PodEntityMgr.java 文件源码

public static Pod findExternalId(EntityManager em, String externalId) {

        CriteriaBuilder cb = em.getCriteriaBuilder();

        CriteriaQuery<Pod> query = cb.createQuery(Pod.class);

        Root<Pod> root = query.from(Pod.class);

        query = query.select(root)
                .where(cb.equal(root.get("externalId"), externalId));

        try {
            return em.createQuery(query).getSingleResult();
        } catch (NoResultException nre) {
            return null;
        }
    }