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// Thyra: Interfaces and Support for Abstract Numerical Algorithms
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#ifndef THYRA_LINEAR_OP_TRANSFORMER_BASE_HPP
#define THYRA_LINEAR_OP_TRANSFORMER_BASE_HPP
#include "Thyra_LinearOpBase.hpp"
#include "Teuchos_VerboseObject.hpp"
namespace Thyra {
/** \brief Base interface for transforming a LinearOpBase object. */
template<class Scalar>
class LinearOpTransformerBase
: virtual public Teuchos::Describable,
virtual public Teuchos::VerboseObject<LinearOpTransformerBase<Scalar> >
{
public:
/** \brief Create an uninitialized op. */
virtual bool isCompatible(const LinearOpBase<Scalar> &op_in) const = 0;
/** \brief Create an uninitialized op. */
virtual RCP<LinearOpBase<Scalar> > createOutputOp() const = 0;
/** \brief Do the transformation to a pre-created output LinearOpBase object.
*
* \param op_in [in] The linear operator source that will be transformed in
* some way. Precondition: <tt>this->isCompataible(op_in) == true</tt>.
*
* \param op_inout [in/out] The transformed linear operator. This object
* must have been created by <tt>this->createOutputOp()</tt> and may have
* already been passed through this function before. This allows for resuse
* of internal structures on re-transformations. Postcondition: On output,
* the object <tt>op_inout</tt> will be some appropriate transformation of
* <tt>op_in</tt>. The exact nature of the transformation is not specified
* in this interface.
*/
virtual void transform(
const LinearOpBase<Scalar> &op_in,
const Ptr<LinearOpBase<Scalar> > &op_inout
) const = 0;
};
} // namespace Thyra
#endif // THYRA_LINEAR_OP_TRANSFORMER_BASE_HPP
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