Ifpack_METISReordering.h

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00001 /*@HEADER
00002 // ***********************************************************************
00003 //
00004 //       Ifpack: Object-Oriented Algebraic Preconditioner Package
00005 //                 Copyright (2002) Sandia Corporation
00006 //
00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
00008 // license for use of this work by or on behalf of the U.S. Government.
00009 //
00010 // This library is free software; you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as
00012 // published by the Free Software Foundation; either version 2.1 of the
00013 // License, or (at your option) any later version.
00014 //
00015 // This library is distributed in the hope that it will be useful, but
00016 // WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //
00020 // You should have received a copy of the GNU Lesser General Public
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00028 */
00029 
00030 #ifndef IFPACK_METISREORDERING_H
00031 #define IFPACK_METISREORDERING_H
00032 
00033 #include "Ifpack_ConfigDefs.h"
00034 #include "Ifpack_Reordering.h"
00035 #include "Epetra_RowMatrix.h"
00036 #include "Teuchos_ParameterList.hpp"
00037 #include "Teuchos_RefCountPtr.hpp"
00038 
00039 class Epetra_Comm;
00040 class Ifpack_Graph;
00041 class Epetra_Map;
00042 class Epetra_BlockMap;
00043 class Epetra_Import;
00044 
00046 
00047 class Ifpack_METISReordering : public Ifpack_Reordering {
00048 
00049 public:
00050 
00052   Ifpack_METISReordering();
00053 
00055   virtual ~Ifpack_METISReordering() {};
00056 
00058   virtual int SetParameter(const string Name, const int Value)
00059   {
00060     if (Name == "partitioner: use symmetric graph")
00061       UseSymmetricGraph_ = (bool)Value;
00062     return(0);
00063   }
00064  
00066   virtual int SetParameter(const string Name, const double Value)
00067   {
00068     return(0);
00069   };
00070 
00072   virtual int SetParameters(Teuchos::ParameterList& List)
00073   {
00074     UseSymmetricGraph_ = List.get("partitioner: use symmetric graph", 
00075           UseSymmetricGraph_);
00076 
00077     return(0);
00078   }
00079 
00081   virtual int Compute(const Ifpack_Graph& Graph);
00082 
00084   virtual int Compute(const Epetra_RowMatrix& Matrix);
00085 
00087   virtual bool IsComputed() const
00088   {
00089     return(IsComputed_);
00090   }
00091 
00093   virtual int Reorder(const int i) const;
00094 
00096   virtual int InvReorder(const int i) const;
00097 
00099   virtual int P(const Epetra_MultiVector& Xorig,
00100     Epetra_MultiVector& X) const;
00101 
00103   virtual int Pinv(const Epetra_MultiVector& Xorig,
00104        Epetra_MultiVector& X) const;
00105 
00107   virtual ostream& Print(std::ostream& os) const;
00108 
00109 private:
00111   bool UseSymmetricGraph_;
00113   int NumMyRows_;
00115   bool IsComputed_;
00117   std::vector<int> Reorder_;
00119   std::vector<int> InvReorder_;
00120 
00121 }; // class Ifpack_METISReordering
00122 
00123 #endif // IFPACK_METISREORDERING_H
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