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# ClpObjective.hpp

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    00001 /* $Id: ClpObjective.hpp 1665 2011-01-04 17:55:54Z lou $ */
    00002 // Copyright (C) 2002, International Business Machines
    00003 // Corporation and others.  All Rights Reserved.
    00004 // This code is licensed under the terms of the Eclipse Public License (EPL).
    00005
    00006 #ifndef ClpObjective_H
    00007 #define ClpObjective_H
    00008
    00009
    00010 //#############################################################################
    00011 class ClpSimplex;
    00012 class ClpModel;
    00013
    00019 class ClpObjective  {
    00020
    00021 public:
    00022
    00024
    00025
    00032      virtual double * gradient(const ClpSimplex * model,
    00033                                const double * solution,
    00034                                double & offset, bool refresh,
    00035                                int includeLinear = 2) = 0;
    00038      virtual double reducedGradient(ClpSimplex * model, double * region,
    00039                                     bool useFeasibleCosts) = 0;
    00046      virtual double stepLength(ClpSimplex * model,
    00047                                const double * solution,
    00048                                const double * change,
    00049                                double maximumTheta,
    00050                                double & currentObj,
    00051                                double & predictedObj,
    00052                                double & thetaObj) = 0;
    00054      virtual double objectiveValue(const ClpSimplex * model, const double * solution) const = 0;
    00056      virtual void resize(int newNumberColumns) = 0;
    00058      virtual void deleteSome(int numberToDelete, const int * which) = 0;
    00060      virtual void reallyScale(const double * columnScale) = 0;
    00064      virtual int markNonlinear(char * which);
    00066      virtual void newXValues() {}
    00068
    00069
    00071
    00072
    00073      ClpObjective();
    00074
    00076      ClpObjective(const ClpObjective &);
    00077
    00079      ClpObjective & operator=(const ClpObjective& rhs);
    00080
    00082      virtual ~ClpObjective ();
    00083
    00085      virtual ClpObjective * clone() const = 0;
    00090      virtual ClpObjective * subsetClone (int numberColumns,
    00091                                          const int * whichColumns) const;
    00092
    00094
    00096
    00097
    00098      inline int type() {
    00099           return type_;
    00100      }
    00102      inline int activated() const {
    00103           return activated_;
    00104      }
    00106      inline void setActivated(int value) {
    00107           activated_ = value;
    00108      }
    00109
    00111      inline double nonlinearOffset () const {
    00112           return offset_;
    00113      }
    00115
    00116      //---------------------------------------------------------------------------
    00117
    00118 protected:
    00120
    00121
    00122      double offset_;
    00124      int type_;
    00126      int activated_;
    00128 };
    00129
    00130 #endif