createServiceObject function

Object? createServiceObject(dynamic json, List<String> expectedTypes)

Implementation

Object? createServiceObject(dynamic json, List<String> expectedTypes) {
  if (json == null) return null;

  if (json is List) {
    return json.map((e) => createServiceObject(e, expectedTypes)).toList();
  } else if (json is Map<String, dynamic>) {
    String? type = json['type'];

    // Not a Response type.
    if (type == null) {
      // If there's only one expected type, we'll just use that type.
      if (expectedTypes.length == 1) {
        type = expectedTypes.first;
      } else {
        return Response.parse(json);
      }
    } else if (_isNullInstance(json) &&
        (!expectedTypes.contains('InstanceRef'))) {
      // Replace null instances with null when we don't expect an instance to
      // be returned.
      return null;
    }
    final typeFactory = _typeFactories[type];
    if (typeFactory == null) {
      return null;
    } else {
      return typeFactory(json);
    }
  } else {
    // Handle simple types.
    return json;
  }
}