Osi  0.107.9
OsiPresolve.hpp
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1 // Copyright (C) 2003, International Business Machines
2 // Corporation and others. All Rights Reserved.
3 // This code is licensed under the terms of the Eclipse Public License (EPL).
4 
5 #ifndef OsiPresolve_H
6 #define OsiPresolve_H
7 #include "OsiSolverInterface.hpp"
8 
9 class CoinPresolveAction;
10 #include "CoinPresolveMatrix.hpp"
11 
12 
62 class OsiPresolve {
63 public:
66 
68  virtual ~OsiPresolve();
69 
91  double feasibilityTolerance=0.0,
92  bool keepIntegers=true,
93  int numberPasses=5,
94  const char * prohibited=NULL,
95  bool doStatus=true,
96  const char * rowProhibited=NULL);
97 
115  virtual void postsolve(bool updateStatus=true);
116 
119 
122 
125 
127  const int * originalColumns() const;
128 
130  const int * originalRows() const;
131 
133  inline int getNumRows() const
134  { return nrows_;}
135 
137  inline int getNumCols() const
138  { return ncols_;}
139 
144  inline void setNonLinearValue(double value)
145  { nonLinearValue_ = value;}
146  inline double nonLinearValue() const
147  { return nonLinearValue_;}
166  inline void setPresolveActions(int action)
167  { presolveActions_ = (presolveActions_&0xffff0000)|(action&0xffff);}
168 
169 private:
175 
181 
188 
191 
194 
196  const CoinPresolveAction *paction_;
197 
204  int ncols_;
205 
207  int nrows_;
208 
210  CoinBigIndex nelems_;
211 
220 
221 protected:
230  virtual const CoinPresolveAction *presolve(CoinPresolveMatrix *prob);
231 
242  virtual void postsolve(CoinPostsolveMatrix &prob);
243 
251 };
252 #endif
OsiPresolve::presolveActions_
int presolveActions_
Whether we want to skip dual part of presolve etc.
Definition: OsiPresolve.hpp:217
OsiPresolve::postsolve
virtual void postsolve(CoinPostsolveMatrix &prob)
Reverse presolve transformations to recover the solution to the original problem.
OsiPresolve::OsiPresolve
OsiPresolve()
Default constructor (empty object)
OsiPresolve::nrows_
int nrows_
Number of rows in original model.
Definition: OsiPresolve.hpp:207
OsiPresolve::numberPasses_
int numberPasses_
Number of major passes.
Definition: OsiPresolve.hpp:219
OsiPresolve::getNumRows
int getNumRows() const
Return number of rows in original model.
Definition: OsiPresolve.hpp:133
OsiPresolve::getNumCols
int getNumCols() const
Return number of columns in original model.
Definition: OsiPresolve.hpp:137
OsiPresolve::setPresolveActions
void setPresolveActions(int action)
Fine control over presolve actions.
Definition: OsiPresolve.hpp:166
OsiPresolve::originalColumns
const int * originalColumns() const
Return a pointer to the original columns.
OsiPresolve::originalRow_
int * originalRow_
Original row numbers.
Definition: OsiPresolve.hpp:193
OsiPresolve::gutsOfDestroy
void gutsOfDestroy()
Destroys queued postsolve actions.
OsiPresolve::presolve
virtual const CoinPresolveAction * presolve(CoinPresolveMatrix *prob)
Apply presolve transformations to the problem.
OsiPresolve::presolvedModel_
OsiSolverInterface * presolvedModel_
Presolved model (solver interface loaded with the presolved problem)
Definition: OsiPresolve.hpp:180
OsiPresolve::nelems_
CoinBigIndex nelems_
Number of nonzero matrix coefficients in the original model.
Definition: OsiPresolve.hpp:210
OsiPresolve::presolvedModel
virtual OsiSolverInterface * presolvedModel(OsiSolverInterface &origModel, double feasibilityTolerance=0.0, bool keepIntegers=true, int numberPasses=5, const char *prohibited=NULL, bool doStatus=true, const char *rowProhibited=NULL)
Create a new OsiSolverInterface loaded with the presolved problem.
OsiPresolve::originalModel_
OsiSolverInterface * originalModel_
Original model (solver interface loaded with the original problem).
Definition: OsiPresolve.hpp:174
OsiPresolve::model
OsiSolverInterface * model() const
Return a pointer to the presolved model.
OsiPresolve
OSI interface to COIN problem simplification capabilities.
Definition: OsiPresolve.hpp:62
OsiPresolve::setOriginalModel
void setOriginalModel(OsiSolverInterface *model)
Set the pointer to the original model.
OsiPresolve::originalModel
OsiSolverInterface * originalModel() const
Return a pointer to the original model.
OsiSolverInterface.hpp
OsiPresolve::setNonLinearValue
void setNonLinearValue(double value)
"Magic" number.
Definition: OsiPresolve.hpp:144
OsiPresolve::nonLinearValue
double nonLinearValue() const
Definition: OsiPresolve.hpp:146
OsiPresolve::originalColumn_
int * originalColumn_
Original column numbers.
Definition: OsiPresolve.hpp:190
OsiPresolve::nonLinearValue_
double nonLinearValue_
"Magic" number.
Definition: OsiPresolve.hpp:187
OsiPresolve::originalRows
const int * originalRows() const
Return a pointer to the original rows.
OsiPresolve::~OsiPresolve
virtual ~OsiPresolve()
Virtual destructor.
OsiPresolve::postsolve
virtual void postsolve(bool updateStatus=true)
Restate the solution to the presolved problem in terms of the original problem and load it into the o...
OsiPresolve::ncols_
int ncols_
Number of columns in original model.
Definition: OsiPresolve.hpp:204
OsiPresolve::paction_
const CoinPresolveAction * paction_
The list of transformations applied.
Definition: OsiPresolve.hpp:196
OsiSolverInterface
Abstract Base Class for describing an interface to a solver.
Definition: OsiSolverInterface.hpp:62