OsiPresolve.hpp

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// Copyright (C) 2003, International Business Machines
// Corporation and others.  All Rights Reserved.
// This code is licensed under the terms of the Eclipse Public License (EPL).
 
#ifndef OsiPresolve_H
#define OsiPresolve_H
#include "OsiSolverInterface.hpp"
 
class CoinPresolveAction;
#include "CoinPresolveMatrix.hpp"

 
class OsiPresolve {
public:
  OsiPresolve();

  virtual ~OsiPresolve();

  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);

  virtual void postsolve(bool updateStatus = true);

  OsiSolverInterface *model() const;

  OsiSolverInterface *originalModel() const;

  void setOriginalModel(OsiSolverInterface *model);

  const int *originalColumns() const;

  const int *originalRows() const;

  inline int getNumRows() const
  {
    return nrows_;
  }

  inline int getNumCols() const
  {
    return ncols_;
  }

  inline void setNonLinearValue(double value)
  {
    nonLinearValue_ = value;
  }
  inline double nonLinearValue() const
  {
    return nonLinearValue_;
  }

  inline void setPresolveActions(int action)
  {
    presolveActions_ = (presolveActions_ & 0xffff0000) | (action & 0xffff);
  }
  inline OsiSolverInterface *presolvedModel() const
  {
    return presolvedModel_;
  }
  inline void setPresolvedModel(OsiSolverInterface *presolvedModel)
  {
    presolvedModel_ = presolvedModel;
  }
 
private:
  OsiSolverInterface *originalModel_;

  OsiSolverInterface *presolvedModel_;

  double nonLinearValue_;

  int *originalColumn_;

  int *originalRow_;

  const CoinPresolveAction *paction_;

  int ncols_;

  int nrows_;

  CoinBigIndex nelems_;

  int presolveActions_;
  int numberPasses_;
 
protected:
  virtual const CoinPresolveAction *presolve(CoinPresolveMatrix *prob);

  virtual void postsolve(CoinPostsolveMatrix &prob);

  void gutsOfDestroy();
};
#endif
 
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