Getting raw XML from a webservice request without SOAPHandler

Question

I need to get the raw XML from a web service request. Searching in google and stackoverflow I find a solution that seems good:

Getting raw XML response from Java web service client

but my problem is that I don't have the library of the SOAPHandler available. There's something else I can do to achive my purpose without implementing the SOAPHandler? (May be with a more general Handler?)

Thank you.