[AVRO-3644] [JAVA] Support java.util.Optional in reflect package

• Type: Improvement
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Fix Version/s: 1.12.0
• Component/s: java
• Labels: pull-request-available
• Assignee: Daniel Heinrich
• Reporter: Daniel Heinrich
• Created: 18/Oct/22 17:56
• Updated: 10/May/23 17:31
• Resolved: 10/May/23 17:31

Description

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"]

Issue Links

• links to: GitHub Pull Request #1915