Teko_TpetraBasicMappingStrategy.cpp

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

#include "Thyra_TpetraThyraWrappers.hpp"
#include "Thyra_DefaultSpmdMultiVector.hpp"

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

namespace Teko {
namespace TpetraHelpers {

// Creates a strided mapping strategy. This class is useful
// for breaking up nodally ordered matrices (i.e. the unknowns
// in a FEM problem are ordered [u0,v0,p0,u1,v1,p1,...]). Current
// implimentation only supports a fixed number of variables
//
//    arguments: 
//       vars - Number of different variables 
//       map  - original Epetra_Map to be broken up
//       comm - Epetra_Comm object related to the map
//
BasicMappingStrategy::BasicMappingStrategy(const Teuchos::RCP<const Tpetra::Map<LO,GO,NT> > & rMap,
                                           const Teuchos::RCP<const Tpetra::Map<LO,GO,NT> > & dMap, const Teuchos::Comm<Thyra::Ordinal> & /* comm */)
{
   rangeMap_ = rMap;
   domainMap_ = dMap;
}

// Virtual function defined in MappingStrategy.  This copies
// an Epetra_MultiVector into a Thyra::MultiVectorBase with
// blocking handled by the strides defined in the constructor.
//
//   arguments:
//      X       - source Epetra_MultiVector
//      thyra_X - destination Thyra::MultiVectorBase
//
void BasicMappingStrategy::copyTpetraIntoThyra(const Tpetra::MultiVector<ST,LO,GO,NT>& X,
                                               const Teuchos::Ptr<Thyra::MultiVectorBase<ST> > & thyra_X) const
{
   // perform a simple copy
   //RCP<Thyra::DefaultSpmdMultiVector<ST> > vec 
   //         = rcp_dynamic_cast<Thyra::DefaultSpmdMultiVector<ST> >(Teuchos::rcpFromRef(*thyra_X)); 
      RCP<Thyra::TpetraMultiVector<ST,LO,GO,NT> > vec = rcp_dynamic_cast<Thyra::TpetraMultiVector<ST,LO,GO,NT> >(Teuchos::rcpFromRef(*thyra_X));
   Teuchos::RCP<Tpetra::MultiVector<ST,LO,GO,NT> > ptrX = Teuchos::rcp_const_cast<Tpetra::MultiVector<ST,LO,GO,NT> >(Teuchos::rcpFromRef(X));
   fillDefaultSpmdMultiVector(vec,ptrX);
}

// Virtual function defined in MappingStrategy.  This copies
// an Epetra_MultiVector into a Thyra::MultiVectorBase with
// blocking handled by the strides defined in the constructor.
//
//   arguments:
//      thyra_Y - source Thyra::MultiVectorBase
//      Y       - destination Epetra_MultiVector
//
void BasicMappingStrategy::copyThyraIntoTpetra(const RCP<const Thyra::MultiVectorBase<ST> > & thyra_Y,
                                                 Tpetra::MultiVector<ST,LO,GO,NT>& Y) const
{

   RCP<const Tpetra::MultiVector<ST,LO,GO,NT> > tSrc = Thyra::TpetraOperatorVectorExtraction<ST,LO,GO,NT>::getConstTpetraMultiVector(thyra_Y);

   Y = *tSrc;
}

} // end namespace Epetra
} // end namespace Teko