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EpetraExt_View_CrsGraph.cpp
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41 
43 
44 #include <Epetra_CrsGraph.h>
45 #include <Epetra_BlockMap.h>
46 
47 #include <vector>
48 
49 namespace EpetraExt {
50 
53 {
54  if( newObj_ ) delete newObj_;
55 }
56 
60 {
61  origObj_ = &orig;
62 
63  //Error, must be local indices
64  assert( !orig.IndicesAreGlobal() );
65 
66  //test maps, new std::map must be left subset of old
67  const Epetra_BlockMap & oRowMap = orig.RowMap();
68  const Epetra_BlockMap & oColMap = orig.ColMap();
69 
70  int nNumRows = NewRowMap_->NumMyElements();
71  int nNumCols = 0;
72  if( NewColMap_ ) nNumCols = NewColMap_->NumMyElements();
73 
74  bool matched = true;
75  for( int i = 0; i < nNumRows; ++i )
76  matched = matched && ( oRowMap.GID64(i) == NewRowMap_->GID64(i) );
77  if( nNumCols )
78  for( int i = 0; i < nNumCols; ++i )
79  matched = matched && ( oColMap.GID64(i) == NewColMap_->GID64(i) );
80 
81  if( !matched ) std::cout << "EDT_CrsGraph_View: Bad Row or Col Mapping\n";
82  assert( matched );
83 
84  //intial construction of graph
85  std::vector<int> numIndices( nNumRows );
86  std::vector<int*> indices( nNumRows );
87  for( int i = 0; i < nNumRows; ++i )
88  {
89  orig.ExtractMyRowView( i, numIndices[i], indices[i] );
90  int j = 0;
91  if( nNumCols )
92  {
93  while( j < numIndices[i] && NewColMap_->GID64(indices[i][j]) != -1 ) ++j;
94  numIndices[i] = j;
95  }
96  }
97 
98  Epetra_CrsGraph * newGraph( new Epetra_CrsGraph( View,
99  *NewRowMap_,
100  *NewColMap_,
101  &numIndices[0] ) );
102 
103  //insert views of row indices
104  for( int i = 0; i < nNumRows; ++i )
105  newGraph->InsertMyIndices( i, numIndices[i], indices[i] );
106 
107  newGraph->FillComplete();
108 
109  newObj_ = newGraph;
110 
111  return *newGraph;
112 }
113 
114 } // namespace EpetraExt
115 
int InsertMyIndices(int LocalRow, int NumIndices, int *Indices)
int NumMyElements() const
NewTypeRef operator()(OriginalTypeRef orig)
Transformation Operator.