@Override
public Page<OrderHistory> findAll(Pageable pageable, Long userId, Long orderId) {
    return orderHistoryRepository.findAll((root, query, cb) -> {
        List<Predicate> list = new ArrayList<>();
        if 
 
(userId != null) {
            list.add(cb.equal((root.get("userId").as(Long.class)), userId));
        }
        list.add(cb.notEqual((root.get("id").as(Long.class)), orderId));
        Predicate[] p = new Predicate[list.size()];
        query.where(cb.and(list.toArray(p)));
        return query.getRestriction();
    }, pageable);
}