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CbcBranchToFixLots.hpp
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1 // $Id: CbcBranchToFixLots.hpp 1899 2013-04-09 18:12:08Z stefan $
2 // Copyright (C) 2004, International Business Machines
3 // Corporation and others. All Rights Reserved.
4 // This code is licensed under the terms of the Eclipse Public License (EPL).
5 
6 // Edwin 11/13/2009-- carved out of CbcBranchCut
7 
8 #ifndef CbcBranchToFixLots_H
9 #define CbcBranchToFixLots_H
10 
11 #include "CbcBranchCut.hpp"
12 #include "CbcBranchBase.hpp"
13 #include "OsiRowCut.hpp"
14 #include "CoinPackedMatrix.hpp"
15 
24 
25 public:
26 
27  // Default Constructor
29 
36  CbcBranchToFixLots (CbcModel * model, double djTolerance,
37  double fractionFixed, int depth,
38  int numberClean = 0,
39  const char * mark = NULL,
40  bool alwaysCreate = false);
41 
42  // Copy constructor
44 
46  virtual CbcObject * clone() const;
47 
48  // Assignment operator
50 
51  // Destructor
53 
58  int shallWe() const;
59 
61  virtual double infeasibility(const OsiBranchingInformation * info,
62  int &preferredWay) const;
65  virtual bool canDoHeuristics() const {
66  return true;
67  }
68 
70  virtual CbcBranchingObject * createCbcBranch(OsiSolverInterface * solver, const OsiBranchingInformation * info, int way) ;
72  virtual void redoSequenceEtc(CbcModel * model, int numberColumns, const int * originalColumns);
73 
74 
75 protected:
77 
79  double djTolerance_;
83  char * mark_;
87  int depth_;
92 };
93 #endif
94 
int depth_
Do if depth multiple of this.
CbcBranchToFixLots & operator=(const CbcBranchToFixLots &rhs)
virtual bool canDoHeuristics() const
Return true if object can take part in normal heuristics.
Define a cut branching class.
bool alwaysCreate_
If true then always create branch.
int preferredWay() const
If -1 down always chosen first, +1 up always, 0 normal.
Definition: CbcObject.hpp:245
Abstract Base Class for describing an interface to a solver.
double fractionFixed_
We only need to make sure this fraction fixed.
int shallWe() const
Does a lot of the work, Returns 0 if no good, 1 if dj, 2 if clean, 3 if both FIXME: should use enum o...
int numberClean_
number of ==1 rows which need to be clean
virtual CbcBranchingObject * createCbcBranch(OsiSolverInterface *solver, const OsiBranchingInformation *info, int way)
Creates a branching object.
double infeasibility() const
Return infeasibility.
CoinPackedMatrix matrixByRow_
Matrix by row.
virtual CbcObject * clone() const
Clone.
CbcModel * model() const
Return model.
Definition: CbcObject.hpp:240
Abstract branching object base class Now just difference with OsiBranchingObject. ...
Define a branch class that branches so that one way variables are fixed while the other way cuts off ...
char * mark_
Never fix ones marked here.
Sparse Matrix Base Class.
Simple Branch and bound class.
Definition: CbcModel.hpp:101
virtual void redoSequenceEtc(CbcModel *model, int numberColumns, const int *originalColumns)
Redoes data when sequence numbers change.