Prime faces auto complete fail when using hibernate template

Hi,

I'm using primes faces as a view technology with webflow.

I'm trying to use autocomplete feature... such as

Code:

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<p:autoComplete completeMethod="#{searchCriteria.complete}"/>

---

searchCriteria is a flowScope bean and should stay this way.
The complete() method is delegating the query to a @Service injected by Spring. This service uses an hibernate template to perform the query.

Fortunately HibernateTemplate is not serializable as well as SessionFactory etc. hence, when displaying my search page I get NotSerializableException...

How can I bypass webflow serialization ? When I use my searchCriteria bean in a session scope (out of webflow's serialization mechanism) it works fine of course but this is not the scope I want to use...

Help !
Thanks...
Ben