THRIFT-318. java: Performance of HashSet for enumeration VALID_VALUES seems poor

Instead of a HashSet, enums will now use the special IntRangeSet implementation. 

git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@743037 13f79535-47bb-0310-9956-ffa450edef68
2 files changed