Thyra_DefaultDiagonalLinearOpDecl.hpp

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// ***********************************************************************
// 
//    Thyra: Interfaces and Support for Abstract Numerical Algorithms
//                 Copyright (2004) 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.
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// 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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//  
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#ifndef THYRA_DIAGONAL_LINEAR_OP_DECL_HPP
#define THYRA_DIAGONAL_LINEAR_OP_DECL_HPP

#include "Thyra_DiagonalLinearOpBase.hpp"
#include "Thyra_SingleRhsLinearOpBaseDecl.hpp"
#include "Teuchos_ConstNonconstObjectContainer.hpp"

namespace Thyra {

template<class Scalar>
class DefaultDiagonalLinearOp
  : virtual public DiagonalLinearOpBase<Scalar>       // Public interface
  , virtual protected SingleRhsLinearOpBase<Scalar>   // Implementation detail
{
public:


  DefaultDiagonalLinearOp();

  DefaultDiagonalLinearOp(
    const RCP<const VectorSpaceBase<Scalar> >  &space
    );

  DefaultDiagonalLinearOp(
    const RCP<VectorBase<Scalar> >   &diag
    );

  DefaultDiagonalLinearOp(
    const RCP<const VectorBase<Scalar> >   &diag
    );

  void initialize(
    const RCP<const VectorSpaceBase<Scalar> >  &space
    );

  void initialize(const RCP<VectorBase<Scalar> > &diag);

  void initialize(
    const RCP<const VectorBase<Scalar> >   &diag
    );

  void uninitialize();



  bool isDiagConst() const;
  RCP<VectorBase<Scalar> > getNonconstDiag();
  RCP<const VectorBase<Scalar> > getDiag() const;


  RCP< const VectorSpaceBase<Scalar> > range() const;
  RCP< const VectorSpaceBase<Scalar> > domain() const;
  RCP<const LinearOpBase<Scalar> > clone() const;

protected:

  bool opSupported(EOpTransp M_trans) const;

  void apply(
    const EOpTransp                M_trans
    ,const VectorBase<Scalar>    &x
    ,VectorBase<Scalar>          *y
    ,const Scalar                alpha
    ,const Scalar                beta
    ) const;

private:

  Teuchos::ConstNonconstObjectContainer<VectorBase<Scalar> > diag_;

};


template<class Scalar>
RCP<const LinearOpBase<Scalar> >
diagonal(
  const RCP<VectorBase<Scalar> > &diag,
  const std::string &label = ""
  )
{
  RCP<LinearOpBase<Scalar> >
    dlo = Teuchos::rcp(new DefaultDiagonalLinearOp<Scalar>(diag));
  if (label.length())
    dlo->setObjectLabel(label);
  return dlo;
}


} // end namespace Thyra


#endif  // THYRA_DIAGONAL_LINEAR_OP_DECL_HPP

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