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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
// license for use of this work by or on behalf of the U.S. Government.
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
// @HEADER
#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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