ClpObjective.hpp

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/* $Id: ClpObjective.hpp 2385 2019-01-06 19:43:06Z unxusr $ */
// 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 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() const
  {
    return type_;
  }
  inline void setType(int value)
  {
    type_ = value;
  }
  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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