LOCA::Solver::Wrapper Class Reference

A wrapper class for wrapping a NOX solver. More...

#include <LOCA_Solver_Wrapper.H>

Inheritance diagram for LOCA::Solver::Wrapper:

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Collaboration diagram for LOCA::Solver::Wrapper:
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List of all members.

Public Member Functions

 Wrapper (NOX::Solver::Generic &solver)
 Constructor with a non-const reference to a NOX solver.
 Wrapper (const NOX::Solver::Generic &solver)
 Constructor with a const reference to a NOX solver.
 ~Wrapper ()
 Destructor.
bool reset (NOX::Abstract::Group &grp, NOX::StatusTest::Generic &tests, NOX::Parameter::List &params)
 Implementation of reset method (forwarded to wrapped solver).
bool reset (NOX::Abstract::Group &grp, NOX::StatusTest::Generic &tests)
 Implementation of reset method (forwarded to wrapped solver).
NOX::StatusTest::StatusType getStatus ()
 Implementation of getStatus method (forwarded to wrapped solver).
NOX::StatusTest::StatusType iterate ()
 Implementation of iterate method (forwarded to wrapped solver).
NOX::StatusTest::StatusType solve ()
 Implementation of solve method (forwarded to wrapped solver).
const NOX::Abstract::GroupgetSolutionGroup () const
 Returns underlying group if solution group is extended, solution group otherwise.
const NOX::Abstract::GroupgetPreviousSolutionGroup () const
 Returns underlying group if previous solution group is extended, previous solution group otherwise.
int getNumIterations () const
 Implementation of getNumIterations method (forwarded to wrapped solver).
const NOX::Parameter::ListgetParameterList () const
 Implementation of getParameterList method (forwarded to wrapped solver).

Protected Member Functions

void resetWrapper ()
 Grabs appropriate solution groups from solver.

Protected Attributes

NOX::Solver::GenericsolverPtr
 Pointer to the solver object.
const NOX::Abstract::GroupsolnGrpPtr
 Pointer to solution group.
const NOX::Abstract::GroupoldSolnGrpPtr
 Pointer to previous solution group.

Detailed Description

A wrapper class for wrapping a NOX solver.

The LOCA::Solver::Wrapper class provides a wrapper for NOX solvers to change the group data returned by getSolutionGroup() and getPreviousSolutionGroup() so that status tests can operate correctly. LOCA continuation and bifurcation algorithms are implemented by extended groups which augment the nonlinear equations defining equilibrium solutions with appropriate continuation/bifurcation equations. Therefore the groups returned by getSolutionGroup() and getPreviousSolutionGroup() will be groups corresponding to the continuation/bifurcation equations, not the underlying group. Status tests that are designed to use concrete data from the original underlying group (e.g., NOX::StatusTest::NormWRMS) will then fail (usually via a segmentation fault or raised exception) when applied to the extended continuation or bifurcation groups.

This solver wrapper class fixes this problem by reimplementing the solution group accessor methods to return the underlying groups of the solution groups (via LOCA::Extended::AbstractGroup::getUnderlyingGroup()) if they are extended groups (derived from LOCA::Extended::AbstractGroup). If the groups are not extended groups, the original solution groups are returned. All other NOX::Solver::Generic methods are passed to the wrapped solver.

The LOCA::StatusTest::Wrapper class uses this wrapper class to wrap the solver supplied via the checkStatus method which is then forwarded to the original status test. When used properly, the group "seen" by the status test is of the appropriate type for the status test.


Constructor & Destructor Documentation

LOCA::Solver::Wrapper::Wrapper NOX::Solver::Generic solver  ) 
 

Constructor with a non-const reference to a NOX solver.

The constructor calls resetWrapper() to grab the proper solution groups.

LOCA::Solver::Wrapper::Wrapper const NOX::Solver::Generic solver  ) 
 

Constructor with a const reference to a NOX solver.

The constructor calls resetWrapper() to grab the proper solution groups.


The documentation for this class was generated from the following files:
Generated on Thu Sep 18 12:40:48 2008 for NOX by doxygen 1.3.9.1