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equation_systems.h

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// The libMesh Finite Element Library.
// Copyright (C) 2002-2012 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner

// This library is free software; you can 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.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.

// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA



#ifndef LIBMESH_EQUATION_SYSTEMS_H
#define LIBMESH_EQUATION_SYSTEMS_H

// Local Includes
#include "libmesh/libmesh_common.h"
#include "libmesh/parameters.h"
#include "libmesh/system.h"
#include "libmesh/enum_xdr_mode.h"

// HP aCC needs these for some reason
#ifdef __HP_aCC
# include "libmesh/frequency_system.h"
# include "libmesh/transient_system.h"
# include "libmesh/newmark_system.h"
# include "libmesh/steady_system.h"
#endif

// C++ includes
#include <cstddef>
#include <map>
#include <set>
#include <string>
#include <vector>

namespace libMesh
{

// Forward Declarations
class MeshData;
class Elem;
class MeshBase;

// ------------------------------------------------------------
// EquationSystems class definition
class EquationSystems : public ReferenceCountedObject<EquationSystems>
{
public:

  enum ReadFlags { READ_HEADER           = 1,
                   READ_DATA             = 2,
                   READ_ADDITIONAL_DATA  = 4,
                   READ_LEGACY_FORMAT    = 8,
                   TRY_READ_IFEMS        = 16,
                   READ_BASIC_ONLY       = 32 };

  enum WriteFlags { WRITE_DATA             = 1,
                    WRITE_ADDITIONAL_DATA  = 2,
                    WRITE_PARALLEL_FILES   = 4,
                    WRITE_SERIAL_FILES     = 8 };

  EquationSystems (MeshBase& mesh, MeshData* mesh_data=NULL);

  virtual ~EquationSystems ();

  virtual void clear ();

  virtual void init ();

  virtual void reinit ();

  void update ();

  unsigned int n_systems() const;

  bool has_system (const std::string& name) const;

  template <typename T_sys>
  const T_sys & get_system (const std::string& name) const;

  template <typename T_sys>
  T_sys & get_system (const std::string& name);

  template <typename T_sys>
  const T_sys & get_system (const unsigned int num) const;

  template <typename T_sys>
  T_sys & get_system (const unsigned int num);

  const System & get_system (const std::string& name) const;

  System & get_system (const std::string& name);

  const System & get_system (const unsigned int num) const;

  System & get_system (const unsigned int num);

  virtual System & add_system (const std::string& system_type,
                               const std::string& name);

  template <typename T_sys>
  T_sys & add_system (const std::string& name);

  void delete_system (const std::string& name);

  unsigned int n_vars () const;

  std::size_t n_dofs () const;

  std::size_t n_active_dofs() const;

  virtual void solve ();

  virtual void adjoint_solve (const QoISet& qoi_indices = QoISet());

  virtual void sensitivity_solve (const ParameterVector& parameters);

  void build_variable_names (std::vector<std::string>& var_names,
                             const FEType *type=NULL,
                             const std::set<std::string>* system_names=NULL) const;

  void build_solution_vector (std::vector<Number>& soln,
                              const std::string& system_name,
                              const std::string& variable_name = "all_vars") const;

  void build_solution_vector (std::vector<Number>& soln,
                              const std::set<std::string>* system_names=NULL) const;

  void get_solution( std::vector<Number> & soln,
                     std::vector<std::string> & names) const;

  void build_discontinuous_solution_vector (std::vector<Number>& soln) const;

  void read (const std::string& name,
             const libMeshEnums::XdrMODE,
             const unsigned int read_flags=(READ_HEADER | READ_DATA));

  void read (const std::string& name,
             const unsigned int read_flags=(READ_HEADER | READ_DATA));

  void write (const std::string& name,
              const libMeshEnums::XdrMODE,
              const unsigned int write_flags=(WRITE_DATA)) const;

  void write (const std::string& name,
              const unsigned int write_flags=(WRITE_DATA)) const;

  virtual bool compare (const EquationSystems& other_es,
                        const Real threshold,
                        const bool verbose) const;

  virtual std::string get_info() const;

  void print_info (std::ostream& os=libMesh::out) const;

  friend std::ostream& operator << (std::ostream& os, const EquationSystems& es);

  const MeshBase & get_mesh() const;

  MeshBase & get_mesh();

  bool has_mesh_data() const;

  const MeshData & get_mesh_data() const;

  MeshData & get_mesh_data();

  void allgather ();


  Parameters parameters;


protected:


  MeshBase& _mesh;

  MeshData* _mesh_data;

  std::map<std::string, System*> _systems;

  typedef std::map<std::string, System*>::iterator       system_iterator;

  typedef std::map<std::string, System*>::const_iterator const_system_iterator;

private:

  void _read_impl (const std::string& name,
                   const libMeshEnums::XdrMODE,
                   const unsigned int read_flags);

  void _add_system_to_nodes_and_elems();
};



// ------------------------------------------------------------
// EquationSystems inline methods
inline
const MeshBase & EquationSystems::get_mesh () const
{
  return _mesh;
}



inline
MeshBase & EquationSystems::get_mesh ()
{
  return _mesh;
}


inline
const MeshData & EquationSystems::get_mesh_data () const
{
  libmesh_assert(_mesh_data);
  return *_mesh_data;
}


inline
MeshData & EquationSystems::get_mesh_data ()
{
  libmesh_assert(_mesh_data);
  return *_mesh_data;
}

inline
bool EquationSystems::has_mesh_data () const
{
  return (_mesh_data!=NULL);
}


inline
unsigned int EquationSystems::n_systems () const
{
  return libmesh_cast_int<unsigned int>(_systems.size());
}




template <typename T_sys>
inline
T_sys & EquationSystems::add_system (const std::string& name)
{
  T_sys* ptr = NULL;

  if (!_systems.count(name))
    {
      ptr = new T_sys(*this, name, this->n_systems());

      _systems.insert (std::make_pair(name, ptr));

      // Tell all the \p DofObject entities to add a system.
      this->_add_system_to_nodes_and_elems();
    }
  else
    {
      // We now allow redundant add_system calls, to make it
      // easier to load data from files for user-derived system
      // subclasses
//      libMesh::err << "ERROR: There was already a system"
//              << " named " << name
//              << std::endl;

//      libmesh_error();

      ptr = &(this->get_system<T_sys>(name));
    }

  // Return a dynamically casted reference to the newly added System.
  return *ptr;
}



inline
bool EquationSystems::has_system (const std::string& name) const
{
  if (_systems.find(name) == _systems.end())
    return false;
  return true;
}




template <typename T_sys>
inline
const T_sys & EquationSystems::get_system (const unsigned int num) const
{
  libmesh_assert_less (num, this->n_systems());


  const_system_iterator       pos = _systems.begin();
  const const_system_iterator end = _systems.end();

  for (; pos != end; ++pos)
    if (pos->second->number() == num)
      break;

  // Check for errors
  if (pos == end)
    {
      libMesh::err << "ERROR: no system number " << num << " found!"
                    << std::endl;
      libmesh_error();
    }

  // Attempt dynamic cast
  return *libmesh_cast_ptr<T_sys*>(pos->second);
}




template <typename T_sys>
inline
T_sys & EquationSystems::get_system (const unsigned int num)
{
  libmesh_assert_less (num, this->n_systems());

  const_system_iterator       pos = _systems.begin();
  const const_system_iterator end = _systems.end();

  for (; pos != end; ++pos)
    if (pos->second->number() == num)
      break;

  // Check for errors
  if (pos == end)
    {
      libMesh::err << "ERROR: no system number " << num << " found!"
                    << std::endl;
      libmesh_error();
    }

  // Attempt dynamic cast
  return *libmesh_cast_ptr<T_sys*>(pos->second);
}






template <typename T_sys>
inline
const T_sys & EquationSystems::get_system (const std::string& name) const
{
  const_system_iterator pos = _systems.find(name);

  // Check for errors
  if (pos == _systems.end())
    {
      libMesh::err << "ERROR: no system named \"" << name << "\" found!"
                    << std::endl;
      libmesh_error();
    }

  // Attempt dynamic cast
  return *libmesh_cast_ptr<T_sys*>(pos->second);
}






template <typename T_sys>
inline
T_sys & EquationSystems::get_system (const std::string& name)
{
  system_iterator pos = _systems.find(name);

  // Check for errors
  if (pos == _systems.end())
    {
      libMesh::err << "ERROR: no system named " << name << " found!"
                    << std::endl;
      libmesh_error();
    }

  // Attempt dynamic cast
  return *libmesh_cast_ptr<T_sys*>(pos->second);
}







inline
const System & EquationSystems::get_system (const std::string& name) const
{
  return this->get_system<System>(name);
}



inline
System & EquationSystems::get_system (const std::string& name)
{
  return this->get_system<System>(name);
}



inline
const System & EquationSystems::get_system (const unsigned int num) const
{
  return this->get_system<System>(num);
}



inline
System & EquationSystems::get_system (const unsigned int num)
{
  return this->get_system<System>(num);
}


} // namespace libMesh


#endif // LIBMESH_EQUATION_SYSTEMS_H

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Last modified: February 05 2013 19:54:46 UTC

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