Ifpack_CrsIlut.h

Go to the documentation of this file.

/*@HEADER
// ***********************************************************************
//
//       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.
//
// 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 IFPACK_CRSILUT_H
#define IFPACK_CRSILUT_H
 
#include "Ifpack_ConfigDefs.h"
#include "Ifpack_ScalingType.h"
#include "Ifpack_OverlapGraph.h"
#include "Ifpack_OverlapFactorObject.h"
#include "Ifpack_OverlapSolveObject.h"
#include "Epetra_CompObject.h"
#include "Epetra_CrsMatrix.h"
#include "Epetra_Object.h"
class Epetra_Comm;
class Epetra_Map;
class Epetra_RowMatrix;
class Epetra_Vector;
class Epetra_MultiVector;

 
 
 
class Ifpack_CrsIlut: public Epetra_Object, public Epetra_CompObject, public Ifpack_OverlapFactorObject, public Ifpack_OverlapSolveObject {
  
 public:


  Ifpack_CrsIlut(const Ifpack_OverlapGraph * OverlapGraph, double DropTol = 1.0E-4, 
     double FillTol = 1.0);


  Ifpack_CrsIlut(const Epetra_RowMatrix * UserMatrix, double DropTol = 1.0E-4, 
     double FillTol = 1.0);
  
  Ifpack_CrsIlut(const Ifpack_CrsIlut & Source);
  
  virtual ~Ifpack_CrsIlut();


  int SetDropTol(double DropTol) {DropTol_ = DropTol; return(0);};

  int SetFillTol(double FillTol) {FillTol_ = FillTol; return(0);};

  /* This method is only available if the Teuchos package is enabled.
     This method recognizes two parameter names: drop_tolerance and
     fill_tolerance. These names are case insensitive. For both, the
     ParameterEntry must have type double.
  */
  int SetParameters(const Teuchos::ParameterList& parameterlist,
                    bool cerr_warning_if_unused=false);
  

  double DropTol() const {return(DropTol_);};

  double FillTol() const {return(FillTol_);};
  
 protected:

  int ProcessOverlapMatrix(const Epetra_RowMatrix &A);
  int DerivedFactor();
 
 private:
 
 double DropTol_;
 double FillTol_;
 
};
 
#endif /* IFPACK_CRSILUT_H */