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https://issues.apache.org/jira/browse/COLLECTIONS-230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Neidhart resolved COLLECTIONS-230.
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Resolution: Fixed
> CollectionUtils.size(null) should return 0
> ------------------------------------------
>
> Key: COLLECTIONS-230
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-230
> Project: Commons Collections
> Issue Type: Wish
> Affects Versions: 3.2
> Reporter: Stepan Koltsov
> Fix For: 4.0
>
>
> Hello,
> CollectionUtils.size(null) currently throws
> IllegalArgumentException("Unsupported object type: null"). I think
> CollectionUtils.size(null) should return 0.
> Why?
> The aim of library is to minimize the amount of code that uses this library.
> In my experience, in the most cases null collections can be threated as as
> zero-length. Current behavior causes the need of many trivial null-checks.
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