constraint_solver.h

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// Based on "Design Patterns: Elements of Reusable Object-Oriented Software"
// book by Erich Gamma, John Vlissides, Ralph Johnson, and Richard Helm 
//
// Created by Bartosz Rachwal. The National Institute of Advanced Industrial Science and Technology, Japan.

#ifndef OPERATIONAL_MEMENTO_CONSTRAINT_SOLVER_H_
#define OPERATIONAL_MEMENTO_CONSTRAINT_SOLVER_H_

#include "constraint_solver_interface.h"

namespace operational
{
namespace memento
{
class ConstraintSolver : public ConstraintSolverInterface
{
    public:
    static ConstraintSolver *Instance();

    virtual void Solve() override;

    virtual void AddConstraint(Graphic* startConnection, Graphic* endConnection) override;
    virtual void RemoveConstraint(Graphic* startConnection, Graphic* endConnection) override;

    virtual ConstraintSolverMemento *CreateMemento() override;
    virtual void SetMemento(ConstraintSolverMemento*) override;

    private:
    ConstraintSolver();

    static ConstraintSolver* instance_;
    ConstraintSolverMemento* memento_;
};
}
}

#endif