[jira] Resolved: (COLLECTIONS-250) containsKey on MultiHashMap seems incorrect

["James Carman (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/COLLECTIONS-250?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

James Carman resolved COLLECTIONS-250.
--------------------------------------

    Resolution: Invalid
      Assignee: James Carman

I believe we have established that this is the desired functionality.  Changing it now would break other code which relies upon the existing behavior.

> containsKey on MultiHashMap seems incorrect
> -------------------------------------------
>
>                 Key: COLLECTIONS-250
>                 URL: https://issues.apache.org/jira/browse/COLLECTIONS-250
>             Project: Commons Collections
>          Issue Type: Bug
>          Components: Map
>    Affects Versions: 3.1, 3.2
>            Reporter: Nikhil G. Daddikar
>         Assigned To: James Carman
>            Priority: Critical
>
> MultiHashMap m = new MultiHashMap();
> m.putAll("key", Collections.EMPTY_LIST);
> System.out.println(m.containsKey("key")) 
> It says false, when it should have printed true. 
> The problem is that the code in MultiHashMap and even MultiValueMap has in putAll():
> if (values == null || values.size() == 0) 
> {
>             return false;
> }
> This means that they key is never being entered into the Map. This is causing a huge problem because the behaviour has changed.

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