LocalView.hpp

#pragma once

#include <dune/functions/functionspacebases/defaultlocalview.hh>

#include <amdis/common/OptionalNoCopy.hpp>
#include <amdis/functions/NodeCache.hpp>

// NOTE: This is a variant of dune-functions DefaultLocalView

namespace AMDiS
{
  template <class GB>
  class LocalView
      : public Dune::Functions::DefaultLocalView<GB>
  {
    using Super = Dune::Functions::DefaultLocalView<GB>;

  public:
    using GlobalBasis = GB;

    using Tree = typename Super::Tree;

    using TreeCache = NodeCache_t<Tree>;

  public:
    LocalView (GlobalBasis const& globalBasis)
      : Super(globalBasis)
    {}

    TreeCache const& treeCache () const
    {
      if (!treeCache_)
        treeCache_.emplace(makeNodeCache(Super::tree_));

      return *treeCache_;
    }

    LocalView const& rootLocalView () const
    {
      return *this;
    }

  protected:
    mutable OptionalNoCopy<TreeCache> treeCache_ = std::nullopt;
  };

} // end namespace AMDiS