Using existing db connection

I have some BC4J uiXML page to representation data from my data model.
Also, I have a DefaultContext object in my HttpSession as attribute.
Can i use this object (DefaultContext) instead connection which was specified during creation data model?

I resolved this problem partiallly. I used dynamic JDBC credentials:
http://otn.oracle.com/products/jdev/howtos/bc4j/howto_dynamic_jdbc.html.

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