Tpetra Matrix/Vector Services Version of the Day
Tpetra_EpetraRowMatrix.hpp
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00005 //          Tpetra: Templated Linear Algebra Services Package
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00043 
00044 #ifndef TPETRA_EPETRAROWMATRIX_HPP
00045 #define TPETRA_EPETRAROWMATRIX_HPP
00046 
00047 #include <Tpetra_ConfigDefs.hpp>
00048 
00049 #if defined(HAVE_TPETRA_EPETRA)
00050 
00051 #include <Epetra_Comm.h>
00052 #include <Epetra_BasicRowMatrix.h>
00053 #include <Tpetra_CrsMatrix.hpp>
00054 
00055 namespace Tpetra
00056 {
00057 
00059 template<class TpetraMatrixType>
00060 class EpetraRowMatrix : public Epetra_BasicRowMatrix {
00061 public:
00062   EpetraRowMatrix(const Teuchos::RCP<TpetraMatrixType> &mat, const Epetra_Comm &comm);
00063   virtual ~EpetraRowMatrix();
00064 
00065   int ExtractMyRowCopy(int MyRow, int Length, int & NumEntries, double *Values, int * Indices) const;
00066 
00067   //not implemented
00068   int ExtractMyEntryView(int CurEntry, double * & Value, int & RowIndex, int & ColIndex);
00069 
00070   //not implemented
00071   int ExtractMyEntryView(int CurEntry, double const * & Value, int & RowIndex, int & ColIndex) const;
00072 
00073   int NumMyRowEntries(int MyRow, int & NumEntries) const;
00074 
00075 private:
00076   Teuchos::RCP<TpetraMatrixType> tpetra_matrix_;
00077 };//class EpetraRowMatrix
00078 
00079 template<class TpetraMatrixType>
00080 EpetraRowMatrix<TpetraMatrixType>::EpetraRowMatrix(
00081   const Teuchos::RCP<TpetraMatrixType> &mat, const Epetra_Comm &comm
00082   )
00083  : Epetra_BasicRowMatrix(comm),
00084    tpetra_matrix_(mat)
00085 {
00086   int globalNumRows = tpetra_matrix_->getRowMap()->getGlobalNumElements();
00087   int globalNumCols = tpetra_matrix_->getColMap()->getGlobalNumElements();
00088   Teuchos::ArrayView<const int> row_elem_list = tpetra_matrix_->getRowMap()->getNodeElementList();
00089   Teuchos::ArrayView<const int> col_elem_list = tpetra_matrix_->getColMap()->getNodeElementList();
00090   Epetra_Map rowmap(globalNumRows, row_elem_list.size(), row_elem_list.getRawPtr(), 0, comm);
00091   Epetra_Map colmap(globalNumCols, col_elem_list.size(), col_elem_list.getRawPtr(), 0, comm);
00092   SetMaps(rowmap, colmap);
00093 }
00094 
00095 template<class TpetraMatrixType>
00096 EpetraRowMatrix<TpetraMatrixType>::~EpetraRowMatrix()
00097 {
00098 }
00099 
00100 template<class TpetraMatrixType>
00101 int EpetraRowMatrix<TpetraMatrixType>::ExtractMyRowCopy(int MyRow, int Length, int & NumEntries, double *Values, int * Indices) const
00102 {
00103   Teuchos::ArrayView<int> inds(Indices, Length);
00104   Teuchos::ArrayView<double> vals(Values, Length);
00105   size_t num_entries = NumEntries;
00106   tpetra_matrix_->getLocalRowCopy(MyRow, inds, vals, num_entries);
00107   NumEntries = num_entries;
00108   return 0;
00109 }
00110 
00111 template<class TpetraMatrixType>
00112 int EpetraRowMatrix<TpetraMatrixType>::ExtractMyEntryView(int CurEntry, double * & Value, int & RowIndex, int & ColIndex)
00113 {
00114   //not implemented
00115   return -1;
00116 }
00117 
00118 template<class TpetraMatrixType>
00119 int EpetraRowMatrix<TpetraMatrixType>::ExtractMyEntryView(int CurEntry, double const * & Value, int & RowIndex, int & ColIndex) const
00120 {
00121   //not implemented
00122   return -1;
00123 }
00124 
00125 template<class TpetraMatrixType>
00126 int EpetraRowMatrix<TpetraMatrixType>::NumMyRowEntries(int MyRow, int & NumEntries) const
00127 {
00128   NumEntries = tpetra_matrix_->getNumEntriesInLocalRow(MyRow);
00129   return 0;
00130 }
00131 
00132 }//namespace Tpetra
00133 
00134 #endif // defined(HAVE_TPETRA_EPETRA)
00135 
00136 //here is the include-guard #endif:
00137 
00138 #endif
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