AbcDualRowPivot.hpp

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/* $Id$ */
// 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
 
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