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[equinox-dev] Require system.bundle question


In https://bugs.eclipse.org/bugs/show_bug.cgi?id=463292 we are trying
to solve the issue that javax.annotations from the Java installation
should be used if a Java 7 runtime is available. If a Java 6 runtime
is used, then the javax.annotations implementation provided by the
plug-in should be used.

For this we added: "Require-Bundle: system.bundle" to the MANIFEST.MF.

This seems to work. If Java 7 is used as runtime, the
javax.annotations from the Java installation is exported by the
plug-in. And if Java 6 is used the implementation classes from the
plug-in are used.

So my question is: is it assured that the system.bundle classes always
get priority (if available) over the plug-ins implementation?

Or was the observed behavior pure luck and the order of which
implementation is exported is not defined by OSGi / Equinox?

Thanks for the answer. I'm not sure if I was able to describe the
question well enough.

Best regards, Lars

Eclipse Platform UI and e4 project co-lead
CEO vogella GmbH

Haindaalwisch 17a, 22395 Hamburg
Amtsgericht Hamburg: HRB 127058
GeschÃftsfÃhrer: Lars Vogel, Jennifer Nerlich de Vogel
USt-IdNr.: DE284122352
Fax (040) 5247 6322, Email: lars.vogel@xxxxxxxxxxx, Web: http://www.vogella.com