JPA Method
in javax.persistence.criteria.CriteriaBuilder

Predicate isMember(
  Expression<E> elem, 
  Expression<C> collection
)

Create a predicate that tests whether an element is a member of a collection. If the collection is empty, the predicate will be false.
Parameters:
elem - element expression
collection - expression
Return:
is-member predicate
Since:
JPA 2.0