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Posted to issues@commons.apache.org by "Gary D. Gregory (Jira)" <ji...@apache.org> on 2026/06/17 22:27:00 UTC

[jira] [Resolved] (COLLECTIONS-880) MultiMapUtils.invert should allow an ordinary Map as input

     [ https://issues.apache.org/jira/browse/COLLECTIONS-880?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gary D. Gregory resolved COLLECTIONS-880.
-----------------------------------------
    Fix Version/s: 4.6.0
       Resolution: Fixed

`org.apache.commons.collections4.MultiMapUtils.invert(MultiValuedMap<? extends V, ? extends K>, M)` is in git master.

 

> MultiMapUtils.invert should allow an ordinary Map as input
> ----------------------------------------------------------
>
>                 Key: COLLECTIONS-880
>                 URL: https://issues.apache.org/jira/browse/COLLECTIONS-880
>             Project: Commons Collections
>          Issue Type: Improvement
>            Reporter: Sebb
>            Priority: Major
>             Fix For: 4.6.0
>
>
> There is no particular reason for the input Map to be a MultiMap.
> There should be a way to invert a Map into a MultiMap.



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