Ifpack2_Krylov_decl.hpp

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#ifndef IFPACK2_KRYLOV_DECL_HPP
#define IFPACK2_KRYLOV_DECL_HPP

#include "Ifpack2_ConfigDefs.hpp"
#include "Ifpack2_Preconditioner.hpp"
#include "Ifpack2_Condest.hpp"
#include "Ifpack2_Heap.hpp"
#include "Ifpack2_Parameters.hpp"
#include "Ifpack2_Relaxation.hpp"
#include "Ifpack2_ILUT.hpp"
#include "Ifpack2_RILUK.hpp"
#include "Ifpack2_Chebyshev.hpp"
#include "Ifpack2_Details_CanChangeMatrix.hpp"

#include <BelosConfigDefs.hpp>
#include <BelosSolverManager.hpp>
#include <BelosTpetraAdapter.hpp>
#include <BelosBlockGmresSolMgr.hpp>
#include <BelosBlockCGSolMgr.hpp>

#include <Teuchos_Assert.hpp>
#include <Teuchos_RCP.hpp>
#include <Teuchos_Time.hpp>
#include <Teuchos_TypeNameTraits.hpp>
#include <Teuchos_ScalarTraits.hpp>

#include <iostream>
#include <string>
#include <sstream>
#include <cmath>

namespace Teuchos {
  class ParameterList; // forward declaration
}

namespace Ifpack2 {

  template <typename ScalarType>
  struct BelosScalarType {
    typedef ScalarType type;
  };

  template<class MatrixType>
  class Krylov :
    virtual public Ifpack2::Preconditioner<typename MatrixType::scalar_type,
                                           typename MatrixType::local_ordinal_type,
                                           typename MatrixType::global_ordinal_type,
                                           typename MatrixType::node_type>,
    virtual public Ifpack2::Details::CanChangeMatrix<Tpetra::RowMatrix<typename MatrixType::scalar_type,
                                                                       typename MatrixType::local_ordinal_type,
                                                                       typename MatrixType::global_ordinal_type,
                                                                       typename MatrixType::node_type> >
  {
  public:
    // \name Public typedefs

    typedef typename MatrixType::scalar_type scalar_type;

    typedef typename BelosScalarType<scalar_type>::type belos_scalar_type;

    TEUCHOS_DEPRECATED typedef typename MatrixType::scalar_type Scalar;


    typedef typename MatrixType::local_ordinal_type local_ordinal_type;

    TEUCHOS_DEPRECATED typedef typename MatrixType::local_ordinal_type LocalOrdinal;


    typedef typename MatrixType::global_ordinal_type global_ordinal_type;

    TEUCHOS_DEPRECATED typedef typename MatrixType::global_ordinal_type GlobalOrdinal;


    typedef typename MatrixType::node_type node_type;

    TEUCHOS_DEPRECATED typedef typename MatrixType::node_type Node;


    typedef typename Teuchos::ScalarTraits<scalar_type>::magnitudeType magnitude_type;

    TEUCHOS_DEPRECATED typedef typename Teuchos::ScalarTraits<scalar_type>::magnitudeType magnitudeType;

    typedef Tpetra::RowMatrix<scalar_type,
                              local_ordinal_type,
                              global_ordinal_type,
                              node_type> row_matrix_type;

    typedef Ifpack2::Preconditioner<scalar_type,
                                    local_ordinal_type,
                                    global_ordinal_type,
                                    node_type> prec_type;

    // \name Constructors and Destructors

    explicit Krylov (const Teuchos::RCP<const row_matrix_type>& A);

    virtual ~Krylov ();




    void setParameters (const Teuchos::ParameterList& params);

    void initialize ();

    inline bool isInitialized () const {
      return IsInitialized_;
    }

    void compute ();

    inline bool isComputed() const {
      return IsComputed_;
    }




    virtual void setMatrix (const Teuchos::RCP<const row_matrix_type>& A);




    void
    apply (const Tpetra::MultiVector<scalar_type,local_ordinal_type,global_ordinal_type,node_type>& X,
           Tpetra::MultiVector<scalar_type,local_ordinal_type,global_ordinal_type,node_type>& Y,
           Teuchos::ETransp mode = Teuchos::NO_TRANS,
           scalar_type alpha = Teuchos::ScalarTraits<scalar_type>::one(),
           scalar_type beta = Teuchos::ScalarTraits<scalar_type>::zero()) const;

    Teuchos::RCP<const Tpetra::Map<local_ordinal_type,global_ordinal_type,node_type> > getDomainMap() const;

    Teuchos::RCP<const Tpetra::Map<local_ordinal_type,global_ordinal_type,node_type> > getRangeMap() const;

    bool hasTransposeApply() const;

    virtual magnitude_type TEUCHOS_DEPRECATED getCondEst() const {
      return Condest_;
    }




    Teuchos::RCP<const Teuchos::Comm<int> > getComm() const;

    Teuchos::RCP<const Tpetra::RowMatrix<scalar_type,local_ordinal_type,global_ordinal_type,node_type> > getMatrix() const;

    int getNumInitialize() const;

    int getNumCompute() const;

    int getNumApply() const;

    double getInitializeTime() const;

    double getComputeTime() const;

    double getApplyTime() const;

    virtual magnitude_type TEUCHOS_DEPRECATED
    computeCondEst (CondestType CT = Cheap,
                    local_ordinal_type MaxIters = 1550,
                    magnitude_type Tol = 1e-9,
                    const Teuchos::Ptr<const Tpetra::RowMatrix<scalar_type,local_ordinal_type,global_ordinal_type,node_type> > &Matrix_in = Teuchos::null);



    std::string description() const;

    void describe(Teuchos::FancyOStream &out, const Teuchos::EVerbosityLevel verbLevel=Teuchos::Describable::verbLevel_default) const;


  private:
    typedef Teuchos::ScalarTraits<scalar_type> STS;
    typedef Teuchos::ScalarTraits<magnitude_type> STM;

    Krylov (const Krylov<MatrixType>& RHS);

    Krylov<MatrixType>& operator= (const Krylov<MatrixType>& RHS);

    Teuchos::RCP<const row_matrix_type> A_;


    std::string iterationType_;

    int numIters_;

    magnitude_type resTol_;

    int BlockSize_;

    bool ZeroStartingSolution_;

    // 1 for relaxation
    // 2 for ILUT
    // 3 for RILUK
    // 4 for Chebyshev
    int PreconditionerType_;

    Teuchos::ParameterList precParams_;

    magnitude_type Condest_;
    bool IsInitialized_;
    bool IsComputed_;
    int NumInitialize_;
    int NumCompute_;
    mutable int NumApply_;
    double InitializeTime_;
    double ComputeTime_;
    mutable double ApplyTime_;

    Teuchos::RCP<Belos::LinearProblem<belos_scalar_type,
                                      Tpetra::MultiVector<scalar_type,local_ordinal_type,global_ordinal_type,node_type>,
                                      Tpetra::Operator<scalar_type,local_ordinal_type,global_ordinal_type,node_type> > > belosProblem_;

    Teuchos::RCP<Belos::SolverManager<belos_scalar_type,
                                      Tpetra::MultiVector<scalar_type,local_ordinal_type,global_ordinal_type,node_type>,
                                      Tpetra::Operator<scalar_type,local_ordinal_type,global_ordinal_type,node_type> > > belosSolver_;

    Teuchos::RCP<prec_type> ifpack2_prec_;
  };

} // namespace Ifpack2

#endif // IFPACK2_KRYLOV_DECL_HPP