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Bug 209683

Summary:	[prov] API - querying unique IU's in a repo
Product:	[Eclipse Project] Equinox	Reporter:	Susan McCourt <susan>
Component:	Incubator	Assignee:	equinox.incubator-inbox <equinox.incubator-inbox>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	P3	CC:	john.arthorne, pascal
Version:	3.4
Target Milestone:	3.4 M4
Hardware:	PC
OS:	Windows XP
Whiteboard:
Bug Depends on:	209992
Bug Blocks:

Description Susan McCourt

2007-11-13 13:49:34 EST

I am trying to find a way to query an array of IU's that represent the uniquely id'ed IU's in a repo.  The use case is that I want to show the user a list of IU's that are available for install that are version-independent.  The UI will then choose the latest compatible one for them, or alternatively they can expand the list to see the individual versions that are available.

A further complication is that I might be applying an additional query such as only group IUs.  

As far as I can tell, I have to query all of the IU's in a repo and then select only the unique id's.  I don't mind doing this, but it means I'm dragging down a bunch of info about all of the IU's from the repo when all I really want to know is what id's are out there, and I'll query the rest when I need it.

Is there already a way to do this?
If not, I think we should consider making this possible.  See also bug #209549

Comment 1 Susan McCourt

2007-11-14 16:13:39 EST

After a lengthy discussion with John and Pascal, we've decided that:
- The IQueryable interface needs review and possibly more flexibility, but that is not urgent for M4.
- For the UI to get what it needs, it should define an interface like a queryable, but including some of the richer queries it needs such as:

* query for the latest version rather than a particular version (this solves the issue of getting unique ID's, also)
* query for matching property values (might not be needed if categories are expressed as a capability)
* possibly support richer expressions rather than a boolean indicating whether something is an AND or not

John will look at IQueryable some other time and we may push some of these UI-defined queries down into IQueryable.

Comment 2 Susan McCourt

2007-12-04 16:47:51 EST

This was fixed by the new query API and the LatestIUVersionCollector.