dof_handler_policy.h

// ---------------------------------------------------------------------
//
// Copyright (C) 1998 - 2018 by the deal.II authors
//
// This file is part of the deal.II library.
//
// The deal.II library is free software; you can use it, redistribute
// it, and/or modify it under the terms of the GNU Lesser General
// Public License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// The full text of the license can be found in the file LICENSE at
// the top level of the deal.II distribution.
//
// ---------------------------------------------------------------------

#ifndef dealii_dof_handler_policy_h
#define dealii_dof_handler_policy_h



#include <deal.II/base/config.h>
#include <deal.II/base/exceptions.h>
#include <deal.II/base/template_constraints.h>
#include <deal.II/dofs/dof_tools.h>
#include <deal.II/dofs/dof_renumbering.h>

#include <vector>
#include <map>
#include <set>

DEAL_II_NAMESPACE_OPEN

template <int, int> class DoFHandler;


namespace internal
{
  namespace DoFHandlerImplementation
  {
    struct NumberCache;

    namespace Policy
    {
      struct Implementation;

      template <int dim, int spacedim>
      class PolicyBase
      {
      public:
        virtual ~PolicyBase () = default;

        virtual
        NumberCache
        distribute_dofs () const = 0;

        virtual
        std::vector<NumberCache>
        distribute_mg_dofs () const = 0;

        virtual
        NumberCache
        renumber_dofs (const std::vector<types::global_dof_index> &new_numbers) const = 0;

        virtual
        NumberCache
        renumber_mg_dofs (const unsigned int                          level,
                          const std::vector<types::global_dof_index> &new_numbers) const = 0;
      };


      template <class DoFHandlerType>
      class Sequential : public PolicyBase<DoFHandlerType::dimension,DoFHandlerType::space_dimension>
      {
      public:
        Sequential (DoFHandlerType &dof_handler);

        // documentation is inherited
        virtual
        NumberCache
        distribute_dofs () const;

        // documentation is inherited
        virtual
        std::vector<NumberCache>
        distribute_mg_dofs () const;

        // documentation is inherited
        virtual
        NumberCache
        renumber_dofs (const std::vector<types::global_dof_index>  &new_numbers) const;

        // documentation is inherited
        virtual
        NumberCache
        renumber_mg_dofs (const unsigned int                          level,
                          const std::vector<types::global_dof_index> &new_numbers) const;

      protected:
        SmartPointer<DoFHandlerType> dof_handler;
      };



      template <class DoFHandlerType>
      class ParallelShared : public PolicyBase<DoFHandlerType::dimension,DoFHandlerType::space_dimension>
      {
      public:
        ParallelShared (DoFHandlerType &dof_handler);

        virtual
        NumberCache
        distribute_dofs () const;

        virtual
        std::vector<NumberCache>
        distribute_mg_dofs () const;

        virtual
        NumberCache
        renumber_dofs (const std::vector<types::global_dof_index>  &new_numbers) const;

        // documentation is inherited
        virtual
        NumberCache
        renumber_mg_dofs (const unsigned int                          level,
                          const std::vector<types::global_dof_index> &new_numbers) const;

      private:
        SmartPointer<DoFHandlerType> dof_handler;
      };


      template <class DoFHandlerType>
      class ParallelDistributed : public PolicyBase<DoFHandlerType::dimension,DoFHandlerType::space_dimension>
      {
      public:
        ParallelDistributed (DoFHandlerType &dof_handler);

        // documentation is inherited
        virtual
        NumberCache
        distribute_dofs () const;

        // documentation is inherited
        virtual
        std::vector<NumberCache>
        distribute_mg_dofs () const;

        // documentation is inherited
        virtual
        NumberCache
        renumber_dofs (const std::vector<types::global_dof_index>  &new_numbers) const;

        // documentation is inherited
        virtual
        NumberCache
        renumber_mg_dofs (const unsigned int                          level,
                          const std::vector<types::global_dof_index> &new_numbers) const;

      private:
        SmartPointer<DoFHandlerType> dof_handler;
      };
    }
  }
}



DEAL_II_NAMESPACE_CLOSE

/*----------------------------   dof_handler_policy.h     ---------------------------*/
#endif
/*----------------------------   dof_handler_policy.h     ---------------------------*/