Tpetra_CrsMatrixSolveOp_decl.hpp

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//               Tpetra: Templated Linear Algebra Services Package 
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#ifndef TPETRA_CRSMATRIXSOLVEOP_HPP
#define TPETRA_CRSMATRIXSOLVEOP_HPP

#include <Kokkos_DefaultNode.hpp>
#include <Kokkos_DefaultKernels.hpp>
#include "Tpetra_ConfigDefs.hpp"
#include "Tpetra_Operator.hpp"
#include "Tpetra_CrsMatrix.hpp"

namespace Tpetra {

  template <class Scalar, class MatScalar = Scalar, class LocalOrdinal = int, class GlobalOrdinal = LocalOrdinal, class Node = Kokkos::DefaultNode::DefaultNodeType, class LocalMatOps = typename Kokkos::DefaultKernels<MatScalar,LocalOrdinal,Node>::SparseOps >
  class CrsMatrixSolveOp : public Operator<Scalar,LocalOrdinal,GlobalOrdinal,Node> {
    public:


      CrsMatrixSolveOp(const Teuchos::RCP<const CrsMatrix<MatScalar,LocalOrdinal,GlobalOrdinal,Node,LocalMatOps> > &A);

      virtual ~CrsMatrixSolveOp();




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

      bool hasTransposeApply() const;

      const Teuchos::RCP<const Map<LocalOrdinal,GlobalOrdinal,Node> > & getDomainMap() const;

      const Teuchos::RCP<const Map<LocalOrdinal,GlobalOrdinal,Node> > & getRangeMap() const;

    
    protected:
      typedef MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> MV;

      // underlying CrsMatrix
      const Teuchos::RCP<const CrsMatrix<MatScalar,LocalOrdinal,GlobalOrdinal,Node,LocalMatOps> > matrix_;

      // multivectors used for import/export dest/source in apply()
      mutable Teuchos::RCP<MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> > importMV_, exportMV_;

      // private methods for transpose or non-transpose
      void applyNonTranspose(const MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> & X, MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> &Y) const;
      void applyTranspose(const MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> & X, MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> &Y) const;
  };

  template <class Scalar, class MatScalar, class LocalOrdinal, class GlobalOrdinal, class Node, class LocalMatOps>
  Teuchos::RCP< CrsMatrixSolveOp<Scalar,MatScalar,LocalOrdinal,GlobalOrdinal,Node,LocalMatOps> >
  createCrsMatrixSolveOp(const Teuchos::RCP<const CrsMatrix<MatScalar,LocalOrdinal,GlobalOrdinal,Node,LocalMatOps> > &A);

} // end of namespace Tpetra

#endif // TPETRA_CRSMATRIXSOLVEOP_HPP