Delete Issue with 1:M Relationship.

Question

We had following Relationship M-M relation mapped through a cross Reference Table.
Table Cust(customer Table), AddrXRef (XRef table), Addr(Address)
Relationship is as follows.
Cust - > AddrXRef 1-M Privatly Owned
AddrXRef -> Cust 1-1
Addr -> AddrXRef 1-M Privatly Owned
AddrXRef -> Addr 1-1
Here the Sittuation we have a use case where two row in AddrXRef table which
share the the same Addr Row for Same Customer. We need to update one of
the AddrXRef row to association with a New Addr row.
We tried create a new instance for instance of Addr Object and associating it
to existing AddrXRef instance.(Both Forward and Back Refrence for Add ->AddrXRef)
The behaviour we see is instance of issue update on AddrXRef table and Insert of new row in Addr table. We see two insert one of new Addr row and one for AddrXRef.
and delete issue for AddrXRef row and old Addr row which is shared with other AddrXRef row.
sample code for method.
     public void validatePackageSentAddress()
CustomerAddress homeAddress = getHomeAddress();
CustomerAddress pkgSentAddress = getPackageSentAddress();
if ( pkgSentAddress != null && homeAddress != null &&
          pkgSentAddress.getDelegate() != null &&
          pkgSentAddress.getAddrUniqNum() != null
          && pkgSentAddress.getAddrUniqNum().equals(homeAddress.getAddrUniqNum()) )
     CustomerAddrXRefBO pkgSentAddrXRefBo = pkgSentAddress.getDelegate();
     CustomerAddressBO newAddrBo = new CustomerAddressBO();
     // Associated new CustAddressBo instance pkgsendAddrXRefBo
     //     1) reference the new Addr from AddrXRef for PkgSent
     // Set from Forward and Back reference
     pkgSentAddrXRefBo.setCustomerAddress(newAddrBo);
     newAddrBo.addCustomerAddrXRef(pkgSentAddrXRefBo);
     // Only specific attribute need to be copied for PackageSent Address
     pkgSentAddress.setCityName(homeAddress.getCityName());
     pkgSentAddress.setCountryDescText(homeAddress.getCountryDescText());
     pkgSentAddress.setCountyDescText(homeAddress.getCountyDescText());
     pkgSentAddress.setStateCd(homeAddress.getStateCd());
     pkgSentAddress.setStreetNum(homeAddress.getStreetNum());
     pkgSentAddress.setStreetName(homeAddress.getStreetName());
     pkgSentAddress.setResidencyTypeCd(homeAddress.getResidencyTypeCd());
     pkgSentAddress.setBldgName(homeAddress.getBldgName());
Message was edited by:
user462895

Answer 1

The problem is that by making the AddrXRef privately owned it cannot be reparented. Once it is removed from it's parent's list (either one) it will be deleted. To achieve what you're trying to do you'll need to delete the old incorrect AddrXRef and replace it with a new correct one.
From the TopLink Developer's Guide[1]:
When you tell TopLink that a relationship is privately owned, you are specifying that:
* If the source of a privately owned relationship is deleted, then delete the target.
* If you remove the reference to a target from a source, then delete the target.
--Shaun
[1] http://www.oracle.com/technology/products/ias/toplink/doc/10131/main/_html/uowbas007.htm#i1134011