ClpDualRowPivot.hpp

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/* $Id: ClpDualRowPivot.hpp 2070 2014-11-18 11:12:54Z forrest $ */
// 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