104 lines
2.5 KiB
C++
104 lines
2.5 KiB
C++
/*
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* Copyright 2007-2008, Christof Lutteroth, lutteroth@cs.auckland.ac.nz
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* Copyright 2007-2008, James Kim, jkim202@ec.auckland.ac.nz
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* Distributed under the terms of the MIT License.
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*/
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#ifndef CONSTRAINT_H
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#define CONSTRAINT_H
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#include <ObjectList.h>
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#include <String.h>
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#include <SupportDefs.h>
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#include "LinearProgrammingTypes.h"
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#include "Summand.h"
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#include "Variable.h"
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namespace LinearProgramming {
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class LinearSpec;
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/**
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* Hard linear constraint, i.e. one that must be satisfied.
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* May render a specification infeasible.
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*/
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class Constraint {
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public:
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Constraint();
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/*! Creates a soft copy of the constraint which is not connected
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to the solver. Variables are not copied or cloned but the soft copy
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has its own summand list with summands. */
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Constraint(Constraint* constraint);
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int32 Index() const;
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SummandList* LeftSide();
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bool SetLeftSide(SummandList* summands,
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bool deleteOldSummands);
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bool SetLeftSide(double coeff1, Variable* var1);
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bool SetLeftSide(double coeff1, Variable* var1,
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double coeff2, Variable* var2);
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bool SetLeftSide(double coeff1, Variable* var1,
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double coeff2, Variable* var2,
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double coeff3, Variable* var3);
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bool SetLeftSide(double coeff1, Variable* var1,
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double coeff2, Variable* var2,
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double coeff3, Variable* var3,
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double coeff4, Variable* var4);
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OperatorType Op();
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void SetOp(OperatorType value);
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double RightSide() const;
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void SetRightSide(double value);
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double PenaltyNeg() const;
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void SetPenaltyNeg(double value);
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double PenaltyPos() const;
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void SetPenaltyPos(double value);
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const char* Label();
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void SetLabel(const char* label);
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bool IsValid();
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void Invalidate();
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BString ToString() const;
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void PrintToStream();
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~Constraint();
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protected:
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Constraint(LinearSpec* ls,
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SummandList* summands, OperatorType op,
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double rightSide,
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double penaltyNeg = -1,
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double penaltyPos = -1);
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private:
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LinearSpec* fLS;
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SummandList* fLeftSide;
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OperatorType fOp;
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double fRightSide;
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double fPenaltyNeg;
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double fPenaltyPos;
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BString fLabel;
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public:
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friend class LinearSpec;
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};
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typedef BObjectList<Constraint> ConstraintList;
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} // namespace LinearProgramming
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using LinearProgramming::Constraint;
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using LinearProgramming::ConstraintList;
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#endif // CONSTRAINT_H
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