Method Load

libs/search/cities_boundaries_table.cpp:47–109

CitiesBoundariesTable ---------------------------------------------------------------------------

// CitiesBoundariesTable ---------------------------------------------------------------------------
bool CitiesBoundariesTable::Load()
{
  auto handle = FindWorld(m_dataSource);
  if (!handle.IsAlive())
  {
    LOG(LWARNING, ("Can't find World map file."));
    return false;
  }

  // Skip if table was already loaded from this file.
  if (handle.GetId() == m_mwmId)
    return true;

  MwmContext context(std::move(handle));
  base::Cancellable const cancellable;
  auto const localities = CategoriesCache(LocalitiesSource{}, cancellable).Get(context);

  auto const & cont = context.m_value.m_cont;

  if (!cont.IsExist(CITIES_BOUNDARIES_FILE_TAG))
  {
    LOG(LWARNING, ("No cities boundaries table in the world map."));
    return false;
  }

  vector<vector<CityBoundary>> all;
  double precision;

  try
  {
    auto reader = cont.GetReader(CITIES_BOUNDARIES_FILE_TAG);
    ReaderSource<ReaderPtr<ModelReader>> source(reader);
    CitiesBoundariesSerDes::Deserialize(source, all, precision);
  }
  catch (Reader::Exception const & e)
  {
    LOG(LERROR, ("Can't read cities boundaries table from the world map:", e.Msg()));
    return false;
  }

  if (all.size() != localities.PopCount())
  {
    LOG(LERROR, ("Wrong number of boundaries, expected:", localities.PopCount(), "actual:", all.size()));
    return false;
  }

  m_mwmId = context.GetId();
  m_table.clear();
  m_eps = precision;
  size_t idx = 0, notEmpty = 0;
  localities.ForEach([&](uint64_t fid)
  {
    if (!all[idx].empty())
    {
      CHECK(m_table.emplace(base::asserted_cast<uint32_t>(fid), std::move(all[idx])).second, ());
      ++notEmpty;
    }
    ++idx;