Teko_DiagonalPreconditionerOp.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_DiagonalPreconditionerOp_hpp__
#define __Teko_DiagonalPreconditionerOp_hpp__
#include "Teko_Utilities.hpp"

#include "Teko_ImplicitLinearOp.hpp"

class EpetraExt_PointToBlockDiagPermute; 

namespace Teko {

class DiagonalPreconditionerOp :public ImplicitLinearOp  {
public:

  DiagonalPreconditionerOp(Teuchos::RCP<EpetraExt_PointToBlockDiagPermute> BDP, const VectorSpace range, const VectorSpace domain);

  virtual VectorSpace range() const {return range_;}
  
  virtual VectorSpace domain() const {return domain_;}

   virtual void implicitApply(const MultiVector & x, MultiVector & y,
              const double alpha = 1.0, const double beta = 0.0) const;
  
   virtual void describe(Teuchos::FancyOStream &out_arg,
                         const Teuchos::EVerbosityLevel verbLevel) const;
  
   EpetraExt_PointToBlockDiagPermute* get_BDP() const {return &*BDP_;} 
  
private:

  virtual bool opSupportedImpl(const Thyra::EOpTransp M_trans) const;
  
  virtual void applyImpl(
    const Thyra::EOpTransp M_trans,
    const Thyra::MultiVectorBase<double> & x,
    const Teuchos::Ptr<Thyra::MultiVectorBase<double> > & y,
    const double alpha,
    const double beta
    ) const;

  

  Teuchos::RCP<EpetraExt_PointToBlockDiagPermute> BDP_;
  const VectorSpace range_, domain_;
};

} // end namespace Teko

#endif