Teko_SolveInverseFactory.cpp

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//      Teko: A package for block and physics based preconditioning
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#include "Teko_SolveInverseFactory.hpp"

// Thyra includes
#include "Thyra_DefaultLinearOpSource.hpp"
#include "Thyra_DefaultInverseLinearOp.hpp"
#include "Thyra_DefaultPreconditioner.hpp"

// Stratimikos includes
#include "Stratimikos_DefaultLinearSolverBuilder.hpp"

// Teko includes
#include "Teko_Utilities.hpp"
#include "Teko_BlockPreconditionerFactory.hpp"
#include "Teko_Preconditioner.hpp"
#include "Teko_PreconditionerLinearOp.hpp"

using Teuchos::rcp;
using Teuchos::rcp_const_cast;
using Teuchos::rcp_dynamic_cast;
using Teuchos::RCP;

namespace Teko {

SolveInverseFactory::SolveInverseFactory(const Teuchos::RCP<Thyra::LinearOpWithSolveFactoryBase<double> > & lowsFactory)
   : lowsFactory_(lowsFactory)
{ }

SolveInverseFactory::SolveInverseFactory(const SolveInverseFactory & siFactory)
   : lowsFactory_(siFactory.lowsFactory_)
{ }

InverseLinearOp SolveInverseFactory::buildInverse(const LinearOp & linearOp) const
{
   Teko_DEBUG_SCOPE("SolveInverseFactory::buildInverse(linearOp)",10);

   // build and initialize inverse linear op with solve
   Teuchos::RCP<Thyra::LinearOpWithSolveBase<double> > invLOWS = lowsFactory_->createOp();
   lowsFactory_->initializeOp(Thyra::defaultLinearOpSource(linearOp),&*invLOWS,Thyra::SUPPORT_SOLVE_FORWARD_ONLY);
   
   return Thyra::nonconstInverse<double>(invLOWS);
}

InverseLinearOp SolveInverseFactory::buildInverse(const LinearOp & linearOp,const LinearOp & precOp) const
{ 
   Teko_DEBUG_SCOPE("SolveInverseFactory::buildInverse(linearOp,precOp)",10);

   // build and initialize inverse linear op with solve
   Teuchos::RCP<Thyra::LinearOpWithSolveBase<double> > invLOWS = lowsFactory_->createOp();
   lowsFactory_->initializePreconditionedOp(Thyra::defaultLinearOpSource(linearOp),
                                                  Thyra::unspecifiedPrec(precOp),
                                                  &*invLOWS,Thyra::SUPPORT_SOLVE_FORWARD_ONLY);
   
   return Thyra::nonconstInverse<double>(invLOWS);
}

void SolveInverseFactory::rebuildInverse(const LinearOp & source,InverseLinearOp & dest) const
{
   RCP<Thyra::DefaultInverseLinearOp<double> > invDest = rcp_dynamic_cast<Thyra::DefaultInverseLinearOp<double> >(dest);
   RCP<Thyra::LinearOpWithSolveBase<double> > lows = invDest->getNonconstLows();

   // This stems from confusion of if the linear op with solve initializeAndResuseOp actually rebuilds
   // the preconditioner. It seems not to and thus we have a fairly substantial problem.
   // lowsFactory_->initializeAndReuseOp(Thyra::defaultLinearOpSource(source),&*lows);
   lowsFactory_->initializeOp(Thyra::defaultLinearOpSource(source),&*lows);
}

void SolveInverseFactory::rebuildInverse(const LinearOp & source,const LinearOp & precOp,InverseLinearOp & dest) const
{
   RCP<Thyra::DefaultInverseLinearOp<double> > invDest = rcp_dynamic_cast<Thyra::DefaultInverseLinearOp<double> >(dest);
   RCP<Thyra::LinearOpWithSolveBase<double> > lows = invDest->getNonconstLows();

   // lowsFactory_->initializeAndReuseOp(Thyra::defaultLinearOpSource(source),&*lows);
   lowsFactory_->initializePreconditionedOp(Thyra::defaultLinearOpSource(source),
                                                  Thyra::unspecifiedPrec(precOp),
                                                  &*lows,Thyra::SUPPORT_SOLVE_FORWARD_ONLY);
}

Teuchos::RCP<const Teuchos::ParameterList> SolveInverseFactory::getParameterList() const
{ 
   return lowsFactory_->getParameterList(); 
}

} // end namespace Teko