UserDefinedTypeCompositeAttributeDef.fromJson constructor

UserDefinedTypeCompositeAttributeDef.fromJson(
  1. Object? json_
)

Returns a new instance from a JSON value. May throw if the value does not have the expected structure.

Implementation

factory UserDefinedTypeCompositeAttributeDef.fromJson(Object? json_) {
  final json = json_ is Map
      ? _spec.fields.map((f) => json_[f.label]).toList(growable: false)
      : json_;
  return switch (json) {
    [final name, final dataType, final collation] ||
    (final name, final dataType, final collation) =>
      UserDefinedTypeCompositeAttributeDef(
        name: Ident.fromJson(name),
        dataType: DataType.fromJson(dataType),
        collation: Option.fromJson(collation,
            (some) => (some! as Iterable).map(Ident.fromJson).toList()).value,
      ),
    _ => throw Exception('Invalid JSON $json_')
  };
}