[BEAM-10220] Add support for implicit nulls in de/serializing JSON

• Type: New Feature
• Status: Resolved
• Priority: P3
• Resolution: Fixed
• Fix Version/s: 2.23.0
• Component/s: extensions-java-json
• Assignee: Reuben van Ammers
• Reporter: Reuben van Ammers
• Created: 09/Jun/20 05:33
• Updated: 24/Jul/20 20:02
• Resolved: 17/Jun/20 15:29

Description

Currently,  RowJson.java doesn't have support for deserialising JSON with fields missing - it fails, even if the beam schema is nullable. This is often a problem for reading JSON as nulls are very commonly represented by omitting the field. Additionally, for this reason, not writing nulls is a reasonable when converting from Beam rows to JSON.

This would help to allow https://issues.apache.org/jira/browse/BEAM-7624 to be implemented. 

Issue Links

• links to: GitHub Pull Request #11955
• links to: GitHub Pull Request #12035