#include <deal.II/lac/solver_selector.h>

Inheritance diagram for SolverSelector< VectorType >:

Public Types
typedef VectorType	vector_type

Public Member Functions
	SolverSelector ()=default

	~SolverSelector ()

template<class Matrix , class Preconditioner >
void	solve (const Matrix &A, VectorType &x, const VectorType &b, const Preconditioner &precond) const

void	select (const std::string &name)

void	set_control (SolverControl &ctrl)

void	set_data (const typename SolverRichardson< VectorType > ::AdditionalData &data)

void	set_data (const typename SolverCG< VectorType > ::AdditionalData &data)

void	set_data (const typename SolverMinRes< VectorType > ::AdditionalData &data)

void	set_data (const typename SolverBicgstab< VectorType > ::AdditionalData &data)

void	set_data (const typename SolverGMRES< VectorType > ::AdditionalData &data)

void	set_data (const typename SolverFGMRES< VectorType > ::AdditionalData &data)

Public Member Functions inherited from Subscriptor
	Subscriptor ()

	Subscriptor (const Subscriptor &)

	Subscriptor (Subscriptor &&) noexcept

virtual	~Subscriptor ()

Subscriptor &	operator= (const Subscriptor &)

Subscriptor &	operator= (Subscriptor &&) noexcept

void	subscribe (const char *identifier=nullptr) const

void	unsubscribe (const char *identifier=nullptr) const

unsigned int	n_subscriptions () const

void	list_subscribers () const

template<class Archive >
void	serialize (Archive &ar, const unsigned int version)

Static Public Member Functions
static std::string	get_solver_names ()

static ::ExceptionBase &	ExcSolverDoesNotExist (std::string arg1)

Static Public Member Functions inherited from Subscriptor
static ::ExceptionBase &	ExcInUse (int arg1, std::string arg2, std::string arg3)

static ::ExceptionBase &	ExcNoSubscriber (std::string arg1, std::string arg2)

Protected Attributes
SmartPointer< SolverControl, SolverSelector< VectorType > >	control

std::string	solver_name

Private Attributes
SolverRichardson< VectorType >::AdditionalData	richardson_data

SolverCG< VectorType >::AdditionalData	cg_data

SolverMinRes< VectorType >::AdditionalData	minres_data

SolverBicgstab< VectorType >::AdditionalData	bicgstab_data

SolverGMRES< VectorType >::AdditionalData	gmres_data

SolverFGMRES< VectorType >::AdditionalData	fgmres_data

Detailed Description

template<typename VectorType = Vector<double>>
class SolverSelector< VectorType >

Selects a solver by changing a parameter.

By calling the solve function of this SolverSelector, it selects the solve function of that Solver that was specified in the constructor of this class.

Usage

The simplest use of this class is the following:

                                 // generate a @p SolverControl and
                                 // a @p VectorMemory
SolverControl control;
VectorMemory<Vector<double> > memory;
                                 // Line 3:
                                 //
                                 // generate a @p SolverSelector that
                                 // calls the @p SolverCG
SolverSelector<Vector<double> >
  solver_selector("cg", control, memory);
                                 // generate e.g. a @p PreconditionRelaxation
PreconditionRelaxation<SparseMatrix<double>, Vector<double> >
  preconditioning(A, &SparseMatrix<double>
                  ::template precondition_SSOR<double>,0.8);
                                 // call the @p solve function with this
                                 // preconditioning as last argument
solver_selector.solve(A,x,b,preconditioning);

But the full usefulness of the SolverSelector class is not clear until the presentation of the following example that assumes the user using the ParameterHandler class and having declared a "solver" entry, e.g. with

Parameter_Handler prm;
prm.declare_entry ("solver", "none",
                   Patterns::Selection(SolverSelector<>::get_solver_names()));
...

Assuming that in the users parameter file there exists the line

* set solver = cg
*

then ‘Line 3’ of the above example reads

SolverSelector<SparseMatrix<double>, Vector<double> >

solver_selector(prm.get("solver"), control, memory);

If at some time there exists a new solver "xyz" then the user does not need to change his program. Only in the implementation of the SolverSelector the calling of this solver has to be added and each user with program lines quoted above only needs to 'set solver = xyz' in his parameter file to get access to that new solver. :-)

(By the way, thanks to Wolfgang for implementing the ParameterHandler.)

Author: Ralf Hartmann, 1999

Definition at line 98 of file solver_selector.h.

Member Typedef Documentation

◆ vector_type

template<typename VectorType = Vector<double>>

typedef VectorType SolverSelector< VectorType >::vector_type

A typedef for the underlying vector type

Definition at line 104 of file solver_selector.h.

Constructor & Destructor Documentation

◆ SolverSelector()

template<typename VectorType = Vector<double>>

SolverSelector< VectorType >::SolverSelector ( )

default

Constructor, filling in default values

◆ ~SolverSelector()

template<typename VectorType >

SolverSelector< VectorType >::~SolverSelector ( )

Destructor

Definition at line 246 of file solver_selector.h.

Member Function Documentation

◆ solve()

template<typename VectorType >

template<class Matrix , class Preconditioner >

void SolverSelector< VectorType >::solve	(	const Matrix &	A,
		VectorType &	x,
		const VectorType &	b,
		const Preconditioner &	precond
	)		const

Solver procedure. Calls the solve function of the solver whose SolverName was specified in the constructor.

Definition at line 261 of file solver_selector.h.

◆ select()

template<typename VectorType >

void SolverSelector< VectorType >::select ( const std::string & name )

Select a new solver. Note that all solver names used in this class are all lower case.

Definition at line 252 of file solver_selector.h.

◆ set_control()

template<typename VectorType >

void SolverSelector< VectorType >::set_control ( SolverControl & ctrl )

Set a new SolverControl. This needs to be set before solving.

Definition at line 302 of file solver_selector.h.

◆ set_data() [1/6]

template<typename VectorType = Vector<double>>

void SolverSelector< VectorType >::set_data ( const typename SolverRichardson< VectorType > ::AdditionalData & data )

Set the additional data. For more information see the Solver class.

◆ set_data() [2/6]

template<typename VectorType = Vector<double>>

void SolverSelector< VectorType >::set_data ( const typename SolverCG< VectorType > ::AdditionalData & data )

Set the additional data. For more information see the Solver class.

◆ set_data() [3/6]

template<typename VectorType = Vector<double>>

void SolverSelector< VectorType >::set_data ( const typename SolverMinRes< VectorType > ::AdditionalData & data )

Set the additional data. For more information see the Solver class.

◆ set_data() [4/6]

template<typename VectorType = Vector<double>>

void SolverSelector< VectorType >::set_data ( const typename SolverBicgstab< VectorType > ::AdditionalData & data )

Set the additional data. For more information see the Solver class.

◆ set_data() [5/6]

template<typename VectorType = Vector<double>>

void SolverSelector< VectorType >::set_data ( const typename SolverGMRES< VectorType > ::AdditionalData & data )

Set the additional data. For more information see the Solver class.

◆ set_data() [6/6]

template<typename VectorType = Vector<double>>

void SolverSelector< VectorType >::set_data ( const typename SolverFGMRES< VectorType > ::AdditionalData & data )

Set the additional data. For more information see the Solver class.

◆ get_solver_names()

template<typename VectorType >

std::string SolverSelector< VectorType >::get_solver_names ( )

static

Get the names of all implemented solvers. The list of possible options includes:

"richardson"
"cg"
"bicgstab"
"gmres"
"fgmres"
"minres"

Definition at line 309 of file solver_selector.h.

Member Data Documentation

◆ control

template<typename VectorType = Vector<double>>

SmartPointer< SolverControl, SolverSelector< VectorType > > SolverSelector< VectorType >::control

protected

Stores the SolverControl that is needed in the constructor of each Solver class. This can be changed with set_control().

Definition at line 202 of file solver_selector.h.

◆ solver_name

template<typename VectorType = Vector<double>>

std::string SolverSelector< VectorType >::solver_name

protected

Stores the name of the solver.

Definition at line 207 of file solver_selector.h.

◆ richardson_data

template<typename VectorType = Vector<double>>

SolverRichardson<VectorType>::AdditionalData SolverSelector< VectorType >::richardson_data

private

Stores the additional data.

Definition at line 213 of file solver_selector.h.

◆ cg_data

template<typename VectorType = Vector<double>>

SolverCG<VectorType>::AdditionalData SolverSelector< VectorType >::cg_data

private

Stores the additional data.

Definition at line 218 of file solver_selector.h.

◆ minres_data

template<typename VectorType = Vector<double>>

SolverMinRes<VectorType>::AdditionalData SolverSelector< VectorType >::minres_data

private

Stores the additional data.

Definition at line 223 of file solver_selector.h.

◆ bicgstab_data

template<typename VectorType = Vector<double>>

SolverBicgstab<VectorType>::AdditionalData SolverSelector< VectorType >::bicgstab_data

private

Stores the additional data.

Definition at line 228 of file solver_selector.h.

◆ gmres_data

template<typename VectorType = Vector<double>>

SolverGMRES<VectorType>::AdditionalData SolverSelector< VectorType >::gmres_data

private

Stores the additional data.

Definition at line 233 of file solver_selector.h.

◆ fgmres_data

template<typename VectorType = Vector<double>>

SolverFGMRES<VectorType>::AdditionalData SolverSelector< VectorType >::fgmres_data

private

Stores the additional data.

Definition at line 238 of file solver_selector.h.

The documentation for this class was generated from the following file:

deal.II/lac/solver_selector.h

Public Types

Public Member Functions

Static Public Member Functions

Protected Attributes

Private Attributes

Detailed Description

template<typename VectorType = Vector<double>> class SolverSelector< VectorType >

Usage

Member Typedef Documentation

◆ vector_type

Constructor & Destructor Documentation

◆ SolverSelector()

◆ ~SolverSelector()

Member Function Documentation

◆ solve()

◆ select()

◆ set_control()

◆ set_data() [1/6]

◆ set_data() [2/6]

◆ set_data() [3/6]

◆ set_data() [4/6]

◆ set_data() [5/6]

◆ set_data() [6/6]

◆ get_solver_names()

Member Data Documentation

◆ control

◆ solver_name

◆ richardson_data

◆ cg_data

◆ minres_data

◆ bicgstab_data

◆ gmres_data

◆ fgmres_data

template<typename VectorType = Vector<double>>
class SolverSelector< VectorType >