YMapDelta.fromJson constructor

YMapDelta.fromJson(Object? json_)

Returns a new instance from a JSON value. May throw if the value does not have the expected structure.

Implementation

factory YMapDelta.fromJson(Object? json_) {
  final json = json_ is Map
      ? _spec.fields.map((f) => json_[f.label]).toList(growable: false)
      : json_;
  return switch (json) {
    [final action, final oldValue, final newValue] ||
    (final action, final oldValue, final newValue) => YMapDelta(
      action: YMapDeltaAction.fromJson(action),
      oldValue: Option.fromJson(
        oldValue,
        (some) => YValue.fromJson(some),
      ).value,
      newValue: Option.fromJson(
        newValue,
        (some) => YValue.fromJson(some),
      ).value,
    ),
    _ => throw Exception('Invalid JSON $json_'),
  };
}