[mylyn-integrators] Getting old attribute values on task submission

["Robert Munteanu" <robert.munteanu@xxxxxxxxx>]

Hi all,

For the connector I'm contributing in
(http://mylyn-mantis.wiki.sourceforge.net/) task relations can only be
updated by calling separate delete_relation and add_relation SOAP
methods.

I'd like to avoid invoking those methods unless the values have
changed, and would like to be able to either receive a 'delta' of
those values or be able to compute the 'delta' myself.

AbstractTaskDataHandler.postTaskData does have a Set<TaskAttribute>
oldAttributes parameter which seems to be what I need, but it its
value is always null.

Am I missing something? Alternatively, is there any other manner of
finding out whether the value of an attribute has changes?

Thank you,

Robert