Java 8 Optional ?

[hr.stoyanov]

Question: how is Java 8's Optional type treated for serialization and data binding?

[mbarkley]

Hi Hristo,

Currently Errai is using GWT 2.8.0-beta1 which does not have java.util.Optional, so there is no special handling of Optional. There won't be any special integration in of Optional in Errai until there is a new GWT release containing it.

[baldram]

Please see JDK emulation section of the change log for GWT 2.8.0 RC1 (pulished today).

gwt-site/release-notes.md at master · gwtproject/gwt-site · GitHub

The Java8 Optional feature has been introduced (Emulate Optional<T> and its int, long, double variants).

So it looks like it solves the issue

[hr.stoyanov]

Max,

Gwt 2.8.0-RC1 already provides emulation for Optional