Xpetra_EpetraIntMultiVector.hpp

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#ifndef XPETRA_EPETRAINTMULTIVECTOR_HPP
#define XPETRA_EPETRAINTMULTIVECTOR_HPP

#include "Xpetra_EpetraConfigDefs.hpp"

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

#include "Xpetra_EpetraMap.hpp"
#include "Xpetra_EpetraMultiVector.hpp"
#include "Epetra_IntMultiVector.h"

namespace Xpetra {

// TODO: move that elsewhere
template<class GlobalOrdinal, class Node>
Epetra_IntMultiVector & toEpetra(MultiVector<int, int, GlobalOrdinal, Node> &);

template<class GlobalOrdinal, class Node>
const Epetra_IntMultiVector & toEpetra(const MultiVector<int, int, GlobalOrdinal, Node> &);
//

  // stub implementation for EpetraIntMultiVectorT
  template<class EpetraGlobalOrdinal, class Node>
  class EpetraIntMultiVectorT
    : public MultiVector<int,int,EpetraGlobalOrdinal, Node>
  {
    typedef int Scalar;
    typedef int LocalOrdinal;
    typedef EpetraGlobalOrdinal GlobalOrdinal;

  public:



    EpetraIntMultiVectorT(const Teuchos::RCP<const Map<LocalOrdinal, GlobalOrdinal, Node> > &map, size_t NumVectors, bool zeroOut=true)  {
      TEUCHOS_TEST_FOR_EXCEPTION(true, Xpetra::Exceptions::RuntimeError,
        "Xpetra::EpetraIntMultiVector only available for GO=int or GO=long long with EpetraNode (Serial or OpenMP depending on configuration)");
    }

    EpetraIntMultiVectorT(const MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &source) {
      TEUCHOS_TEST_FOR_EXCEPTION(true, Xpetra::Exceptions::RuntimeError,
        "Xpetra::EpetraIntMultiVector only available for GO=int or GO=long long with EpetraNode (Serial or OpenMP depending on configuration)");
    }

    EpetraIntMultiVectorT(const Teuchos::RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &map, const Teuchos::ArrayView< const Teuchos::ArrayView< const Scalar > > &ArrayOfPtrs, size_t NumVectors) {
      TEUCHOS_TEST_FOR_EXCEPTION(true, Xpetra::Exceptions::RuntimeError,
        "Xpetra::EpetraIntMultiVector only available for GO=int or GO=long long with EpetraNode (Serial or OpenMP depending on configuration)");
    }

    ~EpetraIntMultiVectorT() {  };




    void putScalar(const int &value) {  }

    void randomize(bool bUseXpetraImplementation = true) { XPETRA_MONITOR("EpetraIntMultiVectorT::randomize"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "Xpetra::EpetraIntMultiVectorT::randomize(): Functionnality not available in Epetra"); }



    void setSeed(unsigned int seed) { XPETRA_MONITOR("EpetraIntMultiVectorT::setSeed");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented,
                                 "Xpetra::EpetraIntMultiVectorT::setSeed(): Functionnality not available in Epetra"); }





    Teuchos::RCP< const Vector< Scalar, LocalOrdinal, GlobalOrdinal, Node > > getVector(size_t j) const {
      return Teuchos::null;
     }

    Teuchos::RCP< Vector< Scalar, LocalOrdinal, GlobalOrdinal, Node > > getVectorNonConst(size_t j) {
      return Teuchos::null;
    }

    Teuchos::ArrayRCP<const int> getData(size_t j) const {
      return Teuchos::ArrayRCP<const int>();
    }

    Teuchos::ArrayRCP<int> getDataNonConst(size_t j) {
      return Teuchos::ArrayRCP<int>();
    }



    void dot(const MultiVector<int,int,GlobalOrdinal,Node> &A,
             const Teuchos::ArrayView<int> &dots) const {
      TEUCHOS_TEST_FOR_EXCEPTION(-1, Xpetra::Exceptions::NotImplemented,
                                 "This function is not implemented in Epetra_IntMultiVector");
    }

    void abs(const MultiVector<int,int,GlobalOrdinal,Node> &A) {  }

    void reciprocal(const MultiVector<int,int,GlobalOrdinal,Node> &A) {
      TEUCHOS_TEST_FOR_EXCEPTION(-1, Xpetra::Exceptions::NotImplemented,
                                 "This function is not implemented in Epetra_IntMultiVector");
    }

    void scale(const int &alpha) {  }

    void scale (Teuchos::ArrayView< const int > alpha) {
      XPETRA_MONITOR("EpetraIntMultiVectorT::scale");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented,
                                 "Xpetra::EpetraIntMultiVectorT::scale(): Functionnality not available in Epetra");
    }

    void update(const int &alpha, const MultiVector<int,int,GlobalOrdinal,Node> &A, const int &beta) {
      XPETRA_MONITOR("EpetraIntMultiVectorT::update");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented,
                                 "Xpetra::EpetraIntMultiVectorT::update(): Functionnality not available in Epetra");
    }

    void update(const int &alpha, const MultiVector<int,int,GlobalOrdinal,Node> &A, const int &beta, const MultiVector<int,int,GlobalOrdinal,Node> &B, const int &gamma) {
      XPETRA_MONITOR("EpetraIntMultiVectorT::update");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented,
                                 "Xpetra::EpetraIntMultiVectorT::update(): Functionnality not available in Epetra");
    }

    void norm1(const Teuchos::ArrayView<Teuchos::ScalarTraits<int>::magnitudeType> &norms) const {
      XPETRA_MONITOR("EpetraIntMultiVectorT::norm1");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented,
                                 "Xpetra::EpetraIntMultiVectorT::norm1(): Functionnality not available in Epetra");
    }

    void norm2(const Teuchos::ArrayView<Teuchos::ScalarTraits<int>::magnitudeType> &norms) const {
      XPETRA_MONITOR("EpetraIntMultiVectorT::norm2");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented,
                                 "Xpetra::EpetraIntMultiVectorT::norm2(): Functionnality not available in Epetra"); }

    void normInf(const Teuchos::ArrayView<Teuchos::ScalarTraits<int>::magnitudeType> &norms) const {
      XPETRA_MONITOR("EpetraIntMultiVectorT::normInf");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented,
                                 "Xpetra::EpetraIntMultiVectorT::normInf(): Functionnality not available in Epetra"); }

    void meanValue(const Teuchos::ArrayView<int> &means) const {
      XPETRA_MONITOR("EpetraIntMultiVectorT::meanValue");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented,
                                 "Xpetra::EpetraIntMultiVectorT::meanValue(): Functionnality not available in Epetra");
    }

    void maxValue(const Teuchos::ArrayView<int> &maxs) const {
      XPETRA_MONITOR("EpetraIntMultiVectorT::maxValue");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented,
                                 "Xpetra::EpetraIntMultiVectorT::maxValue(): Functionnality not available in Epetra");
    }

    void multiply(Teuchos::ETransp transA, Teuchos::ETransp transB, const int &alpha, const MultiVector<int,int,GlobalOrdinal,Node> &A, const MultiVector<int,int,GlobalOrdinal,Node> &B, const int &beta) {
      XPETRA_MONITOR("EpetraIntMultiVectorT::multiply");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented,
                                 "Xpetra::EpetraIntMultiVectorT::multiply(): Functionnality not available in Epetra");
    }

    void elementWiseMultiply(int scalarAB, const Vector<int,int,GlobalOrdinal,Node> &A, const MultiVector<int,int,GlobalOrdinal,Node> &B, int scalarThis) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::elementWiseMultiply");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented,
                                   "Xpetra_EpetraIntMultiVector: elementWiseMultiply not implemented because Epetra_IntMultiVector does not support this operation");
      }




    void replaceGlobalValue(GlobalOrdinal globalRow, size_t vectorIndex, const Scalar &value) {
      XPETRA_MONITOR("EpetraIntMultiVectorT::replaceGlobalValue");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
    }

    void sumIntoGlobalValue(GlobalOrdinal globalRow, size_t vectorIndex, const Scalar &value) {
      XPETRA_MONITOR("EpetraIntMultiVectorT::sumIntoGlobalValue");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
    }

    void replaceLocalValue(LocalOrdinal myRow, size_t vectorIndex, const Scalar &value) {
      XPETRA_MONITOR("EpetraIntMultiVectorT::replaceLocalValue");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
    }

    void sumIntoLocalValue(LocalOrdinal myRow, size_t vectorIndex, const Scalar &value) {
      XPETRA_MONITOR("EpetraIntMultiVectorT::sumIntoLocalValue");
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
    }




    size_t getNumVectors() const { XPETRA_MONITOR("EpetraIntMultiVectorT::getNumVectors"); return 1; }


    size_t getLocalLength() const {  return 0; }

    global_size_t getGlobalLength() const {  return 0; }
   
    bool isSameSize(const MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> & vec) const { return false; }




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

    void describe(Teuchos::FancyOStream &out, const Teuchos::EVerbosityLevel verbLevel=Teuchos::Describable::verbLevel_default) const { }


    RCP< Epetra_IntMultiVector > getEpetra_IntMultiVector() const {  return Teuchos::null; }

    const RCP<const Comm<int> > getComm() const {
      TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO getComm Epetra MultiVector not implemented");
    }

    // Implementing DistObject
    Teuchos::RCP<const Map<int, GlobalOrdinal, Node> > getMap () const {
      return Teuchos::null;
    }

    void doImport(const DistObject<int, int, GlobalOrdinal, Node> &source,
                                    const Import<int, GlobalOrdinal, Node> &importer, CombineMode CM) {  }

    void doExport(const DistObject<int, LocalOrdinal, GlobalOrdinal, Node> &dest,
                                   const Import<int, GlobalOrdinal, Node>& importer, CombineMode CM) {  }

    void doImport(const DistObject<int, LocalOrdinal, GlobalOrdinal, Node> &source,
                                   const Export<int, GlobalOrdinal, Node>& exporter, CombineMode CM) {  }

    void doExport(const DistObject<int, LocalOrdinal, GlobalOrdinal, Node> &dest,
                                   const Export<int, GlobalOrdinal, Node>& exporter, CombineMode CM) {  }

    void replaceMap(const RCP<const Map<int, GlobalOrdinal, Node> >& map) {
      // do nothing
    }



#ifdef HAVE_XPETRA_KOKKOS_REFACTOR
    typedef typename Xpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>::dual_view_type dual_view_type;

    typename dual_view_type::t_host_um getHostLocalView () const {
      throw std::runtime_error("EpetraIntVector does not support device views! Must be implemented extra...");
#ifndef __NVCC__ //prevent nvcc warning
      typename dual_view_type::t_host_um ret;
#endif
      TEUCHOS_UNREACHABLE_RETURN(ret);
    }

    typename dual_view_type::t_dev_um getDeviceLocalView() const {
      throw std::runtime_error("Epetra does not support device views!");
#ifndef __NVCC__ //prevent nvcc warning
      typename dual_view_type::t_dev_um ret;
#endif
      TEUCHOS_UNREACHABLE_RETURN(ret);
    }

    template<class TargetDeviceType>
    typename Kokkos::Impl::if_c<
      std::is_same<
        typename dual_view_type::t_dev_um::execution_space::memory_space,
        typename TargetDeviceType::memory_space>::value,
        typename dual_view_type::t_dev_um,
        typename dual_view_type::t_host_um>::type
    getLocalView () const {
      return this->MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node >::template getLocalView<TargetDeviceType>();
    }
#endif


  protected:
    virtual void
    assign (const MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>& rhs)
    {  }


  private:
    //RCP< Epetra_IntMultiVector > vec_;

  }; // class EpetraIntMultiVectorT

  // specialization on GO=int and Node=Serial
#ifndef XPETRA_EPETRA_NO_32BIT_GLOBAL_INDICES
  template<>
  class EpetraIntMultiVectorT<int, EpetraNode>
    : public virtual MultiVector<int,int,int,EpetraNode>
  {
      typedef int Scalar;
      typedef int LocalOrdinal;
      typedef int GlobalOrdinal;
      typedef EpetraNode Node;

    public:



    EpetraIntMultiVectorT(const Teuchos::RCP<const Map<LocalOrdinal, GlobalOrdinal, Node> > &map, size_t NumVectors, bool zeroOut=true) {
      vec_ = rcp(new Epetra_IntMultiVector(toEpetra<GlobalOrdinal,Node>(map), NumVectors, zeroOut));
    }

    EpetraIntMultiVectorT(const MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &source) {
      vec_ = rcp(new Epetra_IntMultiVector(toEpetra<GlobalOrdinal,Node>(source)));
    }

    EpetraIntMultiVectorT(const Teuchos::RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &/* map */, const Teuchos::ArrayView< const Teuchos::ArrayView< const Scalar > > &/* ArrayOfPtrs */, size_t /* NumVectors */) {
      TEUCHOS_TEST_FOR_EXCEPTION(true, Xpetra::Exceptions::RuntimeError,
        "Xpetra::EpetraIntMultiVector only available for GO=int or GO=long long with EpetraNode (Serial or OpenMP depending on configuration)");
    }

      ~EpetraIntMultiVectorT() {  };




      void putScalar(const int &value) {
        int ierr = 0;
        ierr = vec_->PutScalar(value);
        TEUCHOS_TEST_FOR_EXCEPTION(ierr != 0, Xpetra::Exceptions::RuntimeError, "Epetra_IntMultiVector::PutScalar returned an error.")
      }

      void randomize(bool /* bUseXpetraImplementation */ = true) { XPETRA_MONITOR("EpetraIntMultiVectorT::randomize"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "Xpetra::EpetraIntMultiVectorT::randomize(): Functionnality not available in Epetra"); }



      void setSeed(unsigned int /* seed */) { XPETRA_MONITOR("EpetraIntMultiVectorT::setSeed"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "Xpetra::EpetraIntMultiVectorT::setSeed(): Functionnality not available in Epetra"); }





      Teuchos::RCP< const Vector< Scalar, LocalOrdinal, GlobalOrdinal, Node > > getVector(size_t /* j */) const {
         TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
       }

      Teuchos::RCP< Vector< Scalar, LocalOrdinal, GlobalOrdinal, Node > > getVectorNonConst(size_t /* j */) {
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
      }

      Teuchos::ArrayRCP<const int> getData(size_t j) const {
        XPETRA_MONITOR("EpetraIntMultiVectorT::getData");

        int ** arrayOfPointers;
        vec_->ExtractView(&arrayOfPointers);
        int * data = arrayOfPointers[j];
        int localLength = vec_->MyLength();

        return ArrayRCP<int>(data, 0, localLength, false); // not ownership
      }

      Teuchos::ArrayRCP<int> getDataNonConst(size_t j) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::getDataNonConst");

        int ** arrayOfPointers;
        vec_->ExtractView(&arrayOfPointers);
        int * data = arrayOfPointers[j];
        int localLength = vec_->MyLength();

        return ArrayRCP<int>(data, 0, localLength, false); // not ownership
      }



      void dot(const MultiVector<int,int,GlobalOrdinal,Node> &/* A */,
               const Teuchos::ArrayView<int> &/* dots */) const {
        XPETRA_MONITOR("EpetraIntMultiVectorT::dot");

        //XPETRA_DYNAMIC_CAST(const EpetraMultiVectorT, A, eA, "This Xpetra::EpetraMultiVectorT method only accept Xpetra::EpetraMultiVectorT as input arguments.");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented,
                                   "This function is not implemented in Epetra_IntMultiVector");
      }

      void abs(const MultiVector<int,int,GlobalOrdinal,Node> &/* A */) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::abs");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented,
                                   "This function is not available in Epetra_IntMultiVector");
      }

      void reciprocal(const MultiVector<int,int,GlobalOrdinal,Node> &/* A */) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::reciprocal");

        //XPETRA_DYNAMIC_CAST(const EpetraMultiVectorT, A, eA, "This Xpetra::EpetraMultiVectorT method only accept Xpetra::EpetraMultiVectorT as input arguments.");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::RuntimeError, "The reciprocal of an IntMultiVector is not defined!");
      }

      void scale(const int &/* alpha */) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::scale");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
      }

      void scale (Teuchos::ArrayView< const int > /* alpha */) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::scale");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
      }

      void update(const int &/* alpha */, const MultiVector<int,int,GlobalOrdinal,Node> &/* A */, const int &/* beta */) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::update");

        // XPETRA_DYNAMIC_CAST(const EpetraMultiVectorT, A, eA, "This Xpetra::EpetraMultiVectorT method only accept Xpetra::EpetraMultiVectorT as input arguments.");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
      }

      void update(const int &/* alpha */, const MultiVector<int,int,GlobalOrdinal,Node> &/* A */, const int &/* beta */, const MultiVector<int,int,GlobalOrdinal,Node> &/* B */, const int &/* gamma */) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::update");

        //XPETRA_DYNAMIC_CAST(const EpetraMultiVectorT, A, eA, "This Xpetra::EpetraMultiVectorT method only accept Xpetra::EpetraMultiVectorT as input arguments.");
        //XPETRA_DYNAMIC_CAST(const EpetraMultiVectorT, B, eB, "This Xpetra::EpetraMultiVectorT method only accept Xpetra::EpetraMultiVectorT as input arguments.");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
      }

      void norm1(const Teuchos::ArrayView<Teuchos::ScalarTraits<int>::magnitudeType> &/* norms */) const { XPETRA_MONITOR("EpetraIntMultiVectorT::norm1"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

      void norm2(const Teuchos::ArrayView<Teuchos::ScalarTraits<int>::magnitudeType> &/* norms */) const { XPETRA_MONITOR("EpetraIntMultiVectorT::norm2"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

      void normInf(const Teuchos::ArrayView<Teuchos::ScalarTraits<int>::magnitudeType> &/* norms */) const { XPETRA_MONITOR("EpetraIntMultiVectorT::normInf"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

      void meanValue(const Teuchos::ArrayView<int> &/* means */) const { XPETRA_MONITOR("EpetraIntMultiVectorT::meanValue"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

      void maxValue(const Teuchos::ArrayView<int> &/* maxs */) const { XPETRA_MONITOR("EpetraIntMultiVectorT::maxValue"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

      void multiply(Teuchos::ETransp /* transA */, Teuchos::ETransp /* transB */, const int &/* alpha */, const MultiVector<int,int,GlobalOrdinal,Node> &/* A */, const MultiVector<int,int,GlobalOrdinal,Node> &/* B */, const int &/* beta */) { XPETRA_MONITOR("EpetraIntMultiVectorT::multiply"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "Not available in Epetra"); }

      void elementWiseMultiply(int /* scalarAB */, const Vector<int,int,GlobalOrdinal,Node> &/* A */, const MultiVector<int,int,GlobalOrdinal,Node> &/* B */, int /* scalarThis */) {
          XPETRA_MONITOR("EpetraIntMultiVectorT::elementWiseMultiply");
          TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "Xpetra_EpetraIntMultiVector: elementWiseMultiply not implemented because Epetra_IntMultiVector does not support this operation");
        }




      void replaceGlobalValue(GlobalOrdinal globalRow, size_t vectorIndex, const Scalar &value) {
        vec_->ReplaceGlobalValue(globalRow, vectorIndex, value);
      }

      void sumIntoGlobalValue(GlobalOrdinal globalRow, size_t vectorIndex, const Scalar &value) {
        vec_->SumIntoGlobalValue(globalRow, vectorIndex, value);
      }

      void replaceLocalValue(LocalOrdinal myRow, size_t vectorIndex, const Scalar &value) {
        vec_->ReplaceMyValue(myRow, vectorIndex, value);
      }

      void sumIntoLocalValue(LocalOrdinal myRow, size_t vectorIndex, const Scalar &value) {
        vec_->SumIntoMyValue(myRow, vectorIndex, value);
      }




      size_t getNumVectors() const {
        return vec_->NumVectors();
      }


      size_t getLocalLength() const {
        return vec_->MyLength();
      }

      global_size_t getGlobalLength() const {  return vec_->GlobalLength64(); }

      bool isSameSize(const MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> & vec) const { 
        XPETRA_MONITOR("EpetraIntMultiVectorT::isSameSize");
        auto vv = toEpetra<GlobalOrdinal,Node>(vec);
        return ( (getLocalLength() == Teuchos::as<size_t>(vv.MyLength())) &&
                 (getNumVectors() == Teuchos::as<size_t>(vv.NumVectors())));
      }




      std::string description() const {
        XPETRA_MONITOR("EpetraIntMultiVectorT::description");

        // This implementation come from Epetra_Vector_def.hpp (without modification)
        std::ostringstream oss;
        oss << Teuchos::Describable::description();
        oss << "{length="<<this->getGlobalLength()
            << "}";
        return oss.str();
      }

      void describe(Teuchos::FancyOStream &out, const Teuchos::EVerbosityLevel verbLevel=Teuchos::Describable::verbLevel_default) const {
         XPETRA_MONITOR("EpetraIntMultiVectorT::describe");

         // This implementation come from Tpetra_Vector_def.hpp (without modification) // JG: true?
         using std::endl;
         using std::setw;
         using Teuchos::VERB_DEFAULT;
         using Teuchos::VERB_NONE;
         using Teuchos::VERB_LOW;
         using Teuchos::VERB_MEDIUM;
         using Teuchos::VERB_HIGH;
         using Teuchos::VERB_EXTREME;

         if (verbLevel > Teuchos::VERB_NONE)
           vec_->Print(out);
       }


      RCP< Epetra_IntMultiVector > getEpetra_IntMultiVector() const {  return vec_; }

      const RCP<const Comm<int> > getComm() const {
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO getComm Epetra MultiVector not implemented");
      }

      // Implementing DistObject
      Teuchos::RCP<const Map<int, GlobalOrdinal, Node> > getMap () const {
        RCP<const Epetra_BlockMap> map = rcp(new Epetra_BlockMap(vec_->Map()));
        return rcp (new Xpetra::EpetraMapT<GlobalOrdinal, Node>(map));
      }

      void doImport(const DistObject<int, int, GlobalOrdinal, Node> &source,
                                      const Import<int, GlobalOrdinal, Node> &importer, CombineMode CM) {
         XPETRA_MONITOR("EpetraIntMultiVectorT::doImport");

         XPETRA_DYNAMIC_CAST(const EpetraIntMultiVectorT<GlobalOrdinal XPETRA_COMMA Node>, source, tSource, "Xpetra::EpetraIntMultiVectorT::doImport only accept Xpetra::EpetraIntMultiVectorT as input arguments.");
         XPETRA_DYNAMIC_CAST(const EpetraImportT<GlobalOrdinal XPETRA_COMMA Node>, importer, tImporter, "Xpetra::EpetraIntMultiVectorT::doImport only accept Xpetra::EpetraImportT as input arguments.");

         const Epetra_IntMultiVector & v = *tSource.getEpetra_IntMultiVector();
         int err = vec_->Import(v, *tImporter.getEpetra_Import(), toEpetra(CM));
         TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");
       }

      void doExport(const DistObject<int, LocalOrdinal, GlobalOrdinal, Node> &dest,
                                     const Import<int, GlobalOrdinal, Node>& importer, CombineMode CM) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::doExport");

        XPETRA_DYNAMIC_CAST(const EpetraIntMultiVectorT<GlobalOrdinal XPETRA_COMMA Node>, dest, tDest, "Xpetra::EpetraIntMultiVectorT::doImport only accept Xpetra::EpetraIntMultiVectorT as input arguments.");
        XPETRA_DYNAMIC_CAST(const EpetraImportT<GlobalOrdinal XPETRA_COMMA Node>, importer, tImporter, "Xpetra::EpetraIntMultiVectorT::doImport only accept Xpetra::EpetraImportT as input arguments.");

        const Epetra_IntMultiVector & v = *tDest.getEpetra_IntMultiVector();
        int err = vec_->Import(v, *tImporter.getEpetra_Import(), toEpetra(CM));
        TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");
      }

      void doImport(const DistObject<int, LocalOrdinal, GlobalOrdinal, Node> &source,
                                     const Export<int, GlobalOrdinal, Node>& exporter, CombineMode CM) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::doImport");

        XPETRA_DYNAMIC_CAST(const EpetraIntMultiVectorT<GlobalOrdinal XPETRA_COMMA Node>, source, tSource, "Xpetra::EpetraIntMultiVectorT::doImport only accept Xpetra::EpetraIntMultiVectorT as input arguments.");
        XPETRA_DYNAMIC_CAST(const EpetraExportT<GlobalOrdinal XPETRA_COMMA Node>, exporter, tExporter, "Xpetra::EpetraIntMultiVectorT::doImport only accept Xpetra::EpetraImportT as input arguments.");

        const Epetra_IntMultiVector & v = *tSource.getEpetra_IntMultiVector();
        int err = vec_->Import(v, *tExporter.getEpetra_Export(), toEpetra(CM));
        TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");
      }

      void doExport(const DistObject<int, LocalOrdinal, GlobalOrdinal, Node> &dest,
                                     const Export<int, GlobalOrdinal, Node>& exporter, CombineMode CM) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::doExport");

        XPETRA_DYNAMIC_CAST(const EpetraIntMultiVectorT<GlobalOrdinal XPETRA_COMMA Node>, dest, tDest, "Xpetra::EpetraIntMultiVectorT::doImport only accept Xpetra::EpetraIntMultiVectorT as input arguments.");
        XPETRA_DYNAMIC_CAST(const EpetraExportT<GlobalOrdinal XPETRA_COMMA Node>, exporter, tExporter, "Xpetra::EpetraIntMultiVectorT::doImport only accept Xpetra::EpetraImportT as input arguments.");

        const Epetra_IntMultiVector & v = *tDest.getEpetra_IntMultiVector();
        int err = vec_->Export(v, *tExporter.getEpetra_Export(), toEpetra(CM));
        TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");
      }

      void replaceMap(const RCP<const Map<int, GlobalOrdinal, Node> >& map) {
      XPETRA_MONITOR("EpetraIntMultiVectorT::replaceMap");
      int err = 0;
      if (!map.is_null()) {
        err = this->getEpetra_IntMultiVector()->ReplaceMap(toEpetra<GlobalOrdinal,Node>(map));

      } else {
        // Replace map with a dummy map to avoid potential hangs later
        Epetra_SerialComm SComm;
        Epetra_Map NewMap((GlobalOrdinal) vec_->MyLength(), (GlobalOrdinal) vec_->Map().IndexBase64(), SComm);
        err = this->getEpetra_IntMultiVector()->ReplaceMap(NewMap);
      }
      TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");
      }



  #ifdef HAVE_XPETRA_KOKKOS_REFACTOR
      typedef typename Xpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>::dual_view_type dual_view_type;

      typename dual_view_type::t_host_um getHostLocalView () const {
        typedef Kokkos::View< typename dual_view_type::t_host::data_type ,
                      Kokkos::LayoutLeft,
                      typename dual_view_type::t_host::device_type ,
                      Kokkos::MemoryUnmanaged> epetra_view_type;

        // access Epetra vector data
        int* data = NULL;
        int myLDA;
        vec_->ExtractView(&data, &myLDA);
        int localLength = vec_->MyLength();
        int numVectors  = vec_->NumVectors();

        // create view
        epetra_view_type test = epetra_view_type(data, localLength, numVectors);
        typename dual_view_type::t_host_um ret = subview(test, Kokkos::ALL(), Kokkos::ALL());

        return ret;
      }

      typename dual_view_type::t_dev_um getDeviceLocalView() const {
        throw std::runtime_error("Epetra does not support device views!");
#ifndef __NVCC__ //prevent nvcc warning
        typename dual_view_type::t_dev_um ret;
#endif
        TEUCHOS_UNREACHABLE_RETURN(ret);
      }

      template<class TargetDeviceType>
      typename Kokkos::Impl::if_c<
        std::is_same<
          typename dual_view_type::t_dev_um::execution_space::memory_space,
          typename TargetDeviceType::memory_space>::value,
          typename dual_view_type::t_dev_um,
          typename dual_view_type::t_host_um>::type
      getLocalView () const {
        return this->MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node >::template getLocalView<TargetDeviceType>();
      }
  #endif


    protected:
      virtual void
      assign (const MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>& rhs)
      {
        typedef EpetraIntMultiVectorT<GlobalOrdinal, Node> this_type;
        const this_type* rhsPtr = dynamic_cast<const this_type*> (&rhs);
        TEUCHOS_TEST_FOR_EXCEPTION(
          rhsPtr == NULL, std::invalid_argument, "Xpetra::MultiVector::operator=: "
          "The left-hand side (LHS) of the assignment has a different type than "
          "the right-hand side (RHS).  The LHS has type Xpetra::EpetraIntMultiVectorT "
          "(which means it wraps an Epetra_IntMultiVector), but the RHS has some "
          "other type.  This probably means that the RHS wraps either an "
          "Tpetra::MultiVector, or an Epetra_MultiVector.  Xpetra::MultiVector "
          "does not currently implement assignment from a Tpetra object to an "
          "Epetra object, though this could be added with sufficient interest.");

        RCP<const Epetra_IntMultiVector> rhsImpl = rhsPtr->getEpetra_IntMultiVector ();
        RCP<Epetra_IntMultiVector> lhsImpl = this->getEpetra_IntMultiVector ();

        TEUCHOS_TEST_FOR_EXCEPTION(
          rhsImpl.is_null (), std::logic_error, "Xpetra::MultiVector::operator= "
          "(in Xpetra::EpetraIntMultiVectorT::assign): *this (the right-hand side of "
          "the assignment) has a null RCP<Epetra_IntMultiVector> inside.  Please "
          "report this bug to the Xpetra developers.");
        TEUCHOS_TEST_FOR_EXCEPTION(
          lhsImpl.is_null (), std::logic_error, "Xpetra::MultiVector::operator= "
          "(in Xpetra::EpetraIntMultiVectorT::assign): The left-hand side of the "
          "assignment has a null RCP<Epetra_IntMultiVector> inside.  Please report "
          "this bug to the Xpetra developers.");

        // Epetra_IntMultiVector's assignment operator does a deep copy.
        *lhsImpl = *rhsImpl;
      }


    private:
      RCP< Epetra_IntMultiVector > vec_;
  };
#endif

  // specialization on GO=long long and Node=Serial
#ifndef XPETRA_EPETRA_NO_64BIT_GLOBAL_INDICES
  template<>
  class EpetraIntMultiVectorT<long long, EpetraNode>
    : public virtual MultiVector<int,int,long long,EpetraNode>
  {
      typedef int Scalar;
      typedef int LocalOrdinal;
      typedef long long GlobalOrdinal;
      typedef EpetraNode Node;

    public:



    EpetraIntMultiVectorT(const Teuchos::RCP<const Map<LocalOrdinal, GlobalOrdinal, Node> > &map, size_t NumVectors, bool zeroOut=true) {
      vec_ = rcp(new Epetra_IntMultiVector(toEpetra<GlobalOrdinal,Node>(map), NumVectors, zeroOut));
    }

    EpetraIntMultiVectorT(const MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &source) {
      vec_ = rcp(new Epetra_IntMultiVector(toEpetra<GlobalOrdinal,Node>(source)));
    }

    EpetraIntMultiVectorT(const Teuchos::RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &/* map */, const Teuchos::ArrayView< const Teuchos::ArrayView< const Scalar > > &/* ArrayOfPtrs */, size_t /* NumVectors */) {
      TEUCHOS_TEST_FOR_EXCEPTION(true, Xpetra::Exceptions::RuntimeError,
        "Xpetra::EpetraIntMultiVector only available for GO=int or GO=long long with EpetraNode (Serial or OpenMP depending on configuration)");
    }

      ~EpetraIntMultiVectorT() {  };




      void putScalar(const int &value) {
        int ierr = 0;
        ierr = vec_->PutScalar(value);
        TEUCHOS_TEST_FOR_EXCEPTION(ierr != 0, Xpetra::Exceptions::RuntimeError, "Epetra_IntMultiVector::PutScalar returns a non zero error.");
      }

      void randomize(bool /* bUseXpetraImplementation */ = true) { XPETRA_MONITOR("EpetraIntMultiVectorT::randomize"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "Xpetra::EpetraIntMultiVectorT::randomize(): Functionnality not available in Epetra"); }



      void setSeed(unsigned int /* seed */) { XPETRA_MONITOR("EpetraIntMultiVectorT::setSeed"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "Xpetra::EpetraIntMultiVectorT::setSeed(): Functionnality not available in Epetra"); }





      Teuchos::RCP< const Vector< Scalar, LocalOrdinal, GlobalOrdinal, Node > > getVector(size_t /* j */) const {
         TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
       }

      Teuchos::RCP< Vector< Scalar, LocalOrdinal, GlobalOrdinal, Node > > getVectorNonConst(size_t /* j */) {
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
      }

      Teuchos::ArrayRCP<const int> getData(size_t j) const {
        XPETRA_MONITOR("EpetraIntMultiVectorT::getData");

        int ** arrayOfPointers;
        vec_->ExtractView(&arrayOfPointers);
        int * data = arrayOfPointers[j];
        int localLength = vec_->MyLength();

        return ArrayRCP<int>(data, 0, localLength, false); // not ownership
      }

      Teuchos::ArrayRCP<int> getDataNonConst(size_t j) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::getDataNonConst");

        int ** arrayOfPointers;
        vec_->ExtractView(&arrayOfPointers);
        int * data = arrayOfPointers[j];
        int localLength = vec_->MyLength();

        return ArrayRCP<int>(data, 0, localLength, false); // not ownership
      }



      void dot(const MultiVector<int,int,GlobalOrdinal,Node> &/* A */,
               const Teuchos::ArrayView<int> &/* dots */) const {
        XPETRA_MONITOR("EpetraIntMultiVectorT::dot");

        //XPETRA_DYNAMIC_CAST(const EpetraMultiVectorT, A, eA, "This Xpetra::EpetraMultiVectorT method only accept Xpetra::EpetraMultiVectorT as input arguments.");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
      }

      void abs(const MultiVector<int,int,GlobalOrdinal,Node> &/* A */) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::abs");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented,
                                   "This function is not available in Epetra_IntMultiVector");
      }

      void reciprocal(const MultiVector<int,int,GlobalOrdinal,Node> &/* A */) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::reciprocal");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented,
                                   "This function is not implemented in Epetra_IntMultiVector");
      }

      void scale(const int &/* alpha */) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::scale");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
      }

      void scale (Teuchos::ArrayView< const int > /* alpha */) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::scale");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
      }

      void update(const int &/* alpha */, const MultiVector<int,int,GlobalOrdinal,Node> &/* A */, const int &/* beta */) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::update");

        // XPETRA_DYNAMIC_CAST(const EpetraMultiVectorT, A, eA, "This Xpetra::EpetraMultiVectorT method only accept Xpetra::EpetraMultiVectorT as input arguments.");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
      }

      void update(const int &/* alpha */, const MultiVector<int,int,GlobalOrdinal,Node> &/* A */, const int &/* beta */, const MultiVector<int,int,GlobalOrdinal,Node> &/* B */, const int &/* gamma */) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::update");

        //XPETRA_DYNAMIC_CAST(const EpetraMultiVectorT, A, eA, "This Xpetra::EpetraMultiVectorT method only accept Xpetra::EpetraMultiVectorT as input arguments.");
        //XPETRA_DYNAMIC_CAST(const EpetraMultiVectorT, B, eB, "This Xpetra::EpetraMultiVectorT method only accept Xpetra::EpetraMultiVectorT as input arguments.");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO");
      }

      void norm1(const Teuchos::ArrayView<Teuchos::ScalarTraits<int>::magnitudeType> &/* norms */) const { XPETRA_MONITOR("EpetraIntMultiVectorT::norm1"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

      void norm2(const Teuchos::ArrayView<Teuchos::ScalarTraits<int>::magnitudeType> &/* norms */) const { XPETRA_MONITOR("EpetraIntMultiVectorT::norm2"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

      void normInf(const Teuchos::ArrayView<Teuchos::ScalarTraits<int>::magnitudeType> &/* norms */) const { XPETRA_MONITOR("EpetraIntMultiVectorT::normInf"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

      void meanValue(const Teuchos::ArrayView<int> &/* means */) const { XPETRA_MONITOR("EpetraIntMultiVectorT::meanValue"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

      void maxValue(const Teuchos::ArrayView<int> &/* maxs */) const { XPETRA_MONITOR("EpetraIntMultiVectorT::maxValue"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

      void multiply(Teuchos::ETransp /* transA */, Teuchos::ETransp /* transB */, const int &/* alpha */, const MultiVector<int,int,GlobalOrdinal,Node> &/* A */, const MultiVector<int,int,GlobalOrdinal,Node> &/* B */, const int &/* beta */) { XPETRA_MONITOR("EpetraIntMultiVectorT::multiply"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "Not available in Epetra"); }

      void elementWiseMultiply(int /* scalarAB */, const Vector<int,int,GlobalOrdinal,Node> &/* A */, const MultiVector<int,int,GlobalOrdinal,Node> &/* B */, int /* scalarThis */) {
          XPETRA_MONITOR("EpetraIntMultiVectorT::elementWiseMultiply");
          TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "Xpetra_EpetraIntMultiVector: elementWiseMultiply not implemented because Epetra_IntMultiVector does not support this operation");
        }




      void replaceGlobalValue(GlobalOrdinal globalRow, size_t vectorIndex, const Scalar &value) {
        vec_->ReplaceGlobalValue(globalRow, vectorIndex, value);
      }

      void sumIntoGlobalValue(GlobalOrdinal globalRow, size_t vectorIndex, const Scalar &value) {
        vec_->SumIntoGlobalValue(globalRow, vectorIndex, value);
      }

      void replaceLocalValue(LocalOrdinal myRow, size_t vectorIndex, const Scalar &value) {
        vec_->ReplaceMyValue(myRow, vectorIndex, value);
      }

      void sumIntoLocalValue(LocalOrdinal myRow, size_t vectorIndex, const Scalar &value) {
        vec_->SumIntoMyValue(myRow, vectorIndex, value);
      }




      size_t getNumVectors() const {
        return vec_->NumVectors();
      }


      size_t getLocalLength() const {  return vec_->MyLength(); }

      global_size_t getGlobalLength() const {  return vec_->GlobalLength64(); }


      bool isSameSize(const MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> & vec) const {
        XPETRA_MONITOR("EpetraIntMultiVectorT::isSameSize");
        auto vv = toEpetra<GlobalOrdinal, Node>(vec);
        return ( (getLocalLength() == Teuchos::as<size_t>(vv.MyLength())) &&
                 (getNumVectors() == Teuchos::as<size_t>(vv.NumVectors())));
      }



      std::string description() const {
        XPETRA_MONITOR("EpetraIntMultiVectorT::description");

        // This implementation come from Epetra_Vector_def.hpp (without modification)
        std::ostringstream oss;
        oss << Teuchos::Describable::description();
        oss << "{length="<<this->getGlobalLength()
            << "}";
        return oss.str();
      }

      void describe(Teuchos::FancyOStream &out, const Teuchos::EVerbosityLevel verbLevel=Teuchos::Describable::verbLevel_default) const {
         XPETRA_MONITOR("EpetraIntMultiVectorT::describe");

         // This implementation come from Tpetra_Vector_def.hpp (without modification) // JG: true?
         using std::endl;
         using std::setw;
         using Teuchos::VERB_DEFAULT;
         using Teuchos::VERB_NONE;
         using Teuchos::VERB_LOW;
         using Teuchos::VERB_MEDIUM;
         using Teuchos::VERB_HIGH;
         using Teuchos::VERB_EXTREME;

         if (verbLevel > Teuchos::VERB_NONE)
           vec_->Print(out);
       }


      RCP< Epetra_IntMultiVector > getEpetra_IntMultiVector() const {  return vec_; }

      const RCP<const Comm<int> > getComm() const {
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO getComm Epetra MultiVector not implemented");
      }

      // Implementing DistObject
      Teuchos::RCP<const Map<int, GlobalOrdinal, Node> > getMap () const {
        RCP<const Epetra_BlockMap> map = rcp(new Epetra_BlockMap(vec_->Map()));
        return rcp (new Xpetra::EpetraMapT<GlobalOrdinal, Node>(map));
      }

      void doImport(const DistObject<int, int, GlobalOrdinal, Node> &source,
                                      const Import<int, GlobalOrdinal, Node> &importer, CombineMode CM) {
         XPETRA_MONITOR("EpetraIntMultiVectorT::doImport");

         XPETRA_DYNAMIC_CAST(const EpetraIntMultiVectorT<GlobalOrdinal XPETRA_COMMA Node>, source, tSource, "Xpetra::EpetraIntMultiVectorT::doImport only accept Xpetra::EpetraIntMultiVectorT as input arguments.");
         XPETRA_DYNAMIC_CAST(const EpetraImportT<GlobalOrdinal XPETRA_COMMA Node>, importer, tImporter, "Xpetra::EpetraIntMultiVectorT::doImport only accept Xpetra::EpetraImportT as input arguments.");

         const Epetra_IntMultiVector & v = *tSource.getEpetra_IntMultiVector();
         int err = vec_->Import(v, *tImporter.getEpetra_Import(), toEpetra(CM));
         TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");
       }

      void doExport(const DistObject<int, LocalOrdinal, GlobalOrdinal, Node> &dest,
                                     const Import<int, GlobalOrdinal, Node>& importer, CombineMode CM) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::doExport");

        XPETRA_DYNAMIC_CAST(const EpetraIntMultiVectorT<GlobalOrdinal XPETRA_COMMA Node>, dest, tDest, "Xpetra::EpetraIntMultiVectorT::doImport only accept Xpetra::EpetraIntMultiVectorT as input arguments.");
        XPETRA_DYNAMIC_CAST(const EpetraImportT<GlobalOrdinal XPETRA_COMMA Node>, importer, tImporter, "Xpetra::EpetraIntMultiVectorT::doImport only accept Xpetra::EpetraImportT as input arguments.");

        const Epetra_IntMultiVector & v = *tDest.getEpetra_IntMultiVector();
        int err = vec_->Import(v, *tImporter.getEpetra_Import(), toEpetra(CM));
        TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");
      }

      void doImport(const DistObject<int, LocalOrdinal, GlobalOrdinal, Node> &source,
                                     const Export<int, GlobalOrdinal, Node>& exporter, CombineMode CM) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::doImport");

        XPETRA_DYNAMIC_CAST(const EpetraIntMultiVectorT<GlobalOrdinal XPETRA_COMMA Node>, source, tSource, "Xpetra::EpetraIntMultiVectorT::doImport only accept Xpetra::EpetraIntMultiVectorT as input arguments.");
        XPETRA_DYNAMIC_CAST(const EpetraExportT<GlobalOrdinal XPETRA_COMMA Node>, exporter, tExporter, "Xpetra::EpetraIntMultiVectorT::doImport only accept Xpetra::EpetraImportT as input arguments.");

        const Epetra_IntMultiVector & v = *tSource.getEpetra_IntMultiVector();
        int err = vec_->Import(v, *tExporter.getEpetra_Export(), toEpetra(CM));
        TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");
      }

      void doExport(const DistObject<int, LocalOrdinal, GlobalOrdinal, Node> &dest,
                                     const Export<int, GlobalOrdinal, Node>& exporter, CombineMode CM) {
        XPETRA_MONITOR("EpetraIntMultiVectorT::doExport");

        XPETRA_DYNAMIC_CAST(const EpetraIntMultiVectorT<GlobalOrdinal XPETRA_COMMA Node>, dest, tDest, "Xpetra::EpetraIntMultiVectorT::doImport only accept Xpetra::EpetraIntMultiVectorT as input arguments.");
        XPETRA_DYNAMIC_CAST(const EpetraExportT<GlobalOrdinal XPETRA_COMMA Node>, exporter, tExporter, "Xpetra::EpetraIntMultiVectorT::doImport only accept Xpetra::EpetraImportT as input arguments.");

        const Epetra_IntMultiVector & v = *tDest.getEpetra_IntMultiVector();
        int err = vec_->Export(v, *tExporter.getEpetra_Export(), toEpetra(CM));
        TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");
      }

      void replaceMap(const RCP<const Map<int, GlobalOrdinal, Node> >& map) {
      XPETRA_MONITOR("EpetraIntMultiVectorT::replaceMap");
      int err = 0;
      if (!map.is_null()) {
        err = this->getEpetra_IntMultiVector()->ReplaceMap(toEpetra<GlobalOrdinal,Node>(map));

      } else {
        // Replace map with a dummy map to avoid potential hangs later
        Epetra_SerialComm SComm;
        Epetra_Map NewMap((GlobalOrdinal) vec_->MyLength(), (GlobalOrdinal) vec_->Map().IndexBase64(), SComm);
        err = this->getEpetra_IntMultiVector()->ReplaceMap(NewMap);
      }
      TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");
      }



  #ifdef HAVE_XPETRA_KOKKOS_REFACTOR
      typedef typename Xpetra::MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>::dual_view_type dual_view_type;

      typename dual_view_type::t_host_um getHostLocalView () const {
        typedef Kokkos::View< typename dual_view_type::t_host::data_type ,
                      Kokkos::LayoutLeft,
                      typename dual_view_type::t_host::device_type ,
                      Kokkos::MemoryUnmanaged> epetra_view_type;

        // access Epetra vector data
        int* data = NULL;
        int myLDA;
        vec_->ExtractView(&data, &myLDA);
        int localLength = vec_->MyLength();
        int numVectors  = vec_->NumVectors();

        // create view
        epetra_view_type test = epetra_view_type(data, localLength, numVectors);
        typename dual_view_type::t_host_um ret = subview(test, Kokkos::ALL(), Kokkos::ALL());

        return ret;
      }

      typename dual_view_type::t_dev_um getDeviceLocalView() const {
        throw std::runtime_error("Epetra does not support device views!");
#ifndef __NVCC__ //prevent nvcc warning
        typename dual_view_type::t_dev_um ret;
#endif
        TEUCHOS_UNREACHABLE_RETURN(ret);
      }

      template<class TargetDeviceType>
      typename Kokkos::Impl::if_c<
        std::is_same<
          typename dual_view_type::t_dev_um::execution_space::memory_space,
          typename TargetDeviceType::memory_space>::value,
          typename dual_view_type::t_dev_um,
          typename dual_view_type::t_host_um>::type
      getLocalView () const {
        return this->MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node >::template getLocalView<TargetDeviceType>();
      }
  #endif


    protected:
      virtual void
      assign (const MultiVector<Scalar, LocalOrdinal, GlobalOrdinal, Node>& rhs)
      {
        typedef EpetraIntMultiVectorT<GlobalOrdinal, Node> this_type;
        const this_type* rhsPtr = dynamic_cast<const this_type*> (&rhs);
        TEUCHOS_TEST_FOR_EXCEPTION(
          rhsPtr == NULL, std::invalid_argument, "Xpetra::MultiVector::operator=: "
          "The left-hand side (LHS) of the assignment has a different type than "
          "the right-hand side (RHS).  The LHS has type Xpetra::EpetraIntMultiVectorT "
          "(which means it wraps an Epetra_IntMultiVector), but the RHS has some "
          "other type.  This probably means that the RHS wraps either an "
          "Tpetra::MultiVector, or an Epetra_MultiVector.  Xpetra::MultiVector "
          "does not currently implement assignment from a Tpetra object to an "
          "Epetra object, though this could be added with sufficient interest.");

        RCP<const Epetra_IntMultiVector> rhsImpl = rhsPtr->getEpetra_IntMultiVector ();
        RCP<Epetra_IntMultiVector> lhsImpl = this->getEpetra_IntMultiVector ();

        TEUCHOS_TEST_FOR_EXCEPTION(
          rhsImpl.is_null (), std::logic_error, "Xpetra::MultiVector::operator= "
          "(in Xpetra::EpetraIntMultiVectorT::assign): *this (the right-hand side of "
          "the assignment) has a null RCP<Epetra_IntMultiVector> inside.  Please "
          "report this bug to the Xpetra developers.");
        TEUCHOS_TEST_FOR_EXCEPTION(
          lhsImpl.is_null (), std::logic_error, "Xpetra::MultiVector::operator= "
          "(in Xpetra::EpetraIntMultiVectorT::assign): The left-hand side of the "
          "assignment has a null RCP<Epetra_IntMultiVector> inside.  Please report "
          "this bug to the Xpetra developers.");

        // Epetra_IntMultiVector's assignment operator does a deep copy.
        *lhsImpl = *rhsImpl;
      }


    private:
      RCP< Epetra_IntMultiVector > vec_;
  };
#endif


} // namespace Xpetra

#endif // XPETRA_EPETRAINTMULTIVECTOR_HPP