MueLu_CoalesceDropFactory_decl.hpp

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#ifndef MUELU_COALESCEDROPFACTORY_DECL_HPP
#define MUELU_COALESCEDROPFACTORY_DECL_HPP
 
#include <Xpetra_Matrix_fwd.hpp>
#include <Xpetra_MultiVector_fwd.hpp>
#include <Xpetra_VectorFactory_fwd.hpp>
#include <Xpetra_Vector_fwd.hpp>
#include <Xpetra_ImportFactory_fwd.hpp>
#include <Xpetra_CrsGraph_fwd.hpp>
#include <Xpetra_CrsGraphFactory_fwd.hpp> //TODO
#include <Xpetra_StridedMap_fwd.hpp>
#include <Xpetra_Map_fwd.hpp>
 
#include "MueLu_ConfigDefs.hpp"
#include "MueLu_SingleLevelFactoryBase.hpp"
#include "MueLu_CoalesceDropFactory_fwd.hpp"
#include "MueLu_Utilities_fwd.hpp"
 
#include "MueLu_Level_fwd.hpp"
#include "MueLu_GraphBase.hpp"
#include "MueLu_Graph_fwd.hpp"
#include "MueLu_LWGraph_fwd.hpp"
#include "MueLu_AmalgamationInfo_fwd.hpp"
#include "MueLu_AmalgamationFactory_fwd.hpp"
#include "MueLu_PreDropFunctionBaseClass_fwd.hpp"
#include "MueLu_PreDropFunctionConstVal_fwd.hpp"
 
namespace MueLu {

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



    CoalesceDropFactory();

    virtual ~CoalesceDropFactory() { }
 
    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 MergeRows(const Matrix& A, const LO row, Array<LO>& cols, const Array<LO>& translation) const;
    void MergeRowsWithDropping(const Matrix& A, const LO row, const ArrayRCP<const SC>& ghostedDiagVals, SC threshold, Array<LO>& cols, const Array<LO>& translation) const;
 
 
    // When we want to decouple a block diagonal system (returns Teuchos::null if generate_matrix is false)
    Teuchos::RCP<Xpetra::Matrix<Scalar,LocalOrdinal,GlobalOrdinal,Node> > BlockDiagonalize(Level & currentLevel,const RCP<Matrix> & A, bool generate_matrix) const;
 
    // When we want to decouple a block diagonal system via a *graph*
    void BlockDiagonalizeGraph(const RCP<GraphBase> & inputGraph, const RCP<LocalOrdinalVector> & ghostedBlockNumber, RCP<GraphBase> & outputGraph, RCP<const Import> & importer) const;
 
  }; //class CoalesceDropFactory
 
} //namespace MueLu
 
#define MUELU_COALESCEDROPFACTORY_SHORT
#endif // MUELU_COALESCEDROPFACTORY_DECL_HPP