Custom ICF Connector; Upd ChildTableValues (delete) not sending group name

Question

I'm building a custom ICF connector implemented as a .Net bundle. The UpdateChildTableValues operations for add and update on groups pass the group name into the code but the delete does not. There doesn't seem to be any indication of the operation itself for groups so it seems the developer must handle target group memberships in the code, which is fine. However, if a delete doesn't send the group name, how do I know what group to even look for? It seems this also adds the burden of API calls against OIM to identify the user's group assignments as well as a target search to compare and decide what was removed.
OIM 11gR1 on RHEL 6.4 (64-bit)
11.1.2 Connector Server on Win2K8R2 (64-bit)
.Net 4 target build/C# 4.0

Answer 1

You have 2 options when working with child tables:
1) use ICProvisioningManager#updateChildTableValues -- this provides the list of values after the update, so let's say the attribute has values group1, group2, group3, you remove group1 then the UpdateOp#update with attribute values group2, group3 will be called on your connector (so in this case your connector needs to implement UpdateOp). You are right, it might mean additional target API call in your connector (depending on target).
2) use ICProvisioningManager#addChildTableValue, ICProvisioningManager#updateChildTableValue, ICProvisioningManager#removeChildTableValue -- when you use these methods, the connector will get the changes only. In the previous example UpdateAttributeValuesOp#removeAttributeValues with value group1 would be called on your connector. You connector needs to implement UpdateAttributeValuesOp to make this work.
Tomas