discretization/cvfe/elementfluxvariablescache.hh

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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
//
// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
// SPDX-License-Identifier: GPL-3.0-or-later
//
#ifndef DUMUX_DISCRETIZATION_CVFE_ELEMENT_FLUXVARSCACHE_HH
#define DUMUX_DISCRETIZATION_CVFE_ELEMENT_FLUXVARSCACHE_HH
 
#include <cstddef>
#include <vector>
#include <utility>
 
namespace Dumux {
 
template<class GFVC, bool cachingEnabled>
class CVFEElementFluxVariablesCache
{};
 
template<class GFVC>
class CVFEElementFluxVariablesCache<GFVC, true>
{
public:
    using GridFluxVariablesCache = GFVC;
 
    using FluxVariablesCache = typename GFVC::FluxVariablesCache;
 
    CVFEElementFluxVariablesCache(const GridFluxVariablesCache& global)
    : gridFluxVarsCachePtr_(&global) {}
 
    // Function is called by the BoxLocalJacobian prior to flux calculations on the element.
    // We assume the FVGeometries to be bound at this point
    template<class FVElementGeometry, class ElementVolumeVariables>
    void bind(const typename FVElementGeometry::GridGeometry::GridView::template Codim<0>::Entity& element,
              const FVElementGeometry& fvGeometry,
              const ElementVolumeVariables& elemVolVars) &
    { bindElement(element, fvGeometry, elemVolVars); }
 
    template<class FVElementGeometry, class ElementVolumeVariables>
    CVFEElementFluxVariablesCache bind(const typename FVElementGeometry::GridGeometry::GridView::template Codim<0>::Entity& element,
                                       const FVElementGeometry& fvGeometry,
                                       const ElementVolumeVariables& elemVolVars) &&
    {
        this->bind(element, fvGeometry, elemVolVars);
        return std::move(*this);
    }
 
    template<class FVElementGeometry, class ElementVolumeVariables>
    void bindElement(const typename FVElementGeometry::GridGeometry::GridView::template Codim<0>::Entity& element,
                     const FVElementGeometry& fvGeometry,
                     const ElementVolumeVariables& elemVolVars) &
    { eIdx_ = fvGeometry.gridGeometry().elementMapper().index(element); }
 
    template<class FVElementGeometry, class ElementVolumeVariables>
    CVFEElementFluxVariablesCache bindElement(const typename FVElementGeometry::GridGeometry::GridView::template Codim<0>::Entity& element,
                                              const FVElementGeometry& fvGeometry,
                                              const ElementVolumeVariables& elemVolVars) &&
    {
        this->bindElement(element, fvGeometry, elemVolVars);
        return std::move(*this);
    }
 
    template<class FVElementGeometry, class ElementVolumeVariables>
    void bindScvf(const typename FVElementGeometry::GridGeometry::GridView::template Codim<0>::Entity& element,
                  const FVElementGeometry& fvGeometry,
                  const ElementVolumeVariables& elemVolVars,
                  const typename FVElementGeometry::SubControlVolumeFace& scvf) &
    { bindElement(element, fvGeometry, elemVolVars); }
 
    template<class FVElementGeometry, class ElementVolumeVariables>
    CVFEElementFluxVariablesCache bindScvf(const typename FVElementGeometry::GridGeometry::GridView::template Codim<0>::Entity& element,
                                           const FVElementGeometry& fvGeometry,
                                           const ElementVolumeVariables& elemVolVars,
                                           const typename FVElementGeometry::SubControlVolumeFace& scvf) &&
    {
        this->bindScvf(element, fvGeometry, elemVolVars, scvf);
        return std::move(*this);
    }
 
    template<class FVElementGeometry, class ElementVolumeVariables>
    void update(const typename FVElementGeometry::Element& element,
                const FVElementGeometry& fvGeometry,
                const ElementVolumeVariables& elemVolVars) {}
 
    // access operator
    template<class SubControlVolumeFace>
    const FluxVariablesCache& operator [](const SubControlVolumeFace& scvf) const
    { return gridFluxVarsCache().cache(eIdx_, scvf.index()); }
 
    const GridFluxVariablesCache& gridFluxVarsCache() const
    {  return *gridFluxVarsCachePtr_; }
 
private:
    const GridFluxVariablesCache* gridFluxVarsCachePtr_;
    std::size_t eIdx_; 
};
 
template<class GFVC>
class CVFEElementFluxVariablesCache<GFVC, false>
{
public:
    using GridFluxVariablesCache = GFVC;
 
    using FluxVariablesCache = typename GFVC::FluxVariablesCache;
 
    CVFEElementFluxVariablesCache(const GridFluxVariablesCache& global)
    : gridFluxVarsCachePtr_(&global) {}
 
    // Function is called by the BoxLocalJacobian prior to flux calculations on the element.
    // We assume the FVGeometries to be bound at this point
    template<class FVElementGeometry, class ElementVolumeVariables>
    void bind(const typename FVElementGeometry::GridGeometry::GridView::template Codim<0>::Entity& element,
              const FVElementGeometry& fvGeometry,
              const ElementVolumeVariables& elemVolVars) &
    {
        bindElement(element, fvGeometry, elemVolVars);
    }
 
    template<class FVElementGeometry, class ElementVolumeVariables>
    CVFEElementFluxVariablesCache bind(const typename FVElementGeometry::GridGeometry::GridView::template Codim<0>::Entity& element,
                                       const FVElementGeometry& fvGeometry,
                                       const ElementVolumeVariables& elemVolVars) &&
    {
        this->bind(element, fvGeometry, elemVolVars);
        return std::move(*this);
    }
 
    template<class FVElementGeometry, class ElementVolumeVariables>
    void bindElement(const typename FVElementGeometry::GridGeometry::GridView::template Codim<0>::Entity& element,
                     const FVElementGeometry& fvGeometry,
                     const ElementVolumeVariables& elemVolVars) &
    {
        // temporary resizing of the cache
        fluxVarsCache_.resize(fvGeometry.numScvf());
        for (auto&& scvf : scvfs(fvGeometry))
            (*this)[scvf].update(gridFluxVarsCache().problem(), element, fvGeometry, elemVolVars, scvf);
    }
 
    template<class FVElementGeometry, class ElementVolumeVariables>
    CVFEElementFluxVariablesCache bindElement(const typename FVElementGeometry::GridGeometry::GridView::template Codim<0>::Entity& element,
                                              const FVElementGeometry& fvGeometry,
                                              const ElementVolumeVariables& elemVolVars) &&
    {
        this->bindElement(element, fvGeometry, elemVolVars);
        return std::move(*this);
    }
 
    template<class FVElementGeometry, class ElementVolumeVariables>
    void bindScvf(const typename FVElementGeometry::GridGeometry::GridView::template Codim<0>::Entity& element,
                  const FVElementGeometry& fvGeometry,
                  const ElementVolumeVariables& elemVolVars,
                  const typename FVElementGeometry::SubControlVolumeFace& scvf) &
    {
        fluxVarsCache_.resize(fvGeometry.numScvf());
        (*this)[scvf].update(gridFluxVarsCache().problem(), element, fvGeometry, elemVolVars, scvf);
    }
 
    template<class FVElementGeometry, class ElementVolumeVariables>
    CVFEElementFluxVariablesCache bindScvf(const typename FVElementGeometry::GridGeometry::GridView::template Codim<0>::Entity& element,
                                           const FVElementGeometry& fvGeometry,
                                           const ElementVolumeVariables& elemVolVars,
                                           const typename FVElementGeometry::SubControlVolumeFace& scvf) &&
    {
        this->bindScvf(element, fvGeometry, elemVolVars, scvf);
        return std::move(*this);
    }
 
    template<class FVElementGeometry, class ElementVolumeVariables>
    void update(const typename FVElementGeometry::Element& element,
                const FVElementGeometry& fvGeometry,
                const ElementVolumeVariables& elemVolVars)
    {
        if constexpr (FluxVariablesCache::isSolDependent)
        {
            fluxVarsCache_.resize(fvGeometry.numScvf());
            for (const auto& scvf : scvfs(fvGeometry))
                (*this)[scvf].update(gridFluxVarsCache().problem(), element, fvGeometry, elemVolVars, scvf);
        }
    }
 
    // access operator
    template<class SubControlVolumeFace>
    const FluxVariablesCache& operator [](const SubControlVolumeFace& scvf) const
    { return fluxVarsCache_[scvf.index()]; }
 
    // access operator
    template<class SubControlVolumeFace>
    FluxVariablesCache& operator [](const SubControlVolumeFace& scvf)
    { return fluxVarsCache_[scvf.index()]; }
 
    const GridFluxVariablesCache& gridFluxVarsCache() const
    {  return *gridFluxVarsCachePtr_; }
 
private:
    const GridFluxVariablesCache* gridFluxVarsCachePtr_;
    std::vector<FluxVariablesCache> fluxVarsCache_;
};
 
} // end namespace Dumux
 
#endif