ClpConstraint.hpp

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/* $Id$ */
// 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
 
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