private static List<Pair<String, String>> insert(Class<?> actorClass) { if (actorClass != null) { final WebActor wa = actorClass.getAnnotation(WebActor.class); final List<Pair<String, String>> ret = new ArrayList<>(4); for (String httpP : wa.httpUrlPatterns()) addPattern(ret, httpP, "websocket"); for (String wsP : wa.webSocketUrlPatterns()) addPattern(ret, wsP, "ws"); classToUrlPatterns.put(actorClass, ret); return ret; } return null; }