Some notes and tips:
1. 1. Typical current code
getCurrentSession().createCriteria(BT.class)
.add(Restrictions.eq("replacedBT",
replaced))
.addOD(OD.desc("id")).list();
Will be replaced by
CriteriaQuery<BT> criteriaQuery =
getCurrentSession().getCriteriaBuilder().createQuery(BT.class);
Root<BT> root = criteriaQuery.from(BT.class);
CriteriaBuilder cb =
getCurrentSession().getCriteriaBuilder();
criteriaQuery.select(root).where(getCurrentSession().getCriteriaBuilder().equal(root.get("replacedBT"),
replaced));
criteriaQuery.ODBy(cb.desc(root.get("id")));
2.
Mapping
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Hibernate |
JPA |
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1 |
setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY) |
criteriaQuery.select(root).distinct(true) |
|
2 |
setProjection(Property.forName("id") |
criteriaQuery.multiselect(root.get("id")) |
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3 |
Disjunction |
CriteriaBuilder disjunction(); Ex: Predicate predicate =
cb.disjunction(); predicate.getExpressions().add(cb.isNull(root.get("effectiveEndDate"))); predicate.getExpressions().add(cb.greaterThanOrEqualTo(root.get("effectiveEndDate"),
DateUtil.getLienDateForTestY(testY.intValue()))); |
|
4 |
Criterion |
predicate.getExpressions().add( |
|
5 |
Restrictions.in ("testY",
Ys) |
root.get("testY").in(Ys) |
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6 |
Restrictions.le |
lessThanOrEqualTo |
|
7 |
Restrictions.ilike - case insensitive |
cb.like(cb.lower(root.get("assesseeName")),
"%"+name.trim().toLowerCase() + "%" |
|
8 |
Build list of conditions
many if else |
List<Predicate>
predicates = new ArrayList<>(); predicates.add(join.get("testId").in(oidSub)); predicates.add(cbSub.notEqual(rootBT.get("pmStatus"),
BTPmStatus.paidStatus)); predicates.add(cbSub.notEqual(rootBT.get("status"),
TestBTStatus.canceled)); predicates.add(cbSub.notEqual(rootBT.get("status"),
TestBTStatus.purged)); predicates.add(cbSub.notEqual(rootBT.get("status"),
TestBTStatus.rolledToUnsecured )); |
|
9 |
Join BTCrit.createCriteria("testCharges","chg"); BTCrit.add
(Restrictions.in("chg.testId", oidSub) ); |
Join<BT,
Charge> join = rootBT.join("testCharges", JoinType.INNER); criteriaQueryBT.select(rootBT).where(join.get("testId").in(oids),
cbBT.equal(rootBT.get("testY"), testY), rootBT.get("BTType").in(types) ); |
|
10 |
Multiple Join List<JTestOD> chains =
getCurrentSession()
.createCriteria(JTestOD.class) .add(Restrictions.not(Restrictions.eq("state",
JTestODState.open))) .createCriteria("traTranss") .createCriteria("JTransProperties")
.add(Restrictions.eq("id.apn",prop.getPropertyId()))
.add(Restrictions.eq("propertyAvTestY",prop.getTestY())) // .add(Restrictions.eq("chainedToTestOD",
co)) // .setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY) // .list(); |
CriteriaQuery<JTestOD>
criteriaQuery = getCurrentSession().getCriteriaBuilder().createQuery(JTestOD.class); CriteriaBuilder cb =
getCurrentSession().getCriteriaBuilder(); Root<JTestOD> root = criteriaQuery.from(JTestOD.class); Join<JTestOD, JTraTrans> join =
root.join("traTranss", JoinType.INNER); Join<JTraTrans, JTransProperty>
join2 = join.join("JTransProperties", JoinType.INNER);
criteriaQuery.select(root).distinct(true) .where( cb.notEqual(root.get("state"),
JTestODState.open), cb
.equal(join2.get("id").get("apn"), prop.getPropertyId()), cb.equal(join2.get("propertyAvTestY"),
prop.getTestY()), cb
.equal(join2.get("chainedToTestOD"), co)); List<JTestOD> chains =
getCurrentSession().createQuery(criteriaQuery).getResultList(); |
