Adam Lally wrote:
On 1/9/07, Thilo Goetz <[EMAIL PROTECTED]> wrote:
I have no problem with that, but it's disappointing. Can you give me
some insight into what the problems are exactly? In a few lines?
Thanks.
I think the main problem is that the UIMA framework OSGi bundle has to
load the JCas cover classes (in the FSGenerators of the CAS). This
basically undermines the OSGi component system. Normally in OSGi,
those classes would only be visible within the class space of the
component's bundle, not the UIMA framework's bundle. There's a
workaround (called "buddy class loading") that allows an OSGi bundle
to be a "buddy" of the UIMA framework bundle and make its class space
accssible. But this does nothing to handle the case where you have
two different definitions of the same class in two different bundles.
I believe that it is possible in OSGi to declare that any group of
bundles should
refer to another bundle's class loader when loading particular things.
So, if
the "merged" type system had JCas cover classes generated, and those were
put into their own "bundle", this would work fine if the using bundles
"depended"
on the type system bundle. Maybe this could be made to work in UIMA;
I'm not sure.
-Marshall
