XmlBean usage and the clone() method.

I'm trying to use the XmlBean class as the superclass for all our business objects and we have an issue with the usage of the clone method.
Basically our business objects all throw the CloneNotSupportedException (as per Object.clone() signature) while XmlBean.clone() does not throw it. Introducing XmlBean into the hierarchy will cause quite a bit of effort to change clone() signatures for a lot of classes. So, we were wondering if there is any alternative to subclassing XmlBean while at the same time using the efficient caching that it gives us. I guess I'm looking for a "composition" approach rathe than an "inheritance" approach that might work.
Has anyone faced this issue and is there any other workaround?
Thanks,
--Das

The reason that I asked is that the exception is "old baggage" from a design flaw in the original JDK 1.0 .. it is a checked exception that can never happen on an object that implements Cloneable, so if you don't throw it, and you implement Cloneable, then it won't be thrown on clone().
Peace,
Cameron Purdy
Tangosol, Inc.
Coherence: Shared Memories for J2EE Clusters

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