Allowing user types within the keys of composite ids

avartanian · **Joined:** Mon Jun 06, 2005 11:21 pm **Posts:** 10

Hibernate version: 3.0rc1

Hello,

I have been trying to use a composite key which has, among its key properties, a user defined type that requires parameters. So, hypothetically, I'd like my mapping file to look something like:

Code:

<class name="Senator" table="us_senate">
   <composite-id>
      <key-property name="state">
         <type name="EnumUserType">
            <param name="enumClassName">State</param>
         </type>
      </key-property>
      <key-property name="rank"/>
   </composite-id>
   ...
</class>

Unfortunately, the mapping DTD doesn't seem to allow these kinds of nested type elements and, as far as I know, I can't toss parameters into a type attribute. I was wondering if I was missing something about why Hibernate doesn't support such a thing.

Any elucidation would be greatly appreciated. To be honest, I'm after understanding more than I'm after a workaround here.

scesbron · **Joined:** Thu Sep 04, 2003 8:23 am **Posts:** 368

As parameterized types are new in hibernate 3 maybe this is a missing functionnality. You can create a JIRA issue to ask for this addition.
Alternatively you can create a typedef like this

Code:

<typedef class=".." name="enumState">
  <param name="enumClassName">State</param>
</typedef>

the only problem is that you have to create one typedef per parameter value