IsmDeviceApi.java 文件源码

private DeviceMemberEntity getDeviceMember(Long deviceId, Long memberId, String memName) {
    CriteriaBuilder criteriaBuilder = IsmDeviceApi.this.em.getCriteriaBuilder();
    CriteriaQuery<DeviceMemberEntity> query = criteriaBuilder.createQuery(DeviceMemberEntity.class);
    Root<DeviceMemberEntity> r = query.from(DeviceMemberEntity.class);

    if (memName != null) {
        query.select(r)
        .where(criteriaBuilder.and((criteriaBuilder.equal(r.get("device").get("id"), deviceId)),
                (criteriaBuilder.equal(r.get("name"), memName))));
    } else {
        query.select(r).where(criteriaBuilder.and((criteriaBuilder.equal(r.get("device").get("id"), deviceId)),
                criteriaBuilder.equal(r.get("id"), memberId)));
    }

    List<DeviceMemberEntity> result = IsmDeviceApi.this.em.createQuery(query).getResultList();

    return result.isEmpty() == true ? null : result.get(0);
}