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Teko_DiagonalPreconditionerOp.hpp
00001 /*
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00006 //      Teko: A package for block and physics based preconditioning
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00045 */
00046 
00047 #ifndef __Teko_DiagonalPreconditionerOp_hpp__
00048 #define __Teko_DiagonalPreconditionerOp_hpp__
00049 #include "Teko_Utilities.hpp"
00050 
00051 #include "Teko_ImplicitLinearOp.hpp"
00052 
00053 class EpetraExt_PointToBlockDiagPermute; 
00054 
00055 namespace Teko {
00056 
00057 class DiagonalPreconditionerOp :public ImplicitLinearOp  {
00058 public:
00059 
00061   DiagonalPreconditionerOp(Teuchos::RCP<EpetraExt_PointToBlockDiagPermute> BDP, const VectorSpace range, const VectorSpace domain);
00062 
00064   virtual VectorSpace range() const {return range_;}
00065   
00067   virtual VectorSpace domain() const {return domain_;}
00068 
00081    virtual void implicitApply(const MultiVector & x, MultiVector & y,
00082               const double alpha = 1.0, const double beta = 0.0) const;
00083   
00084    virtual void describe(Teuchos::FancyOStream &out_arg,
00085                          const Teuchos::EVerbosityLevel verbLevel) const;
00086   
00087    Teuchos::RCP<EpetraExt_PointToBlockDiagPermute> get_BDP() const {return BDP_;} 
00088   
00089 private:
00090 
00091    Teuchos::RCP<EpetraExt_PointToBlockDiagPermute> BDP_;
00092    const VectorSpace range_, domain_;
00093 };
00094 
00095 } // end namespace Teko
00096 
00097 #endif
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