MueLu_Ifpack2Smoother_decl.hpp

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#ifndef MUELU_IFPACK2SMOOTHER_DECL_HPP
#define MUELU_IFPACK2SMOOTHER_DECL_HPP

#include <Teuchos_ParameterList.hpp>

#include <Xpetra_BlockedCrsMatrix_fwd.hpp>
#include <Xpetra_CrsMatrixWrap.hpp>
#include <Xpetra_Matrix_fwd.hpp>
#include <Xpetra_Matrix.hpp>
#include <Xpetra_MultiVectorFactory_fwd.hpp>
#ifdef HAVE_XPETRA_TPETRA // needed for clone()
#include <Xpetra_TpetraCrsMatrix.hpp>
#endif

#include "MueLu_ConfigDefs.hpp"
#include "MueLu_Ifpack2Smoother_fwd.hpp"

#if defined(HAVE_MUELU_TPETRA) && defined(HAVE_MUELU_IFPACK2)

#include <Tpetra_CrsMatrix.hpp>

#include <Ifpack2_Factory_decl.hpp>
#include <Ifpack2_Factory_def.hpp>
#include <Ifpack2_Preconditioner.hpp>

#include "MueLu_FactoryBase_fwd.hpp"
#include "MueLu_FactoryManagerBase_fwd.hpp"
#include "MueLu_Level_fwd.hpp"
#include "MueLu_SmootherPrototype.hpp"
#include "MueLu_Utilities_fwd.hpp"

namespace MueLu {

  template <class Scalar = SmootherPrototype<>::scalar_type,
            class LocalOrdinal = typename SmootherPrototype<Scalar>::local_ordinal_type,
            class GlobalOrdinal = typename SmootherPrototype<Scalar, LocalOrdinal>::global_ordinal_type,
            class Node = typename SmootherPrototype<Scalar, LocalOrdinal, GlobalOrdinal>::node_type>
  class Ifpack2Smoother : public SmootherPrototype<Scalar,LocalOrdinal,GlobalOrdinal,Node>
  {
#undef MUELU_IFPACK2SMOOTHER_SHORT
#include "MueLu_UseShortNames.hpp"

  public:


    //TODO: update doc for Ifpack2. Right now, it's a copy of the doc of IfpackSmoother
#ifndef _MSC_VER
    // Avoid error C3772: invalid friend template declaration
    template<class Scalar2, class LocalOrdinal2, class GlobalOrdinal2, class Node2>
    friend class Ifpack2Smoother;
#endif

    Ifpack2Smoother(const std::string& type, const Teuchos::ParameterList& paramList = Teuchos::ParameterList(), const LO& overlap = 0); //TODO: empty paramList valid for Ifpack??

    virtual ~Ifpack2Smoother() { }


    void SetParameterList(const Teuchos::ParameterList& paramList);



    void DeclareInput(Level &currentLevel) const;




    void Setup(Level &currentLevel);

    void Apply(MultiVector& X, const MultiVector& B, bool InitialGuessIsZero = false) const;




    RCP<SmootherPrototype> Copy() const;


    template<typename Node2>
    RCP<MueLu::Ifpack2Smoother<Scalar,LocalOrdinal,GlobalOrdinal,Node2> >
    clone(const RCP<Node2>& node2, const Teuchos::RCP<const Xpetra::Matrix<Scalar,LocalOrdinal,GlobalOrdinal,Node2> >& A_newnode) const;



    std::string description() const;

    //using MueLu::Describable::describe; // overloading, not hiding
    //void describe(Teuchos::FancyOStream &out, const VerbLevel verbLevel = Default) const
    void print(Teuchos::FancyOStream &out, const VerbLevel verbLevel = Default) const;


  private:
    void SetPrecParameters(const Teuchos::ParameterList& list = Teuchos::ParameterList()) const;

  private:

    std::string type_;

    LO overlap_;

    RCP<Ifpack2::Preconditioner<Scalar,LocalOrdinal,GlobalOrdinal,Node> > prec_;

    RCP<Matrix> A_;

  }; // class Ifpack2Smoother

  template<class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
  template<typename Node2>
  RCP<MueLu::Ifpack2Smoother<Scalar,LocalOrdinal,GlobalOrdinal,Node2> >
  Ifpack2Smoother<Scalar,LocalOrdinal,GlobalOrdinal,Node>::clone(const RCP<Node2>& node2, const RCP<const Xpetra::Matrix<Scalar,LocalOrdinal,GlobalOrdinal,Node2> >& A_newnode) const {
#ifdef HAVE_XPETRA_TPETRA
    const ParameterList& paramList = this->GetParameterList();
    typedef Tpetra::CrsMatrix<Scalar,LocalOrdinal,GlobalOrdinal,Node> Matrix1;
    typedef Tpetra::CrsMatrix<Scalar,LocalOrdinal,GlobalOrdinal,Node2> Matrix2;
    RCP<Ifpack2Smoother<Scalar, LocalOrdinal, GlobalOrdinal, Node2> > cloneSmoother =
        rcp(new Ifpack2Smoother<Scalar, LocalOrdinal, GlobalOrdinal, Node2>(type_, paramList, overlap_));

    //Get Tpetra::CrsMatrix from Xpetra::Matrix
    RCP<const Xpetra::CrsMatrixWrap<Scalar, LocalOrdinal, GlobalOrdinal, Node2> > crsOp =
        rcp_dynamic_cast<const Xpetra::CrsMatrixWrap<Scalar, LocalOrdinal, GlobalOrdinal, Node2> >(A_newnode);
    const RCP<const Xpetra::TpetraCrsMatrix<Scalar, LocalOrdinal, GlobalOrdinal, Node2> >& tmp =
        rcp_dynamic_cast<const Xpetra::TpetraCrsMatrix<Scalar, LocalOrdinal, GlobalOrdinal, Node2> >(crsOp->getCrsMatrix());

    Ifpack2::Factory factory;
    cloneSmoother->prec_ = factory.clone<Matrix1, Matrix2>(prec_, tmp->getTpetra_CrsMatrix(), paramList);
    cloneSmoother->type_ = type_;
    cloneSmoother->SetParameterList(paramList);
    cloneSmoother->IsSetup(this->IsSetup());
    return cloneSmoother;
#else
    TEUCHOS_TEST_FOR_EXCEPTION(true, Exceptions::RuntimeError,
        "MueLu::Ifpack2Smoother::clone(): clone only available with Tpetra.");
#endif
  }


} // namespace MueLu

#define MUELU_IFPACK2SMOOTHER_SHORT
#endif // HAVE_MUELU_TPETRA && HAVE_MUELU_IFPACK2
#endif // MUELU_IFPACK2SMOOTHER_DECL_HPP