Teko_LU2x2Strategy.hpp

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//      Teko: A package for block and physics based preconditioning
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#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