MapConverter.fromJson constructor

Implementation

factory MapConverter.fromJson(Map<String, Object?> json) {
  final map = <String, FieldFormat>{};
  for (final key in json.keys) {
    final value = json[key];
    if (value is String) {
      map[key] = FieldFormat.preserveType(key);
    } else if (value is Map<String, Object?>) {
      final type = value['type'];
      final named = value['name'] as String?;
      if (type is Map<String, dynamic>) {
        map[key] = FieldFormat.convertMap(
          named: named ?? key,
          destinationFormat: MapConverter.fromJson(type),
        );
        continue;
      }
      final converter = FieldFormat.defaultconverters[type];
      if (converter != null) {
        map[key] = FieldFormat(
          name: named ?? key,
          convert: converter,
        );
      } else {
        map[key] = FieldFormat.preserveType(
          named ?? key,
        );
      }
    } else {
      throw ArgumentError.value(
        value,
        'value',
        'Invalid value for key $key in ${json[key]}',
      );
    }
  }
  return MapConverter(map: map);
}