MueLu_SmooVecCoalesceDropFactory_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_SMOOVECCOALESCEDROPFACTORY_DECL_HPP
#define MUELU_SMOOVECCOALESCEDROPFACTORY_DECL_HPP

#include <Xpetra_Matrix_fwd.hpp>
#include <Xpetra_MultiVector_fwd.hpp>
#include <Xpetra_VectorFactory_fwd.hpp>
#include <Xpetra_Vector_fwd.hpp>
#include <Xpetra_MapFactory_fwd.hpp>
#include <Xpetra_Map_fwd.hpp>

#include "MueLu_ConfigDefs.hpp"
#include "MueLu_SingleLevelFactoryBase.hpp"
#include "MueLu_SmooVecCoalesceDropFactory_fwd.hpp"

#include "MueLu_Level_fwd.hpp"
#include "MueLu_LWGraph.hpp"

#include "MueLu_LWGraph_fwd.hpp"
#include "MueLu_PreDropFunctionBaseClass_fwd.hpp"

namespace MueLu {

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

 public:


  SmooVecCoalesceDropFactory();

  virtual ~SmooVecCoalesceDropFactory() {}

  RCP<const ParameterList> GetValidParameterList() const;




  void DeclareInput(Level& currentLevel) const;

  void SetPreDropFunction(const RCP<MueLu::PreDropFunctionBaseClass<Scalar, LocalOrdinal, GlobalOrdinal, Node> >& predrop) { predrop_ = predrop; }


  void Build(Level& currentLevel) const;  // Build

 private:
  // pre-drop function
  mutable RCP<PreDropFunctionBaseClass> predrop_;

  void badGuysCoalesceDrop(const Matrix& Amat, Teuchos::ArrayRCP<Scalar>& dropParams, LO nPDEs, const MultiVector& smoothedTVecs, const MultiVector& smoothedNull, RCP<LWGraph>& filteredGraph) const;
  void badGuysDropfunc(LO row, const Teuchos::ArrayView<const LocalOrdinal>& indices, const Teuchos::ArrayView<const Scalar>& vals, const MultiVector& smoothedTVecs, LO nPDEs, Teuchos::ArrayRCP<Scalar>& penalties, const MultiVector& smoothedNull, Teuchos::ArrayRCP<LO>& Bcols, Teuchos::ArrayRCP<bool>& keepOrNot, LO& Nbcols, LO nLoc) const;

};  // class SmooVecCoalesceDropFactory

}  // namespace MueLu

#define MUELU_SMOOVECCOALESCEDROPFACTORY_SHORT
#endif  // MUELU_SMOOVECCOALESCEDROPFACTORY_DECL_HPP