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\',\'         


        

Answer 1

Not to break your head when you need to do this again using Criteria API - you can create a parent wrapper class for your Dao and put a hepler method there:

/**
  * An SQL "WHERE IN" expression alternative.
  *
  * @param inList List to search in.
  * @param pathToEntityField Path to a field in your entity object.
  * @return A ready predicate-condition to paste into CriteriaQuery.where().
  */
 @SuppressWarnings("unchecked")
 private Predicate in(List inList, Expression pathToEntityField) {

   return pathToEntityField.in(inList);
}

Use WHERE IN then like:

query.where(**in**(myList, root.get(MyTypedEntity_.id)));