java - JPA Criteria builder IN clause query

Question

How to write criteria builder api query for below given JPQL query? I am using JPA 2.2.

SELECT * 
FROM Employee e
WHERE e.Parent IN ('John','Raj')
ORDER BY e.Parent

question from:https://stackoverflow.com/questions/42530677/jpa-criteria-builder-in-clause-query

Answer 1

This criteria set-up should do the trick:

CriteriaBuilder cb = entityManager.getCriteriaBuilder();
CriteriaQuery<Employee> q = cb.createQuery(Employee.class);


Root<Employee> root = q.from(Employee.class);
q.select(root);

List<String> parentList = Arrays.asList(new String[]{"John", "Raj"});

Expression<String> parentExpression = root.get(Employee_.Parent);
Predicate parentPredicate = parentExpression.in(parentList);
q.where(parentPredicate);
q.orderBy(cb.asc(root.get(Employee_.Parent));

q.getResultList();

I have used the overloaded CriteriaQuery.where method here which accepts a Predicate.. an in predicate in this case.