public class UpdateableMongoStore {

    public void save(Updateable updateable) {

        if(!updateable.isUpdated()) {

            System.out.println("new object");
            System.out.println(updateable);

        } else {

            System.out.println("update an object");
            System.out.println(updateable);

            /* build some update query using `updateable.getUpdates()` */

            /* save them to store */
        }
    }

    /* other store methods */
}