fromJson static method

Implementation

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

    return TimeSeries(
      target: mapValueOfType<String>(json, r'target'),
      tags: mapValueOfType<Object>(json, r'tags'),
      datapoints: json[r'datapoints'] is List
          ? (json[r'datapoints'] as List)
              .map((e) => e == null ? null : (e as List).cast<num?>())
              .toList()
          : [],
    );
  }
  return null;
}