<id name="id" column="uid" type="long" unsaved-value="null">
Then you write this code:
Event e = (Event) session.load(Event.class, 1);
01:46:14,375 DEBUG LongType:79 - binding '1' to parameter: 1 01:46:14,375 INFO LongType:89 - could not bind value '1' to parameter: 1 java.sql.SQLException: Statement parameter 1 not set.
How sneaky! The type is long, but the literal 1 is an int and will be boxed into an Integer. Darn. Write this and things will work:
Event e = (Event) session.load(Event.class, 1L);