/usr/include/trilinos/Thyra_DefaultIdentityLinearOp_decl.hpp is in libtrilinos-thyra-dev 12.4.2-2.
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// ***********************************************************************
//
// Thyra: Interfaces and Support for Abstract Numerical Algorithms
// Copyright (2004) Sandia Corporation
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// @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 {
/** \brief Represents a identity linear operator <tt>M = I</tt>.
*
* This class implements:
\verbatim
y = alpha*op(M)*x + beta*y
=>
y = alpha*x + beta*y
\endverbatim
* \ingroup Thyra_Op_Vec_ANA_Development_grp
*/
template<class Scalar>
class DefaultIdentityLinearOp : virtual public IdentityLinearOpBase<Scalar>
{
public:
/** @name Constructors/initializers/accessors */
//@{
/** \brief Constructs to uninitialized.
*
* <b>Postconditions:</b><ul>
* <li><tt>this->range().get()==NULL</tt>
* </ul>
*/
DefaultIdentityLinearOp();
/** Calls <tt>initialize()</tt>.
*/
DefaultIdentityLinearOp(const RCP<const VectorSpaceBase<Scalar> > &space);
/** \brief Initialize given a list of non-const linear operators.
*
* \param range [in] Range vector space.
*
* \param range [in] Domain vector space.
*
* <b>Preconditions:</b><ul>
* <li><tt>range.get()!=NULL</tt>
* <li><tt>domain.get()!=NULL</tt>
* </ul>
*
* <b>Postconditions:</b><ul>
* <li><tt>this->range().get()==range.get()</tt>
* <li><tt>this->domain().get()==domain.get()</tt>
* </ul>
*/
void initialize(const RCP<const VectorSpaceBase<Scalar> > &space);
/** \brief Set to uninitialized.
*
* <b>Postconditions:</b><ul>
* <li><tt>this->range().get()==NULL</tt>
* </ul>
*/
void uninitialize();
//@}
/** @name Overridden from LinearOpBase */
//@{
/** \brief Returns <tt>Teuchos::null</tt> if uninitialized. */
RCP< const VectorSpaceBase<Scalar> > range() const;
/** \brief Returns <tt>Teuchos::null</tt> if uninitialized. */
RCP< const VectorSpaceBase<Scalar> > domain() const;
/** \brief . */
RCP<const LinearOpBase<Scalar> > clone() const;
//@}
/** @name Overridden from Teuchos::Describable */
//@{
/** \brief Prints just the name <tt>DefaultIdentityLinearOp</tt> along with the
* overall dimensions.
*/
std::string description() const;
//@}
protected:
/** @name Overridden from LinearOpBase */
//@{
/** \brief Returns <tt>true</tt> . */
bool opSupportedImpl(EOpTransp M_trans) const;
/** \brief . */
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&);
};
/** \brief Create an identity linear operator with given a vector space.
*
* \relates 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
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