I'm using hibernate 2.1.2 and I want to use the <any> relationship in order to achieve the "table-per-concrete-class" inheritance mapping strategy (as described in chapter 16 of the pdf).
I got one example working which uses a class that has one id field of type string.

The next thing I need is to get it working when the conrete class uses a composite id. I tried adding an extra column entry to the <any> section (as suggested in section 5.2.5) but that resulted in an error. Also if I do this I do not know what to specify as id-type.



Currently I have something like this which is NOT working

<class name="Parent">
.....

<any name="child" meta-type="class" id-type="java.lang.String">
<column name="childClass"/>
<column name="childId1"/>
<column name="childId2"/>
</any>

</class>

<class name="concretChild1" >
<composite-id>
<key-property name="key1" column="XZY"/>
<key-property name="key2" column="ZER"/>
</composite-id>
.....
</class>

in the database/hibernate class key1 is a string and key2 is an int

thanks for your pointers