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EpetraExt_Reindex_LinearProblem2.cpp
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00004 //     EpetraExt: Epetra Extended - Linear Algebra Services Package
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00041 
00042 #include <EpetraExt_Reindex_LinearProblem2.h>
00043 
00044 #include <EpetraExt_Reindex_CrsMatrix.h>
00045 #include <EpetraExt_Reindex_MultiVector.h>
00046 
00047 #include <Epetra_LinearProblem.h>
00048 #include <Epetra_CrsMatrix.h>
00049 #include <Epetra_MultiVector.h>
00050 #include <Epetra_Map.h>
00051 
00052 namespace EpetraExt {
00053 
00054 LinearProblem_Reindex2::
00055 ~LinearProblem_Reindex2()
00056 {
00057   if( newObj_ ) delete newObj_;
00058 
00059   if( MatTrans_ ) delete MatTrans_;
00060   if( LHSTrans_ ) delete LHSTrans_;
00061   if( RHSTrans_ ) delete RHSTrans_;
00062 
00063   if( NewRowMapOwned_ ) delete NewRowMap_;
00064 }
00065 
00066 LinearProblem_Reindex2::NewTypeRef
00067 LinearProblem_Reindex2::
00068 operator()( OriginalTypeRef orig )
00069 {
00070   // Save original object
00071   origObj_ = &orig;
00072 
00073   Epetra_CrsMatrix * OldMatrix = dynamic_cast<Epetra_CrsMatrix*>( orig.GetMatrix() );
00074   Epetra_MultiVector * OldRHS = orig.GetRHS();
00075   Epetra_MultiVector * OldLHS = orig.GetLHS();
00076   const Epetra_BlockMap & OldRowMap = OldMatrix->Map();
00077 
00078   //If new map not passed in create one with lex ordering
00079   if( !NewRowMap_ )
00080   {
00081     int NumMyElements = OldRowMap.NumMyElements();
00082 
00083 #ifndef EPETRA_NO_32BIT_GLOBAL_INDICES
00084   if(OldRowMap.GlobalIndicesInt()) {
00085   int NumGlobalElements = OldRowMap.NumGlobalElements();
00086     NewRowMap_ = new Epetra_Map( NumGlobalElements, NumMyElements, 0, OldRowMap.Comm() );
00087   }
00088   else
00089 #endif
00090 #ifndef EPETRA_NO_64BIT_GLOBAL_INDICES
00091   if(OldRowMap.GlobalIndicesLongLong()) {
00092   long long NumGlobalElements = OldRowMap.NumGlobalElements64();
00093     NewRowMap_ = new Epetra_Map( NumGlobalElements, NumMyElements, 0LL, OldRowMap.Comm() );
00094   }
00095   else
00096 #endif
00097     throw "LinearProblem_Reindex2::operator(): GlobalIndices type unknown";
00098 
00099     NewRowMapOwned_ = true;
00100   }
00101 
00102   MatTrans_ = new CrsMatrix_Reindex( *NewRowMap_ );
00103   LHSTrans_ = new MultiVector_Reindex( *NewRowMap_ );
00104   RHSTrans_ = new MultiVector_Reindex( *NewRowMap_ );
00105 
00106   Epetra_CrsMatrix * NewMatrix = &((*MatTrans_)( *OldMatrix ));
00107   Epetra_MultiVector * NewLHS = &((*LHSTrans_)( *OldLHS ));
00108   Epetra_MultiVector * NewRHS = &((*RHSTrans_)( *OldRHS ));
00109 
00110   newObj_ = new Epetra_LinearProblem( NewMatrix, NewLHS, NewRHS );
00111 
00112   return *newObj_;
00113 }
00114 
00115 bool LinearProblem_Reindex2::fwd()
00116 {
00117   Epetra_MultiVector * OldRHS = origObj_->GetRHS();
00118   Epetra_MultiVector * OldLHS = origObj_->GetLHS();
00119 
00120   // Clean up x and b before creating new multivectors
00121   delete (newObj_->GetLHS());
00122   delete (newObj_->GetRHS());
00123 
00124   // Create new multivectors that view into the current LHS / RHS
00125   Epetra_MultiVector * NewLHS = &((*LHSTrans_)( *OldLHS ));
00126   Epetra_MultiVector * NewRHS = &((*RHSTrans_)( *OldRHS ));
00127 
00128   // Set the new LHS / RHS
00129   newObj_->SetLHS( NewLHS );
00130   newObj_->SetRHS( NewRHS );
00131 
00132   return true;
00133 }
00134 
00135 } //namespace EpetraExt
00136 
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