Re: [tycho-user] framework extension bundle and rt.jar versus tools.jar

[Justin Georgeson <JGeorgeson@xxxxxxx>]

I've been told by multiple people in the Eclipse and Tycho community that the extension bundle is the Correct way to expose these packages, with these two blog posts being referred to

http://blog.springsource.org/2009/01/19/exposing-the-boot-classpath-in-osgi/

http://blog.meschberger.ch/2008/10/osgi-framework-extension-as-maven.html

I believe there are licensing restrictions for modifying tools.jar and rt.jar, so the framework extension bundle avoids that complication.

-----Original Message-----
From: tycho-user-bounces@xxxxxxxxxxx [mailto:tycho-user-bounces@xxxxxxxxxxx] On Behalf Of Andreas Sewe
Sent: Thursday, August 29, 2013 4:09 AM
To: tycho-user@xxxxxxxxxxx
Subject: Re: [tycho-user] framework extension bundle and rt.jar versus tools.jar

Hi Justin,

> I have a framework extension bundle project in my reactor, and it 
> exports packages from rt.jar (like javax.swing.plaf.swing) and 
> packages from tools.jar (like com.sun.javadoc).

FWIW, we describe an alternative to a framework extension bundle  on our blog [1]; we recently came across this technique

  Bundle-ClassPath: external:$java.home$/../lib/tools.jar
  Export-Package: com.sun.javadoc, ...

and are quite happy with it. Can you please elaborate some more on your framework extension solution? Patrick, a GSoC student, who came up with the above solution for his project might be interested in it.

> Is it a compiler classpath problem?

That being said, at compile time you still have to use <extraClasspathElements> (also explained in the blog post).

Best wishes,

Andreas

[1] <http://www.codetrails.com/blog/osgi-ify-your-tools-jar>

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