i'm trying to persist several implementations of ProfilePermission interface in one table.. my map file looks like this:

<hibernate-mapping>
<class name="gov.ProfilePermission" table="profilepermission">
<id name="id" column="id">
<generator class="uuid.hex"/>
</id>
<discriminator column="permissiontype" type="string"/>
<property name="name"/>
<property name="action"/>
<subclass name="CountryPermission"/>
<subclass name="GroupPermission"/>
<subclass name="TheaterPermission"/>
</class>
</hibernate-mapping>

do i need a mapping file for each of the subtypes?

i'm getting:
net.sf.hibernate.MappingException: persistent class [CountryPermission] not found
....
Caused by: java.lang.ClassNotFoundException: CountryPermission

here's how i'm trying to persist:

Configuration cfg = new Configuration();
cfg.addClass(Profile.class);
cfg.addClass(ProfilePermission.class);
cfg.addClass(CountryPermission.class);
SessionFactory sessionFactory = cfg.buildSessionFactory();
Session session = sessionFactory.openSession();
Transaction transaction = session.beginTransaction();
session.save(profile);
transaction.commit();
session.close();


do i need to list each of the possible subtypes in the configuration?

thanks for any help.

G

Specify the full classname in your mappings (including package) or us the package attribute of the hibernate-mapping element.

ahh.. that was a dumb oversite!

ok, that got me to the next step, its still barfing, this time looking for a mapping file for the implemented class (CountryPermission.hbn.xml)..

is it the case that you must have a mapping file for EACH class?

i have read the docs and have searched this forum, but they don't explain in detail which files are required when using the subclass element.

thanks for any help
g

i'm not sure whats going on.

i have it working to the point of no error messages being thrown, but the subclasses are not being saved in the database.

if I add the subclass types to the configuration object, then hibernate barfs and says i need to provide a mapping file for those subclasses. if I only add the interface that the subclasses implement (ProfilePermission), then i get no errors, but the objects are not saved.

does this indicate anything in particular as the problem?

thanks
G

where is discriminator-value attribute?

well, i didn't include the discriminator-value attributes because the docs say its optional, as the class name will be used if you don't provide one.. but ok, i did try it with that attribute and got the same problem.

i'm still not clear about what i should be putting in my Configuration object, when trying to save a collection of several different implementations of an interface? do i add each concreate class to the Configuration?

of course, i've tried doing this and hibernate complains that its missing the concrete class's mapping file.

so, i'd really like to know what is needed.. do you need a mapping file for each of the concrete classes for the interface or just a general one for the interface?

thanks for any help.

G

If you use Configuration.addClass(), yes, it is normal to have a separate document for each class. If you want something else - well, Configuration has plenty of JavaDoc.