Ifpack2_ReorderFilter_decl.hpp

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

#ifndef IFPACK2_REORDERFILTER_DECL_HPP
#define IFPACK2_REORDERFILTER_DECL_HPP

#include "Ifpack2_ConfigDefs.hpp"
#include "Ifpack2_Details_RowMatrix.hpp"
#include <type_traits>

namespace Ifpack2 {

template<class MatrixType>
class ReorderFilter :
    virtual public Ifpack2::Details::RowMatrix<MatrixType> {
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 MatrixType::global_inds_host_view_type global_inds_host_view_type;
  typedef typename MatrixType::local_inds_host_view_type local_inds_host_view_type;
  typedef typename MatrixType::values_host_view_type values_host_view_type;

  typedef typename MatrixType::nonconst_global_inds_host_view_type nonconst_global_inds_host_view_type;
  typedef typename MatrixType::nonconst_local_inds_host_view_type nonconst_local_inds_host_view_type;
  typedef typename MatrixType::nonconst_values_host_view_type nonconst_values_host_view_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::ReorderFilter: The template parameter MatrixType must be a Tpetra::RowMatrix specialization.  Please don't use Tpetra::CrsMatrix (a subclass of Tpetra::RowMatrix) here anymore.  The constructor can take either a RowMatrix or a CrsMatrix just fine.");

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

  typedef typename row_matrix_type::mag_type mag_type;



  ReorderFilter (const Teuchos::RCP<const row_matrix_type>& A,
                 const Teuchos::ArrayRCP<local_ordinal_type>& perm,
                 const Teuchos::ArrayRCP<local_ordinal_type>& reverseperm);

  virtual ~ReorderFilter ();



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


  virtual Teuchos::RCP<const map_type> getRowMap() const;

  virtual Teuchos::RCP<const map_type> getColMap() const;

  virtual Teuchos::RCP<const map_type> getDomainMap() const;

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

  virtual Teuchos::RCP<const Tpetra::RowGraph<local_ordinal_type,global_ordinal_type,node_type> > getGraph() const;

  virtual global_size_t getGlobalNumRows() const;

  virtual global_size_t getGlobalNumCols() const;

  virtual size_t getLocalNumRows() const;

  virtual size_t getLocalNumCols() const;

  virtual global_ordinal_type getIndexBase() const;

  virtual global_size_t getGlobalNumEntries() const;

  virtual size_t getLocalNumEntries() const;

  virtual local_ordinal_type getBlockSize () const;

  virtual size_t getNumEntriesInGlobalRow (global_ordinal_type globalRow) const;

  virtual size_t getNumEntriesInLocalRow (local_ordinal_type localRow) const;

  virtual size_t getGlobalMaxNumRowEntries() const;

  virtual size_t getLocalMaxNumRowEntries() const;

  virtual bool hasColMap() const;

  virtual bool isLocallyIndexed() const;

  virtual bool isGloballyIndexed() const;

  virtual bool isFillComplete() const;

  virtual bool supportsRowViews() const;





  virtual void
  getGlobalRowCopy (global_ordinal_type GlobalRow,
                   nonconst_global_inds_host_view_type &Indices,
                   nonconst_values_host_view_type &Values,
                   size_t& NumEntries) const;


  virtual void
  getLocalRowCopy (local_ordinal_type LocalRow,
                   nonconst_local_inds_host_view_type &Indices,
                   nonconst_values_host_view_type &Values,
                   size_t& NumEntries) const;


  virtual void
  getGlobalRowView (global_ordinal_type GlobalRow,
                    global_inds_host_view_type &indices,
                    values_host_view_type &values) const;


  virtual void
  getLocalRowView (local_ordinal_type LocalRow,
                   local_inds_host_view_type & indices,
                   values_host_view_type & values) const;


  virtual void getLocalDiagCopy(Tpetra::Vector<scalar_type,local_ordinal_type,global_ordinal_type,node_type> &diag) const;




  virtual void leftScale(const Tpetra::Vector<scalar_type, local_ordinal_type, global_ordinal_type, node_type>& x);

  virtual void rightScale(const Tpetra::Vector<scalar_type, local_ordinal_type, global_ordinal_type, node_type>& x);


  virtual mag_type getFrobeniusNorm() const;

  virtual 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;

  virtual bool hasTransposeApply() const;

  virtual void permuteOriginalToReordered(const Tpetra::MultiVector<scalar_type,local_ordinal_type,global_ordinal_type,node_type> &originalX,
                                          Tpetra::MultiVector<scalar_type,local_ordinal_type,global_ordinal_type,node_type> &reorderedY) const;

  template <class DomainScalar, class RangeScalar>
  void
  permuteOriginalToReorderedTempl (const Tpetra::MultiVector<DomainScalar,local_ordinal_type,global_ordinal_type,node_type> &originalX,
                                       Tpetra::MultiVector<RangeScalar,local_ordinal_type,global_ordinal_type,node_type> &reorderedY) const;

  virtual void permuteReorderedToOriginal(const Tpetra::MultiVector<scalar_type,local_ordinal_type,global_ordinal_type,node_type> &reorderedX,
                                          Tpetra::MultiVector<scalar_type,local_ordinal_type,global_ordinal_type,node_type> &originalY) const;

  template <class DomainScalar, class RangeScalar>
  void permuteReorderedToOriginalTempl(const Tpetra::MultiVector<DomainScalar,local_ordinal_type,global_ordinal_type,node_type> &reorderedX,
                                       Tpetra::MultiVector<RangeScalar,local_ordinal_type,global_ordinal_type,node_type> &originalY) const;

private:
  Teuchos::RCP<const row_matrix_type> A_;
  Teuchos::ArrayRCP<local_ordinal_type> perm_;
  Teuchos::ArrayRCP<local_ordinal_type> reverseperm_;

  mutable nonconst_local_inds_host_view_type Indices_;
  mutable nonconst_values_host_view_type Values_;
};// class ReorderFilter

}// namespace Ifpack2

#endif /* IFPACK2_REORDERFILTER_DECL_HPP */