Xpetra_EpetraIntVector.hpp

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#ifndef XPETRA_EPETRAINTVECTOR_HPP
#define XPETRA_EPETRAINTVECTOR_HPP

#include "Xpetra_EpetraConfigDefs.hpp"

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

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

namespace Xpetra {

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

template<class GlobalOrdinal, class Node>
const Epetra_IntVector & toEpetra(const Vector<int, int, GlobalOrdinal, Node> &);
//

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

  public:



    explicit EpetraIntVectorT(const Teuchos::RCP<const Map<LocalOrdinal, GlobalOrdinal, Node> > &map, bool zeroOut=true)  {  }

    ~EpetraIntVectorT() {  };




    int dot(const Vector<Scalar,LocalOrdinal,GlobalOrdinal,Node> &a) const { XPETRA_MONITOR("EpetraIntVectorT::dot"); TEUCHOS_TEST_FOR_EXCEPTION(-1, Xpetra::Exceptions::NotImplemented, "TODO"); TEUCHOS_UNREACHABLE_RETURN(-1); }


    Teuchos::ScalarTraits<int>::magnitudeType norm1() const { XPETRA_MONITOR("EpetraIntVectorT::norm1"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); TEUCHOS_UNREACHABLE_RETURN(-1); }


    Teuchos::ScalarTraits<int>::magnitudeType norm2() const { XPETRA_MONITOR("EpetraIntVectorT::norm2"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); TEUCHOS_UNREACHABLE_RETURN(-1); }

    Teuchos::ScalarTraits<int>::magnitudeType normInf() const { XPETRA_MONITOR("EpetraIntVectorT::normInf"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); TEUCHOS_UNREACHABLE_RETURN(-1); }

    int meanValue() const { XPETRA_MONITOR("EpetraIntVectorT::meanValue"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); TEUCHOS_UNREACHABLE_RETURN(-1); }

    int maxValue() const { XPETRA_MONITOR("EpetraIntVectorT::maxValue"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); TEUCHOS_UNREACHABLE_RETURN(-1); }





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

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

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

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

    void putScalar(const int &value) {  }

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



    void setSeed(unsigned int seed) { XPETRA_MONITOR("EpetraIntVectorT::setSeed"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "Xpetra::EpetraIntVectorT::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 { 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 { }

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

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

    void scale(const int &alpha) {  }

    void scale (Teuchos::ArrayView< const int > alpha) {
      XPETRA_MONITOR("EpetraIntVectorT::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("EpetraIntVectorT::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("EpetraIntVectorT::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("EpetraIntVectorT::norm1"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

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

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

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

    void maxValue(const Teuchos::ArrayView<int> &maxs) const { XPETRA_MONITOR("EpetraIntVectorT::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("EpetraIntVectorT::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("EpetraIntVectorT::elementWiseMultiply");
        TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "Xpetra_EpetraIntVector: elementWiseMultiply not implemented because Epetra_IntVector does not support this operation");
      }




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

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

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

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




    size_t getNumVectors() const { XPETRA_MONITOR("EpetraIntVectorT::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_IntVector > getEpetra_IntVector() 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<
      Kokkos::Impl::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_IntVector > vec_;

  }; // class EpetraIntVectorT

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

    public:



      explicit EpetraIntVectorT(const Teuchos::RCP<const Map<LocalOrdinal, GlobalOrdinal, Node> > &map, bool zeroOut=true)
      {
        vec_ = rcp(new Epetra_IntVector(toEpetra<GlobalOrdinal,Node>(map), zeroOut));
      }

      ~EpetraIntVectorT() {  };




      int dot(const Vector<Scalar,LocalOrdinal,GlobalOrdinal,Node> &/* a */) const { XPETRA_MONITOR("EpetraIntVectorT::dot"); TEUCHOS_TEST_FOR_EXCEPTION(-1, Xpetra::Exceptions::NotImplemented, "TODO"); TEUCHOS_UNREACHABLE_RETURN(-1); }


      Teuchos::ScalarTraits<int>::magnitudeType norm1() const { XPETRA_MONITOR("EpetraIntVectorT::norm1"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); TEUCHOS_UNREACHABLE_RETURN(-1); }


      Teuchos::ScalarTraits<int>::magnitudeType norm2() const { XPETRA_MONITOR("EpetraIntVectorT::norm2"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); TEUCHOS_UNREACHABLE_RETURN(-1); }

      Teuchos::ScalarTraits<int>::magnitudeType normInf() const { XPETRA_MONITOR("EpetraIntVectorT::normInf"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); TEUCHOS_UNREACHABLE_RETURN(-1); }

      int meanValue() const { XPETRA_MONITOR("EpetraIntVectorT::meanValue"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); TEUCHOS_UNREACHABLE_RETURN(-1); }

      int maxValue() const { XPETRA_MONITOR("EpetraIntVectorT::maxValue"); return vec_->MaxValue(); }





      void replaceGlobalValue(GlobalOrdinal /* globalRow */, const Scalar &/* value */) { XPETRA_MONITOR("EpetraIntVectorT::replaceGlobalValue"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

      void sumIntoGlobalValue(GlobalOrdinal /* globalRow */, const Scalar &/* value */) { XPETRA_MONITOR("EpetraIntVectorT::sumIntoGlobalValue"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

      void replaceLocalValue(LocalOrdinal myRow, const Scalar &value) { XPETRA_MONITOR("EpetraIntVectorT::replaceLocalValue");(*vec_)[myRow] = value; }

      void sumIntoLocalValue(LocalOrdinal myRow, const Scalar &value) { XPETRA_MONITOR("EpetraIntVectorT::sumIntoLocalValue"); (*vec_)[myRow] += value;}

      void putScalar(const int &value) {  vec_->PutValue(value); }

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



      void setSeed(unsigned int /* seed */) { XPETRA_MONITOR("EpetraIntVectorT::setSeed"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "Xpetra::EpetraIntVectorT::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("EpetraIntVectorT::getData");

        int * data = vec_->Values();
        int localLength = vec_->MyLength();

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

      Teuchos::ArrayRCP<int> getDataNonConst(size_t /* j */) {
        XPETRA_MONITOR("EpetraIntVectorT::getDataNonConst");

        int * data = vec_->Values();
        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("EpetraIntVectorT::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("EpetraIntVectorT::abs");

        //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 reciprocal(const MultiVector<int,int,GlobalOrdinal,Node> &/* A */) {
        XPETRA_MONITOR("EpetraIntVectorT::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::NotImplemented, "TODO");
      }

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

      void scale (Teuchos::ArrayView< const int > /* alpha */) {
        XPETRA_MONITOR("EpetraIntVectorT::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("EpetraIntVectorT::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("EpetraIntVectorT::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("EpetraIntVectorT::norm1"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

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

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

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

      void maxValue(const Teuchos::ArrayView<int> &/* maxs */) const { XPETRA_MONITOR("EpetraIntVectorT::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("EpetraIntVectorT::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("EpetraIntVectorT::elementWiseMultiply");
          TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "Xpetra_EpetraIntVector: elementWiseMultiply not implemented because Epetra_IntVector does not support this operation");
        }




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

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

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

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




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


      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("EpetraIntVectorT::isSameSize"); 
        const Vector<Scalar,LocalOrdinal,GlobalOrdinal,Node> *asvec = dynamic_cast<const Vector<Scalar,LocalOrdinal,GlobalOrdinal,Node> *>(&vec);
        if(!asvec) return false;
        auto vv = toEpetra(*asvec); 
        return ( (vec_->MyLength() == vv.MyLength()) && (getNumVectors() == vec.getNumVectors()));
      }




      std::string description() const {
        XPETRA_MONITOR("EpetraIntVectorT::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("EpetraIntVectorT::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_IntVector > getEpetra_IntVector() 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("EpetraIntVectorT::doImport");

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

         const Epetra_IntVector & v = *tSource.getEpetra_IntVector();
         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("EpetraIntVectorT::doExport");

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

        const Epetra_IntVector & v = *tDest.getEpetra_IntVector();
        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("EpetraIntVectorT::doImport");

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

        const Epetra_IntVector & v = *tSource.getEpetra_IntVector();
        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("EpetraIntVectorT::doExport");

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

        const Epetra_IntVector & v = *tDest.getEpetra_IntVector();
        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 */) {
        // 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 {
        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;
        vec_->ExtractView(&data);
        int localLength = vec_->MyLength();

        // create view
        epetra_view_type test = epetra_view_type(data, localLength,1);
        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<
        Kokkos::Impl::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 EpetraIntVectorT<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::EpetraIntVectorT "
          "(which means it wraps an Epetra_IntVector), 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_IntVector> rhsImpl = rhsPtr->getEpetra_IntVector ();
        RCP<Epetra_IntVector> lhsImpl = this->getEpetra_IntVector ();

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

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


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

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

    public:



      explicit EpetraIntVectorT(const Teuchos::RCP<const Map<LocalOrdinal, GlobalOrdinal, Node> > &map, bool zeroOut=true)
      {
        vec_ = rcp(new Epetra_IntVector(toEpetra<GlobalOrdinal,Node>(map), zeroOut));
      }

      ~EpetraIntVectorT() {  };




      int dot(const Vector<Scalar,LocalOrdinal,GlobalOrdinal,Node> &/* a */) const { XPETRA_MONITOR("EpetraIntVectorT::dot"); TEUCHOS_TEST_FOR_EXCEPTION(true, Xpetra::Exceptions::NotImplemented, "TODO"); /* return -1; */ }


      Teuchos::ScalarTraits<int>::magnitudeType norm1() const { XPETRA_MONITOR("EpetraIntVectorT::norm1"); TEUCHOS_TEST_FOR_EXCEPTION(true, Xpetra::Exceptions::NotImplemented, "TODO"); /* return -1; */ }


      Teuchos::ScalarTraits<int>::magnitudeType norm2() const { XPETRA_MONITOR("EpetraIntVectorT::norm2"); TEUCHOS_TEST_FOR_EXCEPTION(true, Xpetra::Exceptions::NotImplemented, "TODO"); /* return -1; */ }

      Teuchos::ScalarTraits<int>::magnitudeType normInf() const { XPETRA_MONITOR("EpetraIntVectorT::normInf"); TEUCHOS_TEST_FOR_EXCEPTION(true, Xpetra::Exceptions::NotImplemented, "TODO"); /* return -1; */ }

      int meanValue() const { XPETRA_MONITOR("EpetraIntVectorT::meanValue"); TEUCHOS_TEST_FOR_EXCEPTION(true, Xpetra::Exceptions::NotImplemented, "TODO"); /* return -1; */ }

      int maxValue() const { XPETRA_MONITOR("EpetraIntVectorT::maxValue"); return Teuchos::as<int>(vec_->MaxValue()); }




      void replaceGlobalValue(GlobalOrdinal /* globalRow */, const Scalar &/* value */) { XPETRA_MONITOR("EpetraIntVectorT::replaceGlobalValue"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

      void sumIntoGlobalValue(GlobalOrdinal /* globalRow */, const Scalar &/* value */) { XPETRA_MONITOR("EpetraIntVectorT::sumIntoGlobalValue"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

      void replaceLocalValue(LocalOrdinal myRow, const Scalar &value) { XPETRA_MONITOR("EpetraIntVectorT::replaceLocalValue");(*vec_)[myRow] = value;}

      void sumIntoLocalValue(LocalOrdinal myRow, const Scalar &value) { XPETRA_MONITOR("EpetraIntVectorT::sumIntoLocalValue"); (*vec_)[myRow] += value;}

      void putScalar(const int &value) {  vec_->PutValue(value); }

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



      void setSeed(unsigned int /* seed */) { XPETRA_MONITOR("EpetraIntVectorT::setSeed"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "Xpetra::EpetraIntVectorT::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("EpetraIntVectorT::getData");

        int * data = vec_->Values();
        int localLength = vec_->MyLength();

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

      Teuchos::ArrayRCP<int> getDataNonConst(size_t /* j */) {
        XPETRA_MONITOR("EpetraIntVectorT::getDataNonConst");

        int * data = vec_->Values();
        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("EpetraIntVectorT::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("EpetraIntVectorT::abs");

        //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 reciprocal(const MultiVector<int,int,GlobalOrdinal,Node> &/* A */) {
        XPETRA_MONITOR("EpetraIntVectorT::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::NotImplemented, "TODO");
      }

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

      void scale (Teuchos::ArrayView< const int > /* alpha */) {
        XPETRA_MONITOR("EpetraIntVectorT::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("EpetraIntVectorT::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("EpetraIntVectorT::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("EpetraIntVectorT::norm1"); TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "TODO"); }

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

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

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

      void maxValue(const Teuchos::ArrayView<int> &/* maxs */) const { XPETRA_MONITOR("EpetraIntVectorT::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("EpetraIntVectorT::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("EpetraIntVectorT::elementWiseMultiply");
          TEUCHOS_TEST_FOR_EXCEPTION(1, Xpetra::Exceptions::NotImplemented, "Xpetra_EpetraIntVector: elementWiseMultiply not implemented because Epetra_IntVector does not support this operation");
        }




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

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

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

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




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


      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("EpetraIntVectorT::isSameSize"); 
        const Vector<Scalar,LocalOrdinal,GlobalOrdinal,Node>  *asvec = dynamic_cast<const Vector<Scalar,LocalOrdinal,GlobalOrdinal,Node>* >(&vec);
        if(!asvec) return false;
        auto vv = toEpetra(*asvec); 
        return ( (vec_->MyLength() == vv.MyLength()) && (getNumVectors() == vec.getNumVectors()));
      }



      std::string description() const {
        XPETRA_MONITOR("EpetraIntVectorT::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("EpetraIntVectorT::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_IntVector > getEpetra_IntVector() 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("EpetraIntVectorT::doImport");

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

         const Epetra_IntVector & v = *tSource.getEpetra_IntVector();
         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("EpetraIntVectorT::doExport");

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

        const Epetra_IntVector & v = *tDest.getEpetra_IntVector();
        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("EpetraIntVectorT::doImport");

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

        const Epetra_IntVector & v = *tSource.getEpetra_IntVector();
        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("EpetraIntVectorT::doExport");

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

        const Epetra_IntVector & v = *tDest.getEpetra_IntVector();
        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 */) {
        // 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 {
        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;
        vec_->ExtractView(&data);
        int localLength = vec_->MyLength();

        // create view
        epetra_view_type test = epetra_view_type(data, localLength, 1);
        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<
        Kokkos::Impl::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 EpetraIntVectorT<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::EpetraIntVectorT "
          "(which means it wraps an Epetra_IntVector), 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_IntVector> rhsImpl = rhsPtr->getEpetra_IntVector ();
        RCP<Epetra_IntVector> lhsImpl = this->getEpetra_IntVector ();

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

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


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


} // namespace Xpetra

#endif // XPETRA_EPETRAINTVECTOR_HPP