How to do inner join using only ID in Hibernate Criteria API?

Assume I have this mapping:

class User {
    String name;开发者_高级运维
    ...
}
class Department {
    String id;
    User owner;
    ...
}
class Employee {
    String departmentId; //legacy code, I cannot change this
}

I want to query all Employees sorted by their department owner's name (sorted by Employee.departmentId.owner.name) using Hibernate Criteria API.

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Criteria api or hql works with relational mapping so you can not use something like departmentId.owner.name. But there are some solutions here.