Hibernate: Should I include the 'version' field to hashcode() and equals() methods

I know that when overriding hashcode() and equals() of my persistent entities I should not include ID and only include the meaningful properties that uniquely identify the object. But what about version field w开发者_运维问答hich is used for the optimistic concurrency control by Hibernate? Should I skip it as well, just like ID? What if let's say new User(name='John', version=1).equals(new User(name='John',version=2)), won't it confuse Hibernate OCC anyhow?

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It is recommended that you implement equals() and hashCode() using Business key equality. Business key equality means that the equals() method compares only the properties that form the business key. It is a key that would identify our instance in the real world (a natural candidate key)

So you should not include version property in the equals() hashcode()

Refer: http://docs.jboss.org/hibernate/core/3.3/reference/en/html/persistent-classes.html#persistent-classes-equalshashcode