Thyra_DefaultIdentityLinearOp_decl.hpp

// @HEADER
// *****************************************************************************
//    Thyra: Interfaces and Support for Abstract Numerical Algorithms
//
// Copyright 2004 NTESS and the Thyra contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef THYRA_DEFAULT_IDENTITY_LINEAR_OP_DECL_HPP
#define THYRA_DEFAULT_IDENTITY_LINEAR_OP_DECL_HPP

#include "Thyra_IdentityLinearOpBase.hpp"
#include "Teuchos_ConstNonconstObjectContainer.hpp"

namespace Thyra {

template<class Scalar>
class DefaultIdentityLinearOp : virtual public IdentityLinearOpBase<Scalar>
{
public:


  DefaultIdentityLinearOp();

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

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

  void uninitialize();


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


protected:


  bool opSupportedImpl(EOpTransp M_trans) const;

  void applyImpl(
    const EOpTransp M_trans,
    const MultiVectorBase<Scalar> &X,
    const Ptr<MultiVectorBase<Scalar> > &Y,
    const Scalar alpha,
    const Scalar beta
    ) const;


private:

  RCP<const VectorSpaceBase<Scalar> >  space_;

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

};


template<class Scalar>
RCP<const LinearOpBase<Scalar> >
identity(
  const RCP<const VectorSpaceBase<Scalar> > &space,
  const std::string &label = ""
  );


} // end namespace Thyra


#endif  // THYRA_DEFAULT_IDENTITY_LINEAR_OP_DECL_HPP