MueLu_AmalgamationFactory_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_AMALGAMATIONFACTORY_DECL_HPP
#define MUELU_AMALGAMATIONFACTORY_DECL_HPP
 
#include <Xpetra_Matrix_fwd.hpp>
#include <Xpetra_Map_fwd.hpp>
 
#include "MueLu_ConfigDefs.hpp"
#include "MueLu_SingleLevelFactoryBase.hpp"
#include "MueLu_AmalgamationInfo_fwd.hpp"
 
#include "MueLu_Level_fwd.hpp"
#include "MueLu_Exceptions.hpp"
 
namespace MueLu {

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


  AmalgamationFactory();

  virtual ~AmalgamationFactory();
 
  RCP<const ParameterList> GetValidParameterList() const override;



 
  void DeclareInput(Level& currentLevel) const override;

 
  void Build(Level& currentLevel) const override;

  static const GlobalOrdinal DOFGid2NodeId(GlobalOrdinal gid, LocalOrdinal blockSize, const GlobalOrdinal offset /*= 0*/,
                                           const GlobalOrdinal indexBase /* = 0*/);

  static const GlobalOrdinal DOFGidOffset(RCP<const StridedMap> stridedMap);

  static void AmalgamateMap(const Map& sourceMap, const Matrix& A, RCP<const Map>& amalgamatedMap, Array<LO>& translation);

  static void AmalgamateMap(RCP<const StridedMap> sourceMap, RCP<const Map>& amalgamatedMap);
 
};  // class AmalgamationFactory
 
}  // namespace MueLu
 
#define MUELU_AMALGAMATIONFACTORY_SHORT
#endif  // MUELU_AMALGAMATIONFACTORY_DECL_HPP