directFieldMapper.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2013 OpenFOAM Foundation
    Copyright (C) 2019-2022 OpenCFD Ltd.
-------------------------------------------------------------------------------
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::DirectFieldMapper
 
Description
    A templated direct mapper for the given FieldMapper type
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_directFieldMapper_H
#define Foam_directFieldMapper_H
 
#include "FieldMapper.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward Declarations
template<class FieldMapperType> class DirectFieldMapper;
 
// Standard Types
 
//- A FieldMapper with direct mapping
typedef DirectFieldMapper<FieldMapper> directFieldMapper;
 
 
/*---------------------------------------------------------------------------*\
                      Class DirectFieldMapper Declaration
\*---------------------------------------------------------------------------*/
 
template<class FieldMapperType>
class DirectFieldMapper
:
    public FieldMapperType
{
    // Private Data
 
        //- Addressing from new back to old
        const labelUList& directAddressing_;
 
        //- Does map contain any unmapped values
        bool hasUnmapped_;
 
 
    // Private Member Functions
 
        //- Any negative (unmapped) values in the addressing?
        static bool hasUnmappedEntry(const labelUList& directAddr)
        {
            for (const label val : directAddr)
            {
                if (val < 0) return true;  // early exit
            }
            return false;
        }
 
public:
 
    // Public Types
 
        //- The base mapper type
        typedef FieldMapperType mapper_type;
 
 
    // Constructors
 
        //- Construct given addressing, check for unmapped (negative) values
        explicit DirectFieldMapper
        (
            const labelUList& directAddr,
            const bool checkUnmapped = true
        )
        :
            FieldMapperType(),
            directAddressing_(directAddr),
            hasUnmapped_(checkUnmapped && hasUnmappedEntry(directAddr))
        {}
 
 
    //- Destructor
    virtual ~DirectFieldMapper() = default;
 
 
    // Member Functions
 
        //- True if directAddressing is not the null object (unallocated)
        virtual bool hasDirectAddressing() const
        {
            return notNull(directAddressing_);
        }
 
        //- The mapper size is given by the size of the direct addressing
        virtual label size() const
        {
            return directAddressing_.size();
        }
 
        //- It is a direct mapper
        virtual bool direct() const
        {
            return true;
        }
 
        //- Any unmapped values?
        virtual bool hasUnmapped() const
        {
            return hasUnmapped_;
        }
 
        //- Allow modification
        virtual bool& hasUnmapped()
        {
            return hasUnmapped_;
        }
 
        //- Return the direct addressing values
        virtual const labelUList& directAddressing() const
        {
            return directAddressing_;
        }
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //