Repo created

libs/search/lazy_centers_table.cpp

@@ -0,0 +1,56 @@
+#include "search/lazy_centers_table.hpp"
+
+#include "indexer/mwm_set.hpp"
+
+#include "platform/mwm_traits.hpp"
+
+#include "defines.hpp"
+
+namespace search
+{
+LazyCentersTable::LazyCentersTable(MwmValue const & value)
+  : m_value(value)
+  , m_state(STATE_NOT_LOADED)
+  , m_reader(std::unique_ptr<ModelReader>())
+{}
+
+void LazyCentersTable::EnsureTableLoaded()
+{
+  if (m_state != STATE_NOT_LOADED)
+    return;
+
+  try
+  {
+    m_reader = m_value.m_cont.GetReader(CENTERS_FILE_TAG);
+  }
+  catch (RootException const & ex)
+  {
+    LOG(LERROR, ("Unable to load", CENTERS_FILE_TAG, ex.Msg()));
+    m_state = STATE_FAILED;
+    return;
+  }
+
+  version::MwmTraits traits(m_value.GetMwmVersion());
+  auto const format = traits.GetCentersTableFormat();
+
+  if (format == version::MwmTraits::CentersTableFormat::PlainEliasFanoMap)
+    m_table = CentersTable::LoadV0(*m_reader.GetPtr(), m_value.GetHeader().GetDefGeometryCodingParams());
+  else if (format == version::MwmTraits::CentersTableFormat::EliasFanoMapWithHeader)
+    m_table = CentersTable::LoadV1(*m_reader.GetPtr());
+  else
+    CHECK(false, ("Unknown centers table format."));
+
+  if (m_table)
+    m_state = STATE_LOADED;
+  else
+    m_state = STATE_FAILED;
+}
+
+bool LazyCentersTable::Get(uint32_t id, m2::PointD & center)
+{
+  EnsureTableLoaded();
+  if (m_state != STATE_LOADED)
+    return false;
+  return m_table->Get(id, center);
+}
+}  // namespace search