How to insert value for composed foreign key?

Question

My problem when I update or insert to table Ffclient which has link 1-1 with other table ClientLoan by composes primary key loanId and clienId (break table). I auto mapping by Jdeveloper 10g version 10.1.2. In FfClient table has two fields compose foreign key of ClientLoan as loanId and clienId not nullable. In toplink object Ffclient it only has one reference ClientLoan object by clientLoan field, not has two fields loanId and clienId . When I insert or update to database, I can't set value for these two fields direct so I have created new ClientLoan object and set value for composed primary key loanId and clienId, after that set it to object Ffclient. But when I update or insert to database it occurs exception about insert null for two not nullable fields: loanId and clienId.
Any one has error as mime? Any one help me correct my error.
Thanks in advance.
Mapping is:
….
<database-mapping>
<attribute-name>ffclientCollection</attribute-name>
<read-only>false</read-only>
<get-method-name>getFfclientCollection</get-method-name>
<set-method-name>setFfclientCollection</set-method-name>
<reference-class>uk.co.lsb.elb.toplink.Ffclient</reference-class>
<relationship-partner-attribute-name>clientLoan</relationship-partner-attribute-name>
<is-private-owned>false</is-private-owned>
<uses-batch-reading>false</uses-batch-reading>
<indirection-policy>
<mapping-indirection-policy>
<type>oracle.toplink.internal.indirection.TransparentIndirectionPolicy</type>
</mapping-indirection-policy>
</indirection-policy>
<container-policy>
<mapping-container-policy>
<container-class>oracle.toplink.indirection.IndirectList</container-class>
<type>oracle.toplink.internal.queryframework.ListContainerPolicy</type>
</mapping-container-policy>
</container-policy>
<source-key-fields>
<field>LSB.CLIENT_LOAN.CLIENT_ID</field>
<field>LSB.CLIENT_LOAN.LOAN_ID</field>
</source-key-fields>
<target-foreign-key-fields>
<field>LSB.FFCLIENT.CLIENT_ID</field>
<field>LSB.FFCLIENT.LOAN_ID</field>
</target-foreign-key-fields>
<type>oracle.toplink.mappings.OneToManyMapping</type>
</database-mapping>
…..
<database-mapping>
<attribute-name>clientLoan</attribute-name>
<read-only>false</read-only>
<reference-class>uk.co.lsb.elb.toplink.ClientLoan</reference-class>
<relationship-partner-attribute-name>ffclientCollection</relationship-partner-attribute-name>
<is-private-owned>false</is-private-owned>
<uses-batch-reading>false</uses-batch-reading>
<indirection-policy>
<mapping-indirection-policy>
<type>oracle.toplink.internal.indirection.BasicIndirectionPolicy</type>
</mapping-indirection-policy>
</indirection-policy>
<uses-joining>false</uses-joining>
<foreign-key-fields>
<field>LSB.FFCLIENT.CLIENT_ID</field>
<field>LSB.FFCLIENT.LOAN_ID</field>
</foreign-key-fields>
<source-to-target-key-field-associations>
<association>
<association-key>LSB.FFCLIENT.LOAN_ID</association-key>
<association-value>LSB.CLIENT_LOAN.LOAN_ID</association-value>
</association>
<association>
<association-key>LSB.FFCLIENT.CLIENT_ID</association-key>
<association-value>LSB.CLIENT_LOAN.CLIENT_ID</association-value>
</association>
</source-to-target-key-field-associations>
<type>oracle.toplink.mappings.OneToOneMapping</type>
</database-mapping>

Answer 1

Yes, many thanks for you reply.
My project has many layer (include DAO + EJB + BO + WEB).
Toplink objects which are auto created by TopLink has only using in DAO and EJB layer, then toplink objects are transfer to Bean objects (valueObject) which are contain primitive java type as int, long, double... not java wrapper object as Integer, Long, Double... Bean objects are using from EJB to WEB layer. So when set value to bean object from toplink object I sometime don't set all reference toplink object to reference object of bean (although bean has references bean object as toplink object) because there are too big. So when I update data from WEB layer to EJB layer, before update to database, I must get fill all data for foreign key of update object by create new reference toplink object, add reference_id to this object and set it to update object. I waste a lot of time, its very handwork and tire. Are you has any solution about this problem?
Thank in advanced.
ThangNQ