fromJson static method
Returns a new TimeSpan instance and imports its values from
value
if it's a Map, null otherwise.
Implementation
// ignore: prefer_constructors_over_static_methods
static TimeSpan? 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 "TimeSpan[$key]" is missing from JSON.');
assert(json[key] != null, 'Required key "TimeSpan[$key]" has a null value in JSON.');
});
return true;
}());
return TimeSpan(
ticks: mapValueOfType<int>(json, r'Ticks'),
days: mapValueOfType<int>(json, r'Days'),
hours: mapValueOfType<int>(json, r'Hours'),
milliseconds: mapValueOfType<int>(json, r'Milliseconds'),
minutes: mapValueOfType<int>(json, r'Minutes'),
seconds: mapValueOfType<int>(json, r'Seconds'),
totalDays: mapValueOfType<double>(json, r'TotalDays'),
totalHours: mapValueOfType<double>(json, r'TotalHours'),
totalMilliseconds: mapValueOfType<double>(json, r'TotalMilliseconds'),
totalMinutes: mapValueOfType<double>(json, r'TotalMinutes'),
totalSeconds: mapValueOfType<double>(json, r'TotalSeconds'),
);
}
return null;
}