1 | // Edwin 11/9/2009-- carved out of CbcBranchActual |
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2 | /** Define an n-way class for variables. |
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3 | Only valid value is one at UB others at LB |
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4 | Normally 0-1 |
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5 | */ |
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6 | #ifndef CbcNWay_H |
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7 | #define CbcNWay_H |
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8 | |
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9 | class CbcNWay : public CbcObject { |
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10 | |
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11 | public: |
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12 | |
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13 | // Default Constructor |
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14 | CbcNWay (); |
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15 | |
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16 | /** Useful constructor (which are matrix indices) |
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17 | */ |
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18 | CbcNWay (CbcModel * model, int numberMembers, |
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19 | const int * which, int identifier); |
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20 | |
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21 | // Copy constructor |
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22 | CbcNWay ( const CbcNWay &); |
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23 | |
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24 | /// Clone |
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25 | virtual CbcObject * clone() const; |
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26 | |
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27 | /// Assignment operator |
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28 | CbcNWay & operator=( const CbcNWay& rhs); |
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29 | |
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30 | /// Destructor |
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31 | virtual ~CbcNWay (); |
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32 | |
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33 | /// Set up a consequence for a single member |
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34 | void setConsequence(int iColumn, const CbcConsequence & consequence); |
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35 | |
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36 | /// Applies a consequence for a single member |
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37 | void applyConsequence(int iSequence, int state) const; |
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38 | |
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39 | /// Infeasibility - large is 0.5 (and 0.5 will give this) |
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40 | virtual double infeasibility(const OsiBranchingInformation * info, |
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41 | int &preferredWay) const; |
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42 | |
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43 | using CbcObject::feasibleRegion ; |
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44 | /// This looks at solution and sets bounds to contain solution |
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45 | virtual void feasibleRegion(); |
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46 | |
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47 | /// Creates a branching object |
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48 | virtual CbcBranchingObject * createCbcBranch(OsiSolverInterface * solver, const OsiBranchingInformation * info, int way) ; |
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49 | |
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50 | /// Number of members |
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51 | inline int numberMembers() const { |
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52 | return numberMembers_; |
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53 | } |
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54 | |
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55 | /// Members (indices in range 0 ... numberColumns-1) |
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56 | inline const int * members() const { |
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57 | return members_; |
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58 | } |
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59 | /// Redoes data when sequence numbers change |
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60 | virtual void redoSequenceEtc(CbcModel * model, int numberColumns, const int * originalColumns); |
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61 | |
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62 | protected: |
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63 | /// data |
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64 | /// Number of members |
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65 | int numberMembers_; |
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66 | |
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67 | /// Members (indices in range 0 ... numberColumns-1) |
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68 | int * members_; |
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69 | /// Consequences (normally NULL) |
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70 | CbcConsequence ** consequence_; |
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71 | }; |
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72 | /** N way branching Object class. |
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73 | Variable is number of set. |
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74 | */ |
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75 | class CbcNWayBranchingObject : public CbcBranchingObject { |
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76 | |
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77 | public: |
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78 | |
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79 | // Default Constructor |
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80 | CbcNWayBranchingObject (); |
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81 | |
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82 | /** Useful constructor - order had matrix indices |
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83 | way_ -1 corresponds to setting first, +1 to second, +3 etc. |
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84 | this is so -1 and +1 have similarity to normal |
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85 | */ |
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86 | CbcNWayBranchingObject (CbcModel * model, const CbcNWay * nway, |
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87 | int numberBranches, const int * order); |
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88 | |
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89 | // Copy constructor |
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90 | CbcNWayBranchingObject ( const CbcNWayBranchingObject &); |
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91 | |
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92 | // Assignment operator |
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93 | CbcNWayBranchingObject & operator=( const CbcNWayBranchingObject& rhs); |
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94 | |
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95 | /// Clone |
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96 | virtual CbcBranchingObject * clone() const; |
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97 | |
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98 | // Destructor |
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99 | virtual ~CbcNWayBranchingObject (); |
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100 | |
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101 | using CbcBranchingObject::branch ; |
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102 | /// Does next branch and updates state |
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103 | virtual double branch(); |
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104 | |
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105 | #ifdef JJF_ZERO |
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106 | // FIXME: what do we need to do here? |
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107 | /** Reset every information so that the branching object appears to point to |
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108 | the previous child. This method does not need to modify anything in any |
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109 | solver. */ |
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110 | virtual void previousBranch(); |
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111 | #endif |
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112 | |
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113 | using CbcBranchingObject::print ; |
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114 | /** \brief Print something about branch - only if log level high |
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115 | */ |
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116 | virtual void print(); |
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117 | /** The number of branch arms created for this branching object |
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118 | */ |
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119 | virtual int numberBranches() const { |
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120 | return numberInSet_; |
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121 | } |
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122 | /// Is this a two way object (-1 down, +1 up) |
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123 | virtual bool twoWay() const { |
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124 | return false; |
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125 | } |
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126 | |
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127 | /** Return the type (an integer identifier) of \c this */ |
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128 | virtual CbcBranchObjType type() const { |
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129 | return NWayBranchObj; |
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130 | } |
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131 | |
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132 | /** Compare the original object of \c this with the original object of \c |
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133 | brObj. Assumes that there is an ordering of the original objects. |
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134 | This method should be invoked only if \c this and brObj are of the same |
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135 | type. |
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136 | Return negative/0/positive depending on whether \c this is |
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137 | smaller/same/larger than the argument. |
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138 | */ |
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139 | virtual int compareOriginalObject(const CbcBranchingObject* brObj) const; |
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140 | |
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141 | /** Compare the \c this with \c brObj. \c this and \c brObj must be os the |
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142 | same type and must have the same original object, but they may have |
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143 | different feasible regions. |
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144 | Return the appropriate CbcRangeCompare value (first argument being the |
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145 | sub/superset if that's the case). In case of overlap (and if \c |
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146 | replaceIfOverlap is true) replace the current branching object with one |
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147 | whose feasible region is the overlap. |
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148 | */ |
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149 | virtual CbcRangeCompare compareBranchingObject |
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150 | (const CbcBranchingObject* brObj, const bool replaceIfOverlap = false); |
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151 | |
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152 | private: |
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153 | /// order of branching - points back to CbcNWay |
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154 | int * order_; |
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155 | /// Points back to object |
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156 | const CbcNWay * object_; |
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157 | /// Number in set |
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158 | int numberInSet_; |
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159 | }; |
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160 | #endif |
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