Java Hibernate Criteria选择子类

以下应该工作：

Criteria c = session.createCriteria(document.class, "document");c.createAlias("document.recipients", "recipient");c.add(Restrictions.in("recipient.class", Arrays.asList(SubClass1.class, SubClass2.class,SubClass3.class)));c.add(Restrictions.eq("recipient.name", theName));