/**
* @see DATAJPA-403
*/
@Test
public void reusesExistingJoinForExpression() {
CriteriaBuilder builder = em.getCriteriaBuilder();
CriteriaQuery<User> query = builder.createQuery(User.class);
Root<User> from = query.from(User.class);
PropertyPath managerFirstname = PropertyPath.from("manager.firstname", User.class);
PropertyPath managerLastname = PropertyPath.from("manager.lastname", User.class);
QueryUtils.toExpressionRecursively(from, managerLastname);
QueryUtils.toExpressionRecursively(from, managerFirstname);
assertThat(from.getJoins(), hasSize(1));
}
/**
* @see DATAJPA-401
*/
@Test
public void doesNotCreateAJoinForNonOptionalAssociation() {
CriteriaBuilder builder = em.getCriteriaBuilder();
CriteriaQuery<Order> query = builder.createQuery(Order.class);
Root<Order> root = query.from(Order.class);
QueryUtils.toExpressionRecursively(root, PropertyPath.from("customer", Order.class));
}
/**
* @see DATAJPA-454
*/
@Test
public void createsJoingToTraverseCollectionPath() {
CriteriaBuilder builder = em.getCriteriaBuilder();
CriteriaQuery<User> query = builder.createQuery(User.class);
Root<User> root = query.from(User.class);
QueryUtils.toExpressionRecursively(root, PropertyPath.from("colleaguesLastname", User.class));
assertThat(root.getJoins(), hasSize(1));
}
/**
* @see DATAJPA-401
*/
@Test
public void createsJoinForOptionalAssociation() {
CriteriaBuilder builder = em.getCriteriaBuilder();
CriteriaQuery<User> query = builder.createQuery(User.class);
Root<User> root = query.from(User.class);
QueryUtils.toExpressionRecursively(root, PropertyPath.from("manager", User.class));
assertThat(root.getJoins(), hasSize(1));
}