Parse xml when required in JSf

Question

hello all,

We are using webservices everywhere in our apps(JSF-SPRING based) for accessing the data.So in all cases we will be getting data in the form of xml. We can expect the xml to be very large containing number of nodes.Now the requirement is that if hundereds of nodes are coming in the request xml and I only want to parse the one I required. Can someone please tell me the approach as how can I achieve this. I am thinking of digester-rules.xml for configuration purposes.Please let me know your thoughts on this.