I am building an Eclipse plug-in that provides a set of core features in the regular plug-in project. The optional features I am providing via fragment projects. But I need the fragments to register themselves with the main plug-in on start-up.
I cannot have a Bundle-Activator in the fragment project. So I am wondering is there some alternate mechanism to declare an entry point or some call-back that I can hook?
And if there is no alternative other than converting the fragment project to a regular plug-in project is there a downside that I need to be aware of?
This is the solution I used based on the accepted answer:
final IExtensionRegistry registry = Platform.getExtensionRegistry();
final IExtensionPoint extensionPoint = registry.getExtensionPoint("myextensionid");
final IExtension[] extensions = extensionPoint.getExtensions();
for (int j = 0; j < extensions.length; ++j)
{
final IConfigurationElement[] points = extensions[j].getConfigurationElements();
for (int i = 0; i < points.length; ++i)
{
if ("myelementname".equals(points[i].getName()))
{
try
{
final Object objImpl= points[i].createExecutableExtension("class");
objImplList.add(provider);
}
catch (CoreException e)
{
}
}
}
}
You could define an extension point and lookup/call your fragment classes via extensions.
EDIT:
You shouldn't have to. For example, in my test code, I have the following files in the host plugin:
META-INF/MANIFEST.MF:
plugin.xml:
The fragment contains these files:
META-INF/MANIFEST.MF:
fragment.xml:
These projects were generated using Eclipse 3.3.1.1.