* @throws ExportException if the object cannot be exported
*/
private Proxy doExportTo(Object object, ObjID objID, URI uri,
Class proxyClass) throws ExportException {
ObjectRef ref = new ObjectRef(objID, object, proxyClass);
Proxy proxy = ref.addProxy(getRoute(uri));
_objIDMap.put(objID, ref);
_objectMap.put(object, ref);
return proxy;
}