1 | // Edwin 11/10/2009-- carved out of CbcBranchActual |
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2 | #ifndef CbcNWayBranchingObject_H |
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3 | #define CbcNWayBranchingObject_H |
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4 | |
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5 | #include "CbcBranchBase.hpp" |
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6 | #include "CbcNWay.hpp" |
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7 | /** N way branching Object class. |
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8 | Variable is number of set. |
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9 | */ |
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10 | class CbcNWayBranchingObject : public CbcBranchingObject { |
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11 | |
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12 | public: |
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13 | |
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14 | // Default Constructor |
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15 | CbcNWayBranchingObject (); |
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16 | |
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17 | /** Useful constructor - order had matrix indices |
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18 | way_ -1 corresponds to setting first, +1 to second, +3 etc. |
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19 | this is so -1 and +1 have similarity to normal |
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20 | */ |
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21 | CbcNWayBranchingObject (CbcModel * model, const CbcNWay * nway, |
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22 | int numberBranches, const int * order); |
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23 | |
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24 | // Copy constructor |
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25 | CbcNWayBranchingObject ( const CbcNWayBranchingObject &); |
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26 | |
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27 | // Assignment operator |
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28 | CbcNWayBranchingObject & operator=( const CbcNWayBranchingObject& rhs); |
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29 | |
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30 | /// Clone |
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31 | virtual CbcBranchingObject * clone() const; |
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32 | |
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33 | // Destructor |
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34 | virtual ~CbcNWayBranchingObject (); |
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35 | |
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36 | using CbcBranchingObject::branch ; |
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37 | /// Does next branch and updates state |
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38 | virtual double branch(); |
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39 | |
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40 | #if 0 |
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41 | // FIXME: what do we need to do here? |
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42 | /** Reset every information so that the branching object appears to point to |
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43 | the previous child. This method does not need to modify anything in any |
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44 | solver. */ |
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45 | virtual void previousBranch(); |
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46 | #endif |
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47 | |
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48 | using CbcBranchingObject::print ; |
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49 | /** \brief Print something about branch - only if log level high |
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50 | */ |
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51 | virtual void print(); |
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52 | /** The number of branch arms created for this branching object |
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53 | */ |
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54 | virtual int numberBranches() const { |
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55 | return numberInSet_; |
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56 | } |
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57 | /// Is this a two way object (-1 down, +1 up) |
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58 | virtual bool twoWay() const { |
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59 | return false; |
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60 | } |
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61 | |
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62 | /** Return the type (an integer identifier) of \c this */ |
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63 | virtual int type() const { |
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64 | return 105; |
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65 | } |
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66 | |
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67 | /** Compare the original object of \c this with the original object of \c |
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68 | brObj. Assumes that there is an ordering of the original objects. |
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69 | This method should be invoked only if \c this and brObj are of the same |
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70 | type. |
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71 | Return negative/0/positive depending on whether \c this is |
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72 | smaller/same/larger than the argument. |
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73 | */ |
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74 | virtual int compareOriginalObject(const CbcBranchingObject* brObj) const; |
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75 | |
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76 | /** Compare the \c this with \c brObj. \c this and \c brObj must be os the |
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77 | same type and must have the same original object, but they may have |
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78 | different feasible regions. |
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79 | Return the appropriate CbcRangeCompare value (first argument being the |
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80 | sub/superset if that's the case). In case of overlap (and if \c |
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81 | replaceIfOverlap is true) replace the current branching object with one |
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82 | whose feasible region is the overlap. |
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83 | */ |
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84 | virtual CbcRangeCompare compareBranchingObject |
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85 | (const CbcBranchingObject* brObj, const bool replaceIfOverlap = false); |
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86 | |
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87 | private: |
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88 | /// order of branching - points back to CbcNWay |
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89 | int * order_; |
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90 | /// Points back to object |
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91 | const CbcNWay * object_; |
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92 | /// Number in set |
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93 | int numberInSet_; |
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94 | }; |
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95 | |
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96 | #endif |
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