Ejb 3.0 on OC4J preview 4 CMR is this a BUG

Question

Exception [TOPLINK-48] (Oracle TopLink - 10g release 3 (10.1.3.0.0) (Build 05091
2)): oracle.toplink.exceptions.DescriptorException
Exception Description: Multiple writable mappings exist for the field [ENVINCIDE
NTS.INCIDENTS_ID]. Only one may be defined as writable, all others must be spec
ified read-only.
Mapping: oracle.toplink.mappings.OneToOneMapping[incidents]
Descriptor: RelationalDescriptor(model.Envincidents --> [DatabaseTable(ENVINCIDE
NTS)])
as I understand the CMR uses toplink somewhere under the hood.
from the docs I got this...
@OneToMany(cascade=PERSIST)
@JoinColumn(name="MANAGER_ID", referencedColumnName="EMP_ID")
public Collection getManagedEmployees() {
return managedEmployees;
TopLink defaults and equivalent code
OneToManyMapping mapping = new OneToManyMapping();
mapping.setIsReadOnly(false);
mapping.setIsPrivateOwned(false);
mapping.setAttributeName(attributeName);
mapping.setReferenceClass(referenceClass);
in Toplink mapping there is setIsReadOnly() but how do
I specify this in ejb 3.0 annotations. I get the above error
whenever I use any sort of relationship in my ejbs and have the
same column defined as primary key in the table.

Answer 1

Take a look at this forum Re: CMR in ejb 3.0
You basically need to make one of your mappings as read-only and I would recommend doing it with your basic mapping as it is easier to maintain with the set of the @ManyToOne relationship.
Doug