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// ***********************************************************************
//
// EpetraExt: Epetra Extended - Linear Algebra Services Package
// Copyright (2001) 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
// USA
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
//@HEADER
#ifndef EpetraExt_AMESOS_BTF_GLOBAL_LINEARPROBLEM_H
#define EpetraExt_AMESOS_BTF_GLOBAL_LINEARPROBLEM_H
#include <EpetraExt_Transform.h>
#include <Teuchos_RCP.hpp>
#include <vector>
#include <string>
class Epetra_CrsMatrix;
class Epetra_MultiVector;
class Epetra_CrsGraph;
class Epetra_Map;
class Epetra_Import;
class Epetra_LinearProblem;
namespace EpetraExt {
///
/** Block Triangular Factorization (Reordering) of an Epetra_CrsMatrix
*
* Uses Tim Davis' BTF algorithm to find a block lower or upper triangular
* ordering form a Epetra_CrsMatrix.
*/
class AmesosBTFGlobal_LinearProblem: public SameTypeTransform<Epetra_LinearProblem> {
public:
~AmesosBTFGlobal_LinearProblem();
AmesosBTFGlobal_LinearProblem( double thresh = 0.0, const std::string& balanceType="linear",
bool upperTri = false, bool verbose = false, bool debug = false )
: numBlocks_(0),
analysisDone_(false),
threshold_(thresh),
upperTri_(upperTri),
verbose_(verbose),
debug_(debug),
balance_(balanceType)
{}
NewTypeRef operator()( OriginalTypeRef orig );
bool fwd();
bool rvs();
Teuchos::RCP<Epetra_Import> Importer() { return Importer_; }
std::vector<int> RowPerm() { return rowPerm_; }
std::vector<int> ColPerm() { return colPerm_; }
std::vector<int> BlockPtr() { return blockPtr_; }
int NumBlocks() { return numBlocks_; }
private:
Teuchos::RCP<Epetra_Map> NewRowMap_;
Teuchos::RCP<Epetra_Map> NewColMap_;
// Old linear system (pre-transform)
Teuchos::RCP<Epetra_CrsMatrix> OldMatrix_;
Teuchos::RCP<Epetra_MultiVector> OldRHS_;
Teuchos::RCP<Epetra_MultiVector> OldLHS_;
Teuchos::RCP<Epetra_CrsMatrix> NewMatrix_;
Teuchos::RCP<Epetra_MultiVector> NewRHS_;
Teuchos::RCP<Epetra_MultiVector> NewLHS_;
Teuchos::RCP<Epetra_CrsGraph> NewGraph_;
Teuchos::RCP<Epetra_Import> Importer_, Importer2_;
std::vector<int> rowPerm_, colPerm_, blockPtr_;
int numBlocks_;
bool analysisDone_;
const double threshold_;
const bool upperTri_, verbose_, debug_;
std::string balance_;
};
} //namespace EpetraExt
#endif //EpetraExt_AMESOS_BTF_GLOBAL_LINEARPROBLEM_H
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