scsgmapper.hh

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// SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
// SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_GRID_COMMON_SCSGMAPPER_HH
#define DUNE_GRID_COMMON_SCSGMAPPER_HH

#include <iostream>
#include "mapper.hh"

#include <dune/grid/common/grid.hh>

namespace Dune
{
  template <typename GV, int c>
  class SingleCodimSingleGeomTypeMapper :
    public Mapper<typename GV::Grid,SingleCodimSingleGeomTypeMapper<GV,c>, typename GV::IndexSet::IndexType >
  {
  public:

    typedef typename GV::IndexSet::IndexType Index;

    using size_type = decltype(std::declval<typename GV::IndexSet>().size(0));

    SingleCodimSingleGeomTypeMapper (const GV& gridView)
    : gridView_(gridView)
    , indexSet_(&gridView_.indexSet())
    {
      // check that grid has only a single geometry type
      if (indexSet_->types(c).size() != 1)
        DUNE_THROW(GridError, "mapper treats only a single codim and a single geometry type");
    }

    template<class EntityType>
    Index index (const EntityType& e) const
    {
      static_assert(EntityType::codimension == c, "Entity of wrong codim passed to SingleCodimSingleGeomTypeMapper");
      return indexSet_->index(e);
    }

    Index subIndex (const typename GV::template Codim<0>::Entity& e,
               int i, unsigned int codim) const
    {
      if (codim != c)
        DUNE_THROW(GridError, "Id of wrong codim requested from SingleCodimSingleGeomTypeMapper");
      return indexSet_->subIndex(e,i,codim);
    }

    size_type size () const
    {
      return indexSet_->size(c);
    }

    template<class EntityType>
    bool contains (const EntityType& e, Index& result) const
    {
      result = index(e);
      return true;
    }

    bool contains (const typename GV::template Codim<0>::Entity& e, int i, int cc, Index& result) const
    {
      result = subIndex(e,i,cc);
      return true;
    }

    void update (const GV& gridView)
    {
      gridView_ = gridView;
      indexSet_ = &gridView_.indexSet();
    }

    void update (GV&& gridView)
    {
      gridView_ = std::move(gridView);
      indexSet_ = &gridView_.indexSet();
    }

  private:
    GV gridView_;
    const typename GV::IndexSet* indexSet_;
  };

}
#endif