[samigo-team] review/testing request: SAM-1615

[David Horwitz]

Hi All,

A request for review/testing of work on this issue:

https://jira.sakaiproject.org/browse/SAM-1615

Currently this is in the SAM-1615 branch.:

This consists of turning the objects used in the grading/delivery stack 
from Interface + implementation into POJO's which override Objects 
equals and hashcode methods. I have tried to keep the changes as minaly 
disruptive as possible however a fair amount of code was touched.

The upside of this is that the number of update queries when moving from 
page to page in delivery is seriously reduced.

Currently when moving from page to page the following update/inserts are 
issued:

1) update on AssesmentGradingData
3) insert on ItemData for questions on the page (if their new otherwise 
updates)
4) Updates on ItemData for all questions answered


With this fix the updates in 4 are removed - i.e. redundant updates are 
removed.