<Swing Dev> Review request for 6894632: Removing rows from a DefaultTableModel with a RowSorter deselectes last row

[Semyon Sadetsky]

Hello,

Please review the fix: 
http://cr.openjdk.java.net/~alexsch/semyon-sadetsky/6894632/webrev.01/
for bug: https://bugs.openjdk.java.net/browse/JDK-6894632

The thing is the sorter logic uses its internal data structures to 
restore selection when the table model has been changed.
For performance reason this internal data is created only upon the table 
sort call. If sortable JTable is initialized with no sort order 
specified the table sort is not executed and table remains unsorted as 
JTable without sorting capability.
When the model of table in such state is changed the corresponding event 
handler logic still called the sorter to transform selection. But since 
the sorter internal cache was empty the transformation failed in cases 
when the selection index exceeds the new table rows count.
Now with the fix the sorter is updated with table model change event 
only if the table is really sorted.