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Posted to issues@commons.apache.org by "Anirudh Vyas (JIRA)" <ji...@apache.org> on 2011/05/03 02:26:03 UTC
[jira] [Commented] (COLLECTIONS-88) [collection] Map filter with
MapUtils.predicatedMap feature request
[ https://issues.apache.org/jira/browse/COLLECTIONS-88?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13027952#comment-13027952 ]
Anirudh Vyas commented on COLLECTIONS-88:
-----------------------------------------
I don't buy that argument, I can submit the patch if thats what it takes, I still feel this is a valid issue, and the method should be called filter( ) on MapUtils, that solution being described is ugly. My 2 cents.
Anirudh
> [collection] Map filter with MapUtils.predicatedMap feature request
> -------------------------------------------------------------------
>
> Key: COLLECTIONS-88
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-88
> Project: Commons Collections
> Issue Type: Bug
> Affects Versions: 3.1
> Environment: Operating System: other
> Platform: Other
> Reporter: Luc Carpentier
>
> Hello,
> I stumbled into the following problem:
> A client submits an http request with prefixed parameters. Each prefix will
> have it's own javabean to populate. So if there are two prefixes, then there
> will be two different javabeans to populate from the request parameters.
> I created a PrefixPredicate that only allows values with a specific prefix. I
> then used this PrefixPredicate to copy the Map with the request parameters to
> a predicated Map with:
> Map predicatedMap = MapUtils.predicatedMap(dataMap,keyPredicate,null);
> However, since the request parameters contain parameters with other prefixes
> as well, this returns an IllegalArgumentException.
> It would be nice to be able to specify to the MapUtils.predicatedMap method to
> ignore entries that do not comply to the predicate instead of to throw an
> exception.
> There are lots of possabilities to filter on a Collection, but a Map is not a
> collection...
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