On Wed, 2 Dec 2020 17:57:22 GMT, Mandy Chung <mch...@openjdk.org> wrote:
> I suggest `Class::getPermittedSubclasses` to return a `non-null` array if > this `Class` is sealed, i.e. this class is derived from a `class` file with > the presence of `PermittedSubclasses` attribute regardless of its content > (the attribute could be empty or contains zero or more entries which is a > properly loaded permitted subtype. > > If this `Class` is not sealed, `Class::getPermittedSubclasses` returns null > (see `Class::getRecordComponents` and some other reflection APIs as > precedence). Agree, that seems reasonable. Often, methods in `Class` with an array return type default to an empty array, but `getRecordComponents` is a good example of returning `null` when an empty array is meaningful. ------------- PR: https://git.openjdk.java.net/jdk/pull/1483
