Question on standard complex parameters

[easterguest]

I'm in the process of spec'ing a web services framework, and several of 
our ws will be exchanging the usual suspects such as images (tiff, jpg, 
custom), electronic documents (doc, pdf) etc.
I'm not really fussy as to whether the ws calls are made over SOAP or 
HTTP, but was wondering there exists any framework (preferably a Java 
API) which already handles the  marshalling/unmarshalling of 
suchcomplex  objects , and which interfaces nicely with Axis.
I'd appreciate any info or links in this regard from those of you who 
had similar requirements.

Thanks
.