1 | /* -*- mode: C++; indent-tabs-mode: nil; -*- |
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2 | * |
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3 | * This file is a part of LEMON, a generic C++ optimization library. |
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4 | * |
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5 | * Copyright (C) 2003-2013 |
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6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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8 | * |
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9 | * Permission to use, modify and distribute this software is granted |
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10 | * provided that this copyright notice appears in all copies. For |
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11 | * precise terms see the accompanying LICENSE file. |
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12 | * |
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13 | * This software is provided "AS IS" with no warranty of any kind, |
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14 | * express or implied, and with no claim as to its suitability for any |
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15 | * purpose. |
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16 | * |
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17 | */ |
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18 | |
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19 | #ifndef LEMON_CPLEX_H |
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20 | #define LEMON_CPLEX_H |
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21 | |
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22 | ///\file |
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23 | ///\brief Header of the LEMON-CPLEX lp solver interface. |
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24 | |
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25 | #include <lemon/lp_base.h> |
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26 | |
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27 | struct cpxenv; |
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28 | struct cpxlp; |
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29 | |
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30 | namespace lemon { |
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31 | |
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32 | /// \brief Reference counted wrapper around cpxenv pointer |
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33 | /// |
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34 | /// The cplex uses environment object which is responsible for |
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35 | /// checking the proper license usage. This class provides a simple |
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36 | /// interface for share the environment object between different |
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37 | /// problems. |
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38 | class CplexEnv { |
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39 | friend class CplexBase; |
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40 | private: |
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41 | cpxenv* _env; |
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42 | mutable int* _cnt; |
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43 | |
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44 | public: |
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45 | |
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46 | /// \brief This exception is thrown when the license check is not |
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47 | /// sufficient |
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48 | class LicenseError : public Exception { |
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49 | friend class CplexEnv; |
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50 | private: |
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51 | |
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52 | LicenseError(int status); |
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53 | char _message[510]; |
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54 | |
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55 | public: |
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56 | |
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57 | /// The short error message |
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58 | virtual const char* what() const throw() { |
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59 | return _message; |
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60 | } |
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61 | }; |
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62 | |
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63 | /// Constructor |
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64 | CplexEnv(); |
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65 | /// Shallow copy constructor |
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66 | CplexEnv(const CplexEnv&); |
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67 | /// Shallow assignement |
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68 | CplexEnv& operator=(const CplexEnv&); |
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69 | /// Destructor |
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70 | virtual ~CplexEnv(); |
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71 | |
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72 | protected: |
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73 | |
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74 | cpxenv* cplexEnv() { return _env; } |
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75 | const cpxenv* cplexEnv() const { return _env; } |
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76 | }; |
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77 | |
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78 | /// \brief Base interface for the CPLEX LP and MIP solver |
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79 | /// |
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80 | /// This class implements the common interface of the CPLEX LP and |
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81 | /// MIP solvers. |
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82 | /// \ingroup lp_group |
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83 | class CplexBase : virtual public LpBase { |
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84 | protected: |
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85 | |
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86 | CplexEnv _env; |
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87 | cpxlp* _prob; |
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88 | |
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89 | CplexBase(); |
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90 | CplexBase(const CplexEnv&); |
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91 | CplexBase(const CplexBase &); |
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92 | virtual ~CplexBase(); |
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93 | |
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94 | virtual int _addCol(); |
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95 | virtual int _addRow(); |
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96 | virtual int _addRow(Value l, ExprIterator b, ExprIterator e, Value u); |
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97 | |
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98 | virtual void _eraseCol(int i); |
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99 | virtual void _eraseRow(int i); |
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100 | |
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101 | virtual void _eraseColId(int i); |
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102 | virtual void _eraseRowId(int i); |
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103 | |
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104 | virtual void _getColName(int col, std::string& name) const; |
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105 | virtual void _setColName(int col, const std::string& name); |
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106 | virtual int _colByName(const std::string& name) const; |
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107 | |
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108 | virtual void _getRowName(int row, std::string& name) const; |
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109 | virtual void _setRowName(int row, const std::string& name); |
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110 | virtual int _rowByName(const std::string& name) const; |
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111 | |
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112 | virtual void _setRowCoeffs(int i, ExprIterator b, ExprIterator e); |
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113 | virtual void _getRowCoeffs(int i, InsertIterator b) const; |
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114 | |
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115 | virtual void _setColCoeffs(int i, ExprIterator b, ExprIterator e); |
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116 | virtual void _getColCoeffs(int i, InsertIterator b) const; |
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117 | |
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118 | virtual void _setCoeff(int row, int col, Value value); |
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119 | virtual Value _getCoeff(int row, int col) const; |
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120 | |
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121 | virtual void _setColLowerBound(int i, Value value); |
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122 | virtual Value _getColLowerBound(int i) const; |
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123 | |
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124 | virtual void _setColUpperBound(int i, Value value); |
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125 | virtual Value _getColUpperBound(int i) const; |
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126 | |
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127 | private: |
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128 | void _set_row_bounds(int i, Value lb, Value ub); |
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129 | protected: |
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130 | |
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131 | virtual void _setRowLowerBound(int i, Value value); |
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132 | virtual Value _getRowLowerBound(int i) const; |
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133 | |
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134 | virtual void _setRowUpperBound(int i, Value value); |
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135 | virtual Value _getRowUpperBound(int i) const; |
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136 | |
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137 | virtual void _setObjCoeffs(ExprIterator b, ExprIterator e); |
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138 | virtual void _getObjCoeffs(InsertIterator b) const; |
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139 | |
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140 | virtual void _setObjCoeff(int i, Value obj_coef); |
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141 | virtual Value _getObjCoeff(int i) const; |
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142 | |
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143 | virtual void _setSense(Sense sense); |
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144 | virtual Sense _getSense() const; |
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145 | |
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146 | virtual void _clear(); |
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147 | |
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148 | virtual void _messageLevel(MessageLevel level); |
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149 | void _applyMessageLevel(); |
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150 | |
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151 | bool _message_enabled; |
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152 | |
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153 | void _write(std::string file, std::string format) const; |
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154 | |
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155 | public: |
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156 | |
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157 | /// Returns the used \c CplexEnv instance |
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158 | const CplexEnv& env() const { return _env; } |
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159 | |
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160 | /// \brief Returns the const cpxenv pointer |
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161 | /// |
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162 | /// \note The cpxenv might be destructed with the solver. |
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163 | const cpxenv* cplexEnv() const { return _env.cplexEnv(); } |
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164 | |
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165 | /// \brief Returns the const cpxenv pointer |
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166 | /// |
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167 | /// \note The cpxenv might be destructed with the solver. |
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168 | cpxenv* cplexEnv() { return _env.cplexEnv(); } |
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169 | |
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170 | /// Returns the cplex problem object |
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171 | cpxlp* cplexLp() { return _prob; } |
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172 | /// Returns the cplex problem object |
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173 | const cpxlp* cplexLp() const { return _prob; } |
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174 | |
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175 | #ifdef DOXYGEN |
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176 | /// Write the problem or the solution to a file in the given format |
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177 | |
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178 | /// This function writes the problem or the solution |
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179 | /// to a file in the given format. |
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180 | /// Trying to write in an unsupported format will trigger |
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181 | /// \ref lemon::LpBase::UnsupportedFormatError "UnsupportedFormatError". |
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182 | /// \param file The file path |
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183 | /// \param format The output file format. |
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184 | /// Supportted formats are "MPS", "LP" and "SOL". |
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185 | void write(std::string file, std::string format = "MPS") const {} |
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186 | #endif |
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187 | |
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188 | }; |
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189 | |
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190 | /// \brief Interface for the CPLEX LP solver |
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191 | /// |
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192 | /// This class implements an interface for the CPLEX LP solver. |
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193 | ///\ingroup lp_group |
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194 | class CplexLp : public LpSolver, public CplexBase { |
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195 | public: |
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196 | /// \e |
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197 | CplexLp(); |
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198 | /// \e |
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199 | CplexLp(const CplexEnv&); |
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200 | /// \e |
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201 | CplexLp(const CplexLp&); |
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202 | /// \e |
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203 | virtual ~CplexLp(); |
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204 | |
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205 | /// \e |
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206 | virtual CplexLp* cloneSolver() const; |
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207 | /// \e |
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208 | virtual CplexLp* newSolver() const; |
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209 | |
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210 | private: |
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211 | |
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212 | // these values cannot retrieved element by element |
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213 | mutable std::vector<int> _col_status; |
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214 | mutable std::vector<int> _row_status; |
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215 | |
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216 | mutable std::vector<Value> _primal_ray; |
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217 | mutable std::vector<Value> _dual_ray; |
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218 | |
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219 | void _clear_temporals(); |
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220 | |
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221 | SolveExitStatus convertStatus(int status); |
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222 | |
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223 | protected: |
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224 | |
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225 | virtual const char* _solverName() const; |
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226 | |
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227 | virtual SolveExitStatus _solve(); |
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228 | virtual Value _getPrimal(int i) const; |
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229 | virtual Value _getDual(int i) const; |
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230 | virtual Value _getPrimalValue() const; |
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231 | |
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232 | virtual VarStatus _getColStatus(int i) const; |
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233 | virtual VarStatus _getRowStatus(int i) const; |
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234 | |
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235 | virtual Value _getPrimalRay(int i) const; |
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236 | virtual Value _getDualRay(int i) const; |
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237 | |
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238 | virtual ProblemType _getPrimalType() const; |
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239 | virtual ProblemType _getDualType() const; |
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240 | |
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241 | public: |
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242 | |
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243 | /// Solve with primal simplex method |
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244 | SolveExitStatus solvePrimal(); |
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245 | |
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246 | /// Solve with dual simplex method |
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247 | SolveExitStatus solveDual(); |
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248 | |
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249 | /// Solve with barrier method |
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250 | SolveExitStatus solveBarrier(); |
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251 | |
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252 | }; |
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253 | |
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254 | /// \brief Interface for the CPLEX MIP solver |
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255 | /// |
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256 | /// This class implements an interface for the CPLEX MIP solver. |
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257 | ///\ingroup lp_group |
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258 | class CplexMip : public MipSolver, public CplexBase { |
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259 | public: |
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260 | /// \e |
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261 | CplexMip(); |
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262 | /// \e |
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263 | CplexMip(const CplexEnv&); |
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264 | /// \e |
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265 | CplexMip(const CplexMip&); |
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266 | /// \e |
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267 | virtual ~CplexMip(); |
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268 | |
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269 | /// \e |
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270 | virtual CplexMip* cloneSolver() const; |
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271 | /// \e |
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272 | virtual CplexMip* newSolver() const; |
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273 | |
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274 | protected: |
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275 | |
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276 | |
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277 | virtual const char* _solverName() const; |
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278 | |
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279 | virtual ColTypes _getColType(int col) const; |
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280 | virtual void _setColType(int col, ColTypes col_type); |
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281 | |
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282 | virtual SolveExitStatus _solve(); |
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283 | virtual ProblemType _getType() const; |
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284 | virtual Value _getSol(int i) const; |
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285 | virtual Value _getSolValue() const; |
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286 | |
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287 | }; |
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288 | |
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289 | } //END OF NAMESPACE LEMON |
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290 | |
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291 | #endif //LEMON_CPLEX_H |
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292 | |
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