MueLu_BlockedCoarseMapFactory_def.hpp

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#ifndef MUELU_BLOCKEDCOARSEMAPFACTORY_DEF_HPP_
#define MUELU_BLOCKEDCOARSEMAPFACTORY_DEF_HPP_
 
#include <Xpetra_MultiVector.hpp>
#include <Xpetra_StridedMapFactory.hpp>
#include <Xpetra_Matrix.hpp>
 
#include "MueLu_BlockedCoarseMapFactory_decl.hpp"
#include "MueLu_Level.hpp"
#include "MueLu_Aggregates.hpp"
#include "MueLu_Monitor.hpp"
 
#include "MueLu_Factory.hpp"
 
namespace MueLu {
 
  template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
  RCP<const ParameterList> BlockedCoarseMapFactory<Scalar, LocalOrdinal, GlobalOrdinal, Node>::GetValidParameterList() const
  {
    RCP<ParameterList> validParamList = rcp(new ParameterList());
 
    validParamList->set< RCP<const FactoryBase> >("Aggregates", Teuchos::null, "Generating factory for aggregates.");
    validParamList->set< RCP<const FactoryBase> >("Nullspace", Teuchos::null, "Generating factory for null space.");
    validParamList->set< RCP<const FactoryBase> >("CoarseMap", Teuchos::null, "Generating factory of previous coarse map. (must be set by user!).");
 
    // do we need this?
    validParamList->set<std::string>("Striding info", "{}", "Striding information");
    validParamList->set<LocalOrdinal>("Strided block id", -1, "Strided block id");
 
    return validParamList;
  }
 
  template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
  void BlockedCoarseMapFactory<Scalar, LocalOrdinal, GlobalOrdinal, Node>::DeclareInput(Level &currentLevel) const
  {
    this->Input(currentLevel, "Aggregates");
    this->Input(currentLevel, "Nullspace");
 
    // Get CoarseMap from previously defined block
    RCP<const FactoryBase> prevCoarseMapFact = this->GetFactory("CoarseMap");
    TEUCHOS_TEST_FOR_EXCEPTION(prevCoarseMapFact==Teuchos::null, Exceptions::RuntimeError, "MueLu::BlockedCoarseMapFactory::getDomainMapOffset: user did not specify CoarseMap of previous block. Do not forget to set the CoarseMap factory.");
    currentLevel.DeclareInput("CoarseMap", prevCoarseMapFact.get(), this);
  }
 
  template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
  void BlockedCoarseMapFactory<Scalar, LocalOrdinal, GlobalOrdinal, Node>::Build(Level &currentLevel) const
  {
    FactoryMonitor m(*this, "Build", currentLevel);
 
    GlobalOrdinal domainGIDOffset = GetDomainGIDOffset(currentLevel);
    CoarseMapFactory::BuildCoarseMap(currentLevel, domainGIDOffset);
  }
 
  template <class Scalar, class LocalOrdinal, class GlobalOrdinal, class Node>
  GlobalOrdinal BlockedCoarseMapFactory<Scalar, LocalOrdinal, GlobalOrdinal, Node>::GetDomainGIDOffset(
    Level& currentLevel) const
  {
    RCP<const FactoryBase> prevCoarseMapFact = this->GetFactory("CoarseMap");
    RCP<const Map> subPDomainMap = currentLevel.Get<RCP<const Map>>("CoarseMap", prevCoarseMapFact.get());
    GlobalOrdinal maxGlobalIndex = subPDomainMap->getMaxAllGlobalIndex();
 
    return maxGlobalIndex + Teuchos::ScalarTraits<GlobalOrdinal>::one();
  }
 
} //namespace MueLu
 
#endif /* MUELU_BLOCKEDCOARSEMAPFACTORY_DEF_HPP_ */