AbcDualRowPivot.hpp

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/* $Id: AbcDualRowPivot.hpp 1910 2013-01-27 02:00:13Z stefan $ */
// 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