Hey!
On 16/Sep/2010, at 7:34 AM, ISHIMOTO Ken wrote:
> Hi all, was a nice WOWODC, and really nice Job done Pascal.
Glad to hear that WOWODC was fun... Too bad I missed it. OTOH, I head for
Germany this weekend for my first european vacation so that's where my time off
is going this year. ;-)
> I have a small Problem about NSDictionary.
> NSArray<Movie> movies=
> Movie.fetchAllMovies(defaultEditingContext());
> EOEnterpriseObject eo = movies.objectAtIndex(0);
> NSDictionary pDic =
> EOUtilities.primaryKeyForObject(defaultEditingContext(), eo);
> System.err.println("1:" + pDic); -->1:{movieID = 102; }
> System.err.println("isEmpty:" + pDic.isEmpty()); -->isEmpty:true
> System.err.println("count:" + pDic.count()); -->count:1
> Hadn't isEmpty not to be false ?
I tried to reproduce your problem with a non-wonder app and could not. I was
able to reproduce it with a Wonder app.
> Also looking into isEmpty
> public int count() {
> return _count;
> }
> public boolean isEmpty() {
> System.err.println("_count : " + _count); -->_count : 0
> System.err.println("count() : " + count()); -->count : 1
> return _count <= 0;
> }
> Why is the result of _count and count() different?
> Any ideas what's going wrong?
This was the part that really confused me until, I looked at this:
System.err.println("pDic.getClass().getName() = " + pDic.getClass().getName());
and I see:
pDic.getClass().getName() =
com.webobjects.eocontrol._EOMutableKnownKeyDictionary
So, primaryKeyForObject() is returning a private subclass.
And that subclass has it's own _count ivar.
However it does not have an implementation of isEmpty() so it's inheriting the
one from NSDictionary.
Now, that's the WONDER version of NSDictionary. And it's using it's own _count
ivar. :-(
The fix is to change NSDictionary.java's isEmpty() method to be:
public boolean isEmpty() {
return count() <= 0;
}
For the record, size() should be changed as well!
And perhaps others, but I don't have unit tests for NSDictionary so I'm not
changing anything! ;-)
Good luck!
M.
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