resolve first and last row in the af:table using varstatus

During my current project i've been asked about rendering a button for first and last row in a table. There is very simple way to achieve that without a single line of Java code. The keyword to the success is varStatus. I've prepared simple application where on the testPage i've drag&dropped sortable and filterable read only table. Also i've added few columns where varStatus properties are displayed.

What can be noticed here:

• begin always returns 0, it's the index of first element in the collection
• count returns the number of objects in the collection for the current step
• current returns the reference to the current row (in the iterators loop)
• end is supposed to return index of the last element - unfortunately it returns null
• last is supposed to return true for the last element and false otherwise, it's null (see bug: varStatus.last working?)
• index returns row index, could be used to display order number value for each row as #{vs.index+1} because it starts from 0
• step is always 1 - each row from the collection should be displayed

OK, so what needs to be done to properly point the last row? Just small and simple trick:

You need to compare current row index with row count in the collection #{bindings.TheNameOfTheIterator.estimatedRowCount==vs.index+1}. The screenshots above presents filtered collection. Filtering and sorting don't corrupt the solution.

Please notice that varStatus is not only related with <af:table> but also with other components like <af:iterator> or <af:forEach> and its attribute set (and returned values) may differ there.