public static boolean isProviderInstanceOf(Class<?> c) {
        return c.isInstance(authProvider);
    }
Returns whether the currently-installed AuthProvider is instance of a specific class.
@param c the class to compare with
@return true - if the currently-installed AuthProvider is instance of c, false otherwise.
xmppserver/src/main/java/org/jivesoftware/openfire/auth/AuthFactory.java