[jira] [Created] (COLLECTIONS-436) Add a method that returns an empty collection if a passed in collection is null

["Arman Sharif (JIRA)" <ji...@apache.org>]

Arman Sharif created COLLECTIONS-436:
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             Summary: 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 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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