How to Adapt existing SOAP + spring application for Rest with Json ??

Hi,

I have a project that exposes some functionalities over SOAP using spring-ws. I am using JAXB api to generate model classes from the XSD, and a Marshalling Payload Endpoint. Now requirement has come to expose the same functionalities using JSON. Can any one guide me about the best approaches that I can go for, such that there will be re-use of existing model components ?

Any kind of suggestions/pointers are appreciated.

Thanks,
Aravind