IFPACK Development
Ifpack_METISPartitioner.h
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
00021 // License along with this library; if not, write to the Free Software
00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00023 // USA
00024 // Questions? Contact Michael A. Heroux (maherou@sandia.gov)
00025 //
00026 // ***********************************************************************
00027 //@HEADER
00028 */
00029 
00030 #ifndef IFPACK_METISPARTITIONER_H
00031 #define IFPACK_METISPARTITIONER_H
00032 
00033 #include "Ifpack_ConfigDefs.h"
00034 #include "Ifpack_Partitioner.h"
00035 #include "Ifpack_OverlappingPartitioner.h"
00036 #include "Teuchos_ParameterList.hpp"
00037 class Ifpack_Graph;
00038 class Epetra_Map;
00039 class Epetra_BlockMap;
00040 class Epetra_Import;
00041 
00043 
00052 class Ifpack_METISPartitioner : public Ifpack_OverlappingPartitioner {
00053 
00054 public:
00055 
00057   Ifpack_METISPartitioner(const Ifpack_Graph* Graph) :
00058     Ifpack_OverlappingPartitioner(Graph),
00059     UseSymmetricGraph_(true)
00060   {}
00061 
00063   virtual ~Ifpack_METISPartitioner() {};
00064 
00066   int SetPartitionParameters(Teuchos::ParameterList& List)
00067   {
00068     // `true' is the safest option, as singletons may still be
00069     // in the system, even after Ifpack_SingletonFilter (think
00070     // for example to an upper triangular matrix, which has one
00071     // singleton, and still has one after the elimination of 
00072     // the first one...)
00073     UseSymmetricGraph_ = List.get("partitioner: use symmetric graph", 
00074                   UseSymmetricGraph_);
00075 
00076     return(0);
00077   }
00078 
00080   int ComputePartitions();
00081 
00082 private:
00083   bool UseSymmetricGraph_;
00084 
00085 }; // class Ifpack_METISPartitioner
00086 
00087 #endif // IFPACK_METISPARTITIONER_H
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