The client code that was generated should contain methods that allow you to access the response data directly, without having to work with the actual SOAP response. What are you trying to achieve by creating some other object from the response? And -assuming that there's a good reason for it- what would be the rules for converting a SOAP response to a Java bean?
Listen. That's my theme music. That's how I know I'm a super hero. That, and this tiny ad told me:
SKIP - a book about connecting industrious people with elderly land owners