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bad advice.
see http://www.hibernate.org/109.html for proper hashcode and equals.

The recomendation of using the properties of an object rather then
the object identity and or synthetic primary key is just as broken as
the problem we are trying to highlight and solve.
See http://www.hibernate.org/109.421.html for more details.

This tutorial does not recommend that properties of the object be used in the object's identity; however, it does demonstrate that you can choose to implement at least partial behavior for these methods in the super class so that comparing object id fields can be done with the super.equals() or super.hashcode() methods instead of redefining this behavior in each mapped object class.

Please feel free to post your suggested changes.,

I forgot to mention. Really please post your suggestions, I'm interested to see how I can improve what is there now. I've read the discussions on equals and hashcode, but it's possible I've made a mistake?