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/* $Id: ClpConstraintAmpl.hpp 1899 2013-04-09 18:12:08Z stefan $ */
// 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 ClpConstraintAmpl_H
#define ClpConstraintAmpl_H
#include "ClpConstraint.hpp"
//#############################################################################
/** Ampl Constraint Class
*/
class ClpConstraintAmpl : public ClpConstraint {
public:
///@name Stuff
//@{
/** Fills gradient. If Ampl then solution may be NULL,
also returns true value of function and offset so we can use x not deltaX in constraint
If refresh is false then uses last solution
Uses model for scaling
Returns non-zero if gradient udefined at current solution
*/
virtual int gradient(const ClpSimplex * model,
const double * solution,
double * gradient,
double & functionValue ,
double & offset,
bool useScaling = false,
bool refresh = true) const ;
/// Resize constraint
virtual void resize(int newNumberColumns) ;
/// Delete columns in constraint
virtual void deleteSome(int numberToDelete, const int * which) ;
/// Scale constraint
virtual void reallyScale(const double * columnScale) ;
/** Given a zeroed array sets nonampl columns to 1.
Returns number of nonampl columns
*/
virtual int markNonlinear(char * which) const ;
/** Given a zeroed array sets possible nonzero coefficients to 1.
Returns number of nonzeros
*/
virtual int markNonzero(char * which) const;
/// Say we have new primal solution - so may need to recompute
virtual void newXValues() ;
//@}
///@name Constructors and destructors
//@{
/// Default Constructor
ClpConstraintAmpl();
/// Constructor from ampl
ClpConstraintAmpl(int row, void * amplInfo);
/** Copy constructor .
*/
ClpConstraintAmpl(const ClpConstraintAmpl & rhs);
/// Assignment operator
ClpConstraintAmpl & operator=(const ClpConstraintAmpl& rhs);
/// Destructor
virtual ~ClpConstraintAmpl ();
/// Clone
virtual ClpConstraint * clone() const;
//@}
///@name Gets and sets
//@{
/// Number of coefficients
virtual int numberCoefficients() const;
/// Columns
inline const int * column() const {
return column_;
}
/// Coefficients
inline const double * coefficient() const {
return coefficient_;
}
//@}
//---------------------------------------------------------------------------
private:
///@name Private member data
/// Ampl info
void * amplInfo_;
/// Column
int * column_;
/// Coefficients
double * coefficient_;
/// Number of coefficients in gradient
int numberCoefficients_;
//@}
};
#endif
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