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/*
// @HEADER
// 
// ***********************************************************************
// 
//      Teko: A package for block and physics based preconditioning
//                  Copyright 2010 Sandia Corporation 
//  
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//  
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//  
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//  
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//  
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission. 
//  
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//  
// Questions? Contact Eric C. Cyr (eccyr@sandia.gov)
// 
// ***********************************************************************
// 
// @HEADER

*/

#ifndef __Teko_SolveInverseFactory_hpp__
#define __Teko_SolveInverseFactory_hpp__

#include "Teko_InverseFactory.hpp"

namespace Teko {

class SolveInverseFactory : public InverseFactory {
public:
   //! \name Constructors
   //@{ 
   
   /** \brief Constructor that takes a Thyra solve factory and 
     *        makes it look like an InverseFactory
     *
     * Constructor that takes a Thyra solve factory and 
     * makes it look like an InverseFactory.
     * 
     * \param[in] lowsFactory Thyra LineaerOpWithSolveFactoryBase used for building 
     *                        the inverse.
     */
   SolveInverseFactory(const Teuchos::RCP<Thyra::LinearOpWithSolveFactoryBase<double> > & lowsFactory);

   //! Copy constructor
   SolveInverseFactory(const SolveInverseFactory & siFactory);
   //@}

   virtual ~SolveInverseFactory() {}

   /** \brief Build an inverse operator
     *
     * Build the inverse operator using this factory.
     *
     * \param[in] linearOp Linear operator needing to be inverted.
     *
     * \returns New linear operator that functions as the inverse
     *          of <code>linearOp</code>.
     */
   virtual InverseLinearOp buildInverse(const LinearOp & linearOp) const;

   /** \brief Build a preconditioned inverse operator
     * 
     * Build the inverse operator using this factory and a user specified
     * preconditioning operator. The default behavior is to call buildInverse
     * ignoring the preconditioner. 
     *
     * \param[in] linearOp Linear operator needing to be inverted.
     * \param[in] precOp Preconditioning operator
     *
     * \returns New linear operator that functions as the inverse
     *          of <code>linearOp</code>.
     */
   virtual InverseLinearOp buildInverse(const LinearOp & linearOp,const LinearOp & precOp) const;

   /** \brief Pass in an already constructed inverse operator. Update
     *        the inverse operator based on the new source operator.
     *
     * Pass in an already constructed inverse operator. Update
     * the inverse operator based on the new source operator.
     *
     * \param[in]     source Source operator to be inverted.
     * \param[in,out] dest   Pre constructed inverse operator to be
     *                        rebuilt using the <code>source</code>
     *                        object.
     */
   virtual void rebuildInverse(const LinearOp & source,InverseLinearOp & dest) const;

   /** \brief Pass in an already constructed inverse operator. Update
     *        the inverse operator based on the new source operator.
     *
     * Pass in an already constructed inverse operator. Update
     * the inverse operator based on the new source operator.
     *
     * \param[in]     source Source operator to be inverted.
     * \param[in]     precOp Preconditioning operator
     * \param[in,out] dest   Pre constructed inverse operator to be
     *                        rebuilt using the <code>source</code>
     *                        object.
     */
   virtual void rebuildInverse(const LinearOp & source,const LinearOp & precOp,InverseLinearOp & dest) const;

   /** \brief A function that permits inspection of the parameters used to create
     *        this object.
     *
     * A function that permits inspection of the parameters used to create this
     * object. Useful for determining defaults and settings used.
     *
     * \returns A list used to parameterize this object.
     */
   virtual Teuchos::RCP<const Teuchos::ParameterList> getParameterList() const;

   //! Accessor primarily for testing purposes
   Teuchos::RCP<const Thyra::LinearOpWithSolveFactoryBase<double> > getLowsFactory() const
   { return lowsFactory_; }


   /** Return a string that describes this factory */
   virtual std::string toString() const { return lowsFactory_->description(); }

protected:
   Teuchos::RCP<Thyra::LinearOpWithSolveFactoryBase<double> > lowsFactory_;

private:
   // hide me!
   SolveInverseFactory();
};

} // end namespace Teko

#endif