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    <p>I would caution against taking this approach. An OSGi framework can contain multiple providers or versions of a package. Trying to make a unified class loader that correctly copes with this is not trivial. However if you want to query the packages being exported you have two options depending on which version of OSGi you are using.</p> <p>If you are using OSGi prior to OSGi R4.3 you can use <a href="http://www.osgi.org/javadoc/r4v42/org/osgi/service/packageadmin/PackageAdmin.html" rel="nofollow">PackageAdmin</a>. This is a service registered in the service registry that allows you to query what packages are exported by bundles in the framework. Of specific interest to you will be the <a href="http://www.osgi.org/javadoc/r4v42/org/osgi/service/packageadmin/PackageAdmin.html#getExportedPackage%28java.lang.String%29" rel="nofollow">getExportedPackage</a> method. This allows you to select a provider of the package and then you can call loadClass on the bundle that provides the package.</p> <p>PackageAdmin is deprecated in R4.3 (although equinox still implements it). This is more complicated. To do what you desire you need to make use of the new <a href="http://www.osgi.org/javadoc/r4v43/org/osgi/framework/wiring/BundleWiring.html" rel="nofollow">BundleWiring</a> API. This involves getting hold of each bundle in the system and do the following:</p> <pre><code>BundleWiring bw = bundle.adapt(BundleWiring.class); List&lt;BundleCapability&gt; capabilities = bw.getCapabilities(BundleRevision.PACKAGE_NAMESPACE); for (BundleCapability bc : capabilities) { String pkg = bc.getAttributes().get(BundleRevision.PACKAGE_NAMESPACE); } </code></pre> <p>in this you case need to cope with multiple providers and select the correct one. Working out the correct one is the hard part.</p>
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    1. POOSGI: asking Framework to load class exported by a bundle without visiting each bundle's classloader?
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    1. COThanks for the input guys. I'm sorta figuring I should go for the Services route, where the Activator of each bundle should be registering the services it can provide. I just have to convince my boss that a little more work from the developers will give us a lot less headaches. :) Thanks again!
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    2. COJust tried the BundleWiring piece and it's not that hard... We're going to enforce our developers to make unique package names, so this might just work for me. Thank you soo much!
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