Description Eike Stepper 2010-07-06 06:51:31 EDT

Cloned from: 300149: Support remote cross referencing with a convenient API on the client and SPI on the server for the stores to implement
https://bugs.eclipse.org/bugs/show_bug.cgi?id=300149

It would be great to extend CDO with the possibility to query all the objects referencing a certain object. The so-called crossreferencing (or xref) functionality. 

Using the model available on the server it is possible to determine for each EClass what queries are needed to retrieve the referencing objects.

A thing to consider is how to handle larger volumes of referencing objects. It is clearly possible that multiple queries are needed to retrieve all cross referencers so it can be difficult to implement paging or sublist behavior. So maybe the client api can pass in a max number of returned objects.

To support xref I think we need:
- an api and convenience method on the client
- a server side api definition 
- implementation of this functionality in each store

Eike and others let me know if you have any comments or feedback on this. 

Thanks!

Martin T.