Xpetra_StridedMapFactory_def.hpp

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// WARNING: This code is experimental. Backwards compatibility should not be expected.

#ifndef XPETRA_STRIDEDMAPFACTORY_DEF_HPP
#define XPETRA_STRIDEDMAPFACTORY_DEF_HPP

#include "Xpetra_StridedMapFactory_decl.hpp"

#include "Xpetra_Exceptions.hpp"

namespace Xpetra {

template<class LocalOrdinal, class GlobalOrdinal, class Node>
RCP<Xpetra::StridedMap<LocalOrdinal, GlobalOrdinal, Node>>
StridedMapFactory<LocalOrdinal, GlobalOrdinal, Node>::
Build(UnderlyingLib                                 lib,
      global_size_t                                 numGlobalElements,
      GlobalOrdinal                                 indexBase,
      std::vector<size_t>&                          stridingInfo,
      const Teuchos::RCP<const Teuchos::Comm<int>>& comm,
      LocalOrdinal                                  stridedBlockId,
      GlobalOrdinal                                 offset,
      LocalGlobal                                   lg)
{
  return rcp(new Xpetra::StridedMap<LocalOrdinal, GlobalOrdinal, Node>(lib, numGlobalElements, indexBase, stridingInfo, comm, stridedBlockId, offset, lg));
}


template<class LocalOrdinal, class GlobalOrdinal, class Node>
RCP<Xpetra::StridedMap<LocalOrdinal,GlobalOrdinal,Node>>
StridedMapFactory<LocalOrdinal, GlobalOrdinal, Node>::
Build(UnderlyingLib                                 lib,
      global_size_t                                 numGlobalElements,
      size_t                                        numLocalElements,
      GlobalOrdinal                                 indexBase,
      std::vector<size_t>&                          stridingInfo,
      const Teuchos::RCP<const Teuchos::Comm<int>>& comm,
      LocalOrdinal                                  stridedBlockId,
      GlobalOrdinal                                 offset)
{
  return rcp(new StridedMap(lib, numGlobalElements, numLocalElements, indexBase, stridingInfo, comm, stridedBlockId, offset));
}


template<class LocalOrdinal, class GlobalOrdinal, class Node>
RCP<Xpetra::StridedMap<LocalOrdinal,GlobalOrdinal,Node>>
StridedMapFactory<LocalOrdinal, GlobalOrdinal, Node>::
Build(const RCP<const Map>& map,
      std::vector<size_t>&  stridingInfo,
      LocalOrdinal          stridedBlockId,
      GlobalOrdinal         offset)
{
  return rcp(new StridedMap(map, stridingInfo, map->getIndexBase(), stridedBlockId, offset));
}


template<class LocalOrdinal, class GlobalOrdinal, class Node>
RCP<Xpetra::StridedMap<LocalOrdinal,GlobalOrdinal,Node>>
StridedMapFactory<LocalOrdinal, GlobalOrdinal, Node>::
Build(const RCP<const StridedMap>& map, LocalOrdinal stridedBlockId)
{
  TEUCHOS_TEST_FOR_EXCEPTION(stridedBlockId < 0, Exceptions::RuntimeError,
      "Xpetra::StridedMapFactory::Build: constructor expects stridedBlockId > -1.");

  TEUCHOS_TEST_FOR_EXCEPTION(map->getStridedBlockId() != -1, Exceptions::RuntimeError,
      "Xpetra::StridedMapFactory::Build: constructor expects a full map (stridedBlockId == -1).");

  std::vector<size_t> stridingInfo = map->getStridingData();

  Teuchos::ArrayView<const GlobalOrdinal> dofGids = map->getNodeElementList();

  // determine nStridedOffset
  size_t nStridedOffset = 0;
  for (int j = 0; j < map->getStridedBlockId(); j++)
  {
    nStridedOffset += stridingInfo[ j ];
  }

  const size_t numMyBlockDofs = (stridingInfo[stridedBlockId] * map->getNodeNumElements()) / map->getFixedBlockSize();

  std::vector<GlobalOrdinal> subBlockDofGids(numMyBlockDofs);

  // TODO fill vector with dofs
  LocalOrdinal ind = 0;
  for(typename Teuchos::ArrayView<const GlobalOrdinal>::iterator it = dofGids.begin(); it != dofGids.end(); ++it)
  {
    if(map->GID2StridingBlockId(*it) == Teuchos::as<size_t>(stridedBlockId))
    {
      subBlockDofGids[ ind++ ] = *it;
    }
  }

  const Teuchos::ArrayView<const GlobalOrdinal> subBlockDofGids_view(&subBlockDofGids[ 0 ], subBlockDofGids.size());

  return rcp(new StridedMap(map->lib(),
      Teuchos::OrdinalTraits<global_size_t>::invalid(),
      subBlockDofGids_view,
      map->getIndexBase(),
      stridingInfo,
      map->getComm(),
      stridedBlockId));
}


template<class LocalOrdinal, class GlobalOrdinal, class Node>
RCP<Xpetra::StridedMap<LocalOrdinal,GlobalOrdinal,Node>>
StridedMapFactory<LocalOrdinal, GlobalOrdinal, Node>::
Build(const StridedMap& map)
{
  XPETRA_MONITOR("MapFactory::Build");

  LocalOrdinal N = map.getNodeNumElements();
  Teuchos::ArrayView<const GlobalOrdinal> oldElements = map.getNodeElementList();
  Teuchos::Array<GlobalOrdinal> newElements(map.getNodeNumElements());

  for(LocalOrdinal i = 0; i < N; i++)
    newElements[ i ] = oldElements[ i ];

  std::vector<size_t> strData = map.getStridingData();
  return rcp(new StridedMap(map.lib(), map.getGlobalNumElements(), newElements, map.getIndexBase(), strData, map.getComm(), map.getStridedBlockId()));
}


template<class LocalOrdinal, class GlobalOrdinal, class Node>
RCP<Xpetra::StridedMap<LocalOrdinal,GlobalOrdinal,Node>>
StridedMapFactory<LocalOrdinal, GlobalOrdinal, Node>::
Build(UnderlyingLib                                  lib,
      global_size_t                                  numGlobalElements,
      const Teuchos::ArrayView<const GlobalOrdinal>& elementList,
      GlobalOrdinal                                  indexBase,
      std::vector<size_t>&                           stridingInfo,
      const Teuchos::RCP<const Teuchos::Comm<int>>&  comm,
      LocalOrdinal                                   stridedBlockId,      // FIXME (mfh 03 Sep 2014) This breaks if LocalOrdinal is unsigned
      GlobalOrdinal                                  /* offset */)
{
  return rcp(new StridedMap(lib, numGlobalElements, elementList, indexBase, stridingInfo, comm, stridedBlockId));
}

} // namespace Xpetra

#endif // XPETRA_STRIDEDMAPFACTORY_DEF_HPP

// TODO: removed unused methods