JAVA get what method implements a REST service from url

I have a new implementation of picketlink PathAuthorizer (org.picketlink.http.authorization.PathAuthorizer) that check if an url is allowed for the user.

public class BssPathAuthorizer implements PathAuthorizer {

@Inject Identity identity;



@Override
public boolean authorize(PathConfiguration pc, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) {

    if( identity != null){

        LOG.log(Level.FINE, "Identity loggato: {0}", identity.isLoggedIn());
        String uri = request.getRequestURI();
        String contextpath = request.getContextPath();
        LOG.log(Level.FINE, "URI: {0}, context path: {1}", new Object[]{uri, contextpath});

        Method m = findMethod(uri);...

After I get the method by "findMethod()", i'll check some annotations and i return true if the user has permission.

There is a simple way to retrieve from webservice url (for example: .../user/edit) what is the class-method that implement it ( for example UserManager.edit() )?