fieldExpression.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2012-2016 OpenFOAM Foundation
    Copyright (C) 2019-2021 OpenCFD Ltd.
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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.
 
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    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::functionObjects::fieldExpression
 
Group
    grpFieldFunctionObjects
 
Description
    Intermediate class for handling field expression function objects
    (e.g. \c blendingFactor etc.) whereinto a single field is input.
 
Usage
    Minimal example by using \c system/controlDict.functions:
    \verbatim
    FOname
    {
        // Mandatory and optional entries
        ...
 
        // Mandatory entries
        field             <word>;
 
        // Optional entries
        result            <word>;
        cellZones         (<word> <word> ... <word>);
    }
    \endverbatim
 
    where the entries mean:
    \table
      Property  | Description                             | Type  | Reqd | Deflt
      field     | Name of the operand field               | word  | yes  | -
      result    | Name of the output field  | word | no   | <FO>(<field>)
      cellZones | Names of cellZones                    | wordRes | no   | -
    \endtable
 
SourceFiles
    fieldExpression.C
    fieldExpressionTemplates.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_functionObjects_fieldExpression_H
#define Foam_functionObjects_fieldExpression_H
 
#include "fvMeshFunctionObject.H"
#include "volFieldsFwd.H"
#include "zoneSubSet.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace functionObjects
{
 
/*---------------------------------------------------------------------------*\
                         Class fieldExpression Declaration
\*---------------------------------------------------------------------------*/
 
class fieldExpression
:
    public fvMeshFunctionObject
{
protected:
 
    // Protected Data
 
        //- Name of field to process
        word fieldName_;
 
        //- Name of result field
        word resultName_;
 
        //- Sub-set mesh
        autoPtr<Detail::zoneSubSet> zoneSubSetPtr_;
 
 
    // Protected Member Functions
 
        //- Calculate the components of the field and return true if successful
        virtual bool calc() = 0;
 
        //- Set the name of result field
        void setResultName(const word& typeName, const word& defaultArg);
 
        //- Return true if required objects are found
        template<class Type>
        bool foundObject(const word& name, const bool verbose = true) const;
 
 
public:
 
    //- Runtime type information
    TypeName("fieldExpression");
 
 
    // Constructors
 
        //- Construct from name, Time and dictionary
        fieldExpression
        (
            const word& name,
            const Time& runTime,
            const dictionary& dict,
            const word& fieldName = word::null,
            const word& resultName = word::null
        );
 
        //- No copy construct
        fieldExpression(const fieldExpression&) = delete;
 
        //- No copy assignment
        void operator=(const fieldExpression&) = delete;
 
 
    //- Destructor
    virtual ~fieldExpression() = default;
 
 
    // Member Functions
 
        //- Read the function-object dictionary
        virtual bool read(const dictionary& dict);
 
        //- Execute the function-object operations
        virtual bool execute();
 
        //- Write the function-object results
        virtual bool write();
 
        //- Clear the result field from the objectRegistry
        virtual bool clear();
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace functionObjects
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "fieldExpressionTemplates.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //