View RowSets and their iterators.

Question

I'd like to check my understanding of Views, RowSets and RowSetIterators.
Each ViewObject has a built-in RowSet, others can be created.
Each RowSet has a built-in RowSetIterator, others can be created. In particular, the wizards create one with "Iter" at the end of the name.
ViewObjects and RowSets provide convenience methods for manipulating their built-in RowSet and RowSetIterator.
If I ask for aViewObject.findRowSet(null) I get the default RowSet (and similarly for RowSet.findRowSetIterator(null))?
Now if there's a ViewLink with this ViewObject as the Master, which RowSet and RowSetIterator are used to drive the detail ViewObject? Is it just these default ones or does the ViewLink somehow respond to currency changes in other RowSetIterators?
Which RowSet(s) are affected in the detail ViewObject? All the RowSets or just the default one?
Tony.

Answer 1

Tony:
What happens to the iterators of a Detail RowSet when
its master's default iterator navigates?When the master navigates, the RowSet is re-executed for the new master ==> the RSIs are all reset--positioned at the slot before the first row.
>
If I insert a row into a RowSet, do all the iterators
move currency (this seems to be what's happening)?It depends whether you call insertRow or insertRowAtRangeIndex. If you call the former, the currency is set to the newly inserted row. If you call the latter, the currency is not affected.
>
Example:
We have a many-one ViewLink (master is many, detail
is one) based on a foreign key in the master
ViewObject.
1) We create a new row for the detail ViewObject.
2) We set the master row's foreign-key attribute to
null.
3) We insert the detail row.
4) We set the foreign-key attribute in the master to
the new detail row's primary key.
If we omit step 2 then the detail row gets it's
primary-key value from the master's foreign key which
we don't want. This may be due to an association
between the EntityObjects concerned, rather than a
result of the ViewLink?
Now, we have a panel with controls bound to a named
iterator of the detail view. These controls see the
new detail row as soon as it's inserted even though
we don't manipulate this iterator at all. (This is
what we want, I'd like to understand why/how it's
happening).
When a new row is inserted to a RowSet, events are generated (rowInserted followed by navigated). These events propagate through RSI opened on that RowSet. Controls bound to these RSIs receive the events and refresh their display.
Thanks.
Sung