ClpDualRowPivot.hpp

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/* $Id$ */
// Copyright (C) 2002, International Business Machines
// Corporation and others.  All Rights Reserved.
// This code is licensed under the terms of the Eclipse Public License (EPL).
 
#ifndef ClpDualRowPivot_H
#define ClpDualRowPivot_H
 
class ClpSimplex;
class CoinIndexedVector;
 
//#############################################################################
 
class ClpDualRowPivot {
 
public:
 
 
  virtual int pivotRow() = 0;
 
  virtual double updateWeights(CoinIndexedVector *input,
    CoinIndexedVector *spare,
    CoinIndexedVector *spare2,
    CoinIndexedVector *updatedColumn)
    = 0;
 
  /* FIXME: this was pure virtul (=0). Why? */
  virtual void updatePrimalSolution(CoinIndexedVector *input,
    double theta,
    double &changeInObjective)
    = 0;
  virtual void saveWeights(ClpSimplex *model, int mode);
  virtual void checkAccuracy();
  virtual void unrollWeights();
  virtual void clearArrays();
  virtual bool looksOptimal() const
  {
    return false;
  }
  virtual void maximumPivotsChanged() {}
 
 
  ClpDualRowPivot();
 
  ClpDualRowPivot(const ClpDualRowPivot &);
 
  ClpDualRowPivot &operator=(const ClpDualRowPivot &rhs);
 
  virtual ~ClpDualRowPivot();
 
  virtual ClpDualRowPivot *clone(bool copyData = true) const = 0;
 
 
 
  inline ClpSimplex *model()
  {
    return model_;
  }
 
  inline void setModel(ClpSimplex *newmodel)
  {
    model_ = newmodel;
  }
 
  inline int type()
  {
    return type_;
  }
 
 
  //---------------------------------------------------------------------------
 
protected:
 
  ClpSimplex *model_;
  int type_;
};
#ifndef CLP_DUAL_COLUMN_MULTIPLIER
//#define CLP_DUAL_COLUMN_MULTIPLIER 0.99999
#endif
#endif
 
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