408: 	} else {
deba@1408: 	  throw DataFormatError("Multiple ID occurence error");
deba@1408: 	}
deba@1408:       }
deba@1408: 
deba@1408:       virtual Item read(std::istream& is) const {
deba@1408: 	Value value;
deba@1408: 	reader.read(is, value);	
deba@1408: 	typename Inverse::const_iterator it = inverse.find(value);
deba@1408: 	if (it != inverse.end()) {
deba@1408: 	  return it->second;
deba@1408: 	} else {
deba@1408: 	  throw DataFormatError("Invalid ID error");
deba@1408: 	}
deba@1408:       }
deba@1408: 
deba@1408:     private:
deba@1408:       Inverse inverse;
deba@1408:     };
deba@1408: 
deba@1408:     template <typename _Item>    
deba@1408:     class ReaderBase {
deba@1408:     public:
deba@1408:       typedef _Item Item;
deba@1408: 
deba@1408:       virtual ~ReaderBase() {}
deba@1408: 
deba@1408:       virtual void read(std::istream& is, const Item& item) = 0;
deba@1408:       virtual InverterBase<_Item>* getInverter() = 0;
deba@1408:     };
deba@1408: 
deba@1408:     template <typename _Item, typename _Map, typename _Reader>
deba@1408:     class MapReader : public ReaderBase<_Item> {
deba@1408:     public:
deba@1408:       typedef _Map Map;
deba@1408:       typedef _Reader Reader;
deba@1408:       typedef typename Reader::Value Value;
deba@1408:       typedef _Item Item;
deba@1408:       
deba@1421:       typename SmartReference<Map>::Type map;
deba@1408:       Reader reader;
deba@1408: 
deba@1421:       MapReader(typename SmartParameter<Map>::Type _map, 
deba@1421: 		const Reader& _reader) 
deba@1408: 	: map(_map), reader(_reader) {}
deba@1408: 
deba@1408:       virtual ~MapReader() {}
deba@1408: 
deba@1408:       virtual void read(std::istream& is, const Item& item) {
deba@1408: 	Value value;
deba@1408: 	reader.read(is, value);
deba@1408: 	map.set(item, value);
deba@1408:       }
deba@1408: 
deba@1408:       virtual InverterBase<_Item>* getInverter() {
deba@1408: 	return new MapReaderInverter<Item, Map, Reader>(map, reader);
deba@1408:       }
deba@1408:     };
deba@1408: 
deba@1408: 
deba@1408:     template <typename _Item, typename _Reader>
deba@1408:     class SkipReader : public ReaderBase<_Item> {
deba@1408:     public:
deba@1408:       typedef _Reader Reader;
deba@1408:       typedef typename Reader::Value Value;
deba@1408:       typedef _Item Item;
deba@1408: 
deba@1408:       Reader reader;
deba@1408:       SkipReader(const Reader& _reader) : reader(_reader) {}
deba@1408: 
deba@1408:       virtual ~SkipReader() {}
deba@1408: 
deba@1408:       virtual void read(std::istream& is, const Item&) {
deba@1408: 	Value value;
deba@1408: 	reader.read(is, value);
deba@1408:       }      
deba@1408: 
deba@1408:       virtual InverterBase<Item>* getInverter() {
deba@1408: 	return new SkipReaderInverter<Item, Reader>(reader);
deba@1408:       }
deba@1408:     };
deba@1408: 
deba@1408:     template <typename _Item>
deba@1409:     class IdReaderBase {
deba@1408:     public:
deba@1408:       typedef _Item Item;
deba@1409:       virtual Item read(std::istream& is) const = 0;
deba@1476:       virtual bool isIdReader() const = 0;
deba@1408:     };
deba@1408: 
deba@1409:     template <typename _Item, typename _BoxedIdReader>
deba@1409:     class IdReader : public IdReaderBase<_Item> {
deba@1408:     public:
deba@1408:       typedef _Item Item;
deba@1409:       typedef _BoxedIdReader BoxedIdReader;
deba@1409:       
deba@1409:       const BoxedIdReader& boxedIdReader;
deba@1408: 
deba@1409:       IdReader(const BoxedIdReader& _boxedIdReader) 
deba@1409: 	: boxedIdReader(_boxedIdReader) {}
deba@1408: 
deba@1409:       virtual Item read(std::istream& is) const {
deba@1429: 	return boxedIdReader.readId(is, Item());
deba@1408:       }
deba@1476: 
deba@1476:       virtual bool isIdReader() const {
deba@1476: 	return boxedIdReader.isIdReader();
deba@1476:       }
deba@1408:     };
deba@1408: 
deba@1408:     class ValueReaderBase {
deba@1408:     public:
deba@1408:       virtual void read(std::istream&) {};
deba@1408:     };
deba@1408: 
deba@1408:     template <typename _Value, typename _Reader>
deba@1408:     class ValueReader : public ValueReaderBase {
deba@1408:     public:
deba@1408:       typedef _Value Value;
deba@1408:       typedef _Reader Reader;
deba@1408: 
deba@1408:       ValueReader(Value& _value, const Reader& _reader)
deba@1408:  	: value(_value), reader(_reader) {}
deba@1408: 
deba@1408:       virtual void read(std::istream& is) {
deba@1408: 	reader.read(is, value);
deba@1408:       }
deba@1408:     private:
deba@1408:       Value& value;
deba@1408:       Reader reader;
deba@1408:     };
deba@1408:     
deba@1408:   };
deba@1408: 
deba@1409:   /// \ingroup io_group
deba@1409:   /// \brief SectionReader for reading a graph's nodeset.
deba@1409:   ///
deba@1409:   /// The lemon format can store multiple graph nodesets with several maps.
deba@1409:   /// The nodeset section's header line is \c \@nodeset \c nodeset_id, but the
deba@1409:   /// \c nodeset_id may be empty.
deba@1409:   ///
deba@1409:   /// The first line of the section contains the names of the maps separated
deba@1409:   /// with white spaces. Each next lines describes a node in the nodeset, and
deba@1409:   /// contains the mapped values for each map.
deba@1409:   ///
deba@1409:   /// If the nodeset contains an \c "id" named map then it will be regarded
deba@1409:   /// as id map. This map should contain only unique values and when the 
deba@1409:   /// \c readId() member will read a value from the given stream it will
deba@1409:   /// give back that node which is mapped to this value.
deba@1409:   ///
deba@1409:   /// \relates LemonReader
deba@1408:   template <typename _Graph, typename _Traits = DefaultReaderTraits>
deba@1408:   class NodeSetReader : public CommonSectionReaderBase {
deba@1408:     typedef CommonSectionReaderBase Parent;
deba@1408:   public:
deba@1408: 
deba@1408:     typedef _Graph Graph;
deba@1408:     typedef _Traits Traits;
deba@1429:     typedef typename Graph::Node Node;
deba@1408:     typedef typename Traits::Skipper DefaultSkipper;
deba@1408: 
deba@1409:     /// \brief Constructor.
deba@1409:     ///
deba@1409:     /// Constructor for NodeSetReader. It creates the NodeSetReader and
deba@1409:     /// attach it into the given LemonReader. The nodeset reader will
deba@1409:     /// add the readed nodes to the given Graph. The reader will read
deba@1409:     /// the section when the \c section_id and the \c _id are the same. 
deba@1421:     NodeSetReader(LemonReader& _reader, 
deba@1421: 		  typename SmartParameter<Graph>::Type _graph, 
deba@1408: 		  const std::string& _id = std::string(),
deba@1409: 		  const DefaultSkipper& _skipper = DefaultSkipper()) 
deba@1409:       : Parent(_reader), graph(_graph), id(_id), skipper(_skipper) {} 
deba@1408: 
deba@1409: 
deba@1409:     /// \brief Destructor.
deba@1409:     ///
deba@1409:     /// Destructor for NodeSetReader.
deba@1408:     virtual ~NodeSetReader() {
deba@1408:       for (typename MapReaders::iterator it = readers.begin(); 
deba@1408: 	   it != readers.end(); ++it) {
deba@1408: 	delete it->second;
deba@1408:       }
deba@1408:     }
deba@1408: 
deba@1408:   private:
deba@1408:     NodeSetReader(const NodeSetReader&);
deba@1408:     void operator=(const NodeSetReader&);
deba@1408:   
deba@1408:   public:
deba@1408: 
deba@1408:     /// \brief Add a new node map reader command for the reader.
deba@1408:     ///
deba@1408:     /// Add a new node map reader command for the reader.
deba@1408:     template <typename Map>
deba@1421:     NodeSetReader& readNodeMap(std::string name, Map& map) {
deba@1421:       return _readMap<
deba@1421: 	typename Traits::template Reader<typename Map::Value>, Map,
deba@1421: 	typename SmartParameter<Map>::Type>(name, map);
deba@1421:     }
deba@1421: 
deba@1421:     template <typename Map>
deba@1421:     NodeSetReader& readNodeMap(std::string name, const Map& map) {
deba@1421:       return _readMap<
deba@1421: 	typename Traits::template Reader<typename Map::Value>, Map,
deba@1421: 	typename SmartParameter<Map>::Type>(name, map);
deba@1408:     }
deba@1408: 
deba@1408:     /// \brief Add a new node map reader command for the reader.
deba@1408:     ///
deba@1408:     /// Add a new node map reader command for the reader.
deba@1408:     template <typename Reader, typename Map>
deba@1421:     NodeSetReader& readNodeMap(std::string name, Map& map, 
deba@1421: 			       const Reader& reader = Reader()) {
deba@1429:       return _readMap<Reader, Map, typename SmartParameter<Map>::Type>
deba@1429: 	(name, map, reader);
deba@1421:     }
deba@1421: 
deba@1421:     template <typename Reader, typename Map>
deba@1421:     NodeSetReader& readNodeMap(std::string name, const Map& map, 
deba@1421: 			       const Reader& reader = Reader()) {
deba@1429:       return _readMap<Reader, Map, typename SmartParameter<Map>::Type>
deba@1429: 	(name, map, reader);
deba@1421:     }
deba@1421: 
deba@1421:   private:
deba@1421: 
deba@1421:     template <typename Reader, typename Map, typename MapParameter>
deba@1421:     NodeSetReader& _readMap(std::string name, MapParameter map, 
deba@1421: 			    const Reader& reader = Reader()) {
deba@1408:       if (readers.find(name) != readers.end()) {
deba@1408: 	ErrorMessage msg;
deba@1408: 	msg << "Multiple read rule for node map: " << name;
deba@1408: 	throw IOParameterError(msg.message());
deba@1408:       }
deba@1408:       readers.insert(
deba@1429: 	make_pair(name, new MapReader<Node, Map, Reader>(map, reader)));
deba@1408:       return *this;
deba@1408:     }
deba@1408: 
deba@1421:   public:
deba@1421: 
deba@1408:     /// \brief Add a new node map skipper command for the reader.
deba@1408:     ///
deba@1408:     /// Add a new node map skipper command for the reader.
deba@1408:     template <typename Reader>
deba@1421:     NodeSetReader& skipNodeMap(std::string name, 
deba@1408: 			   const Reader& reader = Reader()) {
deba@1408:       if (readers.find(name) != readers.end()) {
deba@1408: 	ErrorMessage msg;
deba@1408: 	msg << "Multiple read rule for node map: " << name;
deba@1408: 	throw IOParameterError(msg.message());
deba@1408:       }
deba@1429:       readers.insert(make_pair(name, new SkipReader<Node, Reader>(reader)));
deba@1408:       return *this;
deba@1408:     }
deba@1408: 
deba@1409:   protected:
deba@1409: 
deba@1409:     /// \brief Gives back true when the SectionReader can process 
deba@1409:     /// the section with the given header line.
deba@1409:     ///
deba@1421:     /// It gives back true when the header line starts with \c \@nodeset,
deba@1409:     /// and the header line's id and the nodeset's id are the same.
deba@1408:     virtual bool header(const std::string& line) {
deba@1408:       std::istringstream ls(line);
deba@1408:       std::string command;
deba@1408:       std::string name;
deba@1408:       ls >> command >> name;
deba@1408:       return command == "@nodeset" && name == id;
deba@1408:     }
deba@1408: 
deba@1409:     /// \brief Reader function of the section.
deba@1409:     ///
deba@1409:     /// It reads the content of the section.
deba@1408:     virtual void read(std::istream& is) {
deba@1429:       std::vector<ReaderBase<Node>* > index;
deba@1408:       std::string line;
deba@1408: 
deba@1408:       getline(is, line);
deba@1408:       std::istringstream ls(line);	
deba@1408:       while (ls >> id) {
deba@1408: 	typename MapReaders::iterator it = readers.find(id);
deba@1408: 	if (it != readers.end()) {
deba@1408: 	  index.push_back(it->second);
deba@1408: 	} else {
deba@1408: 	  index.push_back(&skipper);
deba@1408: 	}
deba@1408: 	if (id == "id" && inverter.get() == 0) {
deba@1408: 	  inverter.reset(index.back()->getInverter());
deba@1408: 	  index.back() = inverter.get();
deba@1408: 	}
deba@1408:       }
deba@1408:       while (getline(is, line)) {	
deba@1429: 	Node node = graph.addNode();
deba@1408: 	std::istringstream ls(line);
deba@1408: 	for (int i = 0; i < (int)index.size(); ++i) {
deba@1408: 	  index[i]->read(ls, node);
deba@1408: 	}
deba@1408:       }
deba@1408:     }
deba@1408: 
deba@1409:   public:
deba@1409: 
deba@1409:     /// \brief Returns true if the nodeset can give back the node by its id.
deba@1409:     ///
deba@1409:     /// Returns true if the nodeset can give back the node by its id.
deba@1409:     /// It is possible only if an "id" named map was read.
deba@1409:     bool isIdReader() const {
deba@1408:       return inverter.get() != 0;
deba@1408:     }
deba@1408: 
deba@1409:     /// \brief Gives back the node by its id.
deba@1409:     ///
deba@1409:     /// It reads an id from the stream and gives back which node belongs to
deba@1409:     /// it. It is possible only if there was read an "id" named map.
deba@1429:     Node readId(std::istream& is, Node = Node()) const {
deba@1408:       return inverter->read(is);
deba@1408:     } 
deba@1408: 
deba@1408:   private:
deba@1408: 
deba@1429:     typedef std::map<std::string, ReaderBase<Node>*> MapReaders;
deba@1408:     MapReaders readers;
deba@1408:    
deba@1421:     typename SmartReference<Graph>::Type graph;   
deba@1408:     std::string id;
deba@1429:     SkipReader<Node, DefaultSkipper> skipper;
deba@1408: 
deba@1429:     std::auto_ptr<InverterBase<Node> > inverter;
deba@1408:   };
deba@1408: 
deba@1409:   /// \ingroup io_group
deba@1409:   /// \brief SectionReader for reading a graph's edgeset.
deba@1409:   ///
deba@1409:   /// The lemon format can store multiple graph edgesets with several maps.
deba@1409:   /// The edgeset section's header line is \c \@edgeset \c edgeset_id, but the
deba@1409:   /// \c edgeset_id may be empty.
deba@1409:   ///
deba@1409:   /// The first line of the section contains the names of the maps separated
deba@1421:   /// with white spaces. Each next lines describes an edge in the edgeset. The
deba@1421:   /// line contains the source and the target nodes' id and the mapped 
deba@1421:   /// values for each map.
deba@1409:   ///
deba@1409:   /// If the edgeset contains an \c "id" named map then it will be regarded
deba@1409:   /// as id map. This map should contain only unique values and when the 
deba@1409:   /// \c readId() member will read a value from the given stream it will
deba@1409:   /// give back that edge which is mapped to this value.
deba@1409:   ///
deba@1409:   /// The edgeset reader needs a node id reader to identify which nodes
deba@1409:   /// have to be connected. If a NodeSetReader reads an "id" named map,
deba@1409:   /// it will be able to resolve the nodes by ids.
deba@1409:   ///
deba@1409:   /// \relates LemonReader
deba@1408:   template <typename _Graph, typename _Traits = DefaultReaderTraits>
deba@1408:   class EdgeSetReader : public CommonSectionReaderBase {
deba@1408:     typedef CommonSectionReaderBase Parent;
deba@1408:   public:
deba@1408: 
deba@1408:     typedef _Graph Graph;
deba@1408:     typedef _Traits Traits;
deba@1429:     typedef typename Graph::Node Node;
deba@1429:     typedef typename Graph::Edge Edge;
deba@1408:     typedef typename Traits::Skipper DefaultSkipper;
deba@1408: 
deba@1409:     /// \brief Constructor.
deba@1409:     ///
deba@1409:     /// Constructor for EdgeSetReader. It creates the EdgeSetReader and
deba@1409:     /// attach it into the given LemonReader. The edgeset reader will
deba@1409:     /// add the readed edges to the given Graph. It will use the given
deba@1409:     /// node id reader to read the source and target nodes of the edges.
deba@1409:     /// The reader will read the section only if the \c _id and the 
deba@1409:     /// \c edgset_id are the same. 
deba@1409:     template <typename NodeIdReader>
deba@1421:     EdgeSetReader(LemonReader& _reader, 
deba@1421: 		  typename SmartParameter<Graph>::Type _graph, 
deba@1409: 		  const NodeIdReader& _nodeIdReader, 
deba@1408: 		  const std::string& _id = std::string(),
deba@1409: 		  const DefaultSkipper& _skipper = DefaultSkipper()) 
deba@1476:       : Parent(_reader), graph(_graph), id(_id), skipper(_skipper) {
deba@1476:       checkConcept<_reader_bits::ItemIdReader<Node>, NodeIdReader>();
deba@1476:       nodeIdReader.reset(new IdReader<Node, NodeIdReader>(_nodeIdReader));
deba@1476:     }
deba@1409:     /// \brief Destructor.
deba@1409:     ///
deba@1409:     /// Destructor for EdgeSetReader.
deba@1408:     virtual ~EdgeSetReader() {
deba@1408:       for (typename MapReaders::iterator it = readers.begin(); 
deba@1408: 	   it != readers.end(); ++it) {
deba@1408: 	delete it->second;
deba@1408:       }
deba@1408:     }
deba@1408: 
deba@1408:   private:
deba@1408:     EdgeSetReader(const EdgeSetReader&);
deba@1408:     void operator=(const EdgeSetReader&);
deba@1408: 
deba@1408:   public:
deba@1408: 
deba@1409:     /// \brief Add a new edge map reader command for the reader.
deba@1408:     ///
deba@1409:     /// Add a new edge map reader command for the reader.
deba@1408:     template <typename Map>
deba@1421:     EdgeSetReader& readEdgeMap(std::string name, Map& map) {
deba@1421:       return _readMap<
deba@1421: 	typename Traits::template Reader<typename Map::Value>, Map,
deba@1421: 	typename SmartParameter<Map>::Type>(name, map);
deba@1421:     }
deba@1421: 
deba@1421:     template <typename Map>
deba@1421:     EdgeSetReader& readEdgeMap(std::string name, const Map& map) {
deba@1421:       return _readMap<
deba@1421: 	typename Traits::template Reader<typename Map::Value>, Map,
deba@1421: 	typename SmartParameter<Map>::Type>(name, map);
deba@1408:     }
deba@1408: 
deba@1409:     /// \brief Add a new edge map reader command for the reader.
deba@1408:     ///
deba@1409:     /// Add a new edge map reader command for the reader.
deba@1408:     template <typename Reader, typename Map>
deba@1421:     EdgeSetReader& readEdgeMap(std::string name, Map& map, 
deba@1421: 			   const Reader& reader = Reader()) {
deba@1429:       return _readMap<Reader, Map,
deba@1421: 	typename SmartParameter<Map>::Type>(name, map, reader);
deba@1421:     }
deba@1421: 
deba@1421:     template <typename Reader, typename Map>
deba@1421:     EdgeSetReader& readEdgeMap(std::string name, const Map& map, 
deba@1421: 			       const Reader& reader = Reader()) {
deba@1429:       return _readMap<Reader, Map,
deba@1421: 	typename SmartParameter<Map>::Type>(name, map, reader);
deba@1421:     }
deba@1421: 
deba@1421:   private:
deba@1421: 
deba@1421:     template <typename Reader, typename Map, typename MapParameter>
deba@1421:     EdgeSetReader& _readMap(std::string name, MapParameter map, 
deba@1421: 			    const Reader& reader = Reader()) {
deba@1408:       if (readers.find(name) != readers.end()) {
deba@1408: 	ErrorMessage msg;
deba@1408: 	msg << "Multiple read rule for edge map: " << name;
deba@1408: 	throw IOParameterError(msg.message());
deba@1408:       }
deba@1408:       readers.insert(
deba@1429: 	make_pair(name, new MapReader<Edge, Map, Reader>(map, reader)));
deba@1408:       return *this;
deba@1408:     }
deba@1408: 
deba@1421:   public:
deba@1421: 
deba@1409:     /// \brief Add a new edge map skipper command for the reader.
deba@1408:     ///
deba@1409:     /// Add a new edge map skipper command for the reader.
deba@1408:     template <typename Reader>
deba@1421:     EdgeSetReader& skipEdgeMap(std::string name, 
deba@1421: 			       const Reader& reader = Reader()) {
deba@1408:       if (readers.find(name) != readers.end()) {
deba@1408: 	ErrorMessage msg;
deba@1421: 	msg << "Multiple read rule for edge map: " << name;
deba@1408: 	throw IOParameterError(msg.message());
deba@1408:       }
deba@1429:       readers.insert(make_pair(name, new SkipReader<Edge, Reader>(reader)));
deba@1408:       return *this;
deba@1408:     }
deba@1408: 
deba@1409:   protected:
deba@1409: 
deba@1409:     /// \brief Gives back true when the SectionReader can process 
deba@1409:     /// the section with the given header line.
deba@1409:     ///
deba@1421:     /// It gives back true when the header line starts with \c \@edgeset,
deba@1409:     /// and the header line's id and the edgeset's id are the same.
deba@1408:     virtual bool header(const std::string& line) {
deba@1408:       std::istringstream ls(line);
deba@1408:       std::string command;
deba@1408:       std::string name;
deba@1408:       ls >> command >> name;
deba@1408:       return command == "@edgeset" && name == id;
deba@1408:     }
deba@1408: 
deba@1409:     /// \brief Reader function of the section.
deba@1409:     ///
deba@1409:     /// It reads the content of the section.
deba@1408:     virtual void read(std::istream& is) {
deba@1476:       if (!nodeIdReader->isIdReader()) {
deba@1476: 	throw DataFormatError("Cannot find nodeset or ID map");
deba@1476:       }
deba@1429:       std::vector<ReaderBase<Edge>* > index;
deba@1408:       std::string line;
deba@1408: 
deba@1408:       getline(is, line);
deba@1408:       std::istringstream ls(line);	
deba@1408:       while (ls >> id) {
deba@1408: 	typename MapReaders::iterator it = readers.find(id);
deba@1408: 	if (it != readers.end()) {
deba@1408: 	  index.push_back(it->second);
deba@1408: 	} else {
deba@1408: 	  index.push_back(&skipper);
deba@1408: 	}
deba@1408: 	if (id == "id" && inverter.get() == 0) {
deba@1408: 	  inverter.reset(index.back()->getInverter());
deba@1408: 	  index.back() = inverter.get();
deba@1408: 	}
deba@1408:       }
deba@1408:       while (getline(is, line)) {	
deba@1408: 	std::istringstream ls(line);
deba@1429: 	Node from = nodeIdReader->read(ls);
deba@1429: 	Node to = nodeIdReader->read(ls);
deba@1429: 	Edge edge = graph.addEdge(from, to);
deba@1408: 	for (int i = 0; i < (int)index.size(); ++i) {
deba@1408: 	  index[i]->read(ls, edge);
deba@1408: 	}
deba@1408:       }
deba@1408:     }
deba@1408: 
deba@1409:   public:
deba@1409: 
deba@1409:     /// \brief Returns true if the edgeset can give back the edge by its id.
deba@1409:     ///
deba@1409:     /// Returns true if the edgeset can give back the edge by its id.
deba@1409:     /// It is possible only if an "id" named map was read.
deba@1409:     bool isIdReader() const {
deba@1408:       return inverter.get() != 0;
deba@1408:     }
deba@1408: 
deba@1409:     /// \brief Gives back the edge by its id.
deba@1409:     ///
deba@1409:     /// It reads an id from the stream and gives back which edge belongs to
deba@1409:     /// it. It is possible only if there was read an "id" named map.
deba@1429:     Edge readId(std::istream& is, Edge = Edge()) const {
deba@1408:       return inverter->read(is);
deba@1408:     } 
deba@1408: 
deba@1408:   private:
deba@1408: 
deba@1429:     typedef std::map<std::string, ReaderBase<Edge>*> MapReaders;
deba@1408:     MapReaders readers;
deba@1408:    
deba@1421:     typename SmartReference<Graph>::Type graph;   
deba@1421:     std::string id;
deba@1429:     SkipReader<Edge, DefaultSkipper> skipper;
deba@1421: 
deba@1429:     std::auto_ptr<InverterBase<Edge> > inverter;
deba@1429:     std::auto_ptr<IdReaderBase<Node> > nodeIdReader;
deba@1421:   };
deba@1421: 
deba@1421:   /// \ingroup io_group
deba@1421:   /// \brief SectionReader for reading a undirected graph's edgeset.
deba@1421:   ///
deba@1421:   /// The lemon format can store multiple undirected edgesets with several 
deba@1421:   /// maps. The undirected edgeset section's header line is \c \@undiredgeset 
deba@1421:   /// \c undiredgeset_id, but the \c undiredgeset_id may be empty.
deba@1421:   ///
deba@1421:   /// The first line of the section contains the names of the maps separated
deba@1421:   /// with white spaces. Each next lines describes an edge in the edgeset. The
deba@1421:   /// line contains the connected nodes' id and the mapped values for each map.
deba@1421:   ///
deba@1421:   /// The section can handle the directed as a syntactical sugar. Two
deba@1421:   /// undirected edge map describes one directed edge map. This two maps
deba@1421:   /// are the forward map and the backward map and the names of this map
deba@1421:   /// is near the same just with a prefix \c '+' or \c '-' character 
deba@1421:   /// difference.
deba@1421:   ///
deba@1421:   /// If the edgeset contains an \c "id" named map then it will be regarded
deba@1421:   /// as id map. This map should contain only unique values and when the 
deba@1421:   /// \c readId() member will read a value from the given stream it will
deba@1421:   /// give back that undiricted edge which is mapped to this value.
deba@1421:   ///
deba@1421:   /// The undirected edgeset reader needs a node id reader to identify which 
deba@1421:   /// nodes have to be connected. If a NodeSetReader reads an "id" named map,
deba@1421:   /// it will be able to resolve the nodes by ids.
deba@1421:   ///
deba@1421:   /// \relates LemonReader
deba@1421:   template <typename _Graph, typename _Traits = DefaultReaderTraits>
deba@1421:   class UndirEdgeSetReader : public CommonSectionReaderBase {
deba@1421:     typedef CommonSectionReaderBase Parent;
deba@1421:   public:
deba@1421: 
deba@1421:     typedef _Graph Graph;
deba@1421:     typedef _Traits Traits;
deba@1429:     typedef typename Graph::Node Node;
deba@1429:     typedef typename Graph::Edge Edge;
deba@1429:     typedef typename Graph::UndirEdge UndirEdge;
deba@1421:     typedef typename Traits::Skipper DefaultSkipper;
deba@1421: 
deba@1421:     /// \brief Constructor.
deba@1421:     ///
deba@1421:     /// Constructor for UndirEdgeSetReader. It creates the UndirEdgeSetReader 
deba@1421:     /// and attach it into the given LemonReader. The undirected edgeset 
deba@1421:     /// reader will add the readed undirected edges to the given Graph. It 
deba@1421:     /// will use the given node id reader to read the source and target 
deba@1421:     /// nodes of the edges. The reader will read the section only if the 
deba@1421:     /// \c _id and the \c undiredgset_id are the same. 
deba@1421:     template <typename NodeIdReader>
deba@1421:     UndirEdgeSetReader(LemonReader& _reader, 
deba@1421: 		       typename SmartParameter<Graph>::Type _graph, 
deba@1421: 		       const NodeIdReader& _nodeIdReader, 
deba@1421: 		       const std::string& _id = std::string(),
deba@1421: 		       const DefaultSkipper& _skipper = DefaultSkipper()) 
deba@1476:       : Parent(_reader), graph(_graph), id(_id), skipper(_skipper) {
deba@1476:       checkConcept<_reader_bits::ItemIdReader<Node>, NodeIdReader>();
deba@1476:       nodeIdReader.reset(new IdReader<Node, NodeIdReader>(_nodeIdReader));
deba@1476:     }
deba@1421:     /// \brief Destructor.
deba@1421:     ///
deba@1421:     /// Destructor for UndirEdgeSetReader.
deba@1421:     virtual ~UndirEdgeSetReader() {
deba@1421:       for (typename MapReaders::iterator it = readers.begin(); 
deba@1421: 	   it != readers.end(); ++it) {
deba@1421: 	delete it->second;
deba@1421:       }
deba@1421:     }
deba@1421: 
deba@1421:   private:
deba@1421:     UndirEdgeSetReader(const UndirEdgeSetReader&);
deba@1421:     void operator=(const UndirEdgeSetReader&);
deba@1421: 
deba@1421:   public:
deba@1421: 
deba@1421:     /// \brief Add a new undirected edge map reader command for the reader.
deba@1421:     ///
deba@1421:     /// Add a new edge undirected map reader command for the reader.
deba@1421:     template <typename Map>
deba@1421:     UndirEdgeSetReader& readUndirEdgeMap(std::string name, Map& map) {
deba@1421:       return _readMap<
deba@1421: 	typename Traits::template Reader<typename Map::Value>, Map, 
deba@1421: 	typename SmartParameter<Map>::Type>(name, map);
deba@1421:     }
deba@1421: 
deba@1421:     template <typename Map>
deba@1421:     UndirEdgeSetReader& readUndirEdgeMap(std::string name, const Map& map) {
deba@1421:       return _readMap<
deba@1421: 	typename Traits::template Reader<typename Map::Value>, Map, 
deba@1421: 	typename SmartParameter<Map>::Type>(name, map);
deba@1421:     }
deba@1421: 
deba@1421:     /// \brief Add a new undirected edge map reader command for the reader.
deba@1421:     ///
deba@1421:     /// Add a new edge undirected map reader command for the reader.
deba@1421:     template <typename Reader, typename Map>
deba@1421:     UndirEdgeSetReader& readUndirEdgeMap(std::string name, Map& map, 
deba@1421: 					 const Reader& reader = Reader()) {
deba@1421:       return _readMap<Reader, Map, typename SmartParameter<Map>::Type>
deba@1421: 	(name, map, reader);
deba@1421:     }
deba@1421: 
deba@1421:     template <typename Reader, typename Map>
deba@1421:     UndirEdgeSetReader& readUndirEdgeMap(std::string name, const Map& map, 
deba@1421: 					 const Reader& reader = Reader()) {
deba@1421:       return _readMap<Reader, Map, typename SmartParameter<Map>::Type >
deba@1421: 	(name, map, reader);
deba@1421:     }
deba@1421: 
deba@1421:   private:
deba@1421: 
deba@1421:     template <typename Reader, typename Map, typename MapParameter>
deba@1421:     UndirEdgeSetReader& _readMap(std::string name, MapParameter map,
deba@1421: 				 const Reader& reader = Reader()) {
deba@1421:       if (readers.find(name) != readers.end()) {
deba@1421: 	ErrorMessage msg;
deba@1421: 	msg << "Multiple read rule for edge map: " << name;
deba@1421: 	throw IOParameterError(msg.message());
deba@1421:       }
deba@1421:       readers.insert(
deba@1429: 	make_pair(name, new MapReader<UndirEdge, Map, Reader>(map, reader)));
deba@1421:       return *this;
deba@1421:     }
deba@1421: 
deba@1421:   public:
deba@1421: 
deba@1421:     /// \brief Add a new undirected edge map skipper command for the reader.
deba@1421:     ///
deba@1421:     /// Add a new undirected edge map skipper command for the reader.
deba@1421:     template <typename Reader>
deba@1421:     UndirEdgeSetReader& skipUndirEdgeMap(std::string name, 
deba@1421: 					 const Reader& reader = Reader()) {
deba@1421:       if (readers.find(name) != readers.end()) {
deba@1421: 	ErrorMessage msg;
deba@1421: 	msg << "Multiple read rule for node map: " << name;
deba@1421: 	throw IOParameterError(msg.message());
deba@1421:       }
deba@1429:       readers.insert(make_pair(name, 
deba@1429: 			       new SkipReader<UndirEdge, Reader>(reader)));
deba@1421:       return *this;
deba@1421:     }
deba@1421: 
deba@1421:     /// \brief Add a new directed edge map reader command for the reader.
deba@1421:     ///
deba@1421:     /// Add a new directed edge map reader command for the reader.
deba@1421:     template <typename Map>
deba@1421:     UndirEdgeSetReader& readEdgeMap(std::string name, Map& map) {
deba@1421:       return _readDirMap<
deba@1421: 	typename Traits::template Reader<typename Map::Value>, Map,
deba@1421: 	typename SmartParameter<Map>::Type>(name, map);
deba@1421:     }
deba@1421: 
deba@1421:     template <typename Map>
deba@1421:     UndirEdgeSetReader& readEdgeMap(std::string name, const Map& map) {
deba@1421:       return _readDirMap<
deba@1421: 	typename Traits::template Reader<typename Map::Value>, Map,
deba@1421: 	typename SmartParameter<Map>::Type>(name, map);
deba@1421:     }
deba@1421: 
deba@1421:     /// \brief Add a new directed edge map reader command for the reader.
deba@1421:     ///
deba@1421:     /// Add a new directed edge map reader command for the reader.
deba@1421:     template <typename Reader, typename Map>
deba@1421:     UndirEdgeSetReader& readEdgeMap(std::string name, Map& map, 
deba@1421: 				    const Reader& reader = Reader()) {
deba@1421:       return _readDirMap<Reader, Map, typename SmartParameter<Map>::Type>
deba@1421: 	(name, map, reader);
deba@1421:     }
deba@1421: 
deba@1421:     template <typename Reader, typename Map>
deba@1421:     UndirEdgeSetReader& readEdgeMap(std::string name, const Map& map, 
deba@1421: 				    const Reader& reader = Reader()) {
deba@1421:       return _readDirMap<Reader, Map, typename SmartParameter<Map>::Type>
deba@1421: 	(name, map, reader);
deba@1421:     }
deba@1421: 
deba@1421:   private:
deba@1421: 
deba@1421:     template <typename Reader, typename Map, typename MapParameter>
deba@1421:     UndirEdgeSetReader& _readDirMap(std::string name, MapParameter map,
deba@1421: 				    const Reader& reader = Reader()) {
deba@1421:       readMap("+" + name, 
deba@1421: 	      _reader_bits::writeComposeMap(map, forwardMap(graph)), reader);
deba@1421:       readMap("-" + name, 
deba@1421: 	      _reader_bits::writeComposeMap(map, backwardMap(graph)), reader);
deba@1421:       return *this;      
deba@1421:     }
deba@1421: 
deba@1421:   public:
deba@1421: 
deba@1421:     /// \brief Add a new directed edge map skipper command for the reader.
deba@1421:     ///
deba@1421:     /// Add a new directed edge map skipper command for the reader.
deba@1421:     template <typename Reader>
deba@1421:     UndirEdgeSetReader& skipEdgeMap(std::string name, 
deba@1421: 				    const Reader& reader = Reader()) {
deba@1421:       skipMap("+" + name, reader);
deba@1421:       skipMap("-" + name, reader);
deba@1421:       return *this;
deba@1421:     }
deba@1421: 
deba@1421:   protected:
deba@1421: 
deba@1421:     /// \brief Gives back true when the SectionReader can process 
deba@1421:     /// the section with the given header line.
deba@1421:     ///
deba@1421:     /// It gives back true when the header line starts with \c \@undiredgeset,
deba@1421:     /// and the header line's id and the edgeset's id are the same.
deba@1421:     virtual bool header(const std::string& line) {
deba@1421:       std::istringstream ls(line);
deba@1421:       std::string command;
deba@1421:       std::string name;
deba@1421:       ls >> command >> name;
deba@1421:       return command == "@undiredgeset" && name == id;
deba@1421:     }
deba@1421: 
deba@1421:     /// \brief Reader function of the section.
deba@1421:     ///
deba@1421:     /// It reads the content of the section.
deba@1421:     virtual void read(std::istream& is) {
deba@1476:       if (!nodeIdReader->isIdReader()) {
deba@1476: 	throw DataFormatError("Cannot find nodeset or ID map");
deba@1476:       }
deba@1429:       std::vector<ReaderBase<UndirEdge>* > index;
deba@1421:       std::string line;
deba@1421: 
deba@1421:       getline(is, line);
deba@1421:       std::istringstream ls(line);	
deba@1421:       while (ls >> id) {
deba@1421: 	typename MapReaders::iterator it = readers.find(id);
deba@1421: 	if (it != readers.end()) {
deba@1421: 	  index.push_back(it->second);
deba@1421: 	} else {
deba@1421: 	  index.push_back(&skipper);
deba@1421: 	}
deba@1421: 	if (id == "id" && inverter.get() == 0) {
deba@1421: 	  inverter.reset(index.back()->getInverter());
deba@1421: 	  index.back() = inverter.get();
deba@1421: 	}
deba@1421:       }
deba@1421:       while (getline(is, line)) {	
deba@1421: 	std::istringstream ls(line);
deba@1429: 	Node from = nodeIdReader->read(ls);
deba@1429: 	Node to = nodeIdReader->read(ls);
deba@1429: 	UndirEdge edge = graph.addEdge(from, to);
deba@1421: 	for (int i = 0; i < (int)index.size(); ++i) {
deba@1421: 	  index[i]->read(ls, edge);
deba@1421: 	}
deba@1421:       }
deba@1421:     }
deba@1421: 
deba@1421:   public:
deba@1421: 
deba@1421:     /// \brief Returns true if the edgeset can give back the edge by its id.
deba@1421:     ///
deba@1421:     /// Returns true if the edgeset can give back the undirected edge by its 
deba@1421:     /// id. It is possible only if an "id" named map was read.
deba@1421:     bool isIdReader() const {
deba@1421:       return inverter.get() != 0;
deba@1421:     }
deba@1421: 
deba@1421:     /// \brief Gives back the undirected edge by its id.
deba@1421:     ///
deba@1421:     /// It reads an id from the stream and gives back which undirected edge 
deba@1421:     /// belongs to it. It is possible only if there was read an "id" named map.
deba@1429:     UndirEdge readId(std::istream& is, UndirEdge = UndirEdge()) const {
deba@1421:       return inverter->read(is);
deba@1421:     } 
deba@1421: 
deba@1429:     /// \brief Gives back the directed edge by its id.
deba@1429:     ///
deba@1429:     /// It reads an id from the stream and gives back which directed edge 
deba@1429:     /// belongs to it. The directed edge id is the \c '+' or \c '-' character
deba@1429:     /// and the undirected edge id. It is possible only if there was read 
deba@1429:     /// an "id" named map.
deba@1429:     Edge readId(std::istream& is, Edge = Edge()) const {
deba@1429:       char c;
deba@1429:       is >> c;
deba@1429:       UndirEdge undirEdge = inverter->read(is);
deba@1429:       if (c == '+') {
deba@1429: 	return graph.edgeWithSource(undirEdge, graph.source(undirEdge));
deba@1429:       } else if (c == '-') {
deba@1429: 	return graph.edgeWithSource(undirEdge, graph.target(undirEdge));
deba@1429:       } else {
deba@1429: 	throw DataFormatError("Wrong id format for edge "
deba@1429: 			      "in undirected edgeset");
deba@1429:       }
deba@1429:     } 
deba@1429: 
deba@1421:   private:
deba@1421: 
deba@1429:     typedef std::map<std::string, ReaderBase<UndirEdge>*> MapReaders;
deba@1421:     MapReaders readers;
deba@1421:    
deba@1421:     typename SmartReference<Graph>::Type graph;   
deba@1408:     std::string id;
deba@1429:     SkipReader<UndirEdge, DefaultSkipper> skipper;
deba@1408: 
deba@1429:     std::auto_ptr<InverterBase<UndirEdge> > inverter;
deba@1429:     std::auto_ptr<IdReaderBase<Node> > nodeIdReader;
deba@1408:   };
deba@1408: 
deba@1409:   /// \ingroup io_group
deba@1409:   /// \brief SectionReader for reading labeled nodes.
deba@1409:   ///
deba@1409:   /// The nodes section's header line is \c \@nodes \c nodes_id, but the
deba@1409:   /// \c nodes_id may be empty.
deba@1409:   ///
deba@1409:   /// Each line in the section contains the name of the node 
deba@1409:   /// and then the node id. 
deba@1409:   ///
deba@1409:   /// \relates LemonReader
deba@1409:   template <typename _Graph>
deba@1409:   class NodeReader : public CommonSectionReaderBase {
deba@1409:     typedef CommonSectionReaderBase Parent;
deba@1409:     typedef _Graph Graph;
deba@1429:     typedef typename Graph::Node Node;
deba@1409:   public:
deba@1409:     
deba@1409:     /// \brief Constructor.
deba@1409:     ///
deba@1409:     /// Constructor for NodeReader. It creates the NodeReader and
deba@1409:     /// attach it into the given LemonReader. It will use the given
deba@1409:     /// node id reader to give back the nodes. The reader will read the 
deba@1409:     /// section only if the \c _id and the \c nodes_id are the same. 
deba@1409:     template <typename _IdReader>
deba@1409:     NodeReader(LemonReader& _reader, const _IdReader& _idReader, 
deba@1409: 	       const std::string& _id = std::string()) 
deba@1476:       : Parent(_reader), id(_id) {
deba@1476:       checkConcept<_reader_bits::ItemIdReader<Node>, _IdReader>();
deba@1476:       idReader.reset(new IdReader<Node, _IdReader>(_idReader));
deba@1476:     }
deba@1408: 
deba@1409:     /// \brief Destructor.
deba@1409:     ///
deba@1409:     /// Destructor for NodeReader.
deba@1409:     virtual ~NodeReader() {}
deba@1409: 
deba@1409:   private:
deba@1409:     NodeReader(const NodeReader&);
deba@1409:     void operator=(const NodeReader&);
deba@1409: 
deba@1409:   public:
deba@1409: 
deba@1409:     /// \brief Add a node reader command for the NodeReader.
deba@1409:     ///
deba@1409:     /// Add a node reader command for the NodeReader.
deba@1429:     void readNode(const std::string& name, Node& item) {
deba@1409:       if (readers.find(name) != readers.end()) {
deba@1409: 	ErrorMessage msg;
deba@1409: 	msg << "Multiple read rule for node: " << name;
deba@1409: 	throw IOParameterError(msg.message());
deba@1409:       }
deba@1409:       readers.insert(make_pair(name, &item));
deba@1409:     }
deba@1409: 
deba@1409:   protected:
deba@1409: 
deba@1409:     /// \brief Gives back true when the SectionReader can process 
deba@1409:     /// the section with the given header line.
deba@1409:     ///
deba@1421:     /// It gives back true when the header line start with \c \@nodes,
deba@1409:     /// and the header line's id and the reader's id are the same.
deba@1409:     virtual bool header(const std::string& line) {
deba@1409:       std::istringstream ls(line);
deba@1409:       std::string command;
deba@1409:       std::string name;
deba@1409:       ls >> command >> name;
deba@1409:       return command == "@nodes" && name == id;
deba@1409:     }
deba@1409: 
deba@1409:     /// \brief Reader function of the section.
deba@1409:     ///
deba@1409:     /// It reads the content of the section.
deba@1409:     virtual void read(std::istream& is) {
deba@1476:       if (!idReader->isIdReader()) {
deba@1476: 	throw DataFormatError("Cannot find nodeset or ID map");
deba@1476:       }
deba@1409:       std::string line;
deba@1409:       while (getline(is, line)) {
deba@1409: 	std::istringstream ls(line);
deba@1409: 	std::string id;
deba@1409: 	ls >> id;
deba@1429: 	typename NodeReaders::iterator it = readers.find(id);
deba@1409: 	if (it != readers.end()) {
deba@1409: 	  *(it->second) = idReader->read(ls); 
deba@1409: 	}	
deba@1409:       }
deba@1409:     }
deba@1409:     
deba@1409:   private:
deba@1409: 
deba@1409:     std::string id;
deba@1409: 
deba@1429:     typedef std::map<std::string, Node*> NodeReaders;
deba@1429:     NodeReaders readers;
deba@1429:     std::auto_ptr<IdReaderBase<Node> > idReader;
deba@1409:   };
deba@1409: 
deba@1409:   /// \ingroup io_group
deba@1409:   /// \brief SectionReader for reading labeled edges.
deba@1409:   ///
deba@1409:   /// The edges section's header line is \c \@edges \c edges_id, but the
deba@1409:   /// \c edges_id may be empty.
deba@1409:   ///
deba@1409:   /// Each line in the section contains the name of the edge 
deba@1409:   /// and then the edge id. 
deba@1409:   ///
deba@1409:   /// \relates LemonReader
deba@1409:   template <typename _Graph>
deba@1409:   class EdgeReader : public CommonSectionReaderBase {
deba@1409:     typedef CommonSectionReaderBase Parent;
deba@1409:     typedef _Graph Graph;
deba@1429:     typedef typename Graph::Edge Edge;
deba@1409:   public:
deba@1409:     
deba@1409:     /// \brief Constructor.
deba@1409:     ///
deba@1409:     /// Constructor for EdgeReader. It creates the EdgeReader and
deba@1409:     /// attach it into the given LemonReader. It will use the given
deba@1409:     /// edge id reader to give back the edges. The reader will read the 
deba@1421:     /// section only if the \c _id and the \c edges_id are the same. 
deba@1409:     template <typename _IdReader>
deba@1409:     EdgeReader(LemonReader& _reader, const _IdReader& _idReader, 
deba@1409: 	       const std::string& _id = std::string()) 
deba@1476:       : Parent(_reader), id(_id) {
deba@1476:       checkConcept<_reader_bits::ItemIdReader<Edge>, _IdReader>();
deba@1476:       idReader.reset(new IdReader<Edge, _IdReader>(_idReader));
deba@1476:     }
deba@1409: 
deba@1409:     /// \brief Destructor.
deba@1409:     ///
deba@1409:     /// Destructor for EdgeReader.
deba@1409:     virtual ~EdgeReader() {}
deba@1409:   private:
deba@1409:     EdgeReader(const EdgeReader&);
deba@1409:     void operator=(const EdgeReader&);
deba@1409: 
deba@1409:   public:
deba@1409: 
deba@1409:     /// \brief Add an edge reader command for the EdgeReader.
deba@1409:     ///
deba@1409:     /// Add an edge reader command for the EdgeReader.
deba@1429:     void readEdge(const std::string& name, Edge& item) {
deba@1409:       if (readers.find(name) != readers.end()) {
deba@1409: 	ErrorMessage msg;
deba@1409: 	msg << "Multiple read rule for edge: " << name;
deba@1409: 	throw IOParameterError(msg.message());
deba@1409:       }
deba@1409:       readers.insert(make_pair(name, &item));
deba@1409:     }
deba@1409: 
deba@1409:   protected:
deba@1409: 
deba@1409:     /// \brief Gives back true when the SectionReader can process 
deba@1409:     /// the section with the given header line.
deba@1409:     ///
deba@1421:     /// It gives back true when the header line start with \c \@edges,
deba@1421:     /// and the header line's id and the reader's id are the same.
deba@1421:     virtual bool header(const std::string& line) {
deba@1421:       std::istringstream ls(line);
deba@1421:       std::string command;
deba@1421:       std::string name;
deba@1421:       ls >> command >> name;
deba@1421:       return command == "@edges" && name == id;
deba@1421:     }
deba@1421: 
deba@1421:     /// \brief Reader function of the section.
deba@1421:     ///
deba@1421:     /// It reads the content of the section.
deba@1421:     virtual void read(std::istream& is) {
deba@1476:       if (!idReader->isIdReader()) {
deba@1476: 	throw DataFormatError("Cannot find edgeset or ID map");
deba@1476:       }
deba@1421:       std::string line;
deba@1421:       while (getline(is, line)) {
deba@1421: 	std::istringstream ls(line);
deba@1421: 	std::string id;
deba@1421: 	ls >> id;
deba@1429: 	typename EdgeReaders::iterator it = readers.find(id);
deba@1421: 	if (it != readers.end()) {
deba@1421: 	  *(it->second) = idReader->read(ls); 
deba@1421: 	}	
deba@1421:       }
deba@1421:     }
deba@1421:     
deba@1421:   private:
deba@1421: 
deba@1421:     std::string id;
deba@1421: 
deba@1429:     typedef std::map<std::string, Edge*> EdgeReaders;
deba@1429:     EdgeReaders readers;
deba@1429:     std::auto_ptr<IdReaderBase<Edge> > idReader;
deba@1421:   };
deba@1421: 
deba@1421:   /// \ingroup io_group
deba@1421:   /// \brief SectionReader for reading labeled undirected edges.
deba@1421:   ///
deba@1421:   /// The undirected edges section's header line is \c \@undiredges 
deba@1421:   /// \c undiredges_id, but the \c undiredges_id may be empty.
deba@1421:   ///
deba@1421:   /// Each line in the section contains the name of the undirected edge 
deba@1421:   /// and then the undirected edge id. 
deba@1421:   ///
deba@1421:   /// \relates LemonReader
deba@1421:   template <typename _Graph>
deba@1421:   class UndirEdgeReader : public CommonSectionReaderBase {
deba@1421:     typedef CommonSectionReaderBase Parent;
deba@1421:     typedef _Graph Graph;
deba@1429:     typedef typename Graph::Edge Edge;
deba@1429:     typedef typename Graph::UndirEdge UndirEdge;
deba@1421:   public:
deba@1421:     
deba@1421:     /// \brief Constructor.
deba@1421:     ///
deba@1421:     /// Constructor for UndirEdgeReader. It creates the UndirEdgeReader and
deba@1421:     /// attach it into the given LemonReader. It will use the given
deba@1421:     /// undirected edge id reader to give back the edges. The reader will 
deba@1421:     /// read the section only if the \c _id and the \c undiredges_id are 
deba@1421:     /// the same. 
deba@1421:     template <typename _IdReader>
deba@1421:     UndirEdgeReader(LemonReader& _reader, const _IdReader& _idReader, 
deba@1421: 	       const std::string& _id = std::string()) 
deba@1476:       : Parent(_reader), id(_id) {
deba@1476:       checkConcept<_reader_bits::ItemIdReader<UndirEdge>, _IdReader>();
deba@1476:       checkConcept<_reader_bits::ItemIdReader<Edge>, _IdReader>();
deba@1476:       undirEdgeIdReader.reset(new IdReader<UndirEdge, _IdReader>(_idReader));
deba@1477:       edgeIdReader.reset(new IdReader<Edge, _IdReader>(_idReader));
deba@1476:     }
deba@1421: 
deba@1421:     /// \brief Destructor.
deba@1421:     ///
deba@1421:     /// Destructor for UndirEdgeReader.
deba@1421:     virtual ~UndirEdgeReader() {}
deba@1421:   private:
deba@1421:     UndirEdgeReader(const UndirEdgeReader&);
deba@1421:     void operator=(const UndirEdgeReader&);
deba@1421: 
deba@1421:   public:
deba@1421: 
deba@1421:     /// \brief Add an undirected edge reader command for the UndirEdgeReader.
deba@1421:     ///
deba@1421:     /// Add an undirected edge reader command for the UndirEdgeReader.
deba@1429:     void readUndirEdge(const std::string& name, UndirEdge& item) {
deba@1429:       if (undirEdgeReaders.find(name) != undirEdgeReaders.end()) {
deba@1429: 	ErrorMessage msg;
deba@1429: 	msg << "Multiple read rule for undirected edge: " << name;
deba@1429: 	throw IOParameterError(msg.message());
deba@1429:       }
deba@1429:       undirEdgeReaders.insert(make_pair(name, &item));
deba@1429:     }
deba@1429: 
deba@1429:     /// \brief Add an edge reader command for the UndirEdgeReader.
deba@1429:     ///
deba@1429:     /// Add an edge reader command for the UndirEdgeReader.
deba@1429:     void readEdge(const std::string& name, Edge& item) {
deba@1429:       if (edgeReaders.find(name) != edgeReaders.end()) {
deba@1421: 	ErrorMessage msg;
deba@1421: 	msg << "Multiple read rule for edge: " << name;
deba@1421: 	throw IOParameterError(msg.message());
deba@1421:       }
deba@1429:       edgeReaders.insert(make_pair(name, &item));
deba@1421:     }
deba@1421: 
deba@1421:   protected:
deba@1421: 
deba@1421:     /// \brief Gives back true when the SectionReader can process 
deba@1421:     /// the section with the given header line.
deba@1421:     ///
deba@1421:     /// It gives back true when the header line start with \c \@edges,
deba@1409:     /// and the header line's id and the reader's id are the same.
deba@1409:     virtual bool header(const std::string& line) {
deba@1409:       std::istringstream ls(line);
deba@1409:       std::string command;
deba@1409:       std::string name;
deba@1409:       ls >> command >> name;
deba@1429:       return command == "@undiredges" && name == id;
deba@1409:     }
deba@1409: 
deba@1409:     /// \brief Reader function of the section.
deba@1409:     ///
deba@1409:     /// It reads the content of the section.
deba@1409:     virtual void read(std::istream& is) {
deba@1476:       if (!edgeIdReader->isIdReader()) {
deba@1476: 	throw DataFormatError("Cannot find undirected edgeset or ID map");
deba@1476:       }
deba@1476:       if (!undirEdgeIdReader->isIdReader()) {
deba@1476: 	throw DataFormatError("Cannot find undirected edgeset or ID map");
deba@1476:       }
deba@1409:       std::string line;
deba@1409:       while (getline(is, line)) {
deba@1409: 	std::istringstream ls(line);
deba@1409: 	std::string id;
deba@1409: 	ls >> id;
deba@1429: 	{
deba@1429: 	  typename UndirEdgeReaders::iterator it = undirEdgeReaders.find(id);
deba@1429: 	  if (it != undirEdgeReaders.end()) {
deba@1429: 	    *(it->second) = undirEdgeIdReader->read(ls); 
deba@1429: 	    break;
deba@1429: 	  }	
deba@1429: 	} {
deba@1429: 	  typename EdgeReaders::iterator it = edgeReaders.find(id);
deba@1429: 	  if (it != edgeReaders.end()) {
deba@1429: 	    *(it->second) = edgeIdReader->read(ls); 
deba@1429: 	    break;
deba@1429: 	  }	
deba@1429: 	}
deba@1409:       }
deba@1409:     }
deba@1409:     
deba@1409:   private:
deba@1409: 
deba@1409:     std::string id;
deba@1409: 
deba@1429:     typedef std::map<std::string, UndirEdge*> UndirEdgeReaders;
deba@1429:     UndirEdgeReaders undirEdgeReaders;
deba@1429:     std::auto_ptr<IdReaderBase<UndirEdge> > undirEdgeIdReader;
deba@1429: 
deba@1429:     typedef std::map<std::string, Edge*> EdgeReaders;
deba@1429:     EdgeReaders edgeReaders;
deba@1429:     std::auto_ptr<IdReaderBase<Edge> > edgeIdReader;
deba@1409:   };
deba@1409: 
deba@1409:   /// \ingroup io_group
deba@1409:   /// \brief SectionReader for attributes.
deba@1409:   ///
deba@1409:   /// The lemon format can store multiple attribute set. Each set has
deba@1409:   /// the header line \c \@attributes \c attributeset_id, but the 
deba@1409:   /// attributeset_id may be empty.
deba@1409:   ///
deba@1409:   /// The attributeset section contains several lines. Each of them starts
deba@1409:   /// with an attribute and then a the value for the id.
deba@1409:   ///
deba@1409:   /// \relates LemonReader
deba@1408:   template <typename _Traits = DefaultReaderTraits>
deba@1408:   class AttributeReader : public CommonSectionReaderBase {
deba@1408:     typedef CommonSectionReaderBase Parent;
deba@1408:     typedef _Traits Traits; 
deba@1408:   public:
deba@1409:     /// \brief Constructor.
deba@1409:     ///
deba@1409:     /// Constructor for AttributeReader. It creates the AttributeReader and
deba@1409:     /// attach it into the given LemonReader. The reader process a section
deba@1409:     /// only if the \c section_id and the \c _id are the same.
deba@1408:     AttributeReader(LemonReader& _reader, 
deba@1409: 		    const std::string& _id = std::string()) 
deba@1409:       : Parent(_reader), id(_id) {}
deba@1408: 
deba@1409:     /// \brief Destructor.
deba@1409:     ///
deba@1409:     /// Destructor for AttributeReader.
deba@1408:     virtual ~AttributeReader() {
deba@1408:       for (typename Readers::iterator it = readers.begin(); 
deba@1408: 	   it != readers.end(); ++it) {
deba@1408: 	delete it->second;
deba@1408:       }
deba@1408:     }
deba@1408: 
deba@1408:   private:
deba@1408:     AttributeReader(const AttributeReader&);
deba@1408:     void operator=(AttributeReader&);
deba@1408: 
deba@1408:   public:
deba@1409:     /// \brief Add an attribute reader command for the reader.
deba@1409:     ///
deba@1409:     /// Add an attribute reader command for the reader.
deba@1408:     template <typename Value>
deba@1408:     AttributeReader& readAttribute(const std::string& id, Value& value) {
deba@1408:       return readAttribute<typename Traits::template Reader<Value> >
deba@1408: 	(id, value);
deba@1408:     }
deba@1408: 
deba@1409:     /// \brief Add an attribute reader command for the reader.
deba@1409:     ///
deba@1409:     /// Add an attribute reader command for the reader.
deba@1408:     template <typename Reader, typename Value>
deba@1408:     AttributeReader& readAttribute(const std::string& name, Value& value,
deba@1408: 				   const Reader& reader = Reader()) {
deba@1408:       if (readers.find(name) != readers.end()) {
deba@1408: 	ErrorMessage msg;
deba@1408: 	msg << "Multiple read rule for attribute: " << name;
deba@1408: 	throw IOParameterError(msg.message());
deba@1408:       }
deba@1408:       readers.insert(make_pair(name, new ValueReader<Value, Reader>
deba@1408:       			       (value, reader)));
deba@1408:       return *this;
deba@1408:     }
deba@1408: 
deba@1409:   protected:
deba@1409: 
deba@1409:     /// \brief Gives back true when the SectionReader can process 
deba@1409:     /// the section with the given header line.
deba@1409:     ///
deba@1421:     /// It gives back true when the header line start with \c \@attributes,
deba@1409:     /// and the header line's id and the attributeset's id are the same.
deba@1408:     bool header(const std::string& line) {
deba@1408:       std::istringstream ls(line);
deba@1408:       std::string command;
deba@1408:       std::string name;
deba@1408:       ls >> command >> name;
deba@1408:       return command == "@attributes" && name == id;
deba@1408:     }
deba@1408: 
deba@1409:     /// \brief Reader function of the section.
deba@1409:     ///
deba@1409:     /// It reads the content of the section.
deba@1408:     void read(std::istream& is) {
deba@1408:       std::string line;
deba@1408:       while (getline(is, line)) {
deba@1408: 	std::istringstream ls(line);
deba@1408: 	std::string id;
deba@1408: 	ls >> id;
deba@1408: 	typename Readers::iterator it = readers.find(id);
deba@1408: 	if (it != readers.end()) {
deba@1408: 	  it->second->read(ls);
deba@1408: 	}
deba@1408:       }
deba@1408:     }    
deba@1408: 
deba@1408:   private:
deba@1408:     std::string id;
deba@1408: 
deba@1408:     typedef std::map<std::string, ValueReaderBase*> Readers;
deba@1409:     Readers readers;  
deba@1408:   };
deba@1408: 
deba@1423:   /// \ingroup io_group
deba@1423:   /// \brief SectionReader for retrieve what is in the file.
deba@1423:   ///
deba@1423:   /// SectionReader for retrieve what is in the file. If you want
deba@1423:   /// to know which sections, maps and items are in the file
deba@1423:   /// use the next code:
deba@1423:   /// \code
deba@1423:   /// LemonReader reader("input.lgf");
deba@1423:   /// ContentReader content(reader);
deba@1423:   /// reader.run();
deba@1423:   /// \endcode
deba@1423:   class ContentReader : public LemonReader::SectionReader {
deba@1423:     typedef LemonReader::SectionReader Parent;
deba@1423:   public:
deba@1423:     /// \brief Constructor.
deba@1423:     ///
deba@1423:     /// Constructor for
deba@1423:     ContentReader(LemonReader& _reader) : Parent(_reader) {}
deba@1423: 
deba@1423:     /// \brief Desctructor.
deba@1423:     ///
deba@1423:     /// Desctructor.
deba@1423:     virtual ~ContentReader() {}
deba@1423: 
deba@1423:     /// \brief Gives back how many nodesets are in the file.
deba@1423:     ///
deba@1423:     /// Gives back how many nodesets are in the file.
deba@1423:     int nodeSetNum() const {
deba@1423:       return nodesets.size();
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back the name of nodeset on the indiced position.
deba@1423:     ///
deba@1423:     /// Gives back the name of nodeset on the indiced position.
deba@1423:     std::string nodeSetName(int index) const {
deba@1423:       return nodesets[index].name;
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back the map names of nodeset on the indiced position.
deba@1423:     ///
deba@1423:     /// Gives back the map names of nodeset on the indiced position.
deba@1423:     const std::vector<std::string>& nodeSetMaps(int index) const {
deba@1423:       return nodesets[index].items;
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back how many edgesets are in the file.
deba@1423:     ///
deba@1423:     /// Gives back how many edgesets are in the file.
deba@1423:     int edgeSetNum() const {
deba@1423:       return edgesets.size();
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back the name of edgeset on the indiced position.
deba@1423:     ///
deba@1423:     /// Gives back the name of edgeset on the indiced position.
deba@1423:     std::string edgeSetName(int index) const {
deba@1423:       return edgesets[index].name;
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back the map names of edgeset on the indiced position.
deba@1423:     ///
deba@1423:     /// Gives back the map names of edgeset on the indiced position.
deba@1423:     const std::vector<std::string>& edgeSetMaps(int index) const {
deba@1423:       return edgesets[index].items;
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back how many undirected edgesets are in the file.
deba@1423:     ///
deba@1423:     /// Gives back how many undirected edgesets are in the file.
deba@1423:     int undirEdgeSetNum() const {
deba@1423:       return undiredgesets.size();
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back the name of undirected edgeset on the indiced 
deba@1423:     /// position.
deba@1423:     ///
deba@1423:     /// Gives back the name of undirected edgeset on the indiced position.
deba@1423:     std::string undirEdgeSetName(int index) const {
deba@1423:       return undiredgesets[index].name;
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back the map names of undirected edgeset on the indiced 
deba@1423:     /// position.
deba@1423:     ///
deba@1423:     /// Gives back the map names of undirected edgeset on the indiced position.
deba@1423:     const std::vector<std::string>& undirEdgeSetMaps(int index) const {
deba@1423:       return undiredgesets[index].items;
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back how many labeled nodes section are in the file.
deba@1423:     ///
deba@1423:     /// Gives back how many labeled nodes section are in the file.
deba@1423:     int nodesNum() const {
deba@1423:       return nodes.size();
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back the name of labeled nodes section on the indiced 
deba@1423:     /// position.
deba@1423:     ///
deba@1423:     /// Gives back the name of labeled nodes section on the indiced position.
deba@1423:     std::string nodesName(int index) const {
deba@1423:       return nodes[index].name;
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back the names of the labeled nodes in the indiced 
deba@1423:     /// section.
deba@1423:     ///
deba@1423:     /// Gives back the names of the labeled nodes in the indiced section.
deba@1423:     const std::vector<std::string>& nodesItems(int index) const {
deba@1423:       return nodes[index].items;
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back how many labeled edges section are in the file.
deba@1423:     ///
deba@1423:     /// Gives back how many labeled edges section are in the file.
deba@1423:     int edgesNum() const {
deba@1423:       return edges.size();
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back the name of labeled edges section on the indiced 
deba@1423:     /// position.
deba@1423:     ///
deba@1423:     /// Gives back the name of labeled edges section on the indiced position.
deba@1423:     std::string edgesName(int index) const {
deba@1423:       return edges[index].name;
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back the names of the labeled edges in the indiced 
deba@1423:     /// section.
deba@1423:     ///
deba@1423:     /// Gives back the names of the labeled edges in the indiced section.
deba@1423:     const std::vector<std::string>& edgesItems(int index) const {
deba@1423:       return edges[index].items;
deba@1423:     }
deba@1423:  
deba@1423:     /// \brief Gives back how many labeled undirected edges section are 
deba@1423:     /// in the file.
deba@1423:     ///
deba@1423:     /// Gives back how many labeled undirected edges section are in the file.
deba@1423:     int undirEdgesNum() const {
deba@1423:       return undiredges.size();
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back the name of labeled undirected edges section 
deba@1423:     /// on the indiced position.
deba@1423:     ///
deba@1423:     /// Gives back the name of labeled undirected edges section on the 
deba@1423:     /// indiced position.
deba@1423:     std::string undirEdgesName(int index) const {
deba@1423:       return undiredges[index].name;
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back the names of the labeled undirected edges in 
deba@1423:     /// the indiced section.
deba@1423:     ///
deba@1423:     /// Gives back the names of the labeled undirected edges in the 
deba@1423:     /// indiced section.
deba@1423:     const std::vector<std::string>& undirEdgesItems(int index) const {
deba@1423:       return undiredges[index].items;
deba@1423:     }
deba@1423: 
deba@1423:  
deba@1423:     /// \brief Gives back how many attributes section are in the file.
deba@1423:     ///
deba@1423:     /// Gives back how many attributes section are in the file.
deba@1423:     int attributesNum() const {
deba@1423:       return attributes.size();
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back the name of attributes section on the indiced 
deba@1423:     /// position.
deba@1423:     ///
deba@1423:     /// Gives back the name of attributes section on the indiced position.
deba@1423:     std::string attributesName(int index) const {
deba@1423:       return attributes[index].name;
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Gives back the names of the attributes in the indiced section.
deba@1423:     ///
deba@1423:     /// Gives back the names of the attributes in the indiced section.
deba@1423:     const std::vector<std::string>& attributesItems(int index) const {
deba@1423:       return attributes[index].items;
deba@1423:     }
deba@1423: 
deba@1423:     const std::vector<std::string>& otherSections() const {
deba@1423:       return sections;
deba@1423:     }
deba@1423: 
deba@1423:   protected:
deba@1423:     
deba@1423:     /// \brief Gives back true when the SectionReader can process 
deba@1423:     /// the section with the given header line.
deba@1423:     ///
deba@1423:     /// It gives back true when the section is common section.
deba@1423:     bool header(const std::string& line) {
deba@1423:       std::istringstream ls(line);
deba@1423:       std::string command, name;
deba@1423:       ls >> command >> name;
deba@1423:       if (command == "@nodeset") {
deba@1423: 	current = command;
deba@1423: 	nodesets.push_back(SectionInfo(name));
deba@1423:       } else if (command == "@edgeset") {
deba@1423: 	current = command;
deba@1423: 	edgesets.push_back(SectionInfo(name));
deba@1423:       } else if (command == "@undiredgeset") {
deba@1423: 	current = command;
deba@1423: 	undiredgesets.push_back(SectionInfo(name));
deba@1423:       } else if (command == "@nodes") {
deba@1423: 	current = command;
deba@1423: 	nodes.push_back(SectionInfo(name));
deba@1423:       } else if (command == "@edges") {
deba@1423: 	current = command;
deba@1423: 	edges.push_back(SectionInfo(name));
deba@1423:       } else if (command == "@undiredges") {
deba@1423: 	current = command;
deba@1423: 	undiredges.push_back(SectionInfo(name));
deba@1423:       } else if (command == "@attributes") {
deba@1423: 	current = command;
deba@1423: 	attributes.push_back(SectionInfo(name));
deba@1423:       } else {
deba@1423: 	sections.push_back(line);
deba@1423: 	return false;
deba@1423:       }
deba@1423:       return true;
deba@1423:     }
deba@1423: 
deba@1423:     /// \brief Retrieve the items from various sections.
deba@1423:     ///
deba@1423:     /// Retrieve the items from various sections.
deba@1423:     void read(std::istream& is) {
deba@1423:       if (current == "@nodeset") {
deba@1423: 	readMapNames(is, nodesets.back().items);
deba@1423:       } else if (current == "@edgeset") {
deba@1423: 	readMapNames(is, edgesets.back().items);
deba@1423:       } else if (current == "@undiredgeset") {
deba@1423: 	readMapNames(is, undiredgesets.back().items);
deba@1423:       } else if (current == "@nodes") {
deba@1423: 	readItemNames(is, nodes.back().items);
deba@1423:       } else if (current == "@edges") {
deba@1423: 	readItemNames(is, edges.back().items);
deba@1423:       } else if (current == "@undiredges") {
deba@1423: 	readItemNames(is, undiredges.back().items);
deba@1423:       } else if (current == "@attributes") {
deba@1423: 	readItemNames(is, attributes.back().items);
deba@1423:       }
deba@1423:     }    
deba@1423: 
deba@1423:   private:
deba@1423: 
deba@1423:     void readMapNames(std::istream& is, std::vector<std::string>& maps) {
deba@1423:       std::string line, id;
deba@1423:       std::getline(is, line);
deba@1423:       std::istringstream ls(line);
deba@1423:       while (ls >> id) {
deba@1423: 	maps.push_back(id);
deba@1423:       }
deba@1423:       while (getline(is, line));
deba@1423:     }
deba@1423: 
deba@1423:     void readItemNames(std::istream& is, std::vector<std::string>& maps) {
deba@1423:       std::string line, id;
deba@1423:       while (std::getline(is, line)) {
deba@1423: 	std::istringstream ls(line);
deba@1423: 	ls >> id;
deba@1423: 	maps.push_back(id);
deba@1423:       }
deba@1423:     }
deba@1423: 
deba@1423:     struct SectionInfo {
deba@1423:       std::string name;
deba@1423:       std::vector<std::string> items;
deba@1423: 
deba@1423:       SectionInfo(const std::string& _name) : name(_name) {}
deba@1423:     };
deba@1423: 
deba@1423:     std::vector<SectionInfo> nodesets;
deba@1423:     std::vector<SectionInfo> edgesets;
deba@1423:     std::vector<SectionInfo> undiredgesets;
deba@1423: 
deba@1423:     std::vector<SectionInfo> nodes;
deba@1423:     std::vector<SectionInfo> edges;
deba@1423:     std::vector<SectionInfo> undiredges;
deba@1423: 
deba@1423:     std::vector<SectionInfo> attributes;
deba@1423: 
deba@1423:     std::vector<std::string> sections;
deba@1423: 
deba@1423:     std::string current;
deba@1423: 
deba@1423:   };
deba@1423: 
deba@1408: }
deba@1408: #endif