images

[Mark Reinhold]

> Date: Mon, 15 Mar 2010 11:23:52 -0700
> From: jonathan.gibbons at sun.com

> Mandy Chung wrote:
>> On 03/15/10 07:31, Jonathan Gibbons wrote:
>>> jmod might give me what I want -- I can check the file system to see if jmod
>>> exists, and if it does, I can then exec it query for specific modules.

Yes, that's what I'd have suggested.

You could also use reflection to load the org.openjdk.jigsaw.Library
class, and if that's successful then open the system default library
and query it.

Either way, beware of interface shimmer over the coming months.

>> What exactly do you need to find out from a given image?  How is the info
>> being used?
> 
> Mostly, I'm just trying to think ahead for jtreg.   When presented with an
> image, it needs to determine whether it can support compilation. In the past,
> this was done by poking around for "jre/" and "tools.jar" and stuff like that.
> Those may not exist in future, so I was trying to figure out what jtreg might
> do.  Note in particular that I would like jtreg to remain somewhat version
> neutral, for versions >= 1.5. i.e the same copy of jtreg should work for
> running tests on 1.5 or later.

Completely agree -- thanks for thinking ahead about this.

- Mark