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Re: [eclipselink-users] Is there a way by which we can map the same column to multipe embedded attribute overrides ? 
Hi Guy

I tried the SessionEventListener workaround that you mentioned, it did not
work for me. I did the following :

public class SessionEventListener extends SessionEventAdapter {

	@Override
	public void postLogin(SessionEvent event) {
		super.postLogin(event);
		Session s = event.getSession();
		ClassDescriptor classDescriptor =
s.getClassDescriptor(com.model.AnotherEmployee.class);
		updateColumnMetaDataForMapping(s,
classDescriptor.getMappingForAttributeName("address1"));
		updateColumnMetaDataForMapping(s,
classDescriptor.getMappingForAttributeName("address2"));
	}

	private void updateColumnMetaDataForMapping(Session s, DatabaseMapping
mapping) {

		boolean isReadOnly = ((AggregateObjectMapping)
mapping).getReferenceDescriptor().getMappingForAttributeName("countryCode").isReadOnly();
		
		((AggregateObjectMapping)
mapping).getReferenceDescriptor().getMappingForAttributeName("countryCode").setIsReadOnly(false);
		((AggregateObjectMapping)
mapping).getReferenceDescriptor().getMappingForAttributeName("countryCode").getField().setInsertable(true);
		((AggregateObjectMapping)
mapping).getReferenceDescriptor().getMappingForAttributeName("countryCode").getField().setUpdatable(true);
		((AggregateObjectMapping)
mapping).getReferenceDescriptor().getMappingForAttributeName("countryCode").initialize((AbstractSession)
s);
		isReadOnly = ((AggregateObjectMapping)
mapping).getReferenceDescriptor().getMappingForAttributeName("countryCode").isReadOnly();
		
	}
}

Just setting setIsReadOnly(false) did not work, i had to explicitly set the
insertable and updatable flags too. This change started giving me the
correct query in DatabaseRecord object, 

	DatabaseRecord(
	JPA_EMP_DIFF_COL_OVRD.EMP_ID => 1201
	JPA_EMP_DIFF_COL_OVRD.EMP_NAME => Employee2
	JPA_EMP_DIFF_COL_OVRD.ADDR1 => Home2
	JPA_EMP_DIFF_COL_OVRD.ADDR1_COUNTRY_CODE => AUS
	JPA_EMP_DIFF_COL_OVRD.ADDR2 => Work2
	JPA_EMP_DIFF_COL_OVRD.ADDR2_COUNTRY_CODE => AUS)


but the query that is getting fired ultimately doesn't reflect this change,
it still gets fired as :
	[EL Fine]: sql: 2012-10-31
17:22:27.499--ClientSession(185058837)--Connection(1583668601)--Thread(Thread[main,5,main])--INSERT
INTO JPA_EMP_DIFF_COL_OVRD (EMP_ID, EMP_NAME, ADDR1, ADDR2) VALUES (?, ?, ?,
?)
		bind => [1901, Employee2, Home2, Work2]
		
		
Although i tried the above mentioned workaround, it is merely impossible for
us to implement such a thing in the current application, as we have a large
number of entities that would use these embeddable classes.

I would like to know if there is any other way by which such a requirement
can be mapped, some custom tag or converter that could do such a thing ? 



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