Ifpack_OverlapGraph.h

/*@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.
// 
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
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//  
// 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) 
// 
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//@HEADER
*/

#ifndef IFPACK_OVERLAPGRAPH_H
#define IFPACK_OVERLAPGRAPH_H

#include "Ifpack_ConfigDefs.h"
#include "Epetra_Object.h"
#include "Epetra_CrsGraph.h"
#include "Epetra_Import.h"
#include "Teuchos_RefCountPtr.hpp"

class Epetra_Comm;
class Epetra_BlockMap;
class Epetra_RowMatrix;

namespace Teuchos {
  class ParameterList;
}


class Ifpack_OverlapGraph: public Epetra_Object {

 public:


  Ifpack_OverlapGraph(const Teuchos::RefCountPtr<const Epetra_CrsGraph>& UserMatrixGraph, int OverlapLevel);


  Ifpack_OverlapGraph(const Teuchos::RefCountPtr<const Epetra_RowMatrix>& UserMatrix, int OverlapLevel);
  
  Ifpack_OverlapGraph(const Ifpack_OverlapGraph & Source);

  virtual ~Ifpack_OverlapGraph() {};

    
  /* This method is only available if the configure argument
     '--enable-ifpack-teuchos' was used.
     This method recognizes the name: level_overlap, which is case insensitive.
     The ParameterEntry must have type int.
  */
  int SetParameters(const Teuchos::ParameterList& parameterlist,
                    bool cerr_warning_if_unused=false);

  const Epetra_CrsGraph & OverlapGraph() const {return(*OverlapGraph_);}
    
  const Epetra_BlockMap & OverlapRowMap() const {return(*OverlapRowMap_);}
    
  const Epetra_Import & OverlapImporter() const {return(*OverlapImporter_);}
    

  int OverlapLevel() const {return(OverlapLevel_);}


  void Print(ostream& os) const {
    os << endl;
    if (UserMatrix_!=Teuchos::null) 
      os << "Overlap Graph created using the user's Epetra_RowMatrix object" << endl;
    else
      os << "Overlap Graph created using the user's Epetra_CrsGraph object" << endl;
    
    os << " Level of Overlap = " << OverlapLevel_ << endl;
    OverlapGraph_->Print(os);
    return;
  }

 protected:

  int ConstructOverlapGraph(const Teuchos::RefCountPtr<const Epetra_CrsGraph>& UserMatrixGraph);
  Teuchos::RefCountPtr<Epetra_CrsGraph> OverlapGraph_;
  Teuchos::RefCountPtr<const Epetra_CrsGraph> UserMatrixGraph_;
  Teuchos::RefCountPtr<const Epetra_RowMatrix> UserMatrix_;
  Teuchos::RefCountPtr<Epetra_BlockMap> OverlapRowMap_;
  Teuchos::RefCountPtr<Epetra_Import> OverlapImporter_;
  int OverlapLevel_;
  bool IsOverlapped_;
};
#endif // IFPACK_OVERLAPGRAPH_H

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