ClpObjective.hpp

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/* $Id$ */
// 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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