[ARROW-5902] [Java] Implement hash table and equals & hashCode API for dictionary encoding

• Type: New Feature
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.15.0
• Component/s: Java
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/22315
• Assignee: Ji Liu
• Reporter: Ji Liu
• Created: 10/Jul/19 12:47
• Updated: 11/Jan/23 07:43
• Resolved: 19/Jul/19 03:42

Description

As discussed in https://github.com/apache/arrow/pull/4792

Implement a hash table to only store hash & index, meanwhile add check equal function in ValueVector API.

Issue Links

• links to: GitHub Pull Request #4846