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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_EPETRAEXPORT_HPP
#define XPETRA_EPETRAEXPORT_HPP

#include "Xpetra_EpetraConfigDefs.hpp"

#include "Xpetra_Export.hpp"

#include "Xpetra_EpetraMap.hpp"//TMP

#include "Epetra_Export.h"

// Note: 'export' is a reserved keyword in C++. Do not use 'export' as a variable name.

namespace Xpetra {

  // TODO: move that elsewhere
  template<class GlobalOrdinal, class Node>
  const Epetra_Export & toEpetra(const Export<int, GlobalOrdinal, Node> &);
  template<class GlobalOrdinal, class Node>
  RCP<const Export<int, GlobalOrdinal, Node> > toXpetra(const Epetra_Export *exp);

  template<class EpetraGlobalOrdinal, class Node>
  class EpetraExportT
    : public Export<int, EpetraGlobalOrdinal, Node>
  {

    typedef int LocalOrdinal;
    typedef EpetraGlobalOrdinal GlobalOrdinal;
    //! The specialization of Map used by this class.
    typedef Map<LocalOrdinal,GlobalOrdinal,Node> map_type;

  public:

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

    //! Construct a Export object from the source and target Map.
    EpetraExportT(const Teuchos::RCP<const map_type> & source, const Teuchos::RCP<const map_type> & target)
      : export_(rcp(new Epetra_Export(toEpetra<GlobalOrdinal,Node>(source), toEpetra<GlobalOrdinal,Node>(target)))) { } // Warning: Epetra(Target, Source) vs. Tpetra(Source, Target)

    ////! Constructor (with list of parameters).
	// Definition not in cpp, so comment out
    // EpetraExportT(const Teuchos::RCP< const map_type > &source, const Teuchos::RCP< const map_type > &target, const Teuchos::RCP< Teuchos::ParameterList > &plist);

    ////! Copy constructor.
	// Definition not in cpp, so comment out
    // EpetraExportT(const Export< LocalOrdinal, GlobalOrdinal, Node > &rhs);

    //! Destructor.
    ~EpetraExportT() { }

    //@}

    //! @name Export Attribute Methods
    //@{

    //! Number of initial identical IDs.
    size_t getNumSameIDs() const { XPETRA_MONITOR("EpetraExportT::getNumSameIDs"); return export_->NumSameIDs(); }

    //! Number of IDs to permute but not to communicate.
    size_t getNumPermuteIDs() const { XPETRA_MONITOR("EpetraExportT::getNumPermuteIDs"); return export_->NumPermuteIDs(); }

    //! List of local IDs in the source Map that are permuted.
    ArrayView< const LocalOrdinal > getPermuteFromLIDs() const {
      XPETRA_MONITOR("EpetraExportT::getPermuteFromLIDs");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO EpetraExportT<EpetraGlobalOrdinal>::getExportImageIDs not implemented"); }


    //! List of local IDs in the target Map that are permuted.
    ArrayView< const LocalOrdinal > getPermuteToLIDs() const {
      XPETRA_MONITOR("EpetraExportT::getPermuteToLIDs");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO EpetraExportT<EpetraGlobalOrdinal>::getPermuteToLIDs not implemented"); }


    //! Number of entries not on the calling process.
    size_t getNumRemoteIDs() const {
      XPETRA_MONITOR("EpetraExportT::getNumRemoteIDs");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO EpetraExportT<EpetraGlobalOrdinal>::getNumRemoteIDs not implemented"); }


    //! List of entries in the target Map to receive from other processes.
    ArrayView< const LocalOrdinal > getRemoteLIDs() const {
      XPETRA_MONITOR("EpetraExportT::getRemoteLIDs");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO EpetraExportT<EpetraGlobalOrdinal>::getRemoteLIDs not implemented"); }


    //! Number of entries that must be sent by the calling process to other processes.
    size_t getNumExportIDs() const {
      XPETRA_MONITOR("EpetraExportT::getNumExportIDs");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO EpetraExportT<EpetraGlobalOrdinal>::getNumExportIDs not implemented"); }


    //! List of entries in the source Map that will be sent to other processes.
    ArrayView< const LocalOrdinal > getExportLIDs() const {
        XPETRA_MONITOR("EpetraExportT::getExportLIDs");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO EpetraExportT<EpetraGlobalOrdinal>::getExportLIDs not implemented"); }


    //! List of processes to which entries will be sent.
    ArrayView< const int > getExportPIDs() const { XPETRA_MONITOR("EpetraExportT::getExportImageIDs"); return ArrayView<const int> (export_->ExportPIDs(),export_->NumExportIDs()); }

    //! The source Map used to construct this Export.
    Teuchos::RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > getSourceMap() const { XPETRA_MONITOR("EpetraExportT::getSourceMap"); return toXpetra<GlobalOrdinal, Node>(export_->SourceMap()); }

    //! The target Map used to construct this Export.
    Teuchos::RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > getTargetMap() const { XPETRA_MONITOR("EpetraExportT::getTargetMap"); return toXpetra<GlobalOrdinal, Node>(export_->TargetMap()); }

    //@}

    //! @name I/O Methods
    //@{

    //! Print the Export's data to the given output stream.
    void print(std::ostream &os) const { XPETRA_MONITOR("EpetraExportT::");  export_->Print(os); }

    //@}

    //! @name Xpetra specific
    //@{

    //! EpetraExportT constructor to wrap a Epetra_Export object
    EpetraExportT(const RCP<const Epetra_Export> &exp) : export_(exp) {  }

    //! Get the underlying Epetra export
    RCP< const Epetra_Export> getEpetra_Export() const { return export_; }

    //@}

  private:

    RCP<const Epetra_Export> export_;

  }; // EpetraExportT class

} // Xpetra namespace

#endif // XPETRA_EPETRAEXPORT_HPP