/home/coin/SVN-release/CoinAll-1.1.0/Clp/src/ClpConstraint.hpp

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// Copyright (C) 2007, International Business Machines
// Corporation and others.  All Rights Reserved.
#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

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