gridcreatorinterface.hh

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#pragma once
 
#include <cstdint>
#include <string>
#include <vector>
 
#include <dune/common/version.hh>
#include <dune/common/parallel/mpihelper.hh>
#include <dune/grid/common/gridfactory.hh>
 
namespace Dune::Vtk
{
 
  template <class GridType, class DerivedType>
  class GridCreatorInterface
  {
  public:
    using Grid = GridType;
    using GlobalCoordinate = typename Grid::template Codim<0>::Entity::Geometry::GlobalCoordinate;
    using Derived = DerivedType;
 
  public:
    GridCreatorInterface (GridFactory<Grid>& factory)
      : factory_(stackobject_to_shared_ptr(factory))
    {}
 
    GridCreatorInterface (std::shared_ptr<GridFactory<Grid>> factory)
      : factory_(std::move(factory))
    {}
 
    template <class... Args,
      std::enable_if_t<std::is_constructible<GridFactory<Grid>, Args...>::value,int> = 0>
    GridCreatorInterface (Args&&... args)
      : factory_(std::make_shared<GridFactory<Grid>>(std::forward<Args>(args)...))
    {}
 
    void insertVertices (std::vector<GlobalCoordinate> const& points,
                        std::vector<std::uint64_t> const& point_ids)
    {
      asDerived().insertVerticesImpl(points, point_ids);
    }
 
    void insertElements (std::vector<std::uint8_t> const& types,
                        std::vector<std::int64_t> const& offsets,
                        std::vector<std::int64_t> const& connectivity)
    {
      asDerived().insertElementsImpl(types, offsets, connectivity);
    }
 
    void insertPieces (std::vector<std::string> const& pieces)
    {
      asDerived().insertPiecesImpl(pieces);
    }
 
    std::unique_ptr<Grid> createGrid () const
    {
      return std::unique_ptr<Grid>(factory_->createGrid());
    }
 
    GridFactory<Grid>& factory ()
    {
      return *factory_;
    }
 
    GridFactory<Grid> const& factory () const
    {
      return *factory_;
    }
 
    auto comm () const
    {
      return MPIHelper::getCommunication();
    }
 
  protected: // cast to derived type
 
    Derived& asDerived ()
    {
      return static_cast<Derived&>(*this);
    }
 
    const Derived& asDerived () const
    {
      return static_cast<const Derived&>(*this);
    }
 
  public: // default implementations
 
    void insertVerticesImpl (std::vector<GlobalCoordinate> const&,
                            std::vector<std::uint64_t> const&)
    {
      /* do nothing */
    }
 
    void insertElementsImpl (std::vector<std::uint8_t> const&,
                            std::vector<std::int64_t> const&,
                            std::vector<std::int64_t> const&)
    {
      /* do nothing */
    }
 
    void insertPiecesImpl (std::vector<std::string> const&)
    {
      /* do nothing */;
    }
 
  protected:
    std::shared_ptr<GridFactory<Grid>> factory_;
  };
 
} // end namespace Dune::Vtk