Hello, the question is:
In my object model I've got a hierarchy that represents the posible actions (superclass Action, subclasses Create, Pass, Get, Give, Destroy). In my relational model, I've got an only table which stores all these actions, that is, in the table ACTIONS, there is a row for an action:



I want to persist this using Hibernate 2.1.4 with SQL Server 7 and the mapping documents specified below.

Are mapping documents ok??

What I have to do to load these objects (the Action subclasses) from the relational database to the OO application ???

Thank you so much, Gervasio.

P.S: Excuse me for my english... I speak spanish!! ;)


Mapping documents:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC>

<hibernate-mapping>
<class name="Action" table="ACTIONS">
<id name="id" type="int" column="idOperacion">
<generator class="auto-increment"/>
</id>
<discriminator column="description" type="string"/>
<subclass name="Create" discriminator-value="CREATE">
</subclass>
<subclass name="Pass" discriminator-value="PASS">
</subclass>
<subclass name="Get" discriminator-value="GET">
</subclass>
<subclass name="Give" discriminator-value="GIVE">
</subclass>
<subclass name="Destroy" discriminator-value="DESTROY">
</subclass>
</class>
</hibernate-mapping>

just do session.load("from Action")