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https://issues.apache.org/jira/browse/AVRO-3644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17621287#comment-17621287
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ASF subversion and git services commented on AVRO-3644:
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Commit 627b005493bb8abe6a0ffc53c709ad1b7967c769 in avro's branch
refs/heads/master from Daniel Heinrich
[ https://gitbox.apache.org/repos/asf?p=avro.git;h=627b00549 ]
AVRO-3644: handle java.util.Optional as a nullable value (#1915)
Why:
Javas Optional type can not be used in any meaningful way with the
reflection based schema generation. It is for example not possible
to write a generic custom encoding.
How does it help with resolving the issue:
Optional can be used to make fields null safe in their usage.
Side effects:
I think that this change should not have any side effects, because
Optional fields could not have been used in the past.
> [JAVA] Support java.util.Optional in reflect package
> ----------------------------------------------------
>
> Key: AVRO-3644
> URL: https://issues.apache.org/jira/browse/AVRO-3644
> Project: Apache Avro
> Issue Type: Improvement
> Components: java
> Reporter: Daniel Heinrich
> Assignee: Daniel Heinrich
> Priority: Trivial
> Labels: pull-request-available
> Fix For: 1.12.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> java.util.Optional can currently not be used at all when using reflection
> based schemas.
> _org.apache.avro.reflect.ReflectData#getSchema_ will currently produce the
> following type for fields using Optional:
> {"type":"record","name":"Optional","namespace":"java.util","fields":[]}
> The generated schema is completly unusable (it does not contain any data). I
> would like to propose to map Optional fields as if they were not using
> Optional and would be annotated with @Nullable. So resulting in the following
> type:
> ["null","something"]
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