void serializeQuery(PersistenceManager pm) throws Exception {
Query query = pm.newQuery();
query.setClass(PCPoint.class);
query.setCandidates(pm.getExtent(PCPoint.class, false));
query.setFilter("x == 3");
query.compile();
ObjectOutputStream oos = null;
try {
if (debug) logger.debug("Attempting to serialize Query object.");
oos = new ObjectOutputStream(new FileOutputStream(SERIALZED_QUERY));