Ifpack_LocalFilter.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
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// 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)
//
// ***********************************************************************
//@HEADER
*/

#ifndef IFPACK_LOCALFILTER_H
#define IFPACK_LOCALFILTER_H

#include "Ifpack_ConfigDefs.h"
#ifdef HAVE_MPI
#include "Epetra_MpiComm.h"
#else
#include "Epetra_SerialComm.h"
#endif
#include "Epetra_RowMatrix.h"
#include "Teuchos_RefCountPtr.hpp"

class Epetra_Map;
class Epetra_MultiVector;
class Epetra_Vector;
class Epetra_Import;
class Epetra_BlockMap;


class Ifpack_LocalFilter : public virtual Epetra_RowMatrix {

public:

  Ifpack_LocalFilter(const Teuchos::RefCountPtr<const Epetra_RowMatrix>& Matrix);



  virtual ~Ifpack_LocalFilter() {};




  virtual int NumMyRowEntries(int MyRow, int & NumEntries) const
  {
    NumEntries = NumEntries_[MyRow];
    return(0);
  }

  virtual int MaxNumEntries() const
  {
    return(MaxNumEntries_);
  }


  virtual inline int ExtractMyRowCopy(int MyRow, int Length, int & NumEntries, double *Values, int * Indices) const;


  virtual int ExtractDiagonalCopy(Epetra_Vector & Diagonal) const;



  virtual int Multiply(bool TransA, const Epetra_MultiVector& X, Epetra_MultiVector& Y) const
  {
    if (TransA == true) {
      IFPACK_CHK_ERR(-1);
    }

    IFPACK_CHK_ERR(Apply(X,Y));
    return(0);
  }

  virtual int Solve(bool Upper, bool Trans, bool UnitDiagonal, const Epetra_MultiVector& X, 
            Epetra_MultiVector& Y) const
  {
    IFPACK_RETURN(-1); // not implemented 
  }

  virtual int Apply(const Epetra_MultiVector& X,
            Epetra_MultiVector& Y) const;

  virtual int ApplyInverse(const Epetra_MultiVector& X,
               Epetra_MultiVector& Y) const;
  virtual int InvRowSums(Epetra_Vector& x) const
  {
    IFPACK_RETURN(-1); // not implemented
  }

  virtual int LeftScale(const Epetra_Vector& x)
  {
    IFPACK_RETURN(-1); // not implemented
  }

  virtual int InvColSums(Epetra_Vector& x) const
  {
    IFPACK_RETURN(-1); // not implemented
  }


  virtual int RightScale(const Epetra_Vector& x) 
  {
    IFPACK_RETURN(-1); // not implemented
  }



  virtual bool Filled() const
  {
    return true;
  }

  /* Returns the quantity \f$ \| A \|_\infty\f$ such that
     \f[\| A \|_\infty = \max_{1\lei\len} \sum_{i=1}^m |a_{ij}| \f].
     */ 
  virtual double NormInf() const
  {
    return(-1.0);
  }

  /* Returns the quantity \f$ \| A \|_1\f$ such that
     \f[\| A \|_1= \max_{1\lej\len} \sum_{j=1}^n |a_{ij}| \f].
     */ 
  virtual double NormOne() const
  {
    IFPACK_RETURN(-1.0);
  }

  virtual int NumGlobalNonzeros() const
  {
    return(NumNonzeros_);
  }

  virtual int NumGlobalRows() const
  {
    return(NumRows_);
  }

  virtual int NumGlobalCols() const
  {
    return(NumRows_);
  }

  virtual int NumGlobalDiagonals() const
  {
    return(NumRows_);
  }

  virtual int NumMyNonzeros() const
  {
    return(NumNonzeros_);
  }

  virtual int NumMyRows() const
  {
    return(NumRows_);
  }

  virtual int NumMyCols() const
  {
    return(NumRows_);
  }

  virtual int NumMyDiagonals() const
  {
    return(NumRows_);
  }

  virtual bool LowerTriangular() const
  {
    return(Matrix_->LowerTriangular());
  }

  virtual bool UpperTriangular() const
  {
    return(Matrix_->UpperTriangular());
  }

  virtual const Epetra_Map & RowMatrixRowMap() const
  {
    return(*Map_);
  }

  virtual const Epetra_Map & RowMatrixColMap() const
  {
    return(*Map_);
  }

  virtual const Epetra_Import * RowMatrixImporter() const
  {
    return(0);
  }

  // following functions are required to derive Epetra_RowMatrix objects.

  int SetOwnership(bool ownership)
  {
    IFPACK_RETURN(-1);
  }

  int SetUseTranspose(bool UseTranspose_in)
  {
    UseTranspose_ = UseTranspose_in;
    return(0);
  }

  bool UseTranspose() const 
  {
    return(UseTranspose_);
  }

  bool HasNormInf() const
  {
    return(false);
  }

  const Epetra_Comm & Comm() const
  {
    return(*SerialComm_);
  }

  const Epetra_Map & OperatorDomainMap() const 
  {
    return(*Map_);
  }

  const Epetra_Map & OperatorRangeMap() const 
  {
    return(*Map_);
  }

const Epetra_BlockMap& Map() const;

const char* Label() const{
  return(Label_);
};

private:

  Teuchos::RefCountPtr<const Epetra_RowMatrix> Matrix_;
#ifdef HAVE_MPI

  Teuchos::RefCountPtr<Epetra_MpiComm> SerialComm_;
#else

  Teuchos::RefCountPtr<Epetra_SerialComm> SerialComm_;
#endif

  Teuchos::RefCountPtr<Epetra_Map> Map_;
  int NumRows_;
  int NumNonzeros_;
  int MaxNumEntries_;
  int MaxNumEntriesA_;
  std::vector<int> NumEntries_;
  mutable std::vector<int> Indices_;
  mutable std::vector<double> Values_;
  bool UseTranspose_;
  char Label_[80];
  Teuchos::RefCountPtr<Epetra_Vector> Diagonal_;
  double NormOne_;
  double NormInf_;

};

#endif /* IFPACK_LOCALFILTER_H */