fromJson static method

State? fromJson(dynamic value)

Returns a new State instance and imports its values from value if it's a Map, null otherwise.

Implementation

// ignore: prefer_constructors_over_static_methods
static State? fromJson(dynamic value) {
  if (value is Map) {
    final json = value.cast<String, dynamic>();

    // Ensure that the map contains the required keys.
    // Note 1: the values aren't checked for validity beyond being non-null.
    // Note 2: this code is stripped in release mode!
    assert(() {
      requiredKeys.forEach((key) {
        assert(json.containsKey(key), 'Required key "State[$key]" is missing from JSON.');
        assert(json[key] != null, 'Required key "State[$key]" has a null value in JSON.');
      });
      return true;
    }());

    return State(
      bytes: mapValueOfType<int>(json, r'bytes'),
      consumerCount: mapValueOfType<int>(json, r'consumer_count'),
      firstSeq: mapValueOfType<int>(json, r'first_seq'),
      firstTs: mapDateTime(json, r'first_ts', r''),
      lastSeq: mapValueOfType<int>(json, r'last_seq'),
      lastTs: mapDateTime(json, r'last_ts', r''),
      messages: mapValueOfType<int>(json, r'messages'),
      numDeleted: mapValueOfType<int>(json, r'num_deleted'),
      numSubjects: mapValueOfType<int>(json, r'num_subjects'),
    );
  }
  return null;
}