ClpConstraint.hpp

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/* $Id: ClpConstraint.hpp 1665 2011-01-04 17:55:54Z lou $ */
// Copyright (C) 2007, International Business Machines
// Corporation and others.  All Rights Reserved.
// This code is licensed under the terms of the Eclipse Public License (EPL).

#ifndef ClpConstraint_H
#define ClpConstraint_H


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

class ClpConstraint  {

public:



     virtual int gradient(const ClpSimplex * model,
                          const double * solution,
                          double * gradient,
                          double & functionValue ,
                          double & offset,
                          bool useScaling = false,
                          bool refresh = true) const = 0;
     virtual double functionValue (const ClpSimplex * model,
                                   const double * solution,
                                   bool useScaling = false,
                                   bool refresh = true) const ;
     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) const = 0;
     virtual int markNonzero(char * which) const = 0;



     ClpConstraint();

     ClpConstraint(const ClpConstraint &);

     ClpConstraint & operator=(const ClpConstraint& rhs);

     virtual ~ClpConstraint ();

     virtual ClpConstraint * clone() const = 0;



     inline int type() {
          return type_;
     }
     inline int rowNumber() const {
          return rowNumber_;
     }

     virtual int numberCoefficients() const = 0;

     inline double functionValue () const {
          return functionValue_;
     }

     inline double offset () const {
          return offset_;
     }
     virtual void newXValues() {}

     //---------------------------------------------------------------------------

protected:

     mutable double * lastGradient_;
     mutable double functionValue_;
     mutable double offset_;
     int type_;
     int rowNumber_;
};

#endif