1 | // $Id: CbcObject.cpp 1899 2013-04-09 18:12:08Z stefan $ |
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2 | // Copyright (C) 2002, International Business Machines |
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3 | // Corporation and others. All Rights Reserved. |
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4 | // This code is licensed under the terms of the Eclipse Public License (EPL). |
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5 | |
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6 | // Edwin 11/12/2009 carved from CbcBranchBase |
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7 | |
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8 | #if defined(_MSC_VER) |
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9 | // Turn off compiler warning about long names |
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10 | # pragma warning(disable:4786) |
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11 | #endif |
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12 | #include <cassert> |
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13 | #include <cstdlib> |
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14 | #include <cmath> |
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15 | #include <cfloat> |
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16 | |
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17 | #include "OsiSolverInterface.hpp" |
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18 | #include "OsiSolverBranch.hpp" |
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19 | #include "OsiChooseVariable.hpp" |
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20 | #include "CbcModel.hpp" |
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21 | #include "CbcMessage.hpp" |
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22 | #include "CbcBranchBase.hpp" |
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23 | |
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24 | |
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25 | // Default Constructor |
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26 | CbcObject::CbcObject() |
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27 | : OsiObject(), |
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28 | model_(NULL), |
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29 | id_(-1), |
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30 | position_(-1), |
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31 | preferredWay_(0) |
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32 | { |
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33 | } |
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34 | |
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35 | // Constructor from model |
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36 | CbcObject::CbcObject(CbcModel * model) |
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37 | : OsiObject(), |
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38 | model_(model), |
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39 | id_(-1), |
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40 | position_(-1), |
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41 | preferredWay_(0) |
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42 | { |
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43 | } |
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44 | |
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45 | |
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46 | // Destructor |
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47 | CbcObject::~CbcObject () |
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48 | { |
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49 | } |
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50 | |
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51 | // Copy constructor |
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52 | CbcObject::CbcObject ( const CbcObject & rhs) |
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53 | : OsiObject(rhs) |
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54 | { |
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55 | model_ = rhs.model_; |
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56 | id_ = rhs.id_; |
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57 | position_ = rhs.position_; |
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58 | preferredWay_ = rhs.preferredWay_; |
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59 | } |
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60 | |
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61 | // Assignment operator |
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62 | CbcObject & |
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63 | CbcObject::operator=( const CbcObject & rhs) |
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64 | { |
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65 | if (this != &rhs) { |
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66 | OsiObject::operator=(rhs); |
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67 | model_ = rhs.model_; |
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68 | id_ = rhs.id_; |
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69 | position_ = rhs.position_; |
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70 | preferredWay_ = rhs.preferredWay_; |
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71 | } |
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72 | return *this; |
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73 | } |
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74 | |
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75 | /* Returns floor and ceiling i.e. closest valid points |
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76 | */ |
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77 | void |
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78 | CbcObject::floorCeiling(double & floorValue, double & ceilingValue, double value, |
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79 | double tolerance) const |
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80 | { |
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81 | if (fabs(floor(value + 0.5) - value) > tolerance) { |
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82 | floorValue = floor(value); |
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83 | } else { |
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84 | floorValue = floor(value + 0.5); |
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85 | } |
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86 | ceilingValue = floorValue + 1.0; |
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87 | } |
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88 | /* For the variable(s) referenced by the object, |
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89 | look at the current solution and set bounds to match the solution. |
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90 | Returns measure of how much it had to move solution to make feasible |
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91 | */ |
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92 | double |
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93 | CbcObject::feasibleRegion(OsiSolverInterface * /*solver*/) const |
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94 | { |
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95 | //assert (solver==model_->solver()); |
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96 | CbcObject * fudge = const_cast<CbcObject *>(this); |
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97 | fudge->feasibleRegion(); |
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98 | return 0.0; |
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99 | } |
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100 | |
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101 | /* For the variable(s) referenced by the object, |
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102 | look at the current solution and set bounds to match the solution. |
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103 | Returns measure of how much it had to move solution to make feasible |
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104 | */ |
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105 | double |
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106 | CbcObject::feasibleRegion(OsiSolverInterface * /*solver*/, |
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107 | const OsiBranchingInformation * /*info*/) const |
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108 | { |
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109 | //assert (solver==model_->solver()); |
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110 | CbcObject * fudge = const_cast<CbcObject *>(this); |
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111 | fudge->feasibleRegion(); |
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112 | return 0.0; |
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113 | } |
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114 | /* Create a branching object and indicate which way to branch first. |
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115 | |
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116 | The branching object has to know how to create branches (fix |
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117 | variables, etc.) |
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118 | */ |
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119 | OsiBranchingObject * |
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120 | CbcObject::createOsiBranch(OsiSolverInterface * solver, |
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121 | const OsiBranchingInformation * info, |
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122 | int way) const |
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123 | { |
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124 | //assert (solver==model_->solver()); |
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125 | CbcObject * fudge = const_cast<CbcObject *>(this); |
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126 | return fudge->createBranch(solver, info, way); |
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127 | } |
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128 | /* Create an OsiSolverBranch object |
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129 | |
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130 | This returns NULL if branch not represented by bound changes |
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131 | */ |
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132 | OsiSolverBranch * |
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133 | CbcObject::solverBranch() const |
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134 | { |
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135 | return NULL; |
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136 | } |
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137 | /* Pass in information on branch just done and create CbcObjectUpdateData instance. |
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138 | If object does not need data then backward pointer will be NULL. |
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139 | Assumes can get information from solver */ |
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140 | CbcObjectUpdateData |
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141 | CbcObject::createUpdateInformation(const OsiSolverInterface * /*solver*/, |
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142 | const CbcNode * /*node*/, |
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143 | const CbcBranchingObject * /*branchingObject*/) |
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144 | { |
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145 | return CbcObjectUpdateData(); |
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146 | } |
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147 | |
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