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// ***********************************************************************
//
// Ifpack: Object-Oriented Algebraic Preconditioner Package
// Copyright (2002) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
//@HEADER
*/
#ifndef IFPACK_METISPARTITIONER_H
#define IFPACK_METISPARTITIONER_H
#include "Ifpack_ConfigDefs.h"
#include "Ifpack_Partitioner.h"
#include "Ifpack_OverlappingPartitioner.h"
#include "Teuchos_ParameterList.hpp"
class Ifpack_Graph;
class Epetra_Map;
class Epetra_BlockMap;
class Epetra_Import;
//! Ifpack_METISPartitioner: A class to decompose Ifpack_Graph's using METIS.
/*!
Class Ifpack_METISPartitioner enables the decomposition of the local
Ifpack_Graph's using METIS. In order to work properly, this class requires
IFPACK to be configured with option \c --enable-ifpack-metis.
Otherwise, this class will always create one partition.
\date Last modified: Oct-04.
*/
class Ifpack_METISPartitioner : public Ifpack_OverlappingPartitioner {
public:
//! Constructor.
Ifpack_METISPartitioner(const Ifpack_Graph* Graph) :
Ifpack_OverlappingPartitioner(Graph),
UseSymmetricGraph_(true)
{}
//! Destructor.
virtual ~Ifpack_METISPartitioner() {};
//! Sets all the parameters for the partitioner (none at moment).
int SetPartitionParameters(Teuchos::ParameterList& List)
{
// `true' is the safest option, as singletons may still be
// in the system, even after Ifpack_SingletonFilter (think
// for example to an upper triangular matrix, which has one
// singleton, and still has one after the elimination of
// the first one...)
UseSymmetricGraph_ = List.get("partitioner: use symmetric graph",
UseSymmetricGraph_);
return(0);
}
//! Computes the partitions. Returns 0 if successful.
int ComputePartitions();
private:
bool UseSymmetricGraph_;
}; // class Ifpack_METISPartitioner
#endif // IFPACK_METISPARTITIONER_H
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