EpetraExt_Reindex_LinearProblem2.cpp

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//     EpetraExt: Epetra Extended - Linear Algebra Services Package
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#include <EpetraExt_Reindex_LinearProblem2.h>
 
#include <EpetraExt_Reindex_CrsMatrix.h>
#include <EpetraExt_Reindex_MultiVector.h>
 
#include <Epetra_LinearProblem.h>
#include <Epetra_CrsMatrix.h>
#include <Epetra_MultiVector.h>
#include <Epetra_Map.h>
 
namespace EpetraExt {
 
LinearProblem_Reindex2::
~LinearProblem_Reindex2()
{
  if( newObj_ ) delete newObj_;
 
  if( MatTrans_ ) delete MatTrans_;
  if( LHSTrans_ ) delete LHSTrans_;
  if( RHSTrans_ ) delete RHSTrans_;
 
  if( NewRowMapOwned_ ) delete NewRowMap_;
}
 
LinearProblem_Reindex2::NewTypeRef
LinearProblem_Reindex2::
operator()( OriginalTypeRef orig )
{
  // Save original object
  origObj_ = &orig;
 
  Epetra_CrsMatrix * OldMatrix = dynamic_cast<Epetra_CrsMatrix*>( orig.GetMatrix() );
  Epetra_MultiVector * OldRHS = orig.GetRHS();
  Epetra_MultiVector * OldLHS = orig.GetLHS();
  const Epetra_BlockMap & OldRowMap = OldMatrix->Map();
 
  //If new map not passed in create one with lex ordering
  if( !NewRowMap_ )
  {
    int NumMyElements = OldRowMap.NumMyElements();
 
#ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
    if(OldRowMap.GlobalIndicesInt()) {
      int NumGlobalElements = OldRowMap.NumGlobalElements();
      NewRowMap_ = new Epetra_Map( NumGlobalElements, NumMyElements, 0, OldRowMap.Comm() );
    }
    else
#endif
#ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
    if(OldRowMap.GlobalIndicesLongLong()) {
      long long NumGlobalElements = OldRowMap.NumGlobalElements64();
      NewRowMap_ = new Epetra_Map( NumGlobalElements, NumMyElements, 0LL, OldRowMap.Comm() );
    }
    else
#endif
      throw "LinearProblem_Reindex2::operator(): GlobalIndices type unknown";
    NewRowMapOwned_ = true;
  }
 
  MatTrans_ = new CrsMatrix_Reindex( *NewRowMap_ );
  LHSTrans_ = new MultiVector_Reindex( *NewRowMap_ );
  RHSTrans_ = new MultiVector_Reindex( *NewRowMap_ );
 
  Epetra_CrsMatrix * NewMatrix = &((*MatTrans_)( *OldMatrix ));
  Epetra_MultiVector * NewLHS = &((*LHSTrans_)( *OldLHS ));
  Epetra_MultiVector * NewRHS = &((*RHSTrans_)( *OldRHS ));
 
  newObj_ = new Epetra_LinearProblem( NewMatrix, NewLHS, NewRHS );
 
  return *newObj_;
}
 
bool LinearProblem_Reindex2::fwd()
{
  Epetra_MultiVector * OldRHS = origObj_->GetRHS();
  Epetra_MultiVector * OldLHS = origObj_->GetLHS();
 
  // Clean up x and b before creating new multivectors
  delete (newObj_->GetLHS());
  delete (newObj_->GetRHS());
 
  // Create new multivectors that view into the current LHS / RHS
  Epetra_MultiVector * NewLHS = &((*LHSTrans_)( *OldLHS ));
  Epetra_MultiVector * NewRHS = &((*RHSTrans_)( *OldRHS ));
 
  // Set the new LHS / RHS
  newObj_->SetLHS( NewLHS );
  newObj_->SetRHS( NewRHS );
 
  return true;
}
 
} //namespace EpetraExt