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// @HEADER
//
// ***********************************************************************
//
//             Xpetra: A linear algebra interface package
//                  Copyright 2012 Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact
//                    Jonathan Hu       (jhu@sandia.gov)
//                    Andrey Prokopenko (aprokop@sandia.gov)
//                    Ray Tuminaro      (rstumin@sandia.gov)
//
// ***********************************************************************
//
// @HEADER
#ifndef XPETRA_ROWMATRIX_HPP
#define XPETRA_ROWMATRIX_HPP

/* this file is automatically generated - do not edit (see script/interfaces.py) */

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

#include <Teuchos_Describable.hpp>
#include <Kokkos_DefaultNode.hpp>
#include "Xpetra_ConfigDefs.hpp"
#include "Xpetra_Map.hpp"
#include "Xpetra_Vector.hpp"

namespace Xpetra {

  template <class Scalar = Vector<>::scalar_type,
            class LocalOrdinal = Map<>::local_ordinal_type,
            class GlobalOrdinal = typename Map<LocalOrdinal>::global_ordinal_type,
            class Node = typename Map<LocalOrdinal, GlobalOrdinal>::node_type>
  class RowMatrix {
  public:
    typedef Scalar scalar_type;
    typedef LocalOrdinal local_ordinal_type;
    typedef GlobalOrdinal global_ordinal_type;
    typedef Node node_type;

    //! @name Constructor/Destructor Methods
    //@{

    //! Destructor.
    virtual ~RowMatrix() { }

   //@}

    //! @name Matrix Query Methods
    //@{

    //! Returns the Map that describes the row distribution in this matrix.
    virtual const Teuchos::RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > >  getRowMap() const = 0;

    //! Returns the Map that describes the column distribution in this matrix.
    virtual const Teuchos::RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > >  getColMap() const = 0;

    //! Returns the number of global rows in this matrix.
    virtual global_size_t getGlobalNumRows() const = 0;

    //! Returns the number of global columns in this matrix.
    virtual global_size_t getGlobalNumCols() const = 0;

    //! Returns the number of rows owned on the calling node.
    virtual size_t getNodeNumRows() const = 0;

    //! Returns the number of columns needed to apply the forward operator on this node, i.e., the number of elements listed in the column map.
    virtual size_t getNodeNumCols() const = 0;

    //! Returns the global number of entries in this matrix.
    virtual global_size_t getGlobalNumEntries() const = 0;

    //! Returns the local number of entries in this matrix.
    virtual size_t getNodeNumEntries() const = 0;

    //! Returns the current number of entries on this node in the specified local row.
    virtual size_t getNumEntriesInLocalRow(LocalOrdinal localRow) const = 0;

    //! Returns the number of global diagonal entries, based on global row/column index comparisons.
    virtual global_size_t getGlobalNumDiags() const = 0;

    //! Returns the number of local diagonal entries, based on global row/column index comparisons.
    virtual size_t getNodeNumDiags() const = 0;

    //! Returns the maximum number of entries across all rows/columns on all nodes.
    virtual size_t getGlobalMaxNumRowEntries() const = 0;

    //! Returns the maximum number of entries across all rows/columns on this node.
    virtual size_t getNodeMaxNumRowEntries() const = 0;

    //! If matrix indices are in the local range, this function returns true. Otherwise, this function returns false. */.
    virtual bool isLocallyIndexed() const = 0;

    //! If matrix indices are in the global range, this function returns true. Otherwise, this function returns false. */.
    virtual bool isGloballyIndexed() const = 0;

    //! Returns true if fillComplete() has been called.
    virtual bool isFillComplete() const = 0;

    //! Returns true if getLocalRowView() and getGlobalRowView() are valid for this class.
    virtual bool supportsRowViews() const = 0;

    //@}

    //! @name Extraction Methods
    //@{

    //! Extract a list of entries in a specified local row of the graph. Put into storage allocated by calling routine.
    virtual void getLocalRowCopy(LocalOrdinal LocalRow, const Teuchos::ArrayView< LocalOrdinal > &Indices, const Teuchos::ArrayView< Scalar > &Values, size_t &NumEntries) const = 0;

    //! Extract a const, non-persisting view of global indices in a specified row of the matrix.
    virtual void getGlobalRowView(GlobalOrdinal GlobalRow, ArrayView< const GlobalOrdinal > &indices, ArrayView< const Scalar > &values) const = 0;

    //! Extract a const, non-persisting view of local indices in a specified row of the matrix.
    virtual void getLocalRowView(LocalOrdinal LocalRow, ArrayView< const LocalOrdinal > &indices, ArrayView< const Scalar > &values) const = 0;

    //! Get a copy of the diagonal entries owned by this node, with local row indices.
    virtual void getLocalDiagCopy(Vector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &diag) const = 0;

    //@}

    //! @name Mathematical Methods
    //@{

    //! Returns the Frobenius norm of the matrix.
    virtual typename ScalarTraits< Scalar >::magnitudeType getFrobeniusNorm() const = 0;

    //@}

    //! @name Pure virtual functions to be overridden by subclasses.
    //@{

    //! Returns the Map associated with the domain of this operator, which must be compatible with X.getMap().
    virtual const Teuchos::RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > >  getDomainMap() const = 0;

    //! Returns the Map associated with the range of this operator, which must be compatible with Y.getMap().
    virtual const Teuchos::RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > >  getRangeMap() const = 0;

    //! Computes the operator-multivector application.
    virtual 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 = 0;

    //@}

  }; // RowMatrix class

} // Xpetra namespace

#define XPETRA_ROWMATRIX_SHORT
#endif // XPETRA_ROWMATRIX_HPP