@Override @SuppressWarnings("unchecked") // doPrivileged() returns the correct type public <T extends EventListener> T createListener(Class<T> c) throws ServletException { if (SecurityUtil.isPackageProtectionEnabled()) { try { return (T) invokeMethod(context, "createListener", new Object[] {c}); } catch (Throwable t) { handleThrowable(t); if (t instanceof ServletException) { throw (ServletException) t; } return null; } } else { return context.createListener(c); } }