HGSortedSet<E> write() {
List<LogEntry> log = txManager.getContext().getCurrent().getTopLevel().getAttribute(S);
if (log == null) // should we copy-on-write?
{
HGSortedSet<E> readOnly = S.get(); // S.getForWrite();
HGSortedSet<E> writeable = cloneSet(readOnly);
S.put(writeable);
}
return S.get();
}
HGSortedSet<E> read() {
return S.get();
}