/home/coin/SVN-release/CoinAll-1.1.0/Clp/src/ClpObjective.hpp

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


//#############################################################################
class ClpSimplex;
class ClpModel;

class ClpObjective  {
  
public:
  

  
  virtual double * gradient(const ClpSimplex * model,
                            const double * solution,
                            double & offset,bool refresh,
                            int includeLinear=2)=0;
  virtual double reducedGradient(ClpSimplex * model, double * region,
                                 bool useFeasibleCosts)=0;
  virtual double stepLength(ClpSimplex * model,
                            const double * solution,
                            const double * change,
                            double maximumTheta,
                            double & currentObj,
                            double & predictedObj,
                            double & thetaObj)=0;
  virtual double objectiveValue(const ClpSimplex * model, const double * solution) const = 0;
  virtual void resize(int newNumberColumns) = 0; 
  virtual void deleteSome(int numberToDelete, const int * which) = 0; 
  virtual void reallyScale(const double * columnScale) =0;
  virtual int markNonlinear(char * which);
  virtual void newXValues() {}
  
  


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

  virtual ClpObjective * clone() const = 0;
  virtual ClpObjective * subsetClone (int numberColumns, 
                                      const int * whichColumns) const;
 



  inline int type()
  { return type_;}
  inline int activated() const
  {return activated_;}
  inline void setActivated(int value)
  {activated_=value;}
  
  inline double nonlinearOffset () const
  { return offset_;}

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


  double offset_;
  int type_;
  int activated_;
};

#endif

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