Teko_DiagonalPreconditionerOp.hpp

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//      Teko: A package for block and physics based preconditioning
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#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;
  
   Teuchos::RCP<EpetraExt_PointToBlockDiagPermute> get_BDP() const {return BDP_;} 
  
private:

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

} // end namespace Teko

#endif