/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Copyright (C) 2023-2026 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

Class
    Foam::reverseInterpolativeFieldMapper

Description
    Reverse field mapper

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

#ifndef reverseInterpolativeFieldMapper_H
#define reverseInterpolativeFieldMapper_H

#include "fieldMapper.H"

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

namespace Foam
{

/*---------------------------------------------------------------------------*\
                Class reverseInterpolativeFieldMapper Declaration
\*---------------------------------------------------------------------------*/

class reverseInterpolativeFieldMapper
:
    public fieldMapper
{
    // Private Data

        //- Addressing from new back to old
        const labelUList& addressing_;

        //- Weights
        const scalarUList& weights_;


    // Private Member Functions

        //- Map a field in-place
        template<class Type>
        void map(Field<Type>& f, const Field<Type>& mapF) const;

        //- Map a field and return the result
        template<class Type>
        tmp<Field<Type>> map(const Field<Type>& f) const;


public:

    // Constructors

        //- Construct given addressing
        reverseInterpolativeFieldMapper
        (
            const labelUList& addressing,
            const scalarUList& weights
        )
        :
            addressing_(addressing),
            weights_(weights)
        {}


    //- Destructor
    virtual ~reverseInterpolativeFieldMapper()
    {}


    // Member Functions

        //- This mapper in interpolative, i.e. not direct
        virtual bool direct() const
        {
            return false;
        }


    // Member Operators

        //- Map a field
        FOR_ALL_FIELD_TYPES(DEFINE_FIELD_MAPPER_MAP_OPERATOR, );

        //- Map a label field
        DEFINE_FIELD_MAPPER_MAP_OPERATOR(label, );
};


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

} // End namespace Foam

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

#endif

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