Ifpack2_Details_Amesos2Wrapper_decl.hpp

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// @HEADER
// *****************************************************************************
//       Ifpack2: Templated Object-Oriented Algebraic Preconditioner Package
//
// Copyright 2009 NTESS and the Ifpack2 contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER


#ifndef IFPACK2_DETAILS_AMESOS2WRAPPER_DECL_HPP
#define IFPACK2_DETAILS_AMESOS2WRAPPER_DECL_HPP

#include "Ifpack2_ConfigDefs.hpp"

#ifdef HAVE_IFPACK2_AMESOS2

#include "Ifpack2_Preconditioner.hpp"
#include "Ifpack2_Details_CanChangeMatrix.hpp"
#include "Tpetra_CrsMatrix.hpp"
#include <type_traits>

namespace Teuchos {
  // forward declaration
  class ParameterList;
}

namespace Trilinos {
namespace Details {
  template<class MV, class OP, class NormType>
  class LinearSolver; // forward declaration
} // namespace Details
} // namespace Trilinos


namespace Ifpack2 {
namespace Details {
template<class MatrixType>
class Amesos2Wrapper :
    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:


  typedef typename MatrixType::scalar_type scalar_type;

  typedef typename MatrixType::local_ordinal_type local_ordinal_type;

  typedef typename MatrixType::global_ordinal_type global_ordinal_type;

  typedef typename MatrixType::node_type node_type;

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

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

  static_assert(std::is_same<MatrixType, row_matrix_type>::value,
                "Ifpack2::Details::Amesos2Wrapper: Please use MatrixType = Tpetra::RowMatrix.");

  typedef Tpetra::Map<local_ordinal_type,
                      global_ordinal_type,
                      node_type> map_type;

  typedef Tpetra::CrsMatrix<scalar_type,
                            local_ordinal_type,
                            global_ordinal_type,
                            node_type> crs_matrix_type;


  explicit Amesos2Wrapper (const Teuchos::RCP<const row_matrix_type>& A);

  virtual ~Amesos2Wrapper();



  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 map_type> getDomainMap () const;

  Teuchos::RCP<const map_type> getRangeMap () const;

  bool hasTransposeApply () const;



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

  Teuchos::RCP<const row_matrix_type> getMatrix () const;

  int getNumInitialize () const;

  int getNumCompute () const;

  int getNumApply () const;

  double getInitializeTime () const;

  double getComputeTime () const;

  double getApplyTime () const;



  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;
  typedef typename Teuchos::Array<local_ordinal_type>::size_type size_type;

  typedef Tpetra::MultiVector<scalar_type, local_ordinal_type, global_ordinal_type, node_type> MV;
  typedef Tpetra::Operator<scalar_type, local_ordinal_type, global_ordinal_type, node_type> OP;

  Amesos2Wrapper (const Amesos2Wrapper<MatrixType>& RHS);

  Amesos2Wrapper<MatrixType>& operator= (const Amesos2Wrapper<MatrixType>& RHS);

  Teuchos::RCP<Trilinos::Details::LinearSolver<MV, OP, typename MV::mag_type> > solver_;

  static Teuchos::RCP<const row_matrix_type>
  makeLocalFilter (const Teuchos::RCP<const row_matrix_type>& A);

  //Teuchos::RCP<const MatrixType> A_;
  Teuchos::RCP<const row_matrix_type> A_;

  Teuchos::RCP<const crs_matrix_type> A_local_crs_;

  // \name Parameters (set by setParameters())

  Teuchos::RCP<const Teuchos::ParameterList> parameterList_;

  // \name Other internal data

  double InitializeTime_;
  double ComputeTime_;
  mutable double ApplyTime_;
  int NumInitialize_;
  int NumCompute_;
  mutable int NumApply_;
  bool IsInitialized_;
  bool IsComputed_;
  std::string SolverName_;
}; // class Amesos2Wrapper

} // namespace Details
} // namespace Ifpack2

#endif // HAVE_IFPACK2_AMESOS2

#endif // IFPACK2_DETAILS_AMESOS2WRAPPER_DECL_HPP