AbcDualRowPivot.hpp

Go to the documentation of this file.

/* $Id$ */
// Copyright (C) 2002, International Business Machines
// Corporation and others, Copyright (C) 2012, FasterCoin.  All Rights Reserved.
// This code is licensed under the terms of the Eclipse Public License (EPL).
 
#ifndef AbcDualRowPivot_H
#define AbcDualRowPivot_H
#include "AbcCommon.hpp"
 
class AbcSimplex;
class CoinIndexedVector;
 
//#############################################################################

 
class AbcDualRowPivot {
 
public:


  virtual int pivotRow() = 0;

  virtual double updateWeights1(CoinIndexedVector &input, CoinIndexedVector &updateColumn) = 0;
  virtual void updateWeightsOnly(CoinIndexedVector &input) = 0;
  virtual double updateWeights(CoinIndexedVector &input, CoinIndexedVector &updateColumn) = 0;
  virtual void updateWeights2(CoinIndexedVector &input, CoinIndexedVector &updateColumn) = 0;

  virtual void updatePrimalSolution(CoinIndexedVector &updateColumn,
    double theta)
    = 0;
  virtual void updatePrimalSolutionAndWeights(CoinIndexedVector &weightsVector,
    CoinIndexedVector &updateColumn,
    double theta);
  virtual void saveWeights(AbcSimplex *model, int mode);
  virtual void recomputeInfeasibilities();
  virtual void checkAccuracy();
  virtual void clearArrays();
  virtual bool looksOptimal() const
  {
    return false;
  }




  AbcDualRowPivot();

  AbcDualRowPivot(const AbcDualRowPivot &);

  AbcDualRowPivot &operator=(const AbcDualRowPivot &rhs);

  virtual ~AbcDualRowPivot();

  virtual AbcDualRowPivot *clone(bool copyData = true) const = 0;




  inline AbcSimplex *model()
  {
    return model_;
  }

  inline void setModel(AbcSimplex *newmodel)
  {
    model_ = newmodel;
  }

  inline int type()
  {
    return type_;
  }

 
  //---------------------------------------------------------------------------
 
protected:


  AbcSimplex *model_;
  int type_;
};
#ifndef CLP_DUAL_COLUMN_MULTIPLIER
//#define CLP_DUAL_COLUMN_MULTIPLIER 0.99999
#endif
#endif
 
/* vi: softtabstop=2 shiftwidth=2 expandtab tabstop=2
*/