@Override
        public int compare(Entry<Object, String> o1, Entry<Object, String> o2) {
            return o1.getValue().compareTo(o2.getValue());
        }
{@code JDOQLSerializer} serializes Querydsl queries and expressions into JDOQL strings

@author tiwe
querydsl-jdo/src/main/java/com/querydsl/jdo/JDOQLSerializer.java