Method DoRead

Modules/Segmentation/autoload/IO/mitkSegmentationTaskListIO.cpp:157–269

}

std::vector<mitk::BaseData::Pointer> mitk::SegmentationTaskListIO::DoRead()
{
  auto* stream = this->GetInputStream();
  std::ifstream fileStream;

  if (nullptr == stream)
  {
    auto filename = this->GetInputLocation();

    if (filename.empty() || !fs::exists(filename))
      mitkThrow() << "Invalid or nonexistent filename: \"" << filename << "\"!";

    fileStream.open(filename);

    if (!fileStream.is_open())
      mitkThrow() << "Could not open file \"" << filename << "\" for reading!";

    stream = &fileStream;
  }

  nlohmann::json json;

  try
  {
    json = nlohmann::json::parse(*stream);
  }
  catch (const nlohmann::json::exception& e)
  {
    mitkThrow() << e.what();
  }

  if (!json.is_object())
    mitkThrow() << "Unknown file format (expected JSON object as root)!";

  if ("MITK Segmentation Task List" != json.value("FileFormat", ""))
    mitkThrow() << "Unknown file format (expected \"MITK Segmentation Task List\")!";

  int version;

  if (version = json.value<int>("Version", 0); version < 1 || version > 3)
    mitkThrow() << "Unknown file format version (expected \"1\", \"2\", or \"3\")!";

  if (!json.contains("Tasks") || !json["Tasks"].is_array())
    mitkThrow() << "Tasks array not found!";

  auto segmentationTaskList = SegmentationTaskList::New();

  try
  {
    if (json.contains("Name"))
      segmentationTaskList->SetProperty("name", StringProperty::New(json["Name"].get<std::string>()));

    if (json.contains("Defaults"))
    {
      segmentationTaskList->SetDefaults(json["Defaults"].get<SegmentationTaskList::Task>());

      if (segmentationTaskList->GetDefaults().HasResult())
        mitkThrow() << "Defaults must not contain \"Result\"!";