Xpetra_CrsMatrixWrap.hpp

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// WARNING: This code is experimental. Backwards compatibility should not be expected.

#ifndef XPETRA_CRSMATRIXWRAP_HPP
#define XPETRA_CRSMATRIXWRAP_HPP

#include <Kokkos_DefaultNode.hpp>

#include "Xpetra_ConfigDefs.hpp"
#include "Xpetra_Exceptions.hpp"

#include "Xpetra_MultiVector.hpp"
#include "Xpetra_CrsGraph.hpp"
#include "Xpetra_CrsMatrix.hpp"
#include "Xpetra_CrsMatrixFactory.hpp"

#include "Xpetra_Matrix.hpp"

#include <Teuchos_SerialDenseMatrix.hpp>
#include <Teuchos_Hashtable.hpp>

namespace Xpetra {

  typedef std::string viewLabel_t;

template <class Scalar = Matrix<>::scalar_type,
          class LocalOrdinal = typename Matrix<Scalar>::local_ordinal_type,
          class GlobalOrdinal =
            typename Matrix<Scalar, LocalOrdinal>::global_ordinal_type,
          class Node =
            typename Matrix<Scalar, LocalOrdinal, GlobalOrdinal>::node_type>
class CrsMatrixWrap :
  public Matrix<Scalar,LocalOrdinal,GlobalOrdinal,Node>
{
  typedef Xpetra::Map<LocalOrdinal, GlobalOrdinal, Node> Map;
  typedef Xpetra::CrsMatrix<Scalar, LocalOrdinal, GlobalOrdinal, Node> CrsMatrix;
  typedef Xpetra::Matrix<Scalar, LocalOrdinal, GlobalOrdinal, Node> Matrix;
  typedef Xpetra::CrsGraph<LocalOrdinal, GlobalOrdinal, Node> CrsGraph;
#ifdef HAVE_XPETRA_TPETRA
  typedef Xpetra::TpetraCrsMatrix<Scalar, LocalOrdinal, GlobalOrdinal, Node> TpetraCrsMatrix;
#endif
  typedef Xpetra::CrsMatrixFactory<Scalar, LocalOrdinal, GlobalOrdinal, Node> CrsMatrixFactory;
  typedef Xpetra::MatrixView<LocalOrdinal, GlobalOrdinal, Node> MatrixView;
#ifdef HAVE_XPETRA_KOKKOS_REFACTOR
#ifdef HAVE_XPETRA_TPETRA
    typedef typename CrsMatrix::local_matrix_type local_matrix_type;
#endif
#endif

public:


  CrsMatrixWrap (const RCP<const Map>& rowMap,
                 size_t maxNumEntriesPerRow,
                 Xpetra::ProfileType pftype = Xpetra::DynamicProfile)
    : finalDefaultView_ (false)
  {
    matrixData_ = CrsMatrixFactory::Build (rowMap, maxNumEntriesPerRow, pftype);
    CreateDefaultView ();
  }

  CrsMatrixWrap (const RCP<const Map>& rowMap,
                 const ArrayRCP<const size_t>& NumEntriesPerRowToAlloc,
                 ProfileType pftype = Xpetra::DynamicProfile)
    : finalDefaultView_ (false)
  {
    matrixData_ = CrsMatrixFactory::Build(rowMap, NumEntriesPerRowToAlloc, pftype);
    CreateDefaultView ();
  }

  CrsMatrixWrap(const RCP<const Map> &rowMap, const RCP<const Map>& colMap, size_t maxNumEntriesPerRow, Xpetra::ProfileType pftype = Xpetra::DynamicProfile)
    : finalDefaultView_(false)
  {
    // Set matrix data
    matrixData_ = CrsMatrixFactory::Build(rowMap, colMap, maxNumEntriesPerRow, pftype);

    // Default view
    CreateDefaultView();
  }

  CrsMatrixWrap(const RCP<const Map> &rowMap, const RCP<const Map>& colMap, const ArrayRCP<const size_t> &NumEntriesPerRowToAlloc, Xpetra::ProfileType pftype = Xpetra::DynamicProfile)
    : finalDefaultView_(false)
  {
    // Set matrix data
    matrixData_ = CrsMatrixFactory::Build(rowMap, colMap, NumEntriesPerRowToAlloc, pftype);

    // Default view
    CreateDefaultView();
  }

#ifdef HAVE_XPETRA_KOKKOS_REFACTOR
#ifdef HAVE_XPETRA_TPETRA
  CrsMatrixWrap(const RCP<const Map> &rowMap, const RCP<const Map>& colMap, const local_matrix_type& lclMatrix, const Teuchos::RCP<Teuchos::ParameterList>& params = null)
    : finalDefaultView_(false)
  {
    // Set matrix data
    matrixData_ = CrsMatrixFactory::Build(rowMap, colMap, lclMatrix, params);

    // Default view
    CreateDefaultView();
  }
#else
#ifdef __GNUC__
#warning "Xpetra Kokkos interface for CrsMatrix is enabled (HAVE_XPETRA_KOKKOS_REFACTOR) but Tpetra is disabled. The Kokkos interface needs Tpetra to be enabled, too."
#endif
#endif
#endif

  CrsMatrixWrap(RCP<CrsMatrix> matrix)
    : finalDefaultView_(matrix->isFillComplete())
  {
    // Set matrix data
    matrixData_ = matrix;

    // Default view
    CreateDefaultView();
  }

  CrsMatrixWrap(const RCP<const CrsGraph>& graph, const RCP<ParameterList>& paramList = Teuchos::null)
    : finalDefaultView_(false)
  {
    // Set matrix data
    matrixData_ = CrsMatrixFactory::Build(graph, paramList);

    // Default view
    CreateDefaultView();
  }

  virtual ~CrsMatrixWrap() {}






  void insertGlobalValues(GlobalOrdinal globalRow, const ArrayView<const GlobalOrdinal> &cols, const ArrayView<const Scalar> &vals) {
    matrixData_->insertGlobalValues(globalRow, cols, vals);
  }


  void insertLocalValues(LocalOrdinal localRow, const ArrayView<const LocalOrdinal> &cols, const ArrayView<const Scalar> &vals) {
    matrixData_->insertLocalValues(localRow, cols, vals);
  }


  void replaceGlobalValues(GlobalOrdinal globalRow,
                           const ArrayView<const GlobalOrdinal> &cols,
                           const ArrayView<const Scalar>        &vals) { matrixData_->replaceGlobalValues(globalRow, cols, vals); }


  void replaceLocalValues(LocalOrdinal localRow,
                          const ArrayView<const LocalOrdinal> &cols,
                          const ArrayView<const Scalar>       &vals) { matrixData_->replaceLocalValues(localRow, cols, vals); }

  virtual void setAllToScalar(const Scalar &alpha) { matrixData_->setAllToScalar(alpha); }

  void scale(const Scalar &alpha) {
    matrixData_->scale(alpha);
  }




  void resumeFill(const RCP< ParameterList > &params=null) {
    matrixData_->resumeFill(params);
  }

  void fillComplete(const RCP<const Map> &domainMap, const RCP<const Map> &rangeMap, const RCP<Teuchos::ParameterList> &params = null) {
    matrixData_->fillComplete(domainMap, rangeMap, params);

    // Update default view with the colMap because colMap can be <tt>null</tt> until fillComplete() is called.
    updateDefaultView();
  }

  //TODO : Get ride of "Tpetra"::OptimizeOption
  void fillComplete(const RCP<ParameterList> &params = null) {
    matrixData_->fillComplete(params);

    // Update default view with the colMap because colMap can be <tt>null</tt> until fillComplete() is called.
    updateDefaultView();
  }



  global_size_t getGlobalNumRows() const {
    return matrixData_->getGlobalNumRows();
  }


  global_size_t getGlobalNumCols() const {
    return matrixData_->getGlobalNumCols();
  }

  size_t getNodeNumRows() const {
    return matrixData_->getNodeNumRows();
  }

  global_size_t getGlobalNumEntries() const {
    return matrixData_->getGlobalNumEntries();
  }

  size_t getNodeNumEntries() const {
    return matrixData_->getNodeNumEntries();
  }


  size_t getNumEntriesInLocalRow(LocalOrdinal localRow) const {
    return matrixData_->getNumEntriesInLocalRow(localRow);
  }


  global_size_t getGlobalNumDiags() const {
    return matrixData_->getGlobalNumDiags();
  }


  size_t getNodeNumDiags() const {
    return matrixData_->getNodeNumDiags();
  }


  size_t getGlobalMaxNumRowEntries() const {
    return matrixData_->getGlobalMaxNumRowEntries();
  }


  size_t getNodeMaxNumRowEntries() const {
    return matrixData_->getNodeMaxNumRowEntries();
  }

  bool isLocallyIndexed() const {
    return matrixData_->isLocallyIndexed();
  }

  bool isGloballyIndexed() const {
    return matrixData_->isGloballyIndexed();
  }

  bool isFillComplete() const {
    return matrixData_->isFillComplete();
  }


  void getLocalRowCopy(LocalOrdinal LocalRow,
                       const ArrayView<LocalOrdinal> &Indices,
                       const ArrayView<Scalar> &Values,
                       size_t &NumEntries
                       ) const {
    matrixData_->getLocalRowCopy(LocalRow, Indices, Values, NumEntries);
  }


  void getGlobalRowView(GlobalOrdinal GlobalRow, ArrayView<const GlobalOrdinal> &indices, ArrayView<const Scalar> &values) const {
     matrixData_->getGlobalRowView(GlobalRow, indices, values);
  }


  void getLocalRowView(LocalOrdinal LocalRow, ArrayView<const LocalOrdinal> &indices, ArrayView<const Scalar> &values) const {
     matrixData_->getLocalRowView(LocalRow, indices, values);
  }


  void getLocalDiagCopy(Xpetra::Vector<Scalar,LocalOrdinal,GlobalOrdinal,Node> &diag) const {
    matrixData_->getLocalDiagCopy(diag);
  }

  void getLocalDiagOffsets(Teuchos::ArrayRCP<size_t> &offsets) const {
    matrixData_->getLocalDiagOffsets(offsets);
  }

  void getLocalDiagCopy(Xpetra::Vector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &diag, const Teuchos::ArrayView<const size_t> &offsets) const {
    matrixData_->getLocalDiagCopy(diag,offsets);
  }

  typename ScalarTraits<Scalar>::magnitudeType getFrobeniusNorm() const {
    return matrixData_->getFrobeniusNorm();
  }

  void leftScale (const Vector<Scalar, LocalOrdinal, GlobalOrdinal, Node>& x) {
    matrixData_->leftScale(x);
  }

  void rightScale (const Vector<Scalar, LocalOrdinal, GlobalOrdinal, Node>& x) {
    matrixData_->rightScale(x);
  }

  bool haveGlobalConstants() const {
    return matrixData_->haveGlobalConstants();
  }





  //TODO virtual=0 // TODO: Add default parameters ?
//   void multiply(const MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> & X, MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> &Y, Teuchos::ETransp trans, Scalar alpha, Scalar beta) const {
//      matrixData_->multiply(X, Y, trans, alpha, beta);
//   }





  void apply(const Xpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>& X,
                   Xpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>& Y,
                   Teuchos::ETransp mode = Teuchos::NO_TRANS,
                   Scalar alpha = ScalarTraits<Scalar>::one(),
                   Scalar beta = ScalarTraits<Scalar>::zero()) const {

    matrixData_->apply(X,Y,mode,alpha,beta);
  }

  RCP<const Xpetra::Map<LocalOrdinal,GlobalOrdinal,Node> > getDomainMap() const {
    return matrixData_->getDomainMap();
  }

  RCP<const Xpetra::Map<LocalOrdinal,GlobalOrdinal,Node> > getRangeMap() const {
    return matrixData_->getRangeMap();
  }

  const RCP<const Map> & getColMap() const { return getColMap(Matrix::GetCurrentViewLabel()); }

  const RCP<const Map> & getColMap(viewLabel_t viewLabel) const {
    TEUCHOS_TEST_FOR_EXCEPTION(Matrix::operatorViewTable_.containsKey(viewLabel) == false, Xpetra::Exceptions::RuntimeError, "Xpetra::Matrix.GetColMap(): view '" + viewLabel + "' does not exist.");
    updateDefaultView(); // If CrsMatrix::fillComplete() have been used instead of CrsMatrixWrap::fillComplete(), the default view is updated.
    return Matrix::operatorViewTable_.get(viewLabel)->GetColMap();
  }

  void removeEmptyProcessesInPlace(const Teuchos::RCP<const Map>& newMap) {
    matrixData_->removeEmptyProcessesInPlace(newMap);
    this->operatorViewTable_.get(this->GetCurrentViewLabel())->SetRowMap(matrixData_->getRowMap());
    this->operatorViewTable_.get(this->GetCurrentViewLabel())->SetColMap(matrixData_->getColMap());
  }


  //{@

  const Teuchos::RCP< const Xpetra::Map< LocalOrdinal, GlobalOrdinal, Node > > getMap() const {
    return matrixData_->getMap();
  }

  void doImport(const Matrix &source,
                const Xpetra::Import< LocalOrdinal, GlobalOrdinal, Node > &importer, CombineMode CM) {
    const CrsMatrixWrap & sourceWrp = dynamic_cast<const CrsMatrixWrap &>(source);
    matrixData_->doImport(*sourceWrp.getCrsMatrix(), importer, CM);
  }

  void doExport(const Matrix &dest,
                const Xpetra::Import< LocalOrdinal, GlobalOrdinal, Node >& importer, CombineMode CM) {
    const CrsMatrixWrap & destWrp = dynamic_cast<const CrsMatrixWrap &>(dest);
    matrixData_->doExport(*destWrp.getCrsMatrix(), importer, CM);
  }

  void doImport(const Matrix &source,
                const Xpetra::Export< LocalOrdinal, GlobalOrdinal, Node >& exporter, CombineMode CM) {
    const CrsMatrixWrap & sourceWrp = dynamic_cast<const CrsMatrixWrap &>(source);
    matrixData_->doImport(*sourceWrp.getCrsMatrix(), exporter, CM);
  }

  void doExport(const Matrix &dest,
                const Xpetra::Export< LocalOrdinal, GlobalOrdinal, Node >& exporter, CombineMode CM) {
    const CrsMatrixWrap & destWrp = dynamic_cast<const CrsMatrixWrap &>(dest);
    matrixData_->doExport(*destWrp.getCrsMatrix(), exporter, CM);
  }

  // @}



  std::string description() const {
    return "Xpetra::CrsMatrixWrap";
  }

  void describe(Teuchos::FancyOStream &out, const Teuchos::EVerbosityLevel verbLevel=Teuchos::Describable::verbLevel_default) const {
    //     Teuchos::EVerbosityLevel vl = verbLevel;
    //     if (vl == VERB_DEFAULT) vl = VERB_LOW;
    //     RCP<const Comm<int> > comm = this->getComm();
    //     const int myImageID = comm->getRank(),
    //       numImages = comm->getSize();

    //     if (myImageID == 0) out << this->description() << std::endl;

    matrixData_->describe(out,verbLevel);

    // Teuchos::OSTab tab(out);
  }

#ifdef HAVE_XPETRA_KOKKOS_REFACTOR
#ifdef HAVE_XPETRA_TPETRA
  local_matrix_type getLocalMatrix () const {
    return matrixData_->getLocalMatrix();
  }
#else
#ifdef __GNUC__
#warning "Xpetra Kokkos interface for CrsMatrix is enabled (HAVE_XPETRA_KOKKOS_REFACTOR) but Tpetra is disabled. The Kokkos interface needs Tpetra to be enabled, too."
#endif
#endif
#endif

  // JG: Added:

  RCP<const CrsGraph> getCrsGraph() const { return matrixData_->getCrsGraph(); }

  RCP<CrsMatrix> getCrsMatrix() const {  return matrixData_; }


  template<class Node2>
  RCP<Xpetra::Matrix<Scalar,LocalOrdinal,GlobalOrdinal,Node2> > clone(const RCP<Node2> &node2) const {
#ifdef HAVE_XPETRA_TPETRA
    RCP<const Xpetra::TpetraCrsMatrix<Scalar,LocalOrdinal,GlobalOrdinal,Node> > tMatrix =
        Teuchos::rcp_dynamic_cast<const Xpetra::TpetraCrsMatrix<Scalar,LocalOrdinal,GlobalOrdinal,Node> >(matrixData_);
    if (tMatrix == Teuchos::null)
      throw Xpetra::Exceptions::RuntimeError("clone() functionality is only available for Tpetra");

    return RCP<CrsMatrixWrap<Scalar,LocalOrdinal,GlobalOrdinal,Node2> >(new CrsMatrixWrap<Scalar,LocalOrdinal,GlobalOrdinal,Node2>(tMatrix->clone(node2)));
    // TODO: inherit strided maps/views ?
#else
    return Teuchos::null;
#endif
  }

private:

  // Default view is created after fillComplete()
  // Because ColMap might not be available before fillComplete().
  void CreateDefaultView() {

    // Create default view
    this->defaultViewLabel_ = "point";
    this->CreateView(this->GetDefaultViewLabel(), matrixData_->getRowMap(), matrixData_->getColMap());

    // Set current view
    this->currentViewLabel_ = this->GetDefaultViewLabel();
  }

private:

  // The colMap can be <tt>null</tt> until fillComplete() is called. The default view of the Matrix have to be updated when fillComplete() is called.
  // If CrsMatrix::fillComplete() have been used instead of CrsMatrixWrap::fillComplete(), the default view is updated when getColMap() is called.
  void updateDefaultView() const {
    if ((finalDefaultView_ == false) &&  matrixData_->isFillComplete() ) {
      // Update default view with the colMap
      Matrix::operatorViewTable_.get(Matrix::GetDefaultViewLabel())->SetColMap(matrixData_->getColMap());
      finalDefaultView_ = true;
    }
  }
  // The boolean finalDefaultView_ keep track of the status of the default view (= already updated or not)
  // See also CrsMatrixWrap::updateDefaultView()
  mutable bool finalDefaultView_;


  RCP<CrsMatrix> matrixData_;

}; //class Matrix

} //namespace Xpetra

#define XPETRA_CRSMATRIXWRAP_SHORT
#endif //XPETRA_CRSMATRIXWRAP_DECL_HPP

//NOTE: if CrsMatrix and VbrMatrix share a common interface for fillComplete() etc, I can move some stuff in Xpetra_Matrix.hpp
//TODO: getUnderlyingMatrix() method