Ifpack_OverlapGraph.h

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//       Ifpack: Object-Oriented Algebraic Preconditioner Package
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#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_in, int OverlapLevel_in);


  Ifpack_OverlapGraph(const Teuchos::RefCountPtr<const Epetra_RowMatrix>& UserMatrix_in, int OverlapLevel_in);

  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(std::ostream& os) const {
    using std::endl;

    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