Major Description
We currently use a tree visit to deliver PostRestoreStateEvents. By default tree visits will cause iterating components (such as UIData/UIRepeat) to iterate over all visible rows in the model. This results in children being visited once per iteration - and thus PostRestoreStateEvents re-delivered for each row.
An interesting side effect of this is that component binding setters will be evaluated multiple times. For example, in a case like this:
<h:dataTable value="#
{someModel}" var="row">
<h:column>
<h:ouputText binding="bean.foo"/>
</h:column>
</h:dataTable>
The binding setter (eg. setFoo()) is called multiple times (once per row) in 2.0. In 1.2 this was only called one time.
Note that a solution for the following issue:
MYFACES-3036 Support SKIP_ITERATION FacesContext property
Would make fixing this issue simple. The tree visit that we use for PostRestoreStateEvent delivery would simply specify the SKIP_ITERATION hint.