Nested properties is not working for addFilterIn and Collection of objects

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Helo,

Thanks for the very useful hibernate generic DAO, your code is.

I'm getting a little problem working on nested attributes and collection of 
mapped objects.

=== Classses ===
public class User implements Serializable {

    @Id
    private long id;

    @ManyToMany(fetch = LAZY)
    @JoinTable(
            name="user_group_user",
            schema="users",
            joinColumns = @JoinColumn(
                    name="userId", 
                    referencedColumnName = "id"), 
            inverseJoinColumns = @JoinColumn(
                    name="groupId", 
                    referencedColumnName = "id")
    )
    @OrderBy
    Set<UserGroup> groups;
}

public class ServiceRequest implements {

    @ManyToOne
    @JoinColumn(name="assignedUserId", referencedColumnName = "id")
    @Fetch(FetchMode.JOIN)
    private User assignedUser;
}
==================

This code is working fine:

Search s = new Search();        
List<Long> uids = new ArrayList<Long>();
uids.add(1l);
uids.add(2l);
s.addFilterIn("assignedUser.id", uids);

This code is not working

Search s = new Search();        
List<UserGroup> groups = new ArrayList<UserGroup>();
groups.add(new UserGroup(1));
groups.add(new UserGroup(2));
s.addFilterIn("assignedUser.groups", groups);

Error: 

Caused by: java.lang.IllegalArgumentException: Property path 
'assignedUser.groups' invalid for type com.sarbarian.itsm.entity.ServiceRequest
    at com.trg.search.jpa.JPAAnnotationMetadataUtil.get(JPAAnnotationMetadataUtil.java:24)
    at com.trg.search.BaseSearchProcessor.prepareValue(BaseSearchProcessor.java:707)
    at com.trg.search.BaseSearchProcessor.filterToQL(BaseSearchProcessor.java:451)
    at com.trg.search.BaseSearchProcessor.generateWhereClause(BaseSearchProcessor.java:413)
    at com.trg.search.BaseSearchProcessor.generateQL(BaseSearchProcessor.java:111)
    at com.trg.search.jpa.JPASearchProcessor.search(JPASearchProcessor.java:88)


Question: What should do I do?

Thanks !!

Davi.

Original issue reported on code.google.com by [email protected] on 8 Oct 2010 at 6:23