private void purge(final Folder folder, final SearchFilter filter) throws Exception {
final int num = folder.getChildFolderCount();
if (includeSubfolders && num > 0) {
final FolderView folderView = new FolderView(num);
final FindFoldersResults children = folder.findFolders(folderView);
for (final Folder child : children) {
purge(child, filter);
final ItemView view = new ItemView(1);
if (child.findItems(view).getTotalCount() == 0) {
child.delete(DeleteMode.HardDelete);
}
}
}
while (deleteItems(folder, filter)) {}
}
