Re: [p2-dev] Using p2 expression or QL to query all IUs which provide a

[Thomas Hallgren <thomas@xxxxxxx>]

On 02/23/2010 07:25 PM, Thomas Watson wrote:
> This is where I got confused.
>
> everything.select(<some selection expression>).latest()
>
> Here it seems like everything.select(<some selection expression>) 
> would return a collection of IUs. Then the latest() would just go 
> through the collection of IUs regardless of the id and find the one 
> that has the largest version and the result would be a single IU. Does 
> latest() actually pick the latest version of each group of IUs with 
> the same id?
Yes. The latest can only act on instances that implements the 
IVersionedId interface. It will collect the instances in a map keyed by 
id and discard all but the latest version. You got the same result 
before using the LatestIUVersionQuery in a query pipe.

- thomas