Code Review Request Bug #7129185:(coll) Please add Collections.emptyNavigableSet()

[Darryl Mocek]

emptyNavigableSet().descendingSet().comparator() returns null.  Isn't 
this what's expected?  The bounds checking should be correct.

Darryl

On Tue 24 Jan 2012 01:29:30 PM PST, Jason Mehrens wrote:
> > > 3. What if I want to create an empty set navigable set with supplied
> > > comparator? Extending is not an option.
> > This is the one issue I wanted to discuss...is this necessary? I was
> > thinking about how this would be implemented. You would need to supply
> > a comparator to the emptyNavigableSet. Other empty* methods don't take
> > parameters and adding a method to supply a comparator would require an
> > additional method.
>
> I think you have little choice but to add the parameter because the 
> current implementation of 
> emptyNavigableSet().descendingSet().comparator() returns the wrong 
> value. Which should mean that the bounds checking is incorrect in the 
> descendingSet too. Am I correct on that? So by adding that feature you 
> don't have to create a special subclass to correctly implement 
> EmptyNavigableSet.
>
> Jason