libtrilinos-xpetra-dev 12.10.1-3 / usr / include / trilinos / Xpetra_EpetraCrsGraph.hpp

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#ifndef XPETRA_EPETRACRSGRAPH_HPP
#define XPETRA_EPETRACRSGRAPH_HPP

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

#include "Xpetra_EpetraConfigDefs.hpp"

#include "Xpetra_CrsGraph.hpp"

#include "Xpetra_EpetraExport.hpp"
#include "Xpetra_EpetraImport.hpp"
#include "Xpetra_EpetraMap.hpp"
#include "Xpetra_EpetraUtils.hpp"

#include <Epetra_CrsGraph.h>

namespace Xpetra {

// TODO: move that elsewhere
template<class GlobalOrdinal, class Node>
RCP< const CrsGraph<int, GlobalOrdinal, Node> >
toXpetra (const Epetra_CrsGraph& graph);

template<class GlobalOrdinal, class Node>
const Epetra_CrsGraph&
toEpetra (const RCP<const CrsGraph<int, GlobalOrdinal, Node> > &graph);

template<class GlobalOrdinal, class Node>
class EpetraCrsGraphT
    : public CrsGraph<int, GlobalOrdinal, Node>
{
  typedef int LocalOrdinal;

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

public:

  //! @name Constructor/Destructor Methods
  //@{
  //! Constructor specifying fixed number of entries for each row.
  EpetraCrsGraphT(const RCP< const map_type > &rowMap, size_t maxNumEntriesPerRow, ProfileType pftype=DynamicProfile, const RCP< Teuchos::ParameterList > &plist=Teuchos::null) {
    TEUCHOS_TEST_FOR_EXCEPTION(true, Xpetra::Exceptions::RuntimeError,
      "Xpetra::EpetraCrsGraph only available for GO=int or GO=long long with EpetraNode (Serial or OpenMP depending on configuration)");
  }

  //! Constructor specifying column Map and fixed number of entries for each row.
  EpetraCrsGraphT(const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &rowMap, const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &colMap, size_t maxNumEntriesPerRow, ProfileType pftype=DynamicProfile, const Teuchos::RCP< Teuchos::ParameterList > &plist=null) {
    TEUCHOS_TEST_FOR_EXCEPTION(true, Xpetra::Exceptions::RuntimeError,
      "Xpetra::EpetraCrsGraph only available for GO=int or GO=long long with EpetraNode (Serial or OpenMP depending on configuration)");
  }

  ////! Constructor specifying column Map and number of entries in each row.
  // Definition not in cpp, so comment out
  //EpetraCrsGraphT(const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &rowMap, const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &colMap, const ArrayRCP< const size_t > &NumEntriesPerRowToAlloc, ProfileType pftype=DynamicProfile, const RCP< ParameterList > &params=null);

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

  //@}

  //! @name Insertion/Removal Methods
  //@{

  //! Insert global indices into the graph.
  void insertGlobalIndices(GlobalOrdinal globalRow, const ArrayView<const GlobalOrdinal> &indices) {  }

  //! Insert local indices into the graph.
  void insertLocalIndices(const LocalOrdinal localRow, const ArrayView< const LocalOrdinal> &indices) {  }

  //! Remove all graph indices from the specified local row.
  void removeLocalIndices(LocalOrdinal localRow) {  }

  //@}

  //! @name Transformational Methods
  //@{

  //! Signal that data entry is complete, specifying domain and range maps.
  void fillComplete(const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &domainMap, const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &rangeMap, const RCP< ParameterList > &params=null){  }

  //! Signal that data entry is complete.
  void fillComplete(const RCP< ParameterList > &params=null) {  }
  //@}

  //! @name Methods implementing RowGraph.
  //@{

  //! Returns the communicator.
  RCP< const Comm< int > >  getComm() const {
    return Teuchos::null;
  }

  //! Returns the Map that describes the row distribution in this graph.
  RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > >  getRowMap() const { return Teuchos::null; }

  //! Returns the Map that describes the column distribution in this graph.
  RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > >  getColMap() const { return Teuchos::null; }

  //! Returns the Map associated with the domain of this graph.
  RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > >  getDomainMap() const { return Teuchos::null; }

  //! Returns the Map associated with the domain of this graph.
  RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > >  getRangeMap() const { return Teuchos::null; }

  //! Returns the importer associated with this graph.
  RCP< const Import< LocalOrdinal, GlobalOrdinal, Node > > getImporter() const { return Teuchos::null; }

  //! Returns the exporter associated with this graph.
  RCP< const Export< LocalOrdinal, GlobalOrdinal, Node > > getExporter() const { return Teuchos::null; }

  //! Returns the number of global rows in the graph.
  global_size_t getGlobalNumRows() const { return 0; }

  //! Returns the number of global columns in the graph.
  global_size_t getGlobalNumCols() const { return 0; }

  //! Returns the number of graph rows owned on the calling node.
  size_t getNodeNumRows() const { return 0; }

  //! Returns the number of columns connected to the locally owned rows of this graph.
  size_t getNodeNumCols() const { return 0; }

  //! Returns the index base for global indices for this graph.
  GlobalOrdinal getIndexBase() const { return 0; }

  //! Returns the global number of entries in the graph.
  global_size_t getGlobalNumEntries() const { return 0; }

  //! Returns the local number of entries in the graph.
  size_t getNodeNumEntries() const { return 0; }

  //! Returns the current number of entries on this node in the specified global row.
  size_t getNumEntriesInGlobalRow(GlobalOrdinal globalRow) const { return 0; }

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

  //! Returns the current number of allocated entries for this node in the specified global row .
  size_t getNumAllocatedEntriesInGlobalRow(GlobalOrdinal globalRow) const { return 0; }

  //! Returns the current number of allocated entries on this node in the specified local row.
  size_t getNumAllocatedEntriesInLocalRow(LocalOrdinal localRow) const { return 0; }

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

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

  //! Maximum number of entries in all rows over all processes.
  size_t getGlobalMaxNumRowEntries() const { return 0; }

  //! Maximum number of entries in all rows owned by the calling process.
  size_t getNodeMaxNumRowEntries() const { return 0; }

  //! Whether the graph has a column Map.
  bool hasColMap() const { return false; }

  //! Whether the graph is locally lower triangular.
  bool isLowerTriangular() const { return false; }

  //! Whether the graph is locally upper triangular.
  bool isUpperTriangular() const { return false; }

  //! Whether column indices are stored using local indices on the calling process.
  bool isLocallyIndexed() const { return false; }

  //! Whether column indices are stored using global indices on the calling process.
  bool isGloballyIndexed() const { return false; }

  //! Whether fillComplete() has been called and the graph is in compute mode.
  bool isFillComplete() const { return false; }

  //! Returns true if storage has been optimized.
  bool isStorageOptimized() const { return false; }

  //! Return a const, nonpersisting view of global indices in the given row.
  void getGlobalRowView(GlobalOrdinal GlobalRow, ArrayView<const GlobalOrdinal> &Indices) const {  }

  //! Return a const, nonpersisting view of local indices in the given row.
  void getLocalRowView(LocalOrdinal LocalRow, ArrayView<const LocalOrdinal> &indices) const {  }
  //@}

  //! @name Overridden from Teuchos::Describable
  //@{

  //! Return a simple one-line description of this object.
  std::string description() const { return std::string(""); }

  //! Print the object with some verbosity level to an FancyOStream object.
  void describe(Teuchos::FancyOStream &out, const Teuchos::EVerbosityLevel verbLevel=Teuchos::Describable::verbLevel_default) const {  }

  //@}

  //! Implements DistObject interface
  //{@

  //! Access function for the Tpetra::Map this DistObject was constructed with.
  Teuchos::RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > getMap() const { return Teuchos::null; }

  //! Import.
  void doImport(const DistObject<GlobalOrdinal, LocalOrdinal, GlobalOrdinal, Node> &source,
      const Import<LocalOrdinal, GlobalOrdinal, Node> &importer, CombineMode CM) {  }

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

  //! Import (using an Exporter).
  void doImport(const DistObject<GlobalOrdinal, LocalOrdinal, GlobalOrdinal, Node> &source,
      const Export<LocalOrdinal, GlobalOrdinal, Node>& exporter, CombineMode CM) {  }

  //! Export (using an Importer).
  void doExport(const DistObject<GlobalOrdinal, LocalOrdinal, GlobalOrdinal, Node> &dest,
      const Export<LocalOrdinal, GlobalOrdinal, Node>& exporter, CombineMode CM) {  }
  //@}

  //! @name Xpetra specific
  //@{

  //! EpetraCrsGraphT constructor to wrap a Epetra_CrsGraph object
  EpetraCrsGraphT(const Teuchos::RCP<Epetra_CrsGraph> &graph) {
    TEUCHOS_TEST_FOR_EXCEPTION(true, Xpetra::Exceptions::RuntimeError,
      "Xpetra::EpetraCrsGraph only available for GO=int or GO=long long with EpetraNode (Serial or OpenMP depending on configuration)");
  }

  //! Get the underlying Epetra graph
  RCP< const Epetra_CrsGraph> getEpetra_CrsGraph() const { return Teuchos::null; }

  //@}

private:

}; // EpetraCrsGraphT class

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

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

public:

  //! @name Constructor/Destructor Methods
  //@{
  //! Constructor specifying fixed number of entries for each row.
  EpetraCrsGraphT(const RCP< const map_type > &rowMap, size_t maxNumEntriesPerRow, ProfileType pftype=DynamicProfile, const RCP< Teuchos::ParameterList > &plist=Teuchos::null)
: graph_(Teuchos::rcp(new Epetra_CrsGraph(Copy, toEpetra<GlobalOrdinal,Node>(rowMap), maxNumEntriesPerRow, toEpetra(pftype)))) { }


  ////! Constructor specifying (possibly different) number of entries in each row.
  // Definition not in cpp, so comment out
  //EpetraCrsGraphT(const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &rowMap, const ArrayRCP< const size_t > &NumEntriesPerRowToAlloc, ProfileType pftype=DynamicProfile, const RCP< ParameterList > &params=null);

  //! Constructor specifying column Map and fixed number of entries for each row.
  EpetraCrsGraphT(const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &rowMap, const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &colMap, size_t maxNumEntriesPerRow, ProfileType pftype=DynamicProfile, const Teuchos::RCP< Teuchos::ParameterList > &plist=null)
  : graph_(Teuchos::rcp(new Epetra_CrsGraph(Copy, toEpetra<GlobalOrdinal,Node>(rowMap), toEpetra<GlobalOrdinal,Node>(colMap), maxNumEntriesPerRow, toEpetra(pftype)))) { }

  ////! Constructor specifying column Map and number of entries in each row.
  // Definition not in cpp, so comment out
  //EpetraCrsGraphT(const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &rowMap, const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &colMap, const ArrayRCP< const size_t > &NumEntriesPerRowToAlloc, ProfileType pftype=DynamicProfile, const RCP< ParameterList > &params=null);

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

  //@}

  //! @name Insertion/Removal Methods
  //@{

  //! Insert global indices into the graph.
  void insertGlobalIndices(GlobalOrdinal globalRow, const ArrayView<const GlobalOrdinal> &indices) {
    XPETRA_MONITOR("EpetraCrsGraphT::insertGlobalIndices");

    GlobalOrdinal* indices_rawPtr = const_cast<GlobalOrdinal*>(indices.getRawPtr()); // there is no const in the Epetra interface :(
    XPETRA_ERR_CHECK(graph_->InsertGlobalIndices(globalRow, indices.size(), indices_rawPtr));
  }

  //! Insert local indices into the graph.
  void insertLocalIndices(const LocalOrdinal localRow, const ArrayView< const LocalOrdinal> &indices) {
    XPETRA_MONITOR("EpetraCrsGraphT::insertLocalIndices");

    int* indices_rawPtr = const_cast<int*>(indices.getRawPtr()); // there is no const in the Epetra interface :(
    XPETRA_ERR_CHECK(graph_->InsertMyIndices(localRow, indices.size(), indices_rawPtr));
  }

  //! Remove all graph indices from the specified local row.
  void removeLocalIndices(LocalOrdinal localRow) { XPETRA_MONITOR("EpetraCrsGraphT::removeLocalIndices"); graph_->RemoveMyIndices(localRow); }

  //@}

  //! @name Transformational Methods
  //@{

  //! Signal that data entry is complete, specifying domain and range maps.
  void fillComplete(const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &domainMap, const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &rangeMap, const RCP< ParameterList > &params=null){
    XPETRA_MONITOR("EpetraCrsGraphT::fillComplete");

    graph_->FillComplete(toEpetra<GlobalOrdinal,Node>(domainMap), toEpetra<GlobalOrdinal,Node>(rangeMap));
    bool doOptimizeStorage = true;
    if (params != null && params->get("Optimize Storage",true) == false) doOptimizeStorage = false;
    if (doOptimizeStorage) graph_->OptimizeStorage();
  }

  //! Signal that data entry is complete.
  void fillComplete(const RCP< ParameterList > &params=null) {
    XPETRA_MONITOR("EpetraCrsGraphT::fillComplete");

    graph_->FillComplete();
    bool doOptimizeStorage = true;
    if (params != null && params->get("Optimize Storage",true) == false) doOptimizeStorage = false;
    if (doOptimizeStorage) graph_->OptimizeStorage();
  }
  //@}

  //! @name Methods implementing RowGraph.
  //@{

  //! Returns the communicator.
  RCP< const Comm< int > >  getComm() const {
    XPETRA_MONITOR("EpetraCrsGraphT::getComm");
    return toXpetra (graph_->Comm ());
  }

  //! Returns the Map that describes the row distribution in this graph.
  RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > >  getRowMap() const { XPETRA_MONITOR("EpetraCrsGraphT::getRowMap"); return toXpetra<GlobalOrdinal,Node>(graph_->RowMap()); }

  //! Returns the Map that describes the column distribution in this graph.
  RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > >  getColMap() const { XPETRA_MONITOR("EpetraCrsGraphT::getColMap"); return toXpetra<GlobalOrdinal,Node>(graph_->ColMap()); }

  //! Returns the Map associated with the domain of this graph.
  RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > >  getDomainMap() const { XPETRA_MONITOR("EpetraCrsGraphT::getDomainMap"); return toXpetra<GlobalOrdinal,Node>(graph_->DomainMap()); }

  //! Returns the Map associated with the domain of this graph.
  RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > >  getRangeMap() const { XPETRA_MONITOR("EpetraCrsGraphT::getRangeMap"); return toXpetra<GlobalOrdinal,Node>(graph_->RangeMap()); }

  //! Returns the importer associated with this graph.
  RCP< const Import< LocalOrdinal, GlobalOrdinal, Node > > getImporter() const { XPETRA_MONITOR("EpetraCrsGraphT::getImporter"); return toXpetra<GlobalOrdinal,Node>(graph_->Importer()); }

  //! Returns the exporter associated with this graph.
  RCP< const Export< LocalOrdinal, GlobalOrdinal, Node > > getExporter() const { XPETRA_MONITOR("EpetraCrsGraphT::getExporter"); return toXpetra<GlobalOrdinal,Node>(graph_->Exporter()); }

  //! Returns the number of global rows in the graph.
  global_size_t getGlobalNumRows() const { XPETRA_MONITOR("EpetraCrsGraphT::getGlobalNumRows"); return graph_->NumGlobalRows64(); }

  //! Returns the number of global columns in the graph.
  global_size_t getGlobalNumCols() const { XPETRA_MONITOR("EpetraCrsGraphT::getGlobalNumCols"); return graph_->NumGlobalCols64(); }

  //! Returns the number of graph rows owned on the calling node.
  size_t getNodeNumRows() const { XPETRA_MONITOR("EpetraCrsGraphT::getNodeNumRows"); return graph_->NumMyRows(); }

  //! Returns the number of columns connected to the locally owned rows of this graph.
  size_t getNodeNumCols() const { XPETRA_MONITOR("EpetraCrsGraphT::getNodeNumCols"); return graph_->NumMyCols(); }

  //! Returns the index base for global indices for this graph.
  GlobalOrdinal getIndexBase() const { XPETRA_MONITOR("EpetraCrsGraphT::getIndexBase"); return (GlobalOrdinal) graph_->IndexBase64(); }

  //! Returns the global number of entries in the graph.
  global_size_t getGlobalNumEntries() const { XPETRA_MONITOR("EpetraCrsGraphT::getGlobalNumEntries"); return graph_->NumGlobalEntries64(); }

  //! Returns the local number of entries in the graph.
  size_t getNodeNumEntries() const { XPETRA_MONITOR("EpetraCrsGraphT::getNodeNumEntries"); return graph_->NumMyEntries(); }

  //! Returns the current number of entries on this node in the specified global row.
  size_t getNumEntriesInGlobalRow(GlobalOrdinal globalRow) const { XPETRA_MONITOR("EpetraCrsGraphT::getNumEntriesInGlobalRow"); return graph_->NumGlobalIndices(globalRow); }

  //! Returns the current number of entries on this node in the specified local row.
  size_t getNumEntriesInLocalRow(LocalOrdinal localRow) const { XPETRA_MONITOR("EpetraCrsGraphT::getNumEntriesInLocalRow"); return graph_->NumMyIndices(localRow); }

  //! Returns the current number of allocated entries for this node in the specified global row .
  size_t getNumAllocatedEntriesInGlobalRow(GlobalOrdinal globalRow) const { XPETRA_MONITOR("EpetraCrsGraphT::getNumAllocatedEntriesInGlobalRow"); return graph_->NumAllocatedGlobalIndices(globalRow); }

  //! Returns the current number of allocated entries on this node in the specified local row.
  size_t getNumAllocatedEntriesInLocalRow(LocalOrdinal localRow) const { XPETRA_MONITOR("EpetraCrsGraphT::getNumAllocatedEntriesInLocalRow"); return graph_->NumAllocatedMyIndices(localRow); }

  //! Returns the number of global diagonal entries, based on global row/column index comparisons.
  global_size_t getGlobalNumDiags() const { XPETRA_MONITOR("EpetraCrsGraphT::getGlobalNumDiags"); return graph_->NumGlobalDiagonals64(); }

  //! Returns the number of local diagonal entries, based on global row/column index comparisons.
  size_t getNodeNumDiags() const { XPETRA_MONITOR("EpetraCrsGraphT::getNodeNumDiags"); return graph_->NumMyDiagonals(); }

  //! Maximum number of entries in all rows over all processes.
  size_t getGlobalMaxNumRowEntries() const { XPETRA_MONITOR("EpetraCrsGraphT::getGlobalMaxNumRowEntries"); return graph_->GlobalMaxNumIndices(); }

  //! Maximum number of entries in all rows owned by the calling process.
  size_t getNodeMaxNumRowEntries() const { XPETRA_MONITOR("EpetraCrsGraphT::getNodeMaxNumRowEntries"); return graph_->MaxNumIndices(); }

  //! Whether the graph has a column Map.
  bool hasColMap() const { XPETRA_MONITOR("EpetraCrsGraphT::hasColMap"); return graph_->HaveColMap(); }

  //! Whether the graph is locally lower triangular.
  bool isLowerTriangular() const { XPETRA_MONITOR("EpetraCrsGraphT::isLowerTriangular"); return graph_->LowerTriangular(); }

  //! Whether the graph is locally upper triangular.
  bool isUpperTriangular() const { XPETRA_MONITOR("EpetraCrsGraphT::isUpperTriangular"); return graph_->UpperTriangular(); }

  //! Whether column indices are stored using local indices on the calling process.
  bool isLocallyIndexed() const { XPETRA_MONITOR("EpetraCrsGraphT::isLocallyIndexed"); return graph_->IndicesAreLocal(); }

  //! Whether column indices are stored using global indices on the calling process.
  bool isGloballyIndexed() const { XPETRA_MONITOR("EpetraCrsGraphT::isGloballyIndexed"); return graph_->IndicesAreGlobal(); }

  //! Whether fillComplete() has been called and the graph is in compute mode.
  bool isFillComplete() const { XPETRA_MONITOR("EpetraCrsGraphT::isFillComplete"); return graph_->Filled(); }

  //! Returns true if storage has been optimized.
  bool isStorageOptimized() const { XPETRA_MONITOR("EpetraCrsGraphT::isStorageOptimized"); return graph_->StorageOptimized(); }

  //! Return a const, nonpersisting view of global indices in the given row.
  void getGlobalRowView(GlobalOrdinal GlobalRow, ArrayView<const GlobalOrdinal> &Indices) const {
    XPETRA_MONITOR("EpetraCrsGraphT::getGlobalRowView");

    int      numEntries;
    GlobalOrdinal    * eIndices;

    XPETRA_ERR_CHECK(graph_->ExtractGlobalRowView(GlobalRow, numEntries, eIndices));
    if (numEntries == 0) { eIndices = NULL; } // Cf. TEUCHOS_TEST_FOR_EXCEPT( p == 0 && size_in != 0 ) in Teuchos ArrayView constructor.

    Indices = ArrayView<const GlobalOrdinal>(eIndices, numEntries);
  }

  //! Return a const, nonpersisting view of local indices in the given row.
  void getLocalRowView(LocalOrdinal LocalRow, ArrayView<const LocalOrdinal> &indices) const {
    XPETRA_MONITOR("EpetraCrsGraphT::getLocalRowView");

    int      numEntries;
    int    * eIndices;

    XPETRA_ERR_CHECK(graph_->ExtractMyRowView(LocalRow, numEntries, eIndices));
    if (numEntries == 0) { eIndices = NULL; } // Cf. TEUCHOS_TEST_FOR_EXCEPT( p == 0 && size_in != 0 ) in Teuchos ArrayView constructor.

    indices = ArrayView<const int>(eIndices, numEntries);
  }
  //@}

  //! @name Overridden from Teuchos::Describable
  //@{

  //! Return a simple one-line description of this object.
  std::string description() const { XPETRA_MONITOR("EpetraCrsGraphT::description"); return "NotImplemented"; }

  //! Print the object with some verbosity level to an FancyOStream object.
  void describe(Teuchos::FancyOStream &out, const Teuchos::EVerbosityLevel verbLevel=Teuchos::Describable::verbLevel_default) const {
    XPETRA_MONITOR("EpetraCrsGraphT::describe");

    out << "EpetraCrsGraphT::describe : Warning, verbosity level is ignored by this method." << std::endl;
    const Epetra_BlockMap rowmap = graph_->RowMap();
    if (rowmap.Comm().MyPID() == 0) out << "** EpetraCrsGraphT **\n\nrowmap" << std::endl;
    rowmap.Print(out);
    graph_->Print(out);
  }

  //@}

  //! Implements DistObject interface
  //{@

  //! Access function for the Tpetra::Map this DistObject was constructed with.
  Teuchos::RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > getMap() const { XPETRA_MONITOR("EpetraCrsGraphT::getMap"); return toXpetra<GlobalOrdinal,Node>(graph_->Map()); }

  //! Import.
  void doImport(const DistObject<GlobalOrdinal, LocalOrdinal, GlobalOrdinal, Node> &source,
      const Import<LocalOrdinal, GlobalOrdinal, Node> &importer, CombineMode CM) {
    XPETRA_MONITOR("EpetraCrsGraphT::doImport");

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

    RCP<const Epetra_CrsGraph> v = tSource.getEpetra_CrsGraph();
    int err = graph_->Import(*v, *tImporter.getEpetra_Import(), toEpetra(CM));
    TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");
  }

  //! Export.
  void doExport(const DistObject<GlobalOrdinal, LocalOrdinal, GlobalOrdinal, Node> &dest,
      const Import<LocalOrdinal, GlobalOrdinal, Node>& importer, CombineMode CM) {
    XPETRA_MONITOR("EpetraCrsGraphT::doExport");

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

    RCP<const Epetra_CrsGraph> v = tDest.getEpetra_CrsGraph();
    int err = graph_->Export(*v, *tImporter.getEpetra_Import(), toEpetra(CM));
    TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");
  }

  //! Import (using an Exporter).
  void doImport(const DistObject<GlobalOrdinal, LocalOrdinal, GlobalOrdinal, Node> &source,
      const Export<LocalOrdinal, GlobalOrdinal, Node>& exporter, CombineMode CM) {
    XPETRA_MONITOR("EpetraCrsGraphT::doImport");

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

    RCP<const Epetra_CrsGraph> v = tSource.getEpetra_CrsGraph();
    int err = graph_->Import(*v, *tExporter.getEpetra_Export(), toEpetra(CM));
    TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");

  }

  //! Export (using an Importer).
  void doExport(const DistObject<GlobalOrdinal, LocalOrdinal, GlobalOrdinal, Node> &dest,
      const Export<LocalOrdinal, GlobalOrdinal, Node>& exporter, CombineMode CM) {
    XPETRA_MONITOR("EpetraCrsGraphT::doExport");

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

    RCP<const Epetra_CrsGraph> v = tDest.getEpetra_CrsGraph();
    int err = graph_->Export(*v, *tExporter.getEpetra_Export(), toEpetra(CM));
    TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");
  }
  //@}

  //! @name Xpetra specific
  //@{

  //! EpetraCrsGraphT constructor to wrap a Epetra_CrsGraph object
  EpetraCrsGraphT(const Teuchos::RCP<Epetra_CrsGraph> &graph) : graph_(graph) {
    TEUCHOS_TEST_FOR_EXCEPTION(!graph->RowMap().GlobalIndicesIsType<GlobalOrdinal>(), std::runtime_error, "Xpetra::EpetraCrsGraphT: GlobalOrdinal mismatch.");
  }

  //! Get the underlying Epetra graph
  RCP< const Epetra_CrsGraph> getEpetra_CrsGraph() const { return graph_; }

  //@}

private:

  RCP<Epetra_CrsGraph> graph_;


};

#endif // specialization on Node=EpetraNode and GO=int

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

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

public:

  //! @name Constructor/Destructor Methods
  //@{
  //! Constructor specifying fixed number of entries for each row.
  EpetraCrsGraphT(const RCP< const map_type > &rowMap, size_t maxNumEntriesPerRow, ProfileType pftype=DynamicProfile, const RCP< Teuchos::ParameterList > &plist=Teuchos::null)
: graph_(Teuchos::rcp(new Epetra_CrsGraph(Copy, toEpetra<GlobalOrdinal,Node>(rowMap), maxNumEntriesPerRow, toEpetra(pftype)))) { }


  ////! Constructor specifying (possibly different) number of entries in each row.
  // Definition not in cpp, so comment out
  //EpetraCrsGraphT(const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &rowMap, const ArrayRCP< const size_t > &NumEntriesPerRowToAlloc, ProfileType pftype=DynamicProfile, const RCP< ParameterList > &params=null);

  //! Constructor specifying column Map and fixed number of entries for each row.
  EpetraCrsGraphT(const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &rowMap, const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &colMap, size_t maxNumEntriesPerRow, ProfileType pftype=DynamicProfile, const Teuchos::RCP< Teuchos::ParameterList > &plist=null)
  : graph_(Teuchos::rcp(new Epetra_CrsGraph(Copy, toEpetra<GlobalOrdinal,Node>(rowMap), toEpetra<GlobalOrdinal,Node>(colMap), maxNumEntriesPerRow, toEpetra(pftype)))) { }

  ////! Constructor specifying column Map and number of entries in each row.
  // Definition not in cpp, so comment out
  //EpetraCrsGraphT(const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &rowMap, const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &colMap, const ArrayRCP< const size_t > &NumEntriesPerRowToAlloc, ProfileType pftype=DynamicProfile, const RCP< ParameterList > &params=null);

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

  //@}

  //! @name Insertion/Removal Methods
  //@{

  //! Insert global indices into the graph.
  void insertGlobalIndices(GlobalOrdinal globalRow, const ArrayView<const GlobalOrdinal> &indices) {
    XPETRA_MONITOR("EpetraCrsGraphT::insertGlobalIndices");

    GlobalOrdinal* indices_rawPtr = const_cast<GlobalOrdinal*>(indices.getRawPtr()); // there is no const in the Epetra interface :(
    XPETRA_ERR_CHECK(graph_->InsertGlobalIndices(globalRow, indices.size(), indices_rawPtr));
  }

  //! Insert local indices into the graph.
  void insertLocalIndices(const LocalOrdinal localRow, const ArrayView< const LocalOrdinal> &indices) {
    XPETRA_MONITOR("EpetraCrsGraphT::insertLocalIndices");

    int* indices_rawPtr = const_cast<int*>(indices.getRawPtr()); // there is no const in the Epetra interface :(
    XPETRA_ERR_CHECK(graph_->InsertMyIndices(localRow, indices.size(), indices_rawPtr));
  }

  //! Remove all graph indices from the specified local row.
  void removeLocalIndices(LocalOrdinal localRow) { XPETRA_MONITOR("EpetraCrsGraphT::removeLocalIndices"); graph_->RemoveMyIndices(localRow); }

  //@}

  //! @name Transformational Methods
  //@{

  //! Signal that data entry is complete, specifying domain and range maps.
  void fillComplete(const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &domainMap, const RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > &rangeMap, const RCP< ParameterList > &params=null){
    XPETRA_MONITOR("EpetraCrsGraphT::fillComplete");

    graph_->FillComplete(toEpetra<GlobalOrdinal,Node>(domainMap), toEpetra<GlobalOrdinal,Node>(rangeMap));
    bool doOptimizeStorage = true;
    if (params != null && params->get("Optimize Storage",true) == false) doOptimizeStorage = false;
    if (doOptimizeStorage) graph_->OptimizeStorage();
  }

  //! Signal that data entry is complete.
  void fillComplete(const RCP< ParameterList > &params=null) {
    XPETRA_MONITOR("EpetraCrsGraphT::fillComplete");

    graph_->FillComplete();
    bool doOptimizeStorage = true;
    if (params != null && params->get("Optimize Storage",true) == false) doOptimizeStorage = false;
    if (doOptimizeStorage) graph_->OptimizeStorage();
  }
  //@}

  //! @name Methods implementing RowGraph.
  //@{

  //! Returns the communicator.
  RCP< const Comm< int > >  getComm() const {
    XPETRA_MONITOR("EpetraCrsGraphT::getComm");
    return toXpetra (graph_->Comm ());
  }

  //! Returns the Map that describes the row distribution in this graph.
  RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > >  getRowMap() const { XPETRA_MONITOR("EpetraCrsGraphT::getRowMap"); return toXpetra<GlobalOrdinal,Node>(graph_->RowMap()); }

  //! Returns the Map that describes the column distribution in this graph.
  RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > >  getColMap() const { XPETRA_MONITOR("EpetraCrsGraphT::getColMap"); return toXpetra<GlobalOrdinal,Node>(graph_->ColMap()); }

  //! Returns the Map associated with the domain of this graph.
  RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > >  getDomainMap() const { XPETRA_MONITOR("EpetraCrsGraphT::getDomainMap"); return toXpetra<GlobalOrdinal,Node>(graph_->DomainMap()); }

  //! Returns the Map associated with the domain of this graph.
  RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > >  getRangeMap() const { XPETRA_MONITOR("EpetraCrsGraphT::getRangeMap"); return toXpetra<GlobalOrdinal,Node>(graph_->RangeMap()); }

  //! Returns the importer associated with this graph.
  RCP< const Import< LocalOrdinal, GlobalOrdinal, Node > > getImporter() const { XPETRA_MONITOR("EpetraCrsGraphT::getImporter"); return toXpetra<GlobalOrdinal,Node>(graph_->Importer()); }

  //! Returns the exporter associated with this graph.
  RCP< const Export< LocalOrdinal, GlobalOrdinal, Node > > getExporter() const { XPETRA_MONITOR("EpetraCrsGraphT::getExporter"); return toXpetra<GlobalOrdinal,Node>(graph_->Exporter()); }

  //! Returns the number of global rows in the graph.
  global_size_t getGlobalNumRows() const { XPETRA_MONITOR("EpetraCrsGraphT::getGlobalNumRows"); return graph_->NumGlobalRows64(); }

  //! Returns the number of global columns in the graph.
  global_size_t getGlobalNumCols() const { XPETRA_MONITOR("EpetraCrsGraphT::getGlobalNumCols"); return graph_->NumGlobalCols64(); }

  //! Returns the number of graph rows owned on the calling node.
  size_t getNodeNumRows() const { XPETRA_MONITOR("EpetraCrsGraphT::getNodeNumRows"); return graph_->NumMyRows(); }

  //! Returns the number of columns connected to the locally owned rows of this graph.
  size_t getNodeNumCols() const { XPETRA_MONITOR("EpetraCrsGraphT::getNodeNumCols"); return graph_->NumMyCols(); }

  //! Returns the index base for global indices for this graph.
  GlobalOrdinal getIndexBase() const { XPETRA_MONITOR("EpetraCrsGraphT::getIndexBase"); return (GlobalOrdinal) graph_->IndexBase64(); }

  //! Returns the global number of entries in the graph.
  global_size_t getGlobalNumEntries() const { XPETRA_MONITOR("EpetraCrsGraphT::getGlobalNumEntries"); return graph_->NumGlobalEntries64(); }

  //! Returns the local number of entries in the graph.
  size_t getNodeNumEntries() const { XPETRA_MONITOR("EpetraCrsGraphT::getNodeNumEntries"); return graph_->NumMyEntries(); }

  //! Returns the current number of entries on this node in the specified global row.
  size_t getNumEntriesInGlobalRow(GlobalOrdinal globalRow) const { XPETRA_MONITOR("EpetraCrsGraphT::getNumEntriesInGlobalRow"); return graph_->NumGlobalIndices(globalRow); }

  //! Returns the current number of entries on this node in the specified local row.
  size_t getNumEntriesInLocalRow(LocalOrdinal localRow) const { XPETRA_MONITOR("EpetraCrsGraphT::getNumEntriesInLocalRow"); return graph_->NumMyIndices(localRow); }

  //! Returns the current number of allocated entries for this node in the specified global row .
  size_t getNumAllocatedEntriesInGlobalRow(GlobalOrdinal globalRow) const { XPETRA_MONITOR("EpetraCrsGraphT::getNumAllocatedEntriesInGlobalRow"); return graph_->NumAllocatedGlobalIndices(globalRow); }

  //! Returns the current number of allocated entries on this node in the specified local row.
  size_t getNumAllocatedEntriesInLocalRow(LocalOrdinal localRow) const { XPETRA_MONITOR("EpetraCrsGraphT::getNumAllocatedEntriesInLocalRow"); return graph_->NumAllocatedMyIndices(localRow); }

  //! Returns the number of global diagonal entries, based on global row/column index comparisons.
  global_size_t getGlobalNumDiags() const { XPETRA_MONITOR("EpetraCrsGraphT::getGlobalNumDiags"); return graph_->NumGlobalDiagonals64(); }

  //! Returns the number of local diagonal entries, based on global row/column index comparisons.
  size_t getNodeNumDiags() const { XPETRA_MONITOR("EpetraCrsGraphT::getNodeNumDiags"); return graph_->NumMyDiagonals(); }

  //! Maximum number of entries in all rows over all processes.
  size_t getGlobalMaxNumRowEntries() const { XPETRA_MONITOR("EpetraCrsGraphT::getGlobalMaxNumRowEntries"); return graph_->GlobalMaxNumIndices(); }

  //! Maximum number of entries in all rows owned by the calling process.
  size_t getNodeMaxNumRowEntries() const { XPETRA_MONITOR("EpetraCrsGraphT::getNodeMaxNumRowEntries"); return graph_->MaxNumIndices(); }

  //! Whether the graph has a column Map.
  bool hasColMap() const { XPETRA_MONITOR("EpetraCrsGraphT::hasColMap"); return graph_->HaveColMap(); }

  //! Whether the graph is locally lower triangular.
  bool isLowerTriangular() const { XPETRA_MONITOR("EpetraCrsGraphT::isLowerTriangular"); return graph_->LowerTriangular(); }

  //! Whether the graph is locally upper triangular.
  bool isUpperTriangular() const { XPETRA_MONITOR("EpetraCrsGraphT::isUpperTriangular"); return graph_->UpperTriangular(); }

  //! Whether column indices are stored using local indices on the calling process.
  bool isLocallyIndexed() const { XPETRA_MONITOR("EpetraCrsGraphT::isLocallyIndexed"); return graph_->IndicesAreLocal(); }

  //! Whether column indices are stored using global indices on the calling process.
  bool isGloballyIndexed() const { XPETRA_MONITOR("EpetraCrsGraphT::isGloballyIndexed"); return graph_->IndicesAreGlobal(); }

  //! Whether fillComplete() has been called and the graph is in compute mode.
  bool isFillComplete() const { XPETRA_MONITOR("EpetraCrsGraphT::isFillComplete"); return graph_->Filled(); }

  //! Returns true if storage has been optimized.
  bool isStorageOptimized() const { XPETRA_MONITOR("EpetraCrsGraphT::isStorageOptimized"); return graph_->StorageOptimized(); }

  //! Return a const, nonpersisting view of global indices in the given row.
  void getGlobalRowView(GlobalOrdinal GlobalRow, ArrayView<const GlobalOrdinal> &Indices) const {
    XPETRA_MONITOR("EpetraCrsGraphT::getGlobalRowView");

    int      numEntries;
    GlobalOrdinal    * eIndices;

    XPETRA_ERR_CHECK(graph_->ExtractGlobalRowView(GlobalRow, numEntries, eIndices));
    if (numEntries == 0) { eIndices = NULL; } // Cf. TEUCHOS_TEST_FOR_EXCEPT( p == 0 && size_in != 0 ) in Teuchos ArrayView constructor.

    Indices = ArrayView<const GlobalOrdinal>(eIndices, numEntries);
  }

  //! Return a const, nonpersisting view of local indices in the given row.
  void getLocalRowView(LocalOrdinal LocalRow, ArrayView<const LocalOrdinal> &indices) const {
    XPETRA_MONITOR("EpetraCrsGraphT::getLocalRowView");

    int      numEntries;
    int    * eIndices;

    XPETRA_ERR_CHECK(graph_->ExtractMyRowView(LocalRow, numEntries, eIndices));
    if (numEntries == 0) { eIndices = NULL; } // Cf. TEUCHOS_TEST_FOR_EXCEPT( p == 0 && size_in != 0 ) in Teuchos ArrayView constructor.

    indices = ArrayView<const int>(eIndices, numEntries);
  }
  //@}

  //! @name Overridden from Teuchos::Describable
  //@{

  //! Return a simple one-line description of this object.
  std::string description() const { XPETRA_MONITOR("EpetraCrsGraphT::description"); return "NotImplemented"; }

  //! Print the object with some verbosity level to an FancyOStream object.
  void describe(Teuchos::FancyOStream &out, const Teuchos::EVerbosityLevel verbLevel=Teuchos::Describable::verbLevel_default) const {
    XPETRA_MONITOR("EpetraCrsGraphT::describe");

    out << "EpetraCrsGraphT::describe : Warning, verbosity level is ignored by this method." << std::endl;
    const Epetra_BlockMap rowmap = graph_->RowMap();
    if (rowmap.Comm().MyPID() == 0) out << "** EpetraCrsGraphT **\n\nrowmap" << std::endl;
    rowmap.Print(out);
    graph_->Print(out);
  }

  //@}

  //! Implements DistObject interface
  //{@

  //! Access function for the Tpetra::Map this DistObject was constructed with.
  Teuchos::RCP< const Map< LocalOrdinal, GlobalOrdinal, Node > > getMap() const { XPETRA_MONITOR("EpetraCrsGraphT::getMap"); return toXpetra<GlobalOrdinal,Node>(graph_->Map()); }

  //! Import.
  void doImport(const DistObject<GlobalOrdinal, LocalOrdinal, GlobalOrdinal, Node> &source,
      const Import<LocalOrdinal, GlobalOrdinal, Node> &importer, CombineMode CM) {
    XPETRA_MONITOR("EpetraCrsGraphT::doImport");

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

    RCP<const Epetra_CrsGraph> v = tSource.getEpetra_CrsGraph();
    int err = graph_->Import(*v, *tImporter.getEpetra_Import(), toEpetra(CM));
    TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");
  }

  //! Export.
  void doExport(const DistObject<GlobalOrdinal, LocalOrdinal, GlobalOrdinal, Node> &dest,
      const Import<LocalOrdinal, GlobalOrdinal, Node>& importer, CombineMode CM) {
    XPETRA_MONITOR("EpetraCrsGraphT::doExport");

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

    RCP<const Epetra_CrsGraph> v = tDest.getEpetra_CrsGraph();
    int err = graph_->Export(*v, *tImporter.getEpetra_Import(), toEpetra(CM));
    TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");
  }

  //! Import (using an Exporter).
  void doImport(const DistObject<GlobalOrdinal, LocalOrdinal, GlobalOrdinal, Node> &source,
      const Export<LocalOrdinal, GlobalOrdinal, Node>& exporter, CombineMode CM) {
    XPETRA_MONITOR("EpetraCrsGraphT::doImport");

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

    RCP<const Epetra_CrsGraph> v = tSource.getEpetra_CrsGraph();
    int err = graph_->Import(*v, *tExporter.getEpetra_Export(), toEpetra(CM));
    TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");

  }

  //! Export (using an Importer).
  void doExport(const DistObject<GlobalOrdinal, LocalOrdinal, GlobalOrdinal, Node> &dest,
      const Export<LocalOrdinal, GlobalOrdinal, Node>& exporter, CombineMode CM) {
    XPETRA_MONITOR("EpetraCrsGraphT::doExport");

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

    RCP<const Epetra_CrsGraph> v = tDest.getEpetra_CrsGraph();
    int err = graph_->Export(*v, *tExporter.getEpetra_Export(), toEpetra(CM));
    TEUCHOS_TEST_FOR_EXCEPTION(err != 0, std::runtime_error, "Catch error code returned by Epetra.");
  }
  //@}

  //! @name Xpetra specific
  //@{

  //! EpetraCrsGraphT constructor to wrap a Epetra_CrsGraph object
  EpetraCrsGraphT(const Teuchos::RCP<Epetra_CrsGraph> &graph) : graph_(graph) {
    TEUCHOS_TEST_FOR_EXCEPTION(!graph->RowMap().GlobalIndicesIsType<GlobalOrdinal>(), std::runtime_error, "Xpetra::EpetraCrsGraphT: GlobalOrdinal mismatch.");
  }

  //! Get the underlying Epetra graph
  RCP< const Epetra_CrsGraph> getEpetra_CrsGraph() const { return graph_; }

  //@}

private:

  RCP<Epetra_CrsGraph> graph_;


};
#endif // specialization on Node=EpetraNode and GO=int

} // Xpetra namespace

#endif // XPETRA_EPETRACRSGRAPH_HPP