I have a table with a composite id :

<composite-id
name="comp_id_PROJECT_VERSIONS"
class="PROJECT_VERSIONSPK">
<!-- bi-directional many-to-one association to PROJECTS -->
<key-many-to-one
name="PROJECTS"
class="PROJECTS">
<column name="PROJECT_ID" />
</key-many-to-one>
<key-property
name="PROJECT_VERSION_ID"
column="PROJECT_VERSION_ID"
type="java.lang.Integer"
length="18"/>
</key-property>
</composite-id>

i want the column PROJECT_VERSION_ID to take automaticaly value from an oracle sequence. So i think i need to place the below directive :

<generator class="sequence">
<param name="sequence">SEQ_PROJECT_VERSIONS_PK</param>
</generator>

somewhere but i do not know where.
Can you give me a hint? Should I use id or collection-id instead of composite-id?

Thanks in advance.

auto-generation with composite ids is not possible.

Thank you for your quick answer