ThermoRefPair.H

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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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    You should have received a copy of the GNU General Public License
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Class
    Foam::ThermoRefPair
 
Description
    Class containing a pair of thermo references. Handles down-casting to more
    specific thermo types by constructing one pair from another (e.g.,
    constructing a multicomponentThermo reference pair from a basicThermo
    pair). Tracks validity of the references.
 
\*---------------------------------------------------------------------------*/
 
#ifndef ThermoRefPair_H
#define ThermoRefPair_H
 
#include "physicalProperties.H"
#include "objectRegistry.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                    Class ThermoRefPair Declaration
\*---------------------------------------------------------------------------*/
 
template<class ThermoType>
class ThermoRefPair
{
    // Private Member Data
 
        //- Validity flags
        const Pair<bool> valid_;
 
        //- The first thermo
        const ThermoType& first_;
 
        //- The second thermo
        const ThermoType& second_;
 
 
public:
 
    // Constructors
 
        //- Construct from a database and phase names
        ThermoRefPair
        (
            const objectRegistry& db,
            const Pair<word>& phaseNames
        )
        :
            valid_(true, true),
            first_
            (
                db.lookupObject<ThermoType>
                (
                    IOobject::groupName
                    (
                        physicalProperties::typeName,
                        phaseNames.first()
                    )
                )
            ),
            second_
            (
                db.lookupObject<ThermoType>
                (
                    IOobject::groupName
                    (
                        physicalProperties::typeName,
                        phaseNames.second()
                    )
                )
            )
        {}
 
        //- Construct by casting a more primitive thermo type
        template<class BasicThermoType>
        ThermoRefPair(const ThermoRefPair<BasicThermoType> basicThermos)
        :
            valid_
            (
                isA<ThermoType>(basicThermos.first()),
                isA<ThermoType>(basicThermos.second())
            ),
            first_
            (
                valid_.first()
              ? refCast<const ThermoType>(basicThermos.first())
              : NullObjectRef<ThermoType>()
            ),
            second_
            (
                valid_.second()
              ? refCast<const ThermoType>(basicThermos.second())
              : NullObjectRef<ThermoType>()
            )
        {}
 
 
    // Member Functions
 
        //- Access the validity flags
        const Pair<bool>& valid() const
        {
            return valid_;
        }
 
        //- Access the first thermo
        const ThermoType& first() const
        {
            return first_;
        }
 
        //- Access the second thermo
        const ThermoType& second() const
        {
            return second_;
        }
 
 
    // Member Operators
 
        //- Access a thermo by index
        const ThermoType& operator[](const label i) const
        {
            return
                i == 0 ? first()
              : i == 1 ? second()
              : NullObjectRef<ThermoType>();
        }
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //