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https://issues.apache.org/jira/browse/JDO-751?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15154475#comment-15154475
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Craig L Russell commented on JDO-751:
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I'd like to think how to accommodate object databases, where the user really
wants to distinguish three cases in the datastore:
Case 1. Null value
Case 2. Empty value
Case 3. Present value
I think that a straight mapping that preserves the three cases is in alignment
with the specification. How to distinguish them in JDOQL might be simple.
Case 1. prop == null
Case 2. !prop.isPresent()
Case 3. prop.isPresent()
Using the shorthand age == 7 would mean (age.isPresent() && age.get()==7)
Is that good enough?
> 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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