finite_element.h

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// ---------------------------------------------------------------------
//
// Copyright (C) 2022 by Luca Heltai
//
// This file is part of the FSI-suite platform, based on the deal.II library.
//
// The FSI-suite platform 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 3.0 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 FSI-suite platform
// distribution.
//
// ---------------------------------------------------------------------
 
#ifndef parsed_tools_finite_element_h
#define parsed_tools_finite_element_h
 
#include <deal.II/base/parameter_acceptor.h>
 
#include <deal.II/fe/fe.h>
 
namespace ParsedTools
{
  template <int dim, int spacedim = dim>
  class FiniteElement : public dealii::ParameterAcceptor
  {
  public:
    FiniteElement(const std::string &section_name    = "",
                  const std::string &component_names = "u",
                  const std::string &fe_name         = "FE_Q(1)");
 
    operator dealii::FiniteElement<dim, spacedim> &();
 
    operator const dealii::FiniteElement<dim, spacedim> &() const;
 
 
    dealii::FiniteElement<dim, spacedim> &
    operator()();
 
    const dealii::FiniteElement<dim, spacedim> &
    operator()() const;
 
    const std::string &
    get_joint_component_names() const;
 
 
    const std::vector<std::string> &
    get_component_names() const;
 
    std::vector<unsigned int>
    get_component_blocks() const;
 
 
    std::string
    get_block_names() const;
 
    unsigned int
    n_components() const;
 
    unsigned int
    n_blocks() const;
 
    unsigned int
    get_first_occurence(const std::string &var) const;
 
    bool
    is_vector(const std::string &var) const;
 
  protected:
    const std::string joint_component_names;
 
    const std::vector<std::string> component_names;
 
    std::string fe_name;
 
    std::vector<unsigned int> component_blocks;
 
    std::vector<std::string> block_names;
 
    std::unique_ptr<dealii::FiniteElement<dim, spacedim>> fe;
  };
 
} // namespace ParsedTools
 
#endif