fromJson static method
Returns a new TimeSeries instance and imports its values from
value
if it's a Map, null otherwise.
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(
fields: json[r'fields'] is List ? (json[r'fields'] as List).cast<String>() : const [],
samples: json[r'samples'] is List
? (json[r'samples'] as List).map((e) => e == null ? const <num>[] : (e as List).cast<num>()).toList()
: const <List<num>>[],
min: json[r'min'] is List ? (json[r'min'] as List).cast<num>() : const [],
max: json[r'max'] is List ? (json[r'max'] as List).cast<num>() : const [],
mean: json[r'mean'] is List ? (json[r'mean'] as List).cast<num>() : const [],
median: json[r'median'] is List ? (json[r'median'] as List).cast<num>() : const [],
variance: json[r'variance'] is List ? (json[r'variance'] as List).cast<num>() : const [],
);
}
return null;
}