[ovirt-devel] SortedListModel

[Alexander Wels]

On Thursday, May 29, 2014 09:30:31 AM Daniel Erez wrote:
> ----- Original Message -----
> 
> > From: "Alexander Wels" <awels at redhat.com>
> > To: devel at 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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