Method UpdateObjectsFromStates

Serialization/Manager/vtkObjectManager.cxx:686–713

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//------------------------------------------------------------------------------
void vtkObjectManager::UpdateObjectsFromStates()
{
  // Reset dependency cache as it will be rebuilt.
  this->Context->ResetDirectDependencies();
  // All objects go under the top level root node
  vtkMarshalContext::ScopedParentTracker rootNodeTracker(this->Context, vtkObjectManager::ROOT());
  // only deserialize those objects which are strong references
  nlohmann::json strongRefStates;
  const auto& states = this->Context->States();
  std::copy_if(states.begin(), states.end(), std::back_inserter(strongRefStates),
    [](const nlohmann::json& item)
    {
      return item.contains("vtk-object-manager-kept-alive") &&
        item["vtk-object-manager-kept-alive"] == true;
    });
  const auto deserializerOwnershipKey = this->Deserializer->GetObjectDescription();
  for (const auto& state : strongRefStates)
  {
    const auto identifier = state.at("Id").get<vtkTypeUInt32>();
    auto object = this->Context->GetObjectAtId(identifier);
    this->Deserializer->DeserializeJSON(identifier, object);
    this->Context->KeepAlive(deserializerOwnershipKey, object);
  }
  // Remove unused objects
  this->PruneUnusedObjects();
  // Remove unused states
  this->PruneUnusedStates();
}

//------------------------------------------------------------------------------
void vtkObjectManager::UpdateStatesFromObjects()