Composite Key in Toplink Mapping File - equivalent to Hibernate?

Question

Hi,
I have a POJO TestEntity which refers to primary key TestEntityKey. In Hibernate mapping hbm file, we define the entry as:
          <composite-id name="id" class="TestEntityKey">
               <key-property name ="testEntityCode" column = "TEST_ENT_CODE" type = "string" />
          </composite-id>
Please confirm how to create the composite id in Toplink means kindly help that how to map my id to key:
<opm:primary-key>
     <opm:attribute-name>id</opm:attribute-name>
<opm:field table="TEST_ENTITY_B" name="TEST_ENT_CODE" xsi:type="opm:column"/>
</opm:primary-key>
Thanks!

Answer 1

Hey.. Thanks!
I am clear about the concept about defining annotation based composite key. Also, I read in the documentation that I'll be needing to define as direct, aggregate or one-to-one. But, I am not able to define and run the same in the project mapping xml of toplink.
It would be great if you can share some sample code for defining the same. For e.g. in my mentioned example, there is TestEntity POJO having 'id' as the attribute which gets populated with the testEntityCode of the TestEntityKey POJO. Please suggest the same for the same:
<opm:primary-key>
<opm:attribute-name>id</opm:attribute-name>
<opm:field table="TEST_ENTITY_B" name="TEST_ENT_CODE" xsi:type="opm:column"/>
</opm:primary-key>
Thanks!