[ARROW-1497] [Java] JsonFileReader doesn't set value count for some vectors

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.7.1
• Component/s: Java
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/17516
• Assignee: Li Jin
• Reporter: Li Jin
• Created: 08/Sep/17 16:14
• Updated: 11/Jan/23 07:15
• Resolved: 20/Sep/17 17:40

Description

Currently, in complex types, JsonFileReader only sets value count for NullableMapType by an instance check, this is error prone and cause issues with reading other complex types:

https://github.com/apache/arrow/blob/master/java/vector/src/main/java/org/apache/arrow/vector/file/json/JsonFileReader.java#L269

We should have a better way to do this.

Issue Links

• links to: GitHub Pull Request #1067