MueLu_InitialBlockNumberFactory_def.hpp

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#ifndef MUELU_INITIALBLOCKNUMBER_FACTORY_DEF_HPP
#define MUELU_INITIALBLOCKNUMBER_FACTORY_DEF_HPP
 
#include "Xpetra_VectorFactory.hpp"
#include "Xpetra_Map.hpp"
#include "Xpetra_Matrix.hpp"
#include "Xpetra_IO.hpp"
 
#include "MueLu_InitialBlockNumberFactory_decl.hpp"
 
#include "MueLu_MasterList.hpp"
#include "MueLu_Level.hpp"
#include "MueLu_Monitor.hpp"
 
namespace MueLu {
 
  template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
  RCP<const ParameterList> InitialBlockNumberFactory<Scalar,LocalOrdinal, GlobalOrdinal, Node>::GetValidParameterList() const {
    RCP<ParameterList> validParamList = rcp(new ParameterList());
#define SET_VALID_ENTRY(name) validParamList->setEntry(name, MasterList::getEntry(name))
    SET_VALID_ENTRY("aggregation: block diagonal: interleaved blocksize");
#undef  SET_VALID_ENTRY
 
    validParamList->set< RCP<const FactoryBase> >("A",                  Teuchos::null, "Generating factory of the matrix A");
 
    return validParamList;
  }
 
  template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
  void InitialBlockNumberFactory<Scalar,LocalOrdinal, GlobalOrdinal, Node>::DeclareInput(Level& currentLevel) const {
    Input(currentLevel, "A");
  }
 
  template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
  void InitialBlockNumberFactory<Scalar,LocalOrdinal, GlobalOrdinal, Node>::Build(Level & currentLevel) const {
    FactoryMonitor m(*this, "Build", currentLevel);
    const ParameterList  & pL = GetParameterList();
 
    RCP<Matrix> A = Get< RCP<Matrix> >(currentLevel, "A");
    LO blocksize = as<LO>(pL.get<int>("aggregation: block diagonal: interleaved blocksize"));
 
    GetOStream(Statistics1) << "Generating interleaved blocking with "<<blocksize<<" equations"<<std::endl;
    RCP<LocalOrdinalVector> BlockNumber = LocalOrdinalVectorFactory::Build(A->getRowMap(),false);
    Teuchos::ArrayRCP<LO> bn_data = BlockNumber->getDataNonConst(0);
    for(LO i=0; i<(LO)A->getRowMap()->getLocalNumElements();i++)
      bn_data[i] = i % blocksize;
    
    Set(currentLevel,"BlockNumber",BlockNumber);
  }
 
} // namespace MueLu
 
#endif // MUELU_INITIALBLOCKNUMBER_FACTORY_DEF_HPP