ClpObjective.hpp

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/* $Id: ClpObjective.hpp 1825 2011-11-20 16:02:57Z 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 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