MueLu_TpetraOperator_def.hpp

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#ifndef MUELU_TPETRAOPERATOR_DEF_HPP
#define MUELU_TPETRAOPERATOR_DEF_HPP

#include "MueLu_ConfigDefs.hpp"

#ifdef HAVE_MUELU_TPETRA

#include <Xpetra_BlockedMap.hpp>
#include <Xpetra_Matrix.hpp>
#include <Xpetra_CrsMatrixWrap.hpp>
#include <Xpetra_BlockedCrsMatrix.hpp>
#include <Xpetra_Operator.hpp>
#include <Xpetra_TpetraMultiVector.hpp>

#include "MueLu_TpetraOperator_decl.hpp"
#include "MueLu_Hierarchy.hpp"
#include "MueLu_Utilities.hpp"


namespace MueLu {

template<class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
Teuchos::RCP<const Tpetra::Map<LocalOrdinal,GlobalOrdinal,Node> >
TpetraOperator<Scalar,LocalOrdinal,GlobalOrdinal,Node>::getDomainMap() const {
  typedef Xpetra::Matrix<Scalar, LocalOrdinal, GlobalOrdinal, Node> Matrix;
  typedef Xpetra::Map<LocalOrdinal, GlobalOrdinal, Node> Map;
  typedef Xpetra::BlockedMap<LocalOrdinal, GlobalOrdinal, Node> BlockedMap;

  RCP<const Map> domainMap;
  if(!Hierarchy_.is_null()) domainMap = Hierarchy_->GetLevel(0)->template Get<RCP<Matrix> >("A")->getDomainMap();
  else domainMap = Operator_->getDomainMap();


  RCP<const BlockedMap> bDomainMap = Teuchos::rcp_dynamic_cast<const BlockedMap>(domainMap);
  if(bDomainMap.is_null() == false) {
    return Xpetra::toTpetraNonZero(bDomainMap->getFullMap());
  }
  return Xpetra::toTpetraNonZero(domainMap);
}

template<class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
Teuchos::RCP<const Tpetra::Map<LocalOrdinal,GlobalOrdinal,Node> > TpetraOperator<Scalar,LocalOrdinal,GlobalOrdinal,Node>::getRangeMap() const {
  typedef Xpetra::Matrix<Scalar, LocalOrdinal, GlobalOrdinal, Node> Matrix;
  typedef Xpetra::Map<LocalOrdinal, GlobalOrdinal, Node> Map;
  typedef Xpetra::BlockedMap<LocalOrdinal, GlobalOrdinal, Node> BlockedMap;


  RCP<const Map> rangeMap;
  if(!Hierarchy_.is_null()) rangeMap = Hierarchy_->GetLevel(0)->template Get<RCP<Matrix> >("A")->getRangeMap();
  else rangeMap = Operator_->getRangeMap();

  RCP<const BlockedMap> bRangeMap = Teuchos::rcp_dynamic_cast<const BlockedMap>(rangeMap);
  if(bRangeMap.is_null() == false) {
    return Xpetra::toTpetraNonZero(bRangeMap->getFullMap());
  }
  return Xpetra::toTpetraNonZero(rangeMap);
}

template<class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
void TpetraOperator<Scalar,LocalOrdinal,GlobalOrdinal,Node>::apply(const Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>& X,
                                                                               Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>& Y,
                                                                               Teuchos::ETransp /* mode */, Scalar /* alpha */, Scalar /* beta */) const {
  typedef Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>       TMV;
  typedef Xpetra::TpetraMultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> XTMV;

  try {
    TMV& temp_x = const_cast<TMV &>(X);
    const XTMV tX(rcpFromRef(temp_x));
    XTMV       tY(rcpFromRef(Y));

    tY.putScalar(Teuchos::ScalarTraits<Scalar>::zero());
    if(!Hierarchy_.is_null()) 
      Hierarchy_->Iterate(tX, tY, 1, true);
    else
      Operator_->apply(tX, tY);

  } catch (std::exception& e) {
    std::cerr << "MueLu::TpetraOperator::apply : detected an exception" << std::endl
        << e.what() << std::endl;
    throw;
  }
}

template<class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
bool TpetraOperator<Scalar,LocalOrdinal,GlobalOrdinal,Node>::hasTransposeApply() const {
  return false;
}

template<class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
RCP<MueLu::Hierarchy<Scalar, LocalOrdinal, GlobalOrdinal, Node> >
TpetraOperator<Scalar,LocalOrdinal,GlobalOrdinal,Node>::GetHierarchy() const {
  return Hierarchy_;
}

template<class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
RCP<Xpetra::Operator<Scalar, LocalOrdinal, GlobalOrdinal, Node> >
TpetraOperator<Scalar,LocalOrdinal,GlobalOrdinal,Node>::GetOperator() const {
  return Operator_;
}

} // namespace
#endif //ifdef HAVE_MUELU_TPETRA

#endif //ifdef MUELU_TPETRAOPERATOR_DEF_HPP