ClpPrimalColumnPivot.hpp

// Copyright (C) 2002, International Business Machines
// Corporation and others.  All Rights Reserved.
#ifndef ClpPrimalcolumnPivot_H
#define ClpPrimalcolumnPivot_H

class ClpSimplex;
class CoinIndexedVector;

//#############################################################################

class ClpPrimalColumnPivot  {
  
public:
  

  
  virtual int pivotColumn(CoinIndexedVector * updates,
                          CoinIndexedVector * spareRow1,
                          CoinIndexedVector * spareRow2,
                          CoinIndexedVector * spareColumn1,
                          CoinIndexedVector * spareColumn2) = 0;
  
  virtual void updateWeights(CoinIndexedVector * input);
  
  virtual void saveWeights(ClpSimplex * model,int mode)=0;
  virtual int pivotRow(double & way)
  {way=0;return -2;};
  virtual void clearArrays();
  virtual bool looksOptimal() const
  { return false;};
  
  


  ClpPrimalColumnPivot(); 
  
  ClpPrimalColumnPivot(const ClpPrimalColumnPivot &);
  
  ClpPrimalColumnPivot & operator=(const ClpPrimalColumnPivot& rhs);
  
  virtual ~ClpPrimalColumnPivot ();

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



  inline ClpSimplex * model()
  { return model_;};
  
  inline int type()
  { return type_;};

  virtual int numberSprintColumns(int & numberIterations) const;
  virtual void switchOffSprint();
  

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


  ClpSimplex * model_;
  int type_;
};

#endif

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