/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Copyright (C) 2011-2026 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::mappedValueFvPatchField

Description
    This boundary condition maps the values from a neighbouring patch to this
    patch.

Usage
    \table
        Property     | Description                | Required | Default value
        field        | name of field to be mapped | no       | this field name
        setAverage   | set the average value?     | no       | yes if average \\
                                                               is specified, \\
                                                               no otherwise
        average      | average value to apply     | if setAverage is true |
    \endtable

    Example of the boundary condition specification:
    \verbatim
    <patchName>
    {
        type            mappedValue;
        field           T;
        average         300;
        value           uniform 300;
    }
    \endverbatim

    This boundary condition will usually be applied to a patch which is of
    mappedPatchBase type, and which holds all the necessary mapping
    information. It can also create its own mapping data which overrides that
    in the mapped patch, or so that it can be applied to a non-mapped patch.
    This is triggered by the presence of controls relating to mappedPatchBase
    (i.e., neighbourRegion, neighbourPatch, etc ...).

See also
    Foam::mappedPatchBase
    Foam::mappedPolyPatch
    Foam::mappedFvPatch

SourceFiles
    mappedValueFvPatchField.C

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

#ifndef mappedValueFvPatchField_H
#define mappedValueFvPatchField_H

#include "fixedValueFvPatchFields.H"
#include "mappedPatchBase.H"

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

namespace Foam
{

/*---------------------------------------------------------------------------*\
                   Class mappedValueFvPatchField Declaration
\*---------------------------------------------------------------------------*/

template<class Type>
class mappedValueFvPatchField
:
    public fixedValueFvPatchField<Type>
{
protected:

    // Protected Data

        //- The field to map
        const word fieldName_;

        //- If true adjust the sampled field to maintain an average value
        const bool setAverage_;

        //- Average value the sampled field is adjusted to
        const Type average_;

        //- The mapping engine
        autoPtr<mappedPatchBase> mapperPtr_;


    // Protected Member Functions

        //- Return the mapping engine
        const mappedPatchBase& mapper() const;

        //- Return the neighbouring patch field
        const fvPatchField<Type>& nbrPatchField() const;

        //- Return the mapped values, given the neighbouring field
        tmp<Field<Type>> mappedValues(const Field<Type>& nbrPatchField) const;


public:

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


    // Constructors

        //- Construct from patch and internal field
        mappedValueFvPatchField
        (
            const fvPatch&,
            const DimensionedField<Type, fvMesh>&
        );

        //- Construct from patch, internal field and dictionary
        mappedValueFvPatchField
        (
            const fvPatch&,
            const DimensionedField<Type, fvMesh>&,
            const dictionary&
        );

        //- Construct by mapping given mappedValueFvPatchField
        //  onto a new patch
        mappedValueFvPatchField
        (
            const mappedValueFvPatchField<Type>&,
            const fvPatch&,
            const DimensionedField<Type, fvMesh>&,
            const fieldMapper&
        );

        //- Disallow copy without setting internal field reference
        mappedValueFvPatchField
        (
            const mappedValueFvPatchField<Type>&
        ) = delete;

        //- Copy constructor setting internal field reference
        mappedValueFvPatchField
        (
            const mappedValueFvPatchField<Type>&,
            const DimensionedField<Type, fvMesh>&
        );

        //- Construct and return a clone setting internal field reference
        virtual tmp<fvPatchField<Type>> clone
        (
            const DimensionedField<Type, fvMesh>& iF
        ) const
        {
            return tmp<fvPatchField<Type>>
            (
                new mappedValueFvPatchField<Type>(*this, iF)
            );
        }


    // Member Functions

        using fvPatchField<Type>::patch;
        using fvPatchField<Type>::internalField;


        // Mapping functions

            //- Map the given fvPatchField onto this fvPatchField
            virtual void map(const fvPatchField<Type>&, const fieldMapper&);

            //- Reset the fvPatchField to the given fvPatchField
            //  Used for mesh to mesh mapping
            virtual void reset(const fvPatchField<Type>&);


        // Evaluation functions

            //- Update the coefficients associated with the patch field
            virtual void updateCoeffs();


        //- Write
        virtual void write(Ostream&) const;


    // Member Operators

        //- Inherit assignment
        using fixedValueFvPatchField<Type>::operator=;
};


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

} // End namespace Foam

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

#ifdef NoRepository
    #include "mappedValueFvPatchField.C"
#endif

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

#endif

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