MueLu_UzawaSmoother_decl.hpp

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// @HEADER
// *****************************************************************************
//        MueLu: A package for multigrid based preconditioning
//
// Copyright 2012 NTESS and the MueLu contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER
 
#ifndef MUELU_UZAWASMOOTHER_DECL_HPP_
#define MUELU_UZAWASMOOTHER_DECL_HPP_
 
#include "MueLu_ConfigDefs.hpp"
 
#include <Teuchos_ParameterList.hpp>
 
// Xpetra
#include <Xpetra_MapExtractor_fwd.hpp>
#include <Xpetra_MultiVectorFactory_fwd.hpp>
#include <Xpetra_Matrix_fwd.hpp>
 
// MueLu
#include "MueLu_UzawaSmoother_fwd.hpp"
#include "MueLu_SmootherPrototype.hpp"
#include "MueLu_FactoryBase_fwd.hpp"
#include "MueLu_FactoryManagerBase_fwd.hpp"
#include "MueLu_SmootherBase_fwd.hpp"
 
#include "MueLu_SchurComplementFactory_fwd.hpp"
#include "MueLu_FactoryManager_fwd.hpp"
 
namespace MueLu {

 
template <class Scalar        = SmootherPrototype<>::scalar_type,
          class LocalOrdinal  = typename SmootherPrototype<Scalar>::local_ordinal_type,
          class GlobalOrdinal = typename SmootherPrototype<Scalar, LocalOrdinal>::global_ordinal_type,
          class Node          = typename SmootherPrototype<Scalar, LocalOrdinal, GlobalOrdinal>::node_type>
class UzawaSmoother : public SmootherPrototype<Scalar, LocalOrdinal, GlobalOrdinal, Node> {
  typedef Xpetra::MapExtractor<Scalar, LocalOrdinal, GlobalOrdinal, Node> MapExtractorClass;
 
#undef MUELU_UZAWASMOOTHER_SHORT
#include "MueLu_UseShortNames.hpp"
 
 public:

 
  RCP<const ParameterList> GetValidParameterList() const;
 
  void DeclareInput(Level &currentLevel) const;

  void SetVelocityPredictionFactoryManager(RCP<FactoryManager> FactManager);

  void SetSchurCompFactoryManager(RCP<FactoryManager> FactManager);

  void AddFactoryManager(RCP<const FactoryManagerBase> FactManager, int pos);




  void Setup(Level &currentLevel);

  void Apply(MultiVector &X, MultiVector const &B, bool InitialGuessIsZero = false) const;
 
  RCP<SmootherPrototype> Copy() const;



  std::string description() const;

  // using MueLu::Describable::describe; // overloading, not hiding
  void print(Teuchos::FancyOStream &out, const VerbLevel verbLevel = Default) const;

  size_t getNodeSmootherComplexity() const;

 
 private:
  std::string type_ = "Uzawa";
 
  RCP<const FactoryBase> AFact_;  

  RCP<Matrix> A_ = Teuchos::null;  //<! internal blocked operator "A" generated by AFact_
 
  RCP<const MapExtractorClass> rangeMapExtractor_;   
  RCP<const MapExtractorClass> domainMapExtractor_;  

  Teuchos::RCP<Vector> diagFinv_;  
  Teuchos::RCP<Matrix> F_;         
  Teuchos::RCP<Matrix> G_;         
  Teuchos::RCP<Matrix> D_;         
  Teuchos::RCP<Matrix> Z_;         
 
  Teuchos::RCP<SmootherBase> velPredictSmoo_;  
  Teuchos::RCP<SmootherBase> schurCompSmoo_;   

  std::vector<Teuchos::RCP<const FactoryManagerBase> > FactManager_;
 
};  // class UzawaSmoother
 
}  // namespace MueLu
 
#define MUELU_UZAWASMOOTHER_SHORT
 
#endif /* MUELU_UZAWASMOOTHER_DECL_HPP_ */