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Re: [pde-ui-dev] plugin classpath ...
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Are we addressing a development time issue here or a runtime issue?
Runtime does not resolve JDT classpath variables.
But using Bundle-ClassPath: external:$GWT_HOME$/gwt.jar
should work as long as the java system property GWT_HOME is set when the
framework is launched, not a JDT classpath variable.
None of this will of course work at development time if they are exporting
packages from gwt.jar because PDE will not understand the external: stuff
and will not find the jar to add to other bundles classpaths when they
import/require.
There is no push from our runtime friends for the tooling (PDE) to support
external:, so it is relatively a low priority as far as PDE development
goes.
Wassim.
"Neil Bartlett"
<neil@integility.
com> To
Sent by: "Eclipse PDE UI developers list."
pde-ui-dev-bounce <pde-ui-dev@xxxxxxxxxxx>
s@xxxxxxxxxxx cc
Subject
07/26/2006 10:57 Re: [pde-ui-dev] plugin classpath
AM ...
Please respond to
"Eclipse PDE UI
developers list."
<pde-ui-dev@eclip
se.org>
TG,
The example given in the RCP book states that, on the MANIFEST.MF
Bundle-ClassPath entry, you can replace "jdbc.jar" with
"external:$JDBC_HOME$/drivers/jdbc.jar", where JDBC_HOME is either an
environment variable or a system property. Unfortunately it won't work
with JDT classpath variables - anyway these are set too late for the
bundle resolver.
If the gwt.jar only needs to be used from one plugin then you could
just create your own URLClassLoader in order to load classes from it.
Those classes won't be exportable to other bundles, though.
Regards
Neil
On 7/26/06, TG. <techieguy@xxxxxxxxx> wrote:
> Neil,
>
> I'm developing a plugin for Google Web Toolkit and I can't
> redistribute gwt's jar files due to license restriction. The user will
> download it from Google's site and set the GWT_HOME classpath variable
> in his Eclipse and I'll can obtain the jar file's absolute location
> thru that variable. Since I get the actual location only during
> runtime, I can't put it in the manifest file. Is there a way we can
> programmatically modify the classpath?
>
> - TG.
> --
> www.googlipse.com
> An Eclipse plugin for Google Web Toolkit (GWT)
>
> On 7/26/06, Neil Bartlett <neil@xxxxxxxxxxxxxx> wrote:
> > Hi TG,
> >
> > In general the answer is "don't". Decoupling the metadata of a plugin
> > from its physical location can be problematic and should be avoided
> > wherever possible.
> >
> > Having said that, the Equinox implementation recognizes that this is
> > not always possible, for example where a JAR such as a JDBC driver
> > must be shared with another application, or if that JAR cannot be
> > moved or modified either for technical or license reasons. In that
> > case you can import it using the "external:" modifier.
> >
> > For details see section 20.4 (Bundling by Reference) in the RCP book,
> > or this post on EclipseZone:
> > http://www.eclipsezone.com/eclipse/forums/t63085.html
> >
> > Kind regards,
> > Neil
> >
> > On 7/26/06, TG. <techieguy@xxxxxxxxx> wrote:
> > > Hi,
> > >
> > > How do I add a jar file in the user's system (either thru full
> > > path or thru classpath variable) to the classpath of my plugin?
> > >
> > > TG.
> > >
> > > --
> > > www.googlipse.com
> > > An Eclipse plugin for Google Web Toolkit (GWT)
> > > _______________________________________________
> > > pde-ui-dev mailing list
> > > pde-ui-dev@xxxxxxxxxxx
> > > https://dev.eclipse.org/mailman/listinfo/pde-ui-dev
> > >
> >
> >
> > --
> > Neil Bartlett
> > Senior Technical Consultant, Integility Ltd
> > Tel: +44 (0) 20 7043 8328
> > Fax: +44 (0) 20 7043 8329
> >
> > LinkedIn Profile: https://www.linkedin.com/in/neilbartlett
> > _______________________________________________
> > pde-ui-dev mailing list
> > pde-ui-dev@xxxxxxxxxxx
> > https://dev.eclipse.org/mailman/listinfo/pde-ui-dev
> >
> _______________________________________________
> pde-ui-dev mailing list
> pde-ui-dev@xxxxxxxxxxx
> https://dev.eclipse.org/mailman/listinfo/pde-ui-dev
>
--
Neil Bartlett
Senior Technical Consultant, Integility Ltd
Tel: +44 (0) 20 7043 8328
Fax: +44 (0) 20 7043 8329
LinkedIn Profile: https://www.linkedin.com/in/neilbartlett
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