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+/* $Id: ClpLinearObjective.hpp 1665 2011-01-04 17:55:54Z lou $ */
+// Copyright (C) 2003, International Business Machines
+// Corporation and others. All Rights Reserved.
+// This code is licensed under the terms of the Eclipse Public License (EPL).
+
+#ifndef ClpLinearObjective_H
+#define ClpLinearObjective_H
+
+#include "ClpObjective.hpp"
+
+//#############################################################################
+
+/** Linear Objective Class
+
+*/
+
+class ClpLinearObjective : public ClpObjective {
+
+public:
+
+ ///@name Stuff
+ //@{
+
+ /** Returns objective coefficients.
+
+ Offset is always set to 0.0. All other parameters unused.
+ */
+ virtual double * gradient(const ClpSimplex * model,
+ const double * solution, double & offset, bool refresh,
+ int includeLinear = 2);
+ /** Returns reduced gradient.Returns an offset (to be added to current one).
+ */
+ virtual double reducedGradient(ClpSimplex * model, double * region,
+ bool useFeasibleCosts);
+ /** Returns step length which gives minimum of objective for
+ solution + theta * change vector up to maximum theta.
+
+ arrays are numberColumns+numberRows
+ Also sets current objective, predicted and at maximumTheta
+ */
+ virtual double stepLength(ClpSimplex * model,
+ const double * solution,
+ const double * change,
+ double maximumTheta,
+ double & currentObj,
+ double & predictedObj,
+ double & thetaObj);
+ /// Return objective value (without any ClpModel offset) (model may be NULL)
+ virtual double objectiveValue(const ClpSimplex * model, const double * solution) const ;
+ /// Resize objective
+ virtual void resize(int newNumberColumns) ;
+ /// Delete columns in objective
+ virtual void deleteSome(int numberToDelete, const int * which) ;
+ /// Scale objective
+ virtual void reallyScale(const double * columnScale) ;
+
+ //@}
+
+
+ ///@name Constructors and destructors
+ //@{
+ /// Default Constructor
+ ClpLinearObjective();
+
+ /// Constructor from objective
+ ClpLinearObjective(const double * objective, int numberColumns);
+
+ /// Copy constructor
+ ClpLinearObjective(const ClpLinearObjective &);
+ /** Subset constructor. Duplicates are allowed
+ and order is as given.
+ */
+ ClpLinearObjective (const ClpLinearObjective &rhs, int numberColumns,
+ const int * whichColumns) ;
+
+ /// Assignment operator
+ ClpLinearObjective & operator=(const ClpLinearObjective& rhs);
+
+ /// Destructor
+ virtual ~ClpLinearObjective ();
+
+ /// Clone
+ virtual ClpObjective * clone() const;
+ /** Subset clone. Duplicates are allowed
+ and order is as given.
+ */
+ virtual ClpObjective * subsetClone (int numberColumns,
+ const int * whichColumns) const;
+
+ //@}
+
+ //---------------------------------------------------------------------------
+
+private:
+ ///@name Private member data
+ /// Objective
+ double * objective_;
+ /// number of columns
+ int numberColumns_;
+ //@}
+};
+
+#endif