Function LoadNewJSONPreset

Modules/Multilabel/src/mitkMultiLabelIOHelper.cpp:130–219

  bool LoadNewJSONPreset(const std::string& presetFilename,
    mitk::MultiLabelSegmentation* inputImage)
  {
    if (nullptr == inputImage)
      return false;

    std::ifstream input(presetFilename);
    if (!input.is_open())
    {
      return false;
    }

    nlohmann::json fileContent;
    try
    {
      input >> fileContent;
    }
    catch (const nlohmann::json::parse_error& e)
    {
      mitkThrow() << "Cannot read data due to parsing error. Parse error: " << e.what() << '\n';
    }

    //check version
    int version = 0;

    if (!mitk::MultiLabelIOHelper::GetValueFromJson<int>(fileContent, "version", version))
    {
      MITK_WARN << "Preset has unknown version. Assuming that it can be read. Result might be invalid.";
    }
    else
    {
      const int MULTILABEL_SEGMENTATION_VERSION_VALUE = 4;
      if (version > MULTILABEL_SEGMENTATION_VERSION_VALUE)
      {
        mitkThrow() << "The preset you are trying to load has an unsupported version. "
            << "This software is too old to ensure correct loading. "
            << "Please use a compatible version of MITK or save the data in another format. "
            << "Data version: " << version 
            << "; supported versions up to: " << MULTILABEL_SEGMENTATION_VERSION_VALUE;

      }
    }

    auto groupInfos = mitk::MultiLabelIOHelper::DeserializeMultiLabelGroupsFromJSON(fileContent["groups"]);

    mitk::MultiLabelSegmentation::GroupIndexType groupIndex = 0;
    for (const auto& groupInfo : groupInfos)
    {
      auto cleanedLabels = mitk::MultiLabelIOHelper::CloneLabelsWithoutMetaProperties(groupInfo.labels);

      if (inputImage->ExistGroup(groupIndex))
      { //group exists so update name and labels
        inputImage->SetGroupName(groupIndex, groupInfo.name);

        for (auto label : cleanedLabels)
        {
          if (inputImage->ExistLabel(label->GetValue(), groupIndex))
          {