Bug 453183

Description of problem:
Most of our persistent classes (i.e., classes managed by Hibernate) do not
implement equals() and hashCode(). These methods are critical for entity types
as well as as any class in which instances are stored in a Collection.
Documentation on this can be found in the Hibernate reference manual at
http://www.hibernate.org/hib_docs/reference/en/html/persistent-classes.html.
This article on the Hibernate site, http://www.hibernate.org/109.html also
provides some good information. 

This has already resulted in production bugs and really should be addressed
sooner rather than later.

Implementing and testing equals() and hashCode() can be difficult. I have
implemented some test libraries to aide in testing. The class ObjectTestUtils
greatly simplifies the verification effort involved. This class is part of the
jbossnetwork project and resides in the test-utils module.

I have also implemented methods to facilitate implementing equals() and
hashCode(), CustomEqualsBuilder and HashCodeBuilderFactory in particular. These
classes handle some MySQL date issues. See Users.java for an example. It is in
the jbossnetwork project in the issuetracker module. 


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