1 | /* -*- C++ -*- |
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2 | * src/lemon/graph_reader.h - Part of LEMON, a generic C++ optimization library |
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3 | * |
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4 | * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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5 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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6 | * |
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7 | * Permission to use, modify and distribute this software is granted |
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8 | * provided that this copyright notice appears in all copies. For |
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9 | * precise terms see the accompanying LICENSE file. |
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10 | * |
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11 | * This software is provided "AS IS" with no warranty of any kind, |
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12 | * express or implied, and with no claim as to its suitability for any |
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13 | * purpose. |
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14 | * |
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15 | */ |
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16 | |
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17 | ///\ingroup io_group |
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18 | ///\file |
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19 | ///\brief Lemon Graph Format reader. |
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20 | |
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21 | #ifndef LEMON_GRAPH_READER_H |
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22 | #define LEMON_GRAPH_READER_H |
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23 | |
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24 | #include <iostream> |
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25 | #include <sstream> |
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26 | |
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27 | #include <map> |
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28 | #include <vector> |
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29 | |
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30 | #include <memory> |
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31 | |
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32 | #include <lemon/error.h> |
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33 | |
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34 | |
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35 | namespace lemon { |
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36 | |
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37 | /// \addtogroup io_group |
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38 | /// @{ |
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39 | |
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40 | /// \brief Standard ReaderTraits for the GraphReader class. |
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41 | /// |
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42 | /// Standard ReaderTraits for the GraphReader class. |
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43 | /// It defines standard reading method for all type of value. |
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44 | /// \author Balazs Dezso |
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45 | struct DefaultReaderTraits { |
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46 | |
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47 | /// \brief Template class for reading an value. |
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48 | /// |
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49 | /// Template class for reading an value. |
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50 | /// \author Balazs Dezso |
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51 | template <typename _Value> |
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52 | struct Reader { |
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53 | /// The value type. |
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54 | typedef _Value Value; |
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55 | /// \brief Reads a value from the given stream. |
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56 | /// |
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57 | /// Reads a value from the given stream. |
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58 | void read(std::istream& is, Value& value) { |
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59 | if (!(is >> value)) |
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60 | throw DataFormatError("Default reader format exception"); |
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61 | } |
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62 | }; |
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63 | |
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64 | /// \brief Returns wheter this name is an ID map name. |
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65 | /// |
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66 | /// Returns wheter this name is an ID map name. |
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67 | static bool idMapName(const std::string& name) { |
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68 | return name == "id"; |
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69 | } |
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70 | |
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71 | /// The reader class for the not needed maps. |
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72 | typedef Reader<std::string> DefaultReader; |
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73 | |
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74 | }; |
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75 | |
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76 | /// \brief Reader class for quoted strings. |
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77 | /// |
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78 | /// Reader class for quoted strings. It can process the escape |
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79 | /// sequences in the string. |
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80 | /// \author Balazs Dezso |
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81 | class QuotedStringReader { |
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82 | public: |
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83 | typedef std::string Value; |
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84 | |
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85 | /// \brief Constructor for the reader. |
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86 | /// |
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87 | /// Constructor for the reader. If the given parameter is true |
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88 | /// the reader processes the escape sequences. |
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89 | QuotedStringReader(bool _escaped = true) : escaped(_escaped) {} |
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90 | |
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91 | /// \brief Reads a quoted string from the given stream. |
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92 | /// |
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93 | /// Reads a quoted string from the given stream. |
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94 | void read(std::istream& is, std::string& value) { |
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95 | char c; |
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96 | value.clear(); |
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97 | is >> std::ws; |
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98 | if (!is.get(c) || c != '\"') |
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99 | throw DataFormatError("Quoted string format error"); |
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100 | while (is.get(c) && c != '\"') { |
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101 | if (escaped && c == '\\') { |
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102 | value += readEscape(is); |
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103 | } else { |
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104 | value += c; |
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105 | } |
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106 | } |
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107 | if (!is) throw DataFormatError("Quoted string format error"); |
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108 | } |
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109 | |
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110 | private: |
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111 | |
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112 | static char readEscape(std::istream& is) { |
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113 | char c; |
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114 | switch (is.get(c), c) { |
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115 | case '\\': |
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116 | return '\\'; |
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117 | case '\"': |
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118 | return '\"'; |
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119 | case '\'': |
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120 | return '\''; |
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121 | case '\?': |
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122 | return '\?'; |
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123 | case 'a': |
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124 | return '\a'; |
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125 | case 'b': |
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126 | return '\b'; |
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127 | case 'f': |
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128 | return '\f'; |
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129 | case 'n': |
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130 | return '\n'; |
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131 | case 'r': |
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132 | return '\r'; |
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133 | case 't': |
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134 | return '\t'; |
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135 | case 'v': |
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136 | return '\v'; |
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137 | case 'x': |
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138 | { |
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139 | int code; |
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140 | if (!is.get(c) || !isHex(c)) |
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141 | throw DataFormatError("Escape format error"); |
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142 | else if (code = valueHex(c), !is.get(c) || !isHex(c)) is.putback(c); |
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143 | else code = code * 16 + valueHex(c); |
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144 | return code; |
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145 | } |
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146 | default: |
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147 | { |
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148 | int code; |
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149 | if (!isOct(c)) |
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150 | throw DataFormatError("Escape format error"); |
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151 | else if (code = valueOct(c), !is.get(c) || !isOct(c)) |
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152 | is.putback(c); |
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153 | else if (code = code * 8 + valueOct(c), !is.get(c) || !isOct(c)) |
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154 | is.putback(c); |
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155 | else code = code * 8 + valueOct(c); |
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156 | return code; |
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157 | } |
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158 | } |
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159 | } |
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160 | |
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161 | static bool isOct(char c) { |
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162 | return '0' <= c && c <='7'; |
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163 | } |
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164 | |
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165 | static int valueOct(char c) { |
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166 | return c - '0'; |
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167 | } |
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168 | |
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169 | static bool isHex(char c) { |
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170 | return ('0' <= c && c <= '9') || |
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171 | ('a' <= c && c <= 'z') || |
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172 | ('A' <= c && c <= 'Z'); |
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173 | } |
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174 | |
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175 | static int valueHex(char c) { |
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176 | if ('0' <= c && c <= '9') return c - '0'; |
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177 | if ('a' <= c && c <= 'z') return c - 'a' + 10; |
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178 | return c - 'A' + 10; |
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179 | } |
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180 | |
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181 | bool escaped; |
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182 | }; |
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183 | |
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184 | /// \brief The graph reader class. |
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185 | /// |
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186 | /// |
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187 | /// The given file format may contain several maps and labeled nodes or |
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188 | /// edges. |
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189 | /// |
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190 | /// If you read a graph you need not read all the maps and items just those |
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191 | /// that you need. The interface of the \c GraphReader is very similar to |
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192 | /// the GraphWriter but the reading method does not depend on the order the |
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193 | /// given commands. |
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194 | /// |
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195 | /// The reader object suppose that each not readed value does not contain |
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196 | /// whitespaces, therefore it has some extra possibilities to control how |
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197 | /// it should skip the values when the string representation contains spaces. |
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198 | /// |
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199 | /// \code |
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200 | /// GraphReader<ListGraph> reader(std::cin, graph); |
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201 | /// \endcode |
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202 | /// |
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203 | /// The \c addNodeMap() function reads a map from the \c \@nodeset section. |
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204 | /// If there is a map that you do not want to read from the file and there is |
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205 | /// whitespace in the string represenation of the values then you should |
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206 | /// call the \c skipNodeMap() template member function with proper |
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207 | /// parameters. |
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208 | /// |
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209 | /// \code |
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210 | /// reader.addNodeMap("x-coord", xCoordMap); |
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211 | /// reader.addNodeMap("y-coord", yCoordMap); |
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212 | /// |
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213 | /// reader.addNodeMap<QuotedStringReader>("label", labelMap); |
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214 | /// reader.skipNodeMap<QuotedStringReader>("description"); |
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215 | /// |
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216 | /// reader.addNodeMap("color", colorMap); |
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217 | /// \endcode |
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218 | /// |
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219 | /// With the \c addEdgeMap() member function you can give an edge map |
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220 | /// reading command similar to the NodeMaps. |
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221 | /// |
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222 | /// \code |
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223 | /// reader.addEdgeMap("weight", weightMap); |
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224 | /// reader.addEdgeMap("label", labelMap); |
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225 | /// \endcode |
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226 | /// |
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227 | /// With \c addNode() and \c addEdge() functions you can read labeled Nodes |
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228 | /// and Edges. |
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229 | /// |
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230 | /// \code |
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231 | /// reader.addNode("source", sourceNode); |
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232 | /// reader.addNode("target", targetNode); |
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233 | /// |
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234 | /// reader.addEdge("observed", edge); |
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235 | /// \endcode |
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236 | /// |
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237 | /// After you give all read commands you must call the \c run() member |
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238 | /// function, which execute all the commands. |
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239 | /// |
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240 | /// \code |
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241 | /// reader.run(); |
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242 | /// \endcode |
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243 | /// |
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244 | /// \see DefaultReaderTraits |
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245 | /// \see QuotedStringReader |
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246 | /// \see \ref GraphWriter |
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247 | /// \see \ref graph-io-page |
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248 | /// \author Balazs Dezso |
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249 | template <typename _Graph, typename _ReaderTraits = DefaultReaderTraits> |
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250 | class GraphReader { |
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251 | public: |
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252 | |
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253 | typedef _Graph Graph; |
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254 | typedef typename Graph::Node Node; |
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255 | typedef typename Graph::Edge Edge; |
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256 | |
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257 | typedef _ReaderTraits ReaderTraits; |
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258 | typedef typename ReaderTraits::DefaultReader DefaultReader; |
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259 | |
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260 | /// \brief Construct a new GraphReader. |
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261 | /// |
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262 | /// Construct a new GraphReader. It reads into the given graph |
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263 | /// and it use the given reader as the default skipper. |
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264 | GraphReader(std::istream& _is, Graph& _graph, |
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265 | const DefaultReader& _reader = DefaultReader()) |
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266 | : is(_is), graph(_graph), nodeSkipper(_reader), edgeSkipper(_reader) {} |
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267 | |
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268 | /// \brief Destruct the graph reader. |
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269 | /// |
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270 | /// Destruct the graph reader. |
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271 | ~GraphReader() { |
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272 | for (typename NodeMapReaders::iterator it = node_map_readers.begin(); |
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273 | it != node_map_readers.end(); ++it) { |
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274 | delete it->second; |
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275 | } |
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276 | |
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277 | for (typename EdgeMapReaders::iterator it = edge_map_readers.begin(); |
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278 | it != edge_map_readers.end(); ++it) { |
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279 | delete it->second; |
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280 | } |
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281 | |
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282 | } |
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283 | |
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284 | /// \brief Add a new node map reader command for the reader. |
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285 | /// |
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286 | /// Add a new node map reader command for the reader. |
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287 | template <typename Map> |
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288 | GraphReader& addNodeMap(std::string name, Map& map) { |
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289 | return addNodeMap<typename ReaderTraits::template |
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290 | Reader<typename Map::Value>, Map>(name, map); |
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291 | } |
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292 | |
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293 | /// \brief Add a new node map reader command for the reader. |
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294 | /// |
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295 | /// Add a new node map reader command for the reader. |
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296 | template <typename Reader, typename Map> |
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297 | GraphReader& addNodeMap(std::string name, Map& map, |
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298 | const Reader& reader = Reader()) { |
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299 | if (node_map_readers.find(name) != node_map_readers.end()) { |
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300 | ErrorMessage msg; |
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301 | msg << "Multiple read rule for node map: " << name; |
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302 | throw IOParameterError(msg.message()); |
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303 | } |
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304 | node_map_readers.insert( |
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305 | make_pair(name, new MapReader<Node, Map, Reader>(map, reader))); |
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306 | return *this; |
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307 | } |
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308 | |
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309 | /// \brief Add a new node map skipper command for the reader. |
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310 | /// |
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311 | /// Add a new node map skipper command for the reader. |
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312 | template <typename Reader> |
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313 | GraphReader& skipNodeMap(std::string name, |
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314 | const Reader& reader = Reader()) { |
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315 | if (node_map_readers.find(name) != node_map_readers.end()) { |
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316 | ErrorMessage msg; |
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317 | msg << "Multiple read rule for node map: " << name; |
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318 | throw IOParameterError(msg.message()); |
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319 | } |
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320 | node_map_readers.insert( |
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321 | make_pair(name, new SkipReader<Node, Reader>(reader))); |
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322 | return *this; |
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323 | } |
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324 | |
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325 | /// \brief Add a new edge map reader command for the reader. |
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326 | /// |
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327 | /// Add a new edge map reader command for the reader. |
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328 | template <typename Map> |
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329 | GraphReader& addEdgeMap(std::string name, Map& map) { |
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330 | return addEdgeMap<typename ReaderTraits::template |
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331 | Reader<typename Map::Value>, Map>(name, map); |
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332 | } |
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333 | |
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334 | |
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335 | /// \brief Add a new edge map reader command for the reader. |
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336 | /// |
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337 | /// Add a new edge map reader command for the reader. |
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338 | template <typename Reader, typename Map> |
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339 | GraphReader& addEdgeMap(std::string name, Map& map, |
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340 | const Reader& reader = Reader()) { |
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341 | if (edge_map_readers.find(name) != edge_map_readers.end()) { |
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342 | ErrorMessage msg; |
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343 | msg << "Multiple read rule for edge map: " << name; |
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344 | throw IOParameterError(msg.message()); |
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345 | } |
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346 | edge_map_readers.insert( |
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347 | make_pair(name, new MapReader<Edge, Map, Reader>(map, reader))); |
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348 | return *this; |
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349 | } |
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350 | |
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351 | /// \brief Add a new edge map skipper command for the reader. |
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352 | /// |
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353 | /// Add a new edge map skipper command for the reader. |
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354 | template <typename Reader> |
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355 | GraphReader& skipEdgeMap(std::string name, |
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356 | const Reader& reader = Reader()) { |
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357 | if (edge_map_readers.find(name) != edge_map_readers.end()) { |
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358 | ErrorMessage msg; |
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359 | msg << "Multiple read rule for edge map: " << name; |
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360 | throw IOParameterError(msg.message()); |
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361 | } |
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362 | edge_map_readers.insert( |
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363 | make_pair(name, new SkipReader<Edge, Reader>(reader))); |
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364 | return *this; |
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365 | } |
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366 | |
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367 | /// \brief Add a new labeled node reader for the reader. |
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368 | /// |
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369 | /// Add a new labeled node reader for the reader. |
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370 | GraphReader& addNode(std::string name, Node& node) { |
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371 | if (node_readers.find(name) != node_readers.end()) { |
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372 | ErrorMessage msg; |
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373 | msg << "Multiple read rule for node: " << name; |
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374 | throw IOParameterError(msg.message()); |
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375 | } |
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376 | node_readers.insert(make_pair(name, &node)); |
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377 | return *this; |
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378 | } |
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379 | |
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380 | /// \brief Add a new labeled edge reader for the reader. |
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381 | /// |
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382 | /// Add a new labeled edge reader for the reader. |
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383 | GraphReader& addEdge(std::string name, Edge& edge) { |
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384 | if (edge_readers.find(name) != edge_readers.end()) { |
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385 | ErrorMessage msg; |
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386 | msg << "Multiple read rule for edge: " << name; |
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387 | throw IOParameterError(msg.message()); |
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388 | } |
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389 | edge_readers.insert(make_pair(name, &edge)); |
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390 | return *this; |
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391 | } |
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392 | |
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393 | /// \brief Executes the reader commands. |
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394 | /// |
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395 | /// Executes the reader commands. |
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396 | void run() { |
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397 | int line_num = 0; |
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398 | std::auto_ptr<InverterBase<Node> > nodeInverter; |
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399 | std::auto_ptr<InverterBase<Edge> > edgeInverter; |
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400 | try { |
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401 | std::string line = readNotEmptyLine(is, line_num); |
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402 | if (line.find("@nodeset") == 0) { |
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403 | line = readNodeSet(line_num, nodeInverter); |
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404 | } |
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405 | if (line.find("@edgeset") == 0) { |
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406 | line = readEdgeSet(line_num, edgeInverter, nodeInverter); |
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407 | } |
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408 | if (line.find("@nodes") == 0) { |
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409 | line = readNodes(line_num, nodeInverter); |
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410 | } |
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411 | if (line.find("@edges") == 0) { |
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412 | line = readEdges(line_num, edgeInverter); |
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413 | } |
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414 | if (line.find("@end") != 0) { |
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415 | throw DataFormatError("Invalid control sequence error"); |
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416 | } |
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417 | } catch (DataFormatError e) { |
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418 | e.line(line_num); |
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419 | throw e; |
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420 | } |
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421 | } |
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422 | |
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423 | private: |
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424 | |
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425 | template <typename Item> class InverterBase; |
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426 | |
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427 | std::string readNodeSet(int& line_num, |
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428 | std::auto_ptr<InverterBase<Node> >& nodeInverter) { |
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429 | std::vector<ReaderBase<Node>* > index; |
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430 | { |
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431 | std::string line = readNotEmptyLine(is, line_num); |
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432 | std::string id; |
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433 | std::istringstream ls(line); |
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434 | while (ls >> id) { |
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435 | typename NodeMapReaders::iterator it = node_map_readers.find(id); |
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436 | if (it != node_map_readers.end()) { |
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437 | index.push_back(it->second); |
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438 | node_map_readers.erase(it); |
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439 | } else { |
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440 | index.push_back(&nodeSkipper); |
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441 | } |
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442 | if (ReaderTraits::idMapName(id) && nodeInverter.get() == 0) { |
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443 | nodeInverter.reset(index.back()->getInverter()); |
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444 | index.back() = nodeInverter.get(); |
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445 | } |
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446 | } |
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447 | } |
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448 | |
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449 | // if (index.size() == 0) { |
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450 | // throw DataFormatError("Cannot find node id map"); |
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451 | // } |
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452 | |
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453 | // nodeInverter = |
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454 | // std::auto_ptr<InverterBase<Node> >(index[0]->getInverter()); |
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455 | std::string line; |
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456 | while (line = readNotEmptyLine(is, line_num), line[0] != '@') { |
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457 | Node node = graph.addNode(); |
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458 | std::istringstream ls(line); |
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459 | for (int i = 0; i < (int)index.size(); ++i) { |
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460 | index[i]->read(ls, node); |
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461 | } |
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462 | } |
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463 | return line; |
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464 | } |
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465 | |
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466 | std::string readEdgeSet(int& line_num, |
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467 | std::auto_ptr<InverterBase<Edge> >& edgeInverter, |
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468 | std::auto_ptr<InverterBase<Node> >& nodeInverter) { |
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469 | std::vector<ReaderBase<Edge>*> index; |
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470 | { |
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471 | std::string line = readNotEmptyLine(is, line_num); |
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472 | std::string id; |
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473 | std::istringstream ls(line); |
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474 | while (ls >> id) { |
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475 | typename EdgeMapReaders::iterator it = edge_map_readers.find(id); |
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476 | if (it != edge_map_readers.end()) { |
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477 | index.push_back(it->second); |
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478 | edge_map_readers.erase(it); |
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479 | } else { |
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480 | index.push_back(&edgeSkipper); |
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481 | } |
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482 | if (ReaderTraits::idMapName(id) && edgeInverter.get() == 0) { |
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483 | edgeInverter.reset(index.back()->getInverter()); |
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484 | index.back() = edgeInverter.get(); |
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485 | } |
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486 | } |
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487 | } |
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488 | |
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489 | if (nodeInverter.get() == 0) { |
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490 | throw DataFormatError("Cannot find node id map"); |
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491 | } |
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492 | // if (index.size() == 0) { |
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493 | // throw DataFormatError("Cannot find edge id map"); |
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494 | // } |
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495 | |
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496 | // edgeInverter = |
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497 | // std::auto_ptr<InverterBase<Edge> >(index[0]->getInverter()); |
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498 | std::string line; |
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499 | while (line = readNotEmptyLine(is, line_num), line[0] != '@') { |
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500 | std::istringstream ls(line); |
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501 | Node source = nodeInverter->read(ls); |
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502 | Node target = nodeInverter->read(ls); |
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503 | Edge edge = graph.addEdge(source, target); |
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504 | for (int i = 0; i < (int)index.size(); ++i) { |
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505 | index[i]->read(ls, edge); |
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506 | } |
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507 | } |
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508 | return line; |
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509 | } |
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510 | |
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511 | std::string readNodes(int& line_num, |
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512 | std::auto_ptr<InverterBase<Node> >& nodeInverter) { |
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513 | std::string line; |
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514 | if (nodeInverter.get() == 0) { |
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515 | throw DataFormatError("Cannot find node id map"); |
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516 | } |
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517 | while (line = readNotEmptyLine(is, line_num), line[0] != '@') { |
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518 | std::istringstream ls(line); |
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519 | std::string name; |
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520 | ls >> name; |
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521 | typename NodeReaders::iterator it = node_readers.find(name); |
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522 | if (it != node_readers.end()) { |
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523 | *(it -> second) = nodeInverter->read(ls); |
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524 | } |
---|
525 | } |
---|
526 | return line; |
---|
527 | } |
---|
528 | |
---|
529 | std::string readEdges(int& line_num, |
---|
530 | std::auto_ptr<InverterBase<Edge> >& edgeInverter) { |
---|
531 | std::string line; |
---|
532 | if (edgeInverter.get() == 0) { |
---|
533 | throw DataFormatError("Cannot find edge id map"); |
---|
534 | } |
---|
535 | while (line = readNotEmptyLine(is, line_num), line[0] != '@') { |
---|
536 | std::istringstream ls(line); |
---|
537 | std::string name; |
---|
538 | ls >> name; |
---|
539 | typename EdgeReaders::iterator it = edge_readers.find(name); |
---|
540 | if (it != edge_readers.end()) { |
---|
541 | *(it -> second) = edgeInverter->read(ls); |
---|
542 | } |
---|
543 | } |
---|
544 | return line; |
---|
545 | } |
---|
546 | |
---|
547 | std::string readNotEmptyLine(std::istream& is, int& line_num) { |
---|
548 | std::string line; |
---|
549 | while (++line_num, getline(is, line)) { |
---|
550 | int vi = line.find('#'); |
---|
551 | if (vi != (int)::std::string::npos) { |
---|
552 | line = line.substr(0, vi); |
---|
553 | } |
---|
554 | vi = line.find_first_not_of(" \t"); |
---|
555 | if (vi != (int)std::string::npos) { |
---|
556 | return line.substr(vi); |
---|
557 | } |
---|
558 | } |
---|
559 | throw DataFormatError("End of stream error"); |
---|
560 | } |
---|
561 | |
---|
562 | template <typename _Item> |
---|
563 | class ReaderBase; |
---|
564 | |
---|
565 | template <typename _Item> |
---|
566 | class InverterBase : public ReaderBase<_Item> { |
---|
567 | public: |
---|
568 | typedef _Item Item; |
---|
569 | virtual void read(std::istream&, const Item&) = 0; |
---|
570 | virtual Item read(std::istream&) = 0; |
---|
571 | |
---|
572 | virtual InverterBase<_Item>* getInverter() { |
---|
573 | return this; |
---|
574 | } |
---|
575 | }; |
---|
576 | |
---|
577 | template <typename _Item, typename _Map, typename _Reader> |
---|
578 | class MapReaderInverter : public InverterBase<_Item> { |
---|
579 | public: |
---|
580 | typedef _Item Item; |
---|
581 | typedef _Reader Reader; |
---|
582 | typedef typename Reader::Value Value; |
---|
583 | typedef _Map Map; |
---|
584 | typedef std::map<Value, Item> Inverse; |
---|
585 | |
---|
586 | Map& map; |
---|
587 | Reader reader; |
---|
588 | Inverse inverse; |
---|
589 | |
---|
590 | MapReaderInverter(Map& _map, const Reader& _reader) |
---|
591 | : map(_map), reader(_reader) {} |
---|
592 | |
---|
593 | virtual ~MapReaderInverter() {} |
---|
594 | |
---|
595 | virtual void read(std::istream& is, const Item& item) { |
---|
596 | Value value; |
---|
597 | reader.read(is, value); |
---|
598 | map.set(item, value); |
---|
599 | typename Inverse::iterator it = inverse.find(value); |
---|
600 | if (it == inverse.end()) { |
---|
601 | inverse.insert(std::make_pair(value, item)); |
---|
602 | } else { |
---|
603 | throw DataFormatError("Multiple ID occurence"); |
---|
604 | } |
---|
605 | } |
---|
606 | |
---|
607 | virtual Item read(std::istream& is) { |
---|
608 | Value value; |
---|
609 | reader.read(is, value); |
---|
610 | typename Inverse::const_iterator it = inverse.find(value); |
---|
611 | if (it != inverse.end()) { |
---|
612 | return it->second; |
---|
613 | } else { |
---|
614 | throw DataFormatError("Invalid ID error"); |
---|
615 | } |
---|
616 | } |
---|
617 | }; |
---|
618 | |
---|
619 | template <typename _Item, typename _Reader> |
---|
620 | class SkipReaderInverter : public InverterBase<_Item> { |
---|
621 | public: |
---|
622 | typedef _Item Item; |
---|
623 | typedef _Reader Reader; |
---|
624 | typedef typename Reader::Value Value; |
---|
625 | typedef std::map<Value, Item> Inverse; |
---|
626 | |
---|
627 | Reader reader; |
---|
628 | |
---|
629 | SkipReaderInverter(const Reader& _reader) |
---|
630 | : reader(_reader) {} |
---|
631 | |
---|
632 | virtual ~SkipReaderInverter() {} |
---|
633 | |
---|
634 | virtual void read(std::istream& is, const Item& item) { |
---|
635 | Value value; |
---|
636 | reader.read(is, value); |
---|
637 | typename Inverse::iterator it = inverse.find(value); |
---|
638 | if (it == inverse.end()) { |
---|
639 | inverse.insert(std::make_pair(value, item)); |
---|
640 | } else { |
---|
641 | throw DataFormatError("Multiple ID occurence error"); |
---|
642 | } |
---|
643 | } |
---|
644 | |
---|
645 | virtual Item read(std::istream& is) { |
---|
646 | Value value; |
---|
647 | reader.read(is, value); |
---|
648 | typename Inverse::const_iterator it = inverse.find(value); |
---|
649 | if (it != inverse.end()) { |
---|
650 | return it->second; |
---|
651 | } else { |
---|
652 | throw DataFormatError("Invalid ID error"); |
---|
653 | } |
---|
654 | } |
---|
655 | private: |
---|
656 | Inverse inverse; |
---|
657 | }; |
---|
658 | |
---|
659 | // Readers |
---|
660 | |
---|
661 | template <typename _Item> |
---|
662 | class ReaderBase { |
---|
663 | public: |
---|
664 | typedef _Item Item; |
---|
665 | |
---|
666 | // virtual ~ReaderBase() {} |
---|
667 | |
---|
668 | virtual void read(std::istream& is, const Item& item) = 0; |
---|
669 | virtual InverterBase<_Item>* getInverter() = 0; |
---|
670 | }; |
---|
671 | |
---|
672 | template <typename _Item, typename _Map, typename _Reader> |
---|
673 | class MapReader : public ReaderBase<_Item> { |
---|
674 | public: |
---|
675 | typedef _Map Map; |
---|
676 | typedef _Reader Reader; |
---|
677 | typedef typename Reader::Value Value; |
---|
678 | typedef _Item Item; |
---|
679 | |
---|
680 | Map& map; |
---|
681 | Reader reader; |
---|
682 | |
---|
683 | MapReader(Map& _map, const Reader& _reader) |
---|
684 | : map(_map), reader(_reader) {} |
---|
685 | |
---|
686 | virtual ~MapReader() {} |
---|
687 | |
---|
688 | virtual void read(std::istream& is, const Item& item) { |
---|
689 | Value value; |
---|
690 | reader.read(is, value); |
---|
691 | map.set(item, value); |
---|
692 | } |
---|
693 | |
---|
694 | virtual InverterBase<_Item>* getInverter() { |
---|
695 | return new MapReaderInverter<Item, Map, Reader>(map, reader); |
---|
696 | } |
---|
697 | }; |
---|
698 | |
---|
699 | |
---|
700 | template <typename _Item, typename _Reader> |
---|
701 | class SkipReader : public ReaderBase<_Item> { |
---|
702 | public: |
---|
703 | typedef _Reader Reader; |
---|
704 | typedef typename Reader::Value Value; |
---|
705 | typedef _Item Item; |
---|
706 | |
---|
707 | Reader reader; |
---|
708 | SkipReader(const Reader& _reader) : reader(_reader) {} |
---|
709 | |
---|
710 | virtual ~SkipReader() {} |
---|
711 | |
---|
712 | virtual void read(std::istream& is, const Item&) { |
---|
713 | Value value; |
---|
714 | reader.read(is, value); |
---|
715 | } |
---|
716 | |
---|
717 | virtual InverterBase<Item>* getInverter() { |
---|
718 | return new SkipReaderInverter<Item, Reader>(reader); |
---|
719 | } |
---|
720 | }; |
---|
721 | |
---|
722 | |
---|
723 | typedef std::map<std::string, ReaderBase<Node>*> NodeMapReaders; |
---|
724 | NodeMapReaders node_map_readers; |
---|
725 | |
---|
726 | typedef std::map<std::string, ReaderBase<Edge>*> EdgeMapReaders; |
---|
727 | EdgeMapReaders edge_map_readers; |
---|
728 | |
---|
729 | typedef std::map<std::string, Node*> NodeReaders; |
---|
730 | NodeReaders node_readers; |
---|
731 | |
---|
732 | typedef std::map<std::string, Edge*> EdgeReaders; |
---|
733 | EdgeReaders edge_readers; |
---|
734 | |
---|
735 | std::istream& is; |
---|
736 | Graph& graph; |
---|
737 | |
---|
738 | SkipReader<Node, DefaultReader> nodeSkipper; |
---|
739 | SkipReader<Edge, DefaultReader> edgeSkipper; |
---|
740 | |
---|
741 | }; |
---|
742 | |
---|
743 | /// \brief Read a graph from the input. |
---|
744 | /// |
---|
745 | /// Read a graph from the input. |
---|
746 | /// \param is The input stream. |
---|
747 | /// \param g The graph. |
---|
748 | /// \param capacity The capacity map. |
---|
749 | /// \param s The source node. |
---|
750 | /// \param t The target node. |
---|
751 | /// \param cost The cost map. |
---|
752 | template<typename Graph, typename CapacityMap, typename CostMap> |
---|
753 | void readGraph(std::istream& is, Graph &g, CapacityMap& capacity, |
---|
754 | typename Graph::Node &s, typename Graph::Node &t, |
---|
755 | CostMap& cost) { |
---|
756 | GraphReader<Graph> reader(is, g); |
---|
757 | reader.addEdgeMap("capacity", capacity); |
---|
758 | reader.addEdgeMap("cost", cost); |
---|
759 | reader.addNode("source", s); |
---|
760 | reader.addNode("target", t); |
---|
761 | reader.run(); |
---|
762 | } |
---|
763 | |
---|
764 | /// \brief Read a graph from the input. |
---|
765 | /// |
---|
766 | /// Read a graph from the input. |
---|
767 | /// \param is The input stream. |
---|
768 | /// \param g The graph. |
---|
769 | /// \param capacity The capacity map. |
---|
770 | /// \param s The source node. |
---|
771 | /// \param t The target node. |
---|
772 | template<typename Graph, typename CapacityMap> |
---|
773 | void readGraph(std::istream& is, Graph &g, CapacityMap& capacity, |
---|
774 | typename Graph::Node &s, typename Graph::Node &t) { |
---|
775 | GraphReader<Graph> reader(is, g); |
---|
776 | reader.addEdgeMap("capacity", capacity); |
---|
777 | reader.addNode("source", s); |
---|
778 | reader.addNode("target", t); |
---|
779 | reader.run(); |
---|
780 | } |
---|
781 | |
---|
782 | /// \brief Read a graph from the input. |
---|
783 | /// |
---|
784 | /// Read a graph from the input. |
---|
785 | /// \param is The input stream. |
---|
786 | /// \param g The graph. |
---|
787 | /// \param capacity The capacity map. |
---|
788 | /// \param s The source node. |
---|
789 | template<typename Graph, typename CapacityMap> |
---|
790 | void readGraph(std::istream& is, Graph &g, CapacityMap& capacity, |
---|
791 | typename Graph::Node &s) { |
---|
792 | GraphReader<Graph> reader(is, g); |
---|
793 | reader.addEdgeMap("capacity", capacity); |
---|
794 | reader.addNode("source", s); |
---|
795 | reader.run(); |
---|
796 | } |
---|
797 | |
---|
798 | /// \brief Read a graph from the input. |
---|
799 | /// |
---|
800 | /// Read a graph from the input. |
---|
801 | /// \param is The input stream. |
---|
802 | /// \param g The graph. |
---|
803 | /// \param capacity The capacity map. |
---|
804 | template<typename Graph, typename CapacityMap> |
---|
805 | void readGraph(std::istream& is, Graph &g, CapacityMap& capacity) { |
---|
806 | GraphReader<Graph> reader(is, g); |
---|
807 | reader.addEdgeMap("capacity", capacity); |
---|
808 | reader.run(); |
---|
809 | } |
---|
810 | |
---|
811 | /// \brief Read a graph from the input. |
---|
812 | /// |
---|
813 | /// Read a graph from the input. |
---|
814 | /// \param is The input stream. |
---|
815 | /// \param g The graph. |
---|
816 | template<typename Graph> |
---|
817 | void readGraph(std::istream& is, Graph &g) { |
---|
818 | GraphReader<Graph> reader(is, g); |
---|
819 | reader.run(); |
---|
820 | } |
---|
821 | |
---|
822 | /// @} |
---|
823 | } |
---|
824 | |
---|
825 | #endif |
---|