fromJson static method

AggregationValue? fromJson(dynamic value)

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

Implementation

// ignore: prefer_constructors_over_static_methods
static AggregationValue? 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(() {
      return true;
    }());

    return AggregationValue(
      groups: mapCastOfType<String, String>(json, r'groups') ?? const {},
      stringValue: mapValueOfType<String>(json, r'stringValue'),
      numericValue: mapValueOfType<double>(json, r'numericValue'),
      distinctCount: mapValueOfType<int>(json, r'distinctCount'),
      distinctCounts: mapCastOfType<String, double>(json, r'distinctCounts') ?? const {},
    );
  }
  return null;
}