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https://issues.apache.org/jira/browse/JDO-751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15138608#comment-15138608
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Tilmann Zäschke commented on JDO-751:
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I completely agree with the answers.
Just to clarify the first question: I see that 'Optional' should be allowed to
reference persistence classes (as FCOs) as well as SCOs (such as String, ...).
But I guess Optional itself should not be a persistent type?
Also, I think we have to decide whether we want to distinguish the case that
the reference to Optional could be null vs Optional references a null:
{{private Optional<Date> date;}} -> {{date==null}} vs {{date.isPresent}}.
This is also important for queries, because again {{"date==null"}} would mean
something different than {{"date.isPresent()"}}
> Support for Java8 Optional
> --------------------------
>
> Key: JDO-751
> URL: https://issues.apache.org/jira/browse/JDO-751
> Project: JDO
> Issue Type: New Feature
> Components: specification, tck
> Reporter: Andy Jefferson
>
> java.util.Optional provides a feature that is available in other languages.
> Since JDO 3.2 will be for Java8+ then it makes sense to add support for this
> as a "supported persistable type"
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