Teko_MultPreconditionerFactory.hpp

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

#include "Teko_BlockPreconditionerFactory.hpp"
#include "Teko_Utilities.hpp"
#include "Teko_BlockImplicitLinearOp.hpp"

namespace Teko {

class MultPrecondState : public Teko::BlockPreconditionerState {
public:
   MultPrecondState() {}

   Teuchos::RCP<BlockPreconditionerState> StateOne_;
   Teuchos::RCP<BlockPreconditionerState> StateTwo_;
};

class MultPrecsLinearOp : public Teko::BlockImplicitLinearOp {
public:

   MultPrecsLinearOp(const Teko::LinearOp &A, const Teko::LinearOp &M1, 
            const Teko::LinearOp &M2): A_(A), M1_(M1), M2_(M2) { }

   virtual Teko::VectorSpace  range() const { return M1_->range(); }
   virtual Teko::VectorSpace domain() const { return M1_->domain();}
   virtual void implicitApply(const Teko::BlockedMultiVector & r, Teko::BlockedMultiVector & y,
             const double alpha = 1.0, const double beta = 0.0) const;

protected:
   using Teko::BlockImplicitLinearOp::implicitApply;

   Teko::LinearOp A_, M1_, M2_;

private:
   // hide me!
   MultPrecsLinearOp();
   MultPrecsLinearOp(const MultPrecsLinearOp &);
};

class MultPreconditionerFactory
   : public Teko::BlockPreconditionerFactory {
public:
   MultPreconditionerFactory(const Teuchos::RCP<const Teko::BlockPreconditionerFactory> & FirstFactory,
                             const Teuchos::RCP<const Teko::BlockPreconditionerFactory> & SecondFactory);

   MultPreconditionerFactory();

   Teko::LinearOp buildPreconditionerOperator(Teko::BlockedLinearOp & blo,
                                            Teko::BlockPreconditionerState & state) const;
    
   virtual Teuchos::RCP<Teko::PreconditionerState> buildPreconditionerState() const;

protected:
   using Teko::BlockPreconditionerFactory::buildPreconditionerOperator;

   // class members
   Teuchos::RCP<const Teko::BlockPreconditionerFactory> FirstFactory_;
   Teuchos::RCP<const Teko::BlockPreconditionerFactory> SecondFactory_;
   
   virtual void initializeFromParameterList(const Teuchos::ParameterList & pl);
};

} // end namespace Teko

#endif