将JQL转换为CriteriaBuilder [英] Convert JQL to CriteriaBuilder

问题描述

好..我被卡住了.

有人可以帮我转换此JQL

Can someone help me converting this JQL

从1处选择FROM资产(从a.类别c选择c)

SELECT a FROM Asset a WHERE ?1 IN (SELECT c FROM a.categories c)

categories是Enum的集合.我很难转换WHERE部分.我不明白为什么CriteriaBuilder.IN方法只接收一个值.

categories is a collection of Enum. I have difficulty converting the WHERE part. I don't understand why method CriteriaBuilder.IN only receive one value.

有人可以帮助我吗?

推荐答案

尝试类似的方法:

        CriteriaBuilder qb = em.getCriteriaBuilder();
        CriteriaQuery<Asset> cq = qb.createQuery(Asset.class);
        Root<Asset> asset = cq.from(Asset.class);
        cq.where(qb.parameter(Category.class, "category").in(asset.<Collection<?>>get("categories"))));
        Query query = em.createQuery(cq);

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