Teko_LU2x2Strategy.hpp

/*
// @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_LU2x2Strategy_hpp__
#define __Teko_LU2x2Strategy_hpp__
 
#include "Teuchos_RCP.hpp"
#include "Thyra_LinearOpBase.hpp"
 
#include "Teko_Utilities.hpp"
#include "Teko_InverseFactory.hpp"
#include "Teko_BlockPreconditionerFactory.hpp"
 
 
namespace Teko {

class LU2x2Strategy {
public:
   virtual ~LU2x2Strategy() {}

   virtual const Teko::LinearOp
   getHatInvA00(const Teko::BlockedLinearOp & A,BlockPreconditionerState & state) const = 0;

   virtual const Teko::LinearOp
   getTildeInvA00(const Teko::BlockedLinearOp & A,BlockPreconditionerState & state) const = 0;

   virtual const Teko::LinearOp
   getInvS(const Teko::BlockedLinearOp & A,BlockPreconditionerState & state) const = 0;

   virtual void initializeFromParameterList(const Teuchos::ParameterList & /* settings */,
                                            const InverseLibrary & /* invLib */)
   { }

   virtual Teuchos::RCP<Teuchos::ParameterList> getRequestedParameters() const
   { return Teuchos::null; }

   virtual bool updateRequestedParameters(const Teuchos::ParameterList & /* pl */)
   { return true; }

   void setRequestHandler(const Teuchos::RCP<RequestHandler> & rh)
   { requestHandler_ = rh; }

   Teuchos::RCP<RequestHandler> getRequestHandler() const
   { return requestHandler_; }
 
private:
   Teuchos::RCP<RequestHandler> requestHandler_;
 
};

class StaticLU2x2Strategy : public LU2x2Strategy {
public:
   StaticLU2x2Strategy(const Teko::LinearOp & hInvA00,
                       const Teko::LinearOp & tInvA00,
                       const Teko::LinearOp & invS)
      : hatInvA00_(hInvA00), tildeInvA00_(tInvA00), invS_(invS)
   {}
 
   virtual ~StaticLU2x2Strategy() {}
 

   virtual const Teko::LinearOp
   getHatInvA00(const Teko::BlockedLinearOp & /* A */,BlockPreconditionerState & /* state */) const
   { return hatInvA00_; }

   virtual const Teko::LinearOp
   getTildeInvA00(const Teko::BlockedLinearOp & /* A */,BlockPreconditionerState & /* state */) const
   { return tildeInvA00_; }

   virtual const Teko::LinearOp
   getInvS(const Teko::BlockedLinearOp & /* A */,BlockPreconditionerState & /* state */) const
   { return invS_; }

 
protected:
   const Teko::LinearOp hatInvA00_;  
   const Teko::LinearOp tildeInvA00_;  
   const Teko::LinearOp invS_; 
 
private:
   // hide me!
   StaticLU2x2Strategy() {}
};
 
} // end namespace Teko
 
#endif