Ifpack2_LinePartitioner_decl.hpp

/*@HEADER
// ***********************************************************************
//
//       Ifpack2: Templated Object-Oriented Algebraic Preconditioner Package
//                 Copyright (2009) 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.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
//@HEADER
*/

#ifndef IFPACK2_LINEPARTITIONER_DECL_HPP
#define IFPACK2_LINEPARTITIONER_DECL_HPP

#include "Ifpack2_ConfigDefs.hpp"
#include "Ifpack2_OverlappingPartitioner.hpp"
#include "Tpetra_MultiVector.hpp"

namespace Ifpack2 {



  template<class GraphType,class Scalar>
class LinePartitioner : public OverlappingPartitioner<GraphType> {
public:
  typedef typename GraphType::local_ordinal_type local_ordinal_type;
  typedef typename GraphType::global_ordinal_type global_ordinal_type;
  typedef typename GraphType::node_type node_type;
  typedef Tpetra::RowGraph<local_ordinal_type, global_ordinal_type, node_type>  row_graph_type;
  typedef Tpetra::MultiVector<double,local_ordinal_type, global_ordinal_type, node_type>  multivector_type;


  LinePartitioner(const Teuchos::RCP<const row_graph_type>& graph);

  virtual ~LinePartitioner();

  void setPartitionParameters(Teuchos::ParameterList& List);

  void computePartitions();

private:
    // Useful functions
  int Compute_Blocks_AutoLine(Teuchos::ArrayView<local_ordinal_type> blockIndices) const;
  void local_automatic_line_search(int NumEqns, Teuchos::ArrayView <local_ordinal_type> blockIndices, local_ordinal_type last, local_ordinal_type next, local_ordinal_type LineID, double tol, Teuchos::Array<local_ordinal_type> itemp, Teuchos::Array<double> dtemp) const;



  // User data
  int NumEqns_;
  Teuchos::RCP<multivector_type> coord_;
  double threshold_;

};

}// namespace Ifpack2

#endif // IFPACK2_LINEPARTITIONER_DECL_HPP