[jira] [Resolved] (ARROW-13044) [Java] Union vectors should extend ValueVector

["Bryan Cutler (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-13044?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bryan Cutler resolved ARROW-13044.
----------------------------------
    Fix Version/s: 5.0.0
       Resolution: Fixed

Issue resolved by pull request 10513
[https://github.com/apache/arrow/pull/10513]

> [Java] Union vectors should extend ValueVector
> ----------------------------------------------
>
>                 Key: ARROW-13044
>                 URL: https://issues.apache.org/jira/browse/ARROW-13044
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Java
>    Affects Versions: 4.0.1
>            Reporter: Bryan Cutler
>            Assignee: Bryan Cutler
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 5.0.0
>
>          Time Spent: 1h 10m
>  Remaining Estimate: 0h
>
> I was going to try using a DenseUnionVector as the underlying vector of an extension type but it's not currently possible because ExtensionTypeVector has a type constraint for the underlying storage to extend BaseValueVector and the union vectors do not extend this class.
> It should be possible for UnionVector and DenseUnionVector to extend AbstractContainerVector, which is a subclass of ValueVector, then relax the type constraint for an ExtensionTypeVector to use the ValueVector interface.



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