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EpetraExt_BlockUtility.h
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00004 //     EpetraExt: Epetra Extended - Linear Algebra Services Package
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00041 
00042 #ifndef EPETRAEXT_BLOCKUTILITY_H
00043 #define EPETRAEXT_BLOCKUTILITY_H
00044 
00045 #include <vector>
00046 
00047 #include <Epetra_CrsGraph.h>
00048 #include <Epetra_RowMatrix.h>
00049 
00051 
00052 namespace EpetraExt {
00053 
00054 class BlockUtility {
00055  public:
00056 
00064   static Epetra_Map * GenerateBlockMap( const Epetra_BlockMap & BaseMap, const int*  RowIndices, int num_indices, const Epetra_Comm & GlobalComm, int Offset = 0 );
00065 
00073   static Epetra_Map * GenerateBlockMap( const Epetra_BlockMap & BaseMap, const std::vector<int> & RowIndices, const Epetra_Comm & GlobalComm, int Offset = 0 );
00074 
00082   static Epetra_Map * GenerateBlockMap( const Epetra_BlockMap & BaseMap, const Epetra_BlockMap& BlockMap, const Epetra_Comm & GlobalComm, int Offset = 0 );
00083 
00085 
00094   static Epetra_CrsGraph * GenerateBlockGraph( const Epetra_CrsGraph & BaseGraph, const std::vector< std::vector<int> > & RowStencil, const std::vector<int> & RowIndices, const Epetra_Comm & GlobalComm );
00095 
00096   // Nearly identical version yet using RowMatrix interface instead of CrsGraph
00097   static Epetra_CrsGraph * GenerateBlockGraph( const Epetra_RowMatrix & BaseMatrix, const std::vector< std::vector<int> > & RowStencil, const std::vector<int> & RowIndices, const Epetra_Comm & GlobalComm );
00098 
00100   static Epetra_CrsGraph * GenerateBlockGraph( const Epetra_CrsGraph & BaseGraph, const Epetra_CrsGraph& LocalBlockGraph, const Epetra_Comm & GlobalComm );
00101 
00103   static void GenerateRowStencil(const Epetra_CrsGraph& LocalBlockGraph, std::vector<int> RowIndices, std::vector< std::vector<int> >& RowStencil);
00104 
00106   static int CalculateOffset(const Epetra_BlockMap & BaseMap);
00107   
00108 };
00109 
00110 } //namespace EpetraExt
00111 
00112 #endif /* EPETRA_CRSMATRIX_H */
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