MueLu_BelosSmoother_decl.hpp

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#ifndef MUELU_BELOSSMOOTHER_DECL_HPP
#define MUELU_BELOSSMOOTHER_DECL_HPP

#include <Teuchos_ParameterList.hpp>

#include <Xpetra_Matrix_fwd.hpp>
#include <Xpetra_MultiVectorFactory_fwd.hpp>

#include "MueLu_ConfigDefs.hpp"

#if defined(HAVE_MUELU_BELOS)

#include "MueLu_BelosSmoother_fwd.hpp"

#ifdef HAVE_XPETRA_TPETRA
#include "BelosTpetraAdapter.hpp"
#include <Tpetra_Operator.hpp>
#include <Tpetra_MultiVector.hpp>
#endif

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

#include <BelosSolverManager.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 BelosSmoother : public SmootherPrototype<Scalar,LocalOrdinal,GlobalOrdinal,Node> {
#undef MUELU_BELOSSMOOTHER_SHORT
#include "MueLu_UseShortNames.hpp"

  public:


    //TODO: update doc for Belos.
#ifndef _MSC_VER
    // Avoid error C3772: invalid friend template declaration
    template<class Scalar2, class LocalOrdinal2, class GlobalOrdinal2, class Node2>
    friend class BelosSmoother;
#endif

    BelosSmoother(const std::string type, const Teuchos::ParameterList& paramList = Teuchos::ParameterList());

    virtual ~BelosSmoother() = default;


    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;




    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;


    // RCP<Ifpack2::Preconditioner<Scalar,LocalOrdinal,GlobalOrdinal,Node> > getPreconditioner(){return prec_;}

    size_t getNodeSmootherComplexity() const;

  private:
    void SetupBelos           (Level& currentLevel);

  private:

    std::string                         type_;

#ifdef HAVE_MUELU_TPETRA
    typedef Tpetra::MultiVector<SC, LO, GO, NO> tMV;
    typedef Tpetra::Operator<SC, LO, GO, NO>    tOP;
    RCP<Belos::LinearProblem<Scalar, tMV, tOP> > tBelosProblem_;
    RCP<Belos::SolverManager<Scalar, tMV, tOP> > tSolver_;
#endif

    RCP<Matrix> A_;

  }; // class BelosSmoother


  #ifdef HAVE_MUELU_EPETRA

# if ((defined(EPETRA_HAVE_OMP) && (!defined(HAVE_TPETRA_INST_OPENMP) || !defined(HAVE_TPETRA_INST_INT_INT))) || \
    (!defined(EPETRA_HAVE_OMP) && (!defined(HAVE_TPETRA_INST_SERIAL) || !defined(HAVE_TPETRA_INST_INT_INT))))
  // Stub specialization for missing Epetra template args
  template<>
  class BelosSmoother<double,int,int,Xpetra::EpetraNode> : public SmootherPrototype<double,int,int,Xpetra::EpetraNode> {
    typedef double              Scalar;
    typedef int                 LocalOrdinal;
    typedef int                 GlobalOrdinal;
    typedef Xpetra::EpetraNode  Node;
#undef MUELU_BELOSSMOOTHER_SHORT
#include "MueLu_UseShortNames.hpp"

  public:
#ifndef _MSC_VER
    // Avoid error C3772: invalid friend template declaration
    template<class Scalar2, class LocalOrdinal2, class GlobalOrdinal2, class Node2>
    friend class BelosSmoother;
#endif

    BelosSmoother(const std::string& type, const Teuchos::ParameterList& paramList = Teuchos::ParameterList(), const LocalOrdinal& overlap = 0) {
      MUELU_TPETRA_ETI_EXCEPTION("BelosSmoother<double,int,int,EpetraNode>","BelosSmoother<double,int,int,EpetraNode>","int");
    };

    virtual ~BelosSmoother() { }

    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 { return Teuchos::null;}

    std::string description() const { return std::string(""); }
    void print(Teuchos::FancyOStream &out, const VerbLevel verbLevel = Default) const {}

    size_t getNodeSmootherComplexity() const {size_t cplx=0; return cplx;};

  };
# endif

#endif // HAVE_MUELU_EPETRA


} // namespace MueLu

#define MUELU_BELOSSMOOTHER_SHORT
#endif // HAVE_MUELU_BELOS
#endif // MUELU_BELOSSMOOTHER_DECL_HPP