MueLu_InverseApproximationFactory_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_INVERSEAPPROXIMATIONFACTORY_DECL_HPP_
#define MUELU_INVERSEAPPROXIMATIONFACTORY_DECL_HPP_

#include "MueLu_ConfigDefs.hpp"

#include <Teuchos_ParameterList.hpp>

#include <Xpetra_CrsMatrix_fwd.hpp>
#include <Xpetra_Map_fwd.hpp>

#include "MueLu_FactoryBase_fwd.hpp"
#include "MueLu_SingleLevelFactoryBase.hpp"
#include "MueLu_Utilities_fwd.hpp"

namespace MueLu {

template <class Scalar        = DefaultScalar,
          class LocalOrdinal  = DefaultLocalOrdinal,
          class GlobalOrdinal = DefaultGlobalOrdinal,
          class Node          = DefaultNode>
class InverseApproximationFactory : public SingleLevelFactoryBase {
#undef MUELU_INVERSEAPPROXIMATIONFACTORY_SHORT
#include "MueLu_UseShortNames.hpp"

 public:


  InverseApproximationFactory() = default;



  void DeclareInput(Level& currentLevel) const;

  RCP<const ParameterList> GetValidParameterList() const;



  void Build(Level& currentLevel) const;


 private:
  RCP<Matrix> GetSparseInverse(const RCP<Matrix>& A, const RCP<const CrsGraph>& sparsityPattern) const;

};  // class InverseApproximationFactory

}  // namespace MueLu

#define MUELU_INVERSEAPPROXIMATIONFACTORY_SHORT
#endif /* MUELU_INVERSEAPPROXIMATIONFACTORY_DECL_HPP_ */