ArmijoConditions.H

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License
    This file is part of OpenFOAM.

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Class
    Foam::ArmijoConditions

Description
    Class satisfying the Armijo line search conditions

SourceFiles
    ArmijoConditions.C

\*---------------------------------------------------------------------------*/

#ifndef ArmijoConditions_H
#define ArmijoConditions_H

#include "lineSearch.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{

/*---------------------------------------------------------------------------*\
                       Class ArmijoConditions Declaration
\*---------------------------------------------------------------------------*/

class ArmijoConditions
:
    public lineSearch
{
protected:

    // Protected data

        //- Multiplier of the merit function reduction computed using
        //- a first-order Taylor expansion
        scalar c1_;


private:

    // Private Member Functions

        //- No copy construct
        ArmijoConditions(const ArmijoConditions&) = delete;

        //- No copy assignment
        void operator=(const ArmijoConditions&) = delete;


public:

    //- Runtime type information
    TypeName("ArmijoConditions");


    // Declare run-time constructor selection table

        declareRunTimeSelectionTable
        (
            autoPtr,
            ArmijoConditions,
            dictionary,
            (
                const dictionary& dict,
                const Time& time
            ),
            (dict)
        );


    // Constructors

        //- Construct from components
        ArmijoConditions(const dictionary& dict, const Time& time);


    // Destructor
    virtual ~ArmijoConditions() = default;


    // Member Functions

       //Return the correction of the design variables
       virtual bool converged();

       //Update step in given direction
       virtual void updateStep();
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //