fromJson static method

WindContract? fromJson(dynamic value)

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

Implementation

// ignore: prefer_constructors_over_static_methods
static WindContract? 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 "WindContract[$key]" is missing from JSON.');
        assert(json[key] != null,
            'Required key "WindContract[$key]" has a null value in JSON.');
      });
      return true;
    }());

    return WindContract(
      speed: Speed.fromJson(json[r'speed'])!,
      direction: Azimuth.fromJson(json[r'direction'])!,
      gusts: WindContractGusts.fromJson(json[r'gusts']),
    );
  }
  return null;
}