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/* $Id: ClpConstraintLinear.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 ClpConstraintLinear_H
#define ClpConstraintLinear_H
#include "ClpConstraint.hpp"
//#############################################################################
/** Linear Constraint Class
*/
class ClpConstraintLinear : public ClpConstraint {
public:
///@name Stuff
//@{
/** Fills gradient. If Linear 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 nonlinear columns to 1.
Returns number of nonlinear 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;
//@}
///@name Constructors and destructors
//@{
/// Default Constructor
ClpConstraintLinear();
/// Constructor from constraint
ClpConstraintLinear(int row, int numberCoefficients, int numberColumns,
const int * column, const double * element);
/** Copy constructor .
*/
ClpConstraintLinear(const ClpConstraintLinear & rhs);
/// Assignment operator
ClpConstraintLinear & operator=(const ClpConstraintLinear& rhs);
/// Destructor
virtual ~ClpConstraintLinear ();
/// Clone
virtual ClpConstraint * clone() const;
//@}
///@name Gets and sets
//@{
/// Number of coefficients
virtual int numberCoefficients() const;
/// Number of columns in linear constraint
inline int numberColumns() const {
return numberColumns_;
}
/// Columns
inline const int * column() const {
return column_;
}
/// Coefficients
inline const double * coefficient() const {
return coefficient_;
}
//@}
//---------------------------------------------------------------------------
private:
///@name Private member data
/// Column
int * column_;
/// Coefficients
double * coefficient_;
/// Useful to have number of columns about
int numberColumns_;
/// Number of coefficients
int numberCoefficients_;
//@}
};
#endif
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