Description Istvan Ballok 2010-08-19 14:00:24 EDT

Created attachment 177033 [details]
an RWT code snippet to reproduce the problem

Creating and disposing a TableColumn results in an ArrayIndexOutOfBoundsException,
if all the items of the Table were not updated after creating the column by e.g. calling TableItem#setText(int, string)

Although it could be disputed, how meaningful this is - this problem is the gist of a bug that we had in our application; 
However, the AIOOB exception at runtime is certainly not the expected behaviour.

Please find the attached snippet to reproduce the problem.

Hint:
When disposing the column, the column is destroyed in the table (see Table#destroyColumn(TableColumn)) that removes the corresponding cell data from the table items (see TableItem#removeData(int)).
The problem is that the TableItem#data Data[] array's length was not adjusted when the column was created and hence the precondition of the #removeData method is not met: the data array does not contain the index-th element that is to be removed.

Note: the TableItem#data array's length is adjusted e.g. in TableItem#setText(int, String) by calling TableItem#ensureData(int, int).

In accordance with that, this problem happens only if e.g. TableItem#setText(int, string) is not called on all the TableItems in the Table after the new column was created and before it is disposed.

Note: SWT on win32 does not have any problems with this snippet.