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Can any body tell me how to get the properties of the composite id from the Configuration instance?
<class
name="vpo.Tcustcontactorrela"
table="TCUSTCONTACTORRELA"
>
<composite-id name="id" class="vpo.TcustomercontactorPK">
<key-property name="ccustno" column="C_CUSTNO"></key-property>
<key-property name="lcontactorid" column="L_CONTACTORID"></key-property>
<key-property name="ccontactortypecode" column="C_CONTACTORTYPECODE"></key-property>
</composite-id>
</class>
I know how to get the identifier: cfg.getClassMapping(entity.getClass()).getIdentifier(); But what about the composite id?
Thank you advance!

Won't that be the composite id? You should be able to use this to check if a particular id is composite or not:Also, one of these should be true for composite ids (depending on whether or not the compsite-id is mapped, i.e. whether or not it has the class="???" attribute):

Thank you tenwit, assume that the composite id is mapped, but now I still don't know how to retrieve the property's name.

For that sort of detail, you want getIdentifierMapper() instead of getIdentifier(). Then you can use getPropertyIterator() and getComponentClass() to go through the hibernate properties and POJO accessors.

I'm very sorry to forget to tell the version of hibernate I'm using.
The version I'm using now is 2.1.2 final, so there is no such method in the PersistentClass. Is that mean I can't get the properties' name of the composite id in hibernate 2.1.2?

I can't say for sure, but I think what you need isOf course, you need to do the appropriate instanceof checks, etc.

Hi, tenwit, with your help, I have solved my problems.
I'm very glad to say thank you and you are so kind a person, : )