Class versioning & equals()/hashCode()

fuzebest · **Joined:** Fri Dec 17, 2004 10:38 am **Posts:** 54

Is it necessary to include class fields used for versioning (version or timestamp) into equals() and hashCode() methods?

max · **Posted:** Tue Dec 21, 2004 1:01 pm

you should not need it - why ?

Use a natural key for equals/hashcode.

id,version,timestamp are all something that changes on insert (and version/timestamp also on updates) thus they are not safe to use for equals and hashcode while being in a java 2 collection.