senseidb/bobo — pull request #11 by wesleygong (2012-08-01 03:17:19+00:00)
Title: Handle null strings when sorting by StringOrdComparator

When using StringOrdComparator, it returns null values as "null", which the SortCollector comparator does not check for when sorting. This causes the sort to not order properly. Proposed potential fix. Thanks!