Teko_BlockInvDiagonalStrategy.hpp

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

#include <vector>

// Teuchos includes
#include "Teuchos_RCP.hpp"

// Thyra includes
#include "Thyra_LinearOpBase.hpp"

// Teko includes
#include "Teko_Utilities.hpp"
#include "Teko_InverseFactory.hpp"
#include "Teko_BlockPreconditionerFactory.hpp"

namespace Teko {

class BlockInvDiagonalStrategy {
public:
   virtual ~BlockInvDiagonalStrategy() {}

   virtual void getInvD(const BlockedLinearOp & A,BlockPreconditionerState & state,
                        std::vector<LinearOp> & invDiag) const = 0;

};

class StaticInvDiagStrategy : public BlockInvDiagonalStrategy {
public:
   StaticInvDiagStrategy(const LinearOp & invD0,
                          const LinearOp & invD1)
   { invDiag_.push_back(invD0); invDiag_.push_back(invD1); }

   StaticInvDiagStrategy(const std::vector<LinearOp> & invD)
      : invDiag_(invD)
   { }

   virtual ~StaticInvDiagStrategy() {}

   virtual void getInvD(const BlockedLinearOp & A, BlockPreconditionerState & state,
                        std::vector<LinearOp> & invDiag) const
   { invDiag.clear(); invDiag = invDiag_; }

protected:
   // stored inverse operators
   std::vector<Teuchos::RCP<const Thyra::LinearOpBase<double> > > invDiag_;
};

class InvFactoryDiagStrategy : public BlockInvDiagonalStrategy {
public:
   InvFactoryDiagStrategy(const Teuchos::RCP<InverseFactory> & factory);

   InvFactoryDiagStrategy(const std::vector<Teuchos::RCP<InverseFactory> > & factories,
                          const Teuchos::RCP<InverseFactory> & defaultFact=Teuchos::null);

   virtual ~InvFactoryDiagStrategy() {}

   virtual void getInvD(const BlockedLinearOp & A, BlockPreconditionerState & state,
                        std::vector<LinearOp> & invDiag) const;

protected:
   // stored inverse operators
   std::vector<Teuchos::RCP<InverseFactory> > invDiagFact_;
   Teuchos::RCP<InverseFactory> defaultInvFact_;

private:
   InvFactoryDiagStrategy();
   InvFactoryDiagStrategy(const InvFactoryDiagStrategy &);
};

} // end namespace Teko

#endif