Integration of CQ5 and ATG

I am trying to integrate CQ5 with ATG.

For this the contents are exposed from ATG as a webservice.

To consume this webservice in CQ5, can I use
a) a java code to parse the contents from the webservice XML, or

b) convert the webservice jar into OSGI bundle and consume in CQ5.

Which is the best approach for this integration?

Is there any other alternate solution for this approach?