Thyra_DefaultZeroLinearOpDecl.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
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#ifndef THYRA_DEFAULT_ZERO_LINEAR_OP_DECL_HPP
#define THYRA_DEFAULT_ZERO_LINEAR_OP_DECL_HPP

#include "Thyra_ZeroLinearOpBase.hpp"
#include "Thyra_SingleScalarLinearOpBase.hpp"
#include "Teuchos_ConstNonconstObjectContainer.hpp"
#include "Teuchos_arrayArg.hpp"

namespace Thyra {

template<class Scalar>
class DefaultZeroLinearOp
  : virtual public ZeroLinearOpBase<Scalar>              // Public interface
  , virtual protected SingleScalarLinearOpBase<Scalar>   // Implementation detail
{
public:

  using SingleScalarLinearOpBase<Scalar>::apply;


  DefaultZeroLinearOp();

  DefaultZeroLinearOp(
    const Teuchos::RCP<const VectorSpaceBase<Scalar> >   &range
    ,const Teuchos::RCP<const VectorSpaceBase<Scalar> >  &domain
    );

  void initialize(
    const Teuchos::RCP<const VectorSpaceBase<Scalar> >   &range
    ,const Teuchos::RCP<const VectorSpaceBase<Scalar> >  &domain
    );

  void uninitialize();


  
  Teuchos::RCP< const VectorSpaceBase<Scalar> > range() const;
  
  Teuchos::RCP< const VectorSpaceBase<Scalar> > domain() const;
  
  Teuchos::RCP<const LinearOpBase<Scalar> > clone() const;
  
  
                                                
  std::string description() const;


protected:


  bool opSupported(ETransp M_trans) const;

  void apply(
    const ETransp                     M_trans
    ,const MultiVectorBase<Scalar>    &X
    ,MultiVectorBase<Scalar>          *Y
    ,const Scalar                     alpha
    ,const Scalar                     beta
    ) const;


private:

  Teuchos::RCP<const VectorSpaceBase<Scalar> >  range_;
  Teuchos::RCP<const VectorSpaceBase<Scalar> >  domain_;

  // Not defined and not to be called
  DefaultZeroLinearOp(const DefaultZeroLinearOp&);
  DefaultZeroLinearOp& operator=(const DefaultZeroLinearOp&);

};

template<class Scalar>
Teuchos::RCP<const LinearOpBase<Scalar> >
zero(
  const Teuchos::RCP<const VectorSpaceBase<Scalar> >   &range
  ,const Teuchos::RCP<const VectorSpaceBase<Scalar> >  &domain
  );

} // end namespace Thyra

#endif  // THYRA_DEFAULT_ZERO_LINEAR_OP_DECL_HPP

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