subdomaingrid/hierarchiciterator.hh

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#ifndef DUNE_MULTIDOMAINGRID_SUBDOMAINGRID_HIERARCHICITERATOR_HH
#define DUNE_MULTIDOMAINGRID_SUBDOMAINGRID_HIERARCHICITERATOR_HH
 
#include "entity.hh"
 
namespace Dune {
 
namespace mdgrid {
 
namespace subdomain {
 
template<int,int,typename>
class EntityWrapper;
 
template<typename GridImp>
class HierarchicIteratorWrapper
{
 
  template< int cd, class Grid, class IteratorImp >
  friend class Dune::EntityIterator;
 
  template<int, int, typename>
  friend class EntityWrapper;
 
  template<int, int, typename>
  friend class EntityWrapper;
 
  using MultiDomainIterator = typename GridImp::MultiDomainGrid::template Codim<0>::Entity::HierarchicIterator;
 
public:
 
  static const int codimension = 0;
 
  using EntityWrapper        = Dune::mdgrid::subdomain::EntityWrapper<0,GridImp::dimension,GridImp>;
  using Entity               = typename GridImp::template Codim<0>::Entity;
 
  HierarchicIteratorWrapper()
    : _grid(nullptr)
  {}
 
  HierarchicIteratorWrapper(
    const GridImp* grid,
    const MultiDomainIterator& multiDomainIterator,
    const MultiDomainIterator& multiDomainEnd
    )
    : _grid(grid)
    , _multiDomainIterator(multiDomainIterator)
    , _multiDomainEnd(multiDomainEnd)
  {
    incrementToNextValidPosition();
  }
 
  bool equals(const HierarchicIteratorWrapper& r) const
  {
    return _grid == r._grid && _multiDomainIterator == r._multiDomainIterator;
  }
 
  Entity dereference() const
  {
    return {EntityWrapper(_grid,*_multiDomainIterator)};
  }
 
  void incrementToNextValidPosition() {
    while(_multiDomainIterator != _multiDomainEnd && !_grid->containsMultiDomainEntity(*_multiDomainIterator))
      {
        ++_multiDomainIterator;
      }
  }
 
  void increment() {
    ++_multiDomainIterator;
    incrementToNextValidPosition();
  }
 
private:
 
  const GridImp* _grid;
  MultiDomainIterator _multiDomainIterator;
  MultiDomainIterator _multiDomainEnd;
 
};
 
} // namespace subdomain
 
} // namespace mdgrid
 
} // namespace Dune
 
#endif // DUNE_MULTIDOMAINGRID_SUBDOMAINGRID_HIERARCHICITERATOR_HH