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Re: [p2-dev] Error in the p2 workspace; org.eclipse.equinox.p2.jarprocessor missing export

There is a little bit about this in the help:
http://help.eclipse.org/helios/index.jsp?topic=/org.eclipse.platform.doc.isv/guide/ant_developing.htm

Essentially, the classes that are part of the ant tasks should not be visible to the osgi class loader.  This is because we need need the classes to get loaded by the ant classloaders, otherwise at runtime you can get ClassCastExceptions.

It can be very confusing and frustrating trying to debug a problem and getting exceptions casting org.apache.tools.ant.Project to org.apache.tools.ant.Project.  :)

-Andrew


From: Pascal Rapicault <pascal@xxxxxxxxxxxx>
To: P2 developer discussions <p2-dev@xxxxxxxxxxx>
Date: 03/28/2011 04:40 PM
Subject: Re: [p2-dev] Error in the p2 workspace;        org.eclipse.equinox.p2.jarprocessor missing export
Sent by: p2-dev-bounces@xxxxxxxxxxx





This is PDE acting up, the .ant packages should not be exported since they are not meant to be used by any other type and just be made available through the Ant tasks.

On 2011-03-28, at 3:46 PM, Dahanne, Anthony wrote:

> Hello all,
> So every time I check out P2 fresh from source (following those
> instructions :
>
http://wiki.eclipse.org/Equinox_p2_Getting_Started_for_Developers ) I
> can't help but notice that there is this annoying error :
>
> JarProcessorTask cannot be resolved to a type
> /org.eclipse.equinox.p2.repository.tools/src_ant/org/eclipse/equinox/p2/
> internal/repository/tools/tasks                 line 61                 Java Problem
>
> This is due to the fact that the manifest of
> org.eclipse.equinox.p2.jarprocessor does not export
> org.eclipse.equinox.internal.p2.jarprocessor.ant .
>
> What I usually do, is that I export  this
> org.eclipse.equinox.internal.p2.jarprocessor.ant from
> org.eclipse.equinox.internal.p2.jarprocessor , but I was wondering if
> maybe something was made on purpose here...
>
> As usual, thanks for help !
>
>
>
> Anthony Dahanne
> Software Developer
> Compuware Montreal
> 75 Rue Queen, Suite 6500
> Montreal, QC, Canada H3C 2N6
> 514-281-1100 x1173 Direct
>
>
>
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