Creating alias in Hibernate to reference subclass issue

Question

I am trying to create some aliases to build a criteria to search by properties of many subclasses. Here is my model:

public abstract class Entity {

protected int id;
protected PartyBasicGroup partyBasicGroup;

}

public class Person extends Entity {

}

public class Organization extends Entity {

protected PartyBasicGroup signatoryBasicGroup;
protected String jobTitle;  
}

I am trying to create some aliases for Person and Organization as follows:

criteria = criteria.createAlias("entity.person", "person", JoinType.LEFT_OUTER_JOIN);
criteria = criteria.createAlias("entity.organization", "organization", JoinType.LEFT_OUTER_JOIN);

But I'm getting an error:

Couldn't resolve property person for Entity

Any help to fix this issue? I just wanna know how to create aliases to reference subclasses in order to access subclasses properties.

Thanks!

What is the final query you are trying to execute here ? Because "entity.person" and "entity.organization" has no meaning, Person and Organization are subclasses of Entity, not properties ! — overmeulen, Feb 18 '13 at 15:45
I'm trying to search specific jobTitles but I don't know how to create the alias to access the properties of Organization. I know there are subclasses, but I have seen in another codes that Hibernate lets deal with them as properties. — user2083783, Feb 18 '13 at 16:39

score 0 · Answer 1 · answered Feb 18 '13 at 16:48

I don't understand why you want to use aliases here. The following should be enough :

Criteria criteria = session.createCriteria(Organization.class);
criteria = criteria.add(Restrictions.eq("jobTitle", "XYZ"));
List<Organization> organizations = (List<Organization>) criteria.list();

Creating alias in Hibernate to reference subclass issue

1 Answers1