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//
// Thyra: Interfaces and Support for Abstract Numerical Algorithms
// Copyright (2004) Sandia Corporation
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#ifndef THYRA_VECTOR_SPACE_CONVERTED_BASE_HPP
#define THYRA_VECTOR_SPACE_CONVERTED_BASE_HPP
#include "Thyra_OperatorVectorTypes.hpp"
namespace Thyra {
/** \brief Base interface for a factory that converts vector space types and
* vectors and multi-vectors from one scalar type to another.
*
* This abstract interface is templated on two scalar types,
* <tt>ScalarFrom</tt> and <tt>ScalarTo</tt>, which allow a client to create
* new vector spaces and convert vectors and multi-vectors from one scalar
* type to another. This is a critical capability for some algorithms with
* mixed scalar types.
*
* One of these concrete subclasses should be provided for every concrete
* <tt>VectorSpaceBase</tt> subclass.
*
* Note that this interface works just fine even if <tt>ScalarTo</tt> is the
* same type as <tt>ScalarFrom</tt>.
*
* ToDo: Finish documentation!
*
* \ingroup Thyra_Op_Vec_extended_interfaces_code_grp
*/
template<class ScalarFrom, class ScalarTo>
class VectorSpaceConverterBase {
public:
/** \brief . */
virtual ~VectorSpaceConverterBase() {}
/** \brief Create a new vector space with scalar type <tt>ScalarTo</tt>
* given an existing vector space with scalar type <tt>ScalarFrom</tt>.
*/
virtual Teuchos::RCP<const VectorSpaceBase<ScalarTo> >
createVectorSpaceTo(
const VectorSpaceBase<ScalarFrom> &vecSpc
) const = 0;
/** \brief Create a new vector space with scalar type <tt>ScalarFrom</tt>
* given an existing vector space with scalar type <tt>ScalarTo</tt>.
*/
virtual Teuchos::RCP<const VectorSpaceBase<ScalarFrom> >
createVectorSpaceFrom(
const VectorSpaceBase<ScalarTo> &vecSpc
) const = 0;
/** \brief Copy from a multi-vector (or vector) with one scalar type to
* another multi-vector (or vector) with another scalar type.
*/
virtual void convert(
const MultiVectorBase<ScalarFrom> &mv_from
,MultiVectorBase<ScalarTo> *mv_to
) const = 0;
};
} // namespace Thyra
#endif // THYRA_VECTOR_SPACE_CONVERTED_BASE_HPP
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