Get list of changeset / task by comparing stream & snaps

Hello all,

I was wondering if the following is possible via API/OSLC/Reports

Generate difference between stream/snapsots and a snapsots & get the list of
a. Task
b. Changsets for task
c. Change set without a task
d. files / folders added / deleted /modfied

I can do this (a & b) in eclipse and can view the change sets in Change explorer

What I am looking at is an automated solution

Thanks

Regards
Karthik