fromJson static method

MetricThreshold? fromJson(dynamic value)

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

Implementation

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

    return MetricThreshold(
      level: mapValueOfType<String>(json, r'level')!,
      operator_: mapValueOfType<String>(json, r'operator')!,
      value: mapValueOfType<double>(json, r'value')!,
      valueUnit: mapValueOfType<String>(json, r'value_unit'),
      windowSeconds: mapValueOfType<int>(json, r'window_seconds'),
    );
  }
  return null;
}