I'm not trying to actually get an Role object partially constructed, I'm just trying to get the permissions attribute (a set of Permission objects) for the role with id=2.
I was expecting the call to typedQuery.getResultList() to return a list of collections with just one element: the collection of permission objects for the role with id = 2. This is an attempt to select just the "permissions" collection from the object role with id = 2.
The Role and Permission classes have been mapped with JPA and some Hibernate annotations like this:
public abstract class Role implements Serializable {
/**
* The id of this role. Internal use only.
*
* @since 1.0
*/
@Id @GeneratedValue
protected long id;
/**
* Set of permissions granted to this role.
*
* @since 1.0
*/
@OneToMany(cascade = { CascadeType.PERSIST, CascadeType.MERGE }, mappedBy="sourceRole")
protected Set<Permission> permissions = new HashSet<Permission>();
...
}
public class Permission implements Serializable {
private static final long serialVersionUID = 1L;
/**
* The id of this permission. Used internally for persistence.
*
* @since 1.0
*/
@Id @GeneratedValue
@Column(name = "PERMISSION_ID")
protected long id;
/**
* The group to which the owner of this permission is being granted permission to.
*
* @since 1.0
*/
@ManyToOne(cascade = { CascadeType.PERSIST, CascadeType.MERGE })
@JoinColumn(name = "TARGET_ROLE_ID")
@ForeignKey(name = "FK_TARGET_GROUP_PERMISSION_ID",
inverseName = "FK_PERMISSION_ID_TARGET_GROUP")
protected Group targetGroup;
/**
* The role that has been granted this permission.
*
* @since 1.0
*/
@ManyToOne(cascade = { CascadeType.PERSIST, CascadeType.MERGE })
@JoinColumn(name = "SOURCE_ROLE_ID")
@ForeignKey(name = "FK_SOURCE_GROUP", inverseName = "FK_GROUP_PERMISSIONS")
private Role sourceRole;
...
}
I'm new to criteria queries and I'm having a hard time finding what's wrong with it.
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