Ifpack_AMDReordering.h

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//       Ifpack: Object-Oriented Algebraic Preconditioner Package
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#ifndef IFPACK_AMDREORDERING_H
#define IFPACK_AMDREORDERING_H

#include "Ifpack_ConfigDefs.h"
#include "Ifpack_Reordering.h"

namespace Teuchos {
  class ParameterList;
}
class Ifpack_Graph;
class Epetra_MultiVector;
class Epetra_RowMatrix;


class Ifpack_AMDReordering : public Ifpack_Reordering {

public:

  Ifpack_AMDReordering();

  Ifpack_AMDReordering(const Ifpack_AMDReordering& RHS);

  Ifpack_AMDReordering& operator=(const Ifpack_AMDReordering& RHS);

  virtual ~Ifpack_AMDReordering() {};

  int SetParameter(const std::string Name, const int Value);

  int SetParameter(const std::string Name, const double Value);

  int SetParameters(Teuchos::ParameterList& List);

  int Compute(const Ifpack_Graph& Graph);

  int Compute(const Epetra_RowMatrix& Matrix);

  bool IsComputed() const
  {
    return(IsComputed_);
  }

  inline int Reorder(const int i) const;

  inline int InvReorder(const int i) const;

  int P(const Epetra_MultiVector& Xorig,
        Epetra_MultiVector& Xreord) const;

  int Pinv(const Epetra_MultiVector& Xorig,
           Epetra_MultiVector& Xinvreord) const;


  std::ostream& Print(std::ostream& os) const;

  int NumMyRows() const
  {
    return(NumMyRows_);
  }

private:
  int NumMyRows_;
  bool IsComputed_;
  std::vector<int> Reorder_;
  std::vector<int> InvReorder_;
};

#endif