Re: [ovirt-devel] SortedListModel
On Thursday, May 29, 2014 09:30:31 AM Daniel Erez wrote:
----- Original Message -----
> From: "Alexander Wels" <awels(a)redhat.com>
> To: devel(a)ovirt.org
> Sent: Thursday, May 29, 2014 4:05:13 PM
> Subject: [ovirt-devel] SortedListModel
>
> Hi guys,
>
> I have a question about the SortedListModel. If you look at the
> setItems(Collection<T> value) method. You will notice that eventually all
> the items are added to a SortedSet. This is not a problem if all the
> elements of your collection are different. But what happens if the
> elements of your collection are not all different. More specifically if I
> pass in a comparator that matches on a field of the object that is not
> different like description, or
> size or something of that nature.
>
> The set will reduce the number of elements. Before I change it to be a
> list
> that can have duplicates, I would like to know the origin of the set and
> if
> there are going to be any issues when I do that.
afaik, SortedListModel only maintains a list of business entities,
hence there isn't an issue with duplicate objects (as all displayed
entities are unique). Are you trying to make use of SortedListModel
with a list of strings or something similar?
Well the new sorting infrastructure uses sorted list model with a Comparator.
The Comparator can compare basically any field in the entities. For instance
description. There is nothing stopping descriptions from being the same
between different entities. Now if I use the SortedSet with the Comparator on
description and I have entities with the same description, entities are
disappearing from the result.
> Thanks,
> Alexander
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