1 | // Copyright (C) 2002, International Business Machines |
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2 | // Corporation and others. All Rights Reserved. |
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3 | #ifndef CbcCompareActual_H |
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4 | #define CbcCompareActual_H |
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5 | |
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6 | |
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7 | //############################################################################# |
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8 | /* These are alternative strategies for node traversal. |
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9 | They can take data etc for fine tuning |
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10 | |
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11 | At present the node list is stored as a heap and the "test" |
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12 | comparison function returns true if node y is better than node x. |
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13 | |
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14 | */ |
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15 | #include "CbcNode.hpp" |
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16 | #include "CbcCompareBase.hpp" |
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17 | class CbcModel; |
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18 | // This is default before first solution |
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19 | class CbcCompareDepth : public CbcCompareBase{ |
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20 | public: |
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21 | // Default Constructor |
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22 | CbcCompareDepth () ; |
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23 | |
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24 | ~CbcCompareDepth(); |
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25 | // Copy constructor |
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26 | CbcCompareDepth ( const CbcCompareDepth &rhs); |
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27 | |
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28 | // Assignment operator |
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29 | CbcCompareDepth & operator=( const CbcCompareDepth& rhs); |
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30 | |
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31 | /// Clone |
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32 | virtual CbcCompareBase * clone() const; |
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33 | /// Create C++ lines to get to current state |
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34 | virtual void generateCpp( FILE * fp); |
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35 | |
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36 | // This returns true if the depth of node y is greater than depth of node x |
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37 | virtual bool test (CbcNode * x, CbcNode * y); |
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38 | }; |
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39 | class CbcCompareObjective : public CbcCompareBase { |
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40 | public: |
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41 | // Default Constructor |
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42 | CbcCompareObjective (); |
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43 | |
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44 | virtual ~CbcCompareObjective(); |
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45 | // Copy constructor |
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46 | CbcCompareObjective ( const CbcCompareObjective &rhs); |
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47 | |
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48 | // Assignment operator |
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49 | CbcCompareObjective & operator=( const CbcCompareObjective& rhs); |
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50 | |
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51 | /// Clone |
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52 | virtual CbcCompareBase * clone() const; |
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53 | /// Create C++ lines to get to current state |
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54 | virtual void generateCpp( FILE * fp); |
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55 | |
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56 | /* This returns true if objective value of node y is less than |
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57 | objective value of node x */ |
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58 | virtual bool test (CbcNode * x, CbcNode * y); |
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59 | }; |
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60 | /* This is an example of a more complex rule with data |
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61 | It is default after first solution |
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62 | If weight is 0.0 then it is computed to hit first solution |
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63 | less 2% |
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64 | */ |
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65 | class CbcCompareDefault : public CbcCompareBase { |
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66 | public: |
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67 | // Default Constructor |
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68 | CbcCompareDefault () ; |
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69 | // Constructor with weight |
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70 | CbcCompareDefault (double weight); |
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71 | |
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72 | // Copy constructor |
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73 | CbcCompareDefault ( const CbcCompareDefault &rhs); |
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74 | |
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75 | // Assignment operator |
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76 | CbcCompareDefault & operator=( const CbcCompareDefault& rhs); |
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77 | |
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78 | /// Clone |
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79 | virtual CbcCompareBase * clone() const; |
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80 | /// Create C++ lines to get to current state |
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81 | virtual void generateCpp( FILE * fp); |
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82 | |
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83 | ~CbcCompareDefault() ; |
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84 | /* This returns true if weighted value of node y is less than |
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85 | weighted value of node x */ |
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86 | virtual bool test (CbcNode * x, CbcNode * y) ; |
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87 | // This allows method to change behavior as it is called |
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88 | // after each solution |
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89 | virtual void newSolution(CbcModel * model, |
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90 | double objectiveAtContinuous, |
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91 | int numberInfeasibilitiesAtContinuous) ; |
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92 | // This allows method to change behavior |
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93 | // Return true if want tree re-sorted |
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94 | virtual bool every1000Nodes(CbcModel * model,int numberNodes); |
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95 | |
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96 | /* if weight == -1.0 then fewest infeasibilities (before solution) |
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97 | if -2.0 then do breadth first just for first 1000 nodes |
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98 | if -3.0 then depth first before solution |
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99 | */ |
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100 | inline double getWeight() const |
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101 | { return weight_;} |
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102 | inline void setWeight(double weight) |
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103 | { weight_ = weight;} |
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104 | // Depth above which want to explore first |
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105 | inline void setBreadthDepth(int value) |
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106 | { breadthDepth_ = value;} |
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107 | protected: |
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108 | // Weight for each infeasibility |
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109 | double weight_; |
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110 | // Weight for each infeasibility - computed from solution |
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111 | double saveWeight_; |
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112 | // Number of solutions |
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113 | int numberSolutions_; |
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114 | // Tree size (at last check) |
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115 | int treeSize_; |
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116 | // Depth above which want to explore first |
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117 | int breadthDepth_; |
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118 | }; |
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119 | |
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120 | /* This is when rounding is being done |
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121 | */ |
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122 | class CbcCompareEstimate : public CbcCompareBase { |
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123 | public: |
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124 | // Default Constructor |
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125 | CbcCompareEstimate () ; |
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126 | ~CbcCompareEstimate() ; |
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127 | // Copy constructor |
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128 | CbcCompareEstimate ( const CbcCompareEstimate &rhs); |
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129 | |
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130 | // Assignment operator |
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131 | CbcCompareEstimate & operator=( const CbcCompareEstimate& rhs); |
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132 | |
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133 | /// Clone |
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134 | virtual CbcCompareBase * clone() const; |
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135 | /// Create C++ lines to get to current state |
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136 | virtual void generateCpp( FILE * fp); |
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137 | |
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138 | virtual bool test (CbcNode * x, CbcNode * y) ; |
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139 | }; |
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140 | |
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141 | #endif |
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