EpetraExt_SubCopy_CrsMatrix.cpp

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#include "EpetraExt_SubCopy_CrsMatrix.h"

#include <Epetra_CrsMatrix.h>
#include <Epetra_Map.h>
#include <Epetra_Import.h>
#include <Epetra_IntSerialDenseVector.h>
#include <Epetra_LongLongSerialDenseVector.h>
#include <Epetra_GIDTypeSerialDenseVector.h>
#include <vector>

namespace EpetraExt {

CrsMatrix_SubCopy::
~CrsMatrix_SubCopy()
{
  if( newObj_ ) delete newObj_;
}

template<typename int_type>
CrsMatrix_SubCopy::NewTypeRef
CrsMatrix_SubCopy::
transform( OriginalTypeRef orig )
{
  origObj_ = &orig;

  //Error, must be local indices
  assert( orig.Filled() );

  //test maps, new map must be subset of old
  const Epetra_Map & oRowMap = orig.RowMap();
  const Epetra_Map & oColMap = orig.ColMap();

  int oNumRows = oRowMap.NumMyElements();
  (void) oNumRows; // Silence "unused variable" compiler warning.
  int oNumCols = oColMap.NumMyElements();
  int nNumRows = newRowMap_.NumMyElements();
  int nNumDomain = newDomainMap_.NumMyElements();

  bool matched = true;

  // Make sure all rows in newRowMap are already on this processor
  for( int i = 0; i < nNumRows; ++i )
    matched = matched && ( oRowMap.MyGID(newRowMap_.GID64(i)) );
  if( !matched ) std::cerr << "EDT_CrsMatrix_SubCopy: Bad new_row_Map.  GIDs of new row map must be GIDs of the original row map on the same processor.\n";

  // Make sure all GIDs in the new domain map are GIDs in the old domain map
  if( !newRangeMap_.SameAs(newDomainMap_) ) {
    Epetra_IntSerialDenseVector pidList(nNumDomain);
  int_type* newDomainMap_MyGlob = 0;
  newDomainMap_.MyGlobalElementsPtr(newDomainMap_MyGlob);
    oColMap.RemoteIDList(newDomainMap_.NumMyElements(), newDomainMap_MyGlob, pidList.Values(), 0);
    for( int i = 0; i < nNumDomain; ++i )
      matched = matched && ( pidList[i]>=0 );
  }

  if( !matched ) std::cout << "EDT_CrsMatrix_SubCopy: Bad newDomainMap.  One or more GIDs in new domain map are not part of original domain map.\n";
  assert( matched );


  // Next build new column map
  Epetra_IntSerialDenseVector pidList(oNumCols);
  Epetra_IntSerialDenseVector lidList(oNumCols);
  Epetra_IntSerialDenseVector sizeList(oNumCols);
  int_type* oColMap_MyGlob = 0;
  oColMap.MyGlobalElementsPtr(oColMap_MyGlob);
  newDomainMap_.RemoteIDList(oColMap.NumMyElements(), oColMap_MyGlob, pidList.Values(), 0);
  int numNewCols = 0;
  typename Epetra_GIDTypeSerialDenseVector<int_type>::impl newColMapGidList(oNumCols);
  int_type * origColGidList = 0;
  oColMap.MyGlobalElementsPtr(origColGidList);
  for( int i = 0; i < oNumCols; ++i )
    if (pidList[i] >=0)
      newColMapGidList[numNewCols++]= origColGidList[i];
  newColMap_ = Epetra_Map(-1, numNewCols, newColMapGidList.Values(), 0, oColMap.Comm());

  importer_ = new Epetra_Import(newRowMap_, oRowMap);

  Epetra_CrsMatrix * newMatrix = new Epetra_CrsMatrix(Copy, newRowMap_, newColMap_, 0);

  newObj_ = newMatrix;

  newObj_->Import(*origObj_, *importer_, Add);

  newObj_->FillComplete();

  return *newObj_;
}

//==============================================================================

CrsMatrix_SubCopy::NewTypeRef
CrsMatrix_SubCopy::
operator()( OriginalTypeRef orig )
{
  const Epetra_Map & oRowMap = orig.RowMap();
  const Epetra_Map & oColMap = orig.ColMap();

#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
  if(oRowMap.GlobalIndicesInt() && oColMap.GlobalIndicesInt()) {
    return transform<int>(orig);
  }
  else
#endif
#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
  if(oRowMap.GlobalIndicesLongLong() && oColMap.GlobalIndicesLongLong()) {
    return transform<long long>(orig);
  }
  else
#endif
    throw "CrsMatrix_SubCopy::operator(): GlobalIndices type unknown";
}

//==============================================================================
bool CrsMatrix_SubCopy::fwd()
{

  if (newObj_->Filled()) newObj_->PutScalar(0.0); // zero contents

  newObj_->Import(*origObj_, *importer_, Add);

  newObj_->FillComplete();


  return (true);
}

//==============================================================================
bool CrsMatrix_SubCopy::rvs()
{
  if (!newObj_->Filled()) return(false); // Must have fillCompleted

  origObj_->Export(*newObj_, *importer_, Add);

  origObj_->FillComplete();

  return (true);
}

} // namespace EpetraExt