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https://issues.apache.org/jira/browse/COLLECTIONS-436?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13531210#comment-13531210
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Gary Gregory commented on COLLECTIONS-436:
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Feel free to submit a patch with unit tests ;)
Gary
> Add a method that returns an empty collection if a passed in collection is
> null
> -------------------------------------------------------------------------------
>
> Key: COLLECTIONS-436
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-436
> Project: Commons Collections
> Issue Type: Wish
> Components: Collection
> Reporter: Arman Sharif
> Priority: Minor
>
> Would it be possible to add methods to CollectionUtils that return an empty
> collection if given a {{null}}? e.g.
> {code:java}
> public static <T> List<T> emptyIfNull(List<T> list) {
> return list == null ? Collections.<T>emptyList() : list;
> }
> public static <T> Set<T> emptyIfNull(Set<T> set) {
> return set == null ? Collections.<T>emptySet() : set;
> }
> public static <K,V> Map<K,V> emptyIfNull(Map<K,V> map) {
> return map == null ? Collections.<K,V>emptyMap() : map;
> }
> {code}
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