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File Path to jar inside another jar [message #904563]

Tue, 28 August 2012 13:30

Eclipse User

Hi y'all

For an Eclipse plugin, I need to refer to a jar file inside the plugin directory (to provide code to users). This works perfectly when running the plugin while developing (inside a runtime-eclipse-application).

But when I build an update site, my plugin is built into a jar file. File paths for images are still working, but when the jar should be imported, eclipse shows the following error:

Description Resource Path Location Type The container 'DoodleDebug' references non existing library 'file:\C:\Users\Me\.eclipse\org.eclipse.platform_3.7.0_740800064\plugins\ch.unibe.scg.doodledebug_1.0.0.201208281642.jar!\DoodleDebug-Client.jar'

The outer jar path is correct and when inspecting it with WinRAR, I can see the desired jar file inside it!

Why isn't this working as expected?

Cheers
Cedric

Re: File Path to jar inside another jar [message #904938 is a reply to message #904563]

Wed, 29 August 2012 08:18

Eclipse User

What does your manifest look like?

You should have something that looks like:

Bundle-ClassPath: lib/com.foo.jar,
 .

Including the '.' on a separate line is important.

JD

Re: File Path to jar inside another jar [message #905001 is a reply to message #904938]

Wed, 29 August 2012 10:37

Eclipse User

Thanks for your reply, but I could solve it now:
I had to set

Eclipse-BundleShape: dir

in my MANIFEST.MF (directly in source code) and set a tick at

Unpack the plug-in archive after the installation

under the tab "Plug-ins", so my plugin is installed in an exploded form instead of in an archive.
Directly refer to a jar inside another one seems to be impossible.

Cheers
Cedric

Re: File Path to jar inside another jar [message #905474 is a reply to message #905001]

Thu, 30 August 2012 08:51

Eclipse User

Glad its working and good to know Wink

Re: File Path to jar inside another jar [message #906047 is a reply to message #905474]

Fri, 31 August 2012 10:13

Eclipse User

Nested Jars are not supported. We can request files from inside a plug-in, but there is no ability to extract context from a jar inside a jarred plug-in. The solution we have traditionally used is the one Cedric suggests last, changing the plugin shape to be a directory.

Depending on your use case, it is possible to extract data from the jar file, but you must do so manually (explode it into a temporary directory then extract the necessary files yourself).

Re: File Path to jar inside another jar [message #906103 is a reply to message #906047]

Fri, 31 August 2012 12:13

Eclipse User

But I could use Images from within the plugin jar, or does eclipse create some kind of a virtual copy when using

ImageDescriptor.createImage()

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