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From "Guillaume Nodet (JIRA)" <j...@apache.org>
Subject [jira] Created: (FELIX-1131) ServiceReference.isAssignableTo fails when using a factory that can not see the exported class and the bundle exporting the service does not have a direct wire to this class
Date Thu, 07 May 2009 12:52:30 GMT
ServiceReference.isAssignableTo fails when using a factory that can not see the exported class
and the bundle exporting the service does not have a direct wire to this class
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------

                 Key: FELIX-1131
                 URL: https://issues.apache.org/jira/browse/FELIX-1131
             Project: Felix
          Issue Type: Bug
          Components: Framework
    Affects Versions: felix-1.6.0
            Reporter: Guillaume Nodet


 * bundle A defines an interface R and a class S in different packages, whith S implementing
R
 * bundle B defines a class T extending S, it has an import statement on S package, but not
on R package
 * bundle C defines a ServiceFactory that export T service without any import on any package
from R, S, T

in this case, the line 426 of ServiceRegistrationImpl is executed:

                       allow = getServiceRegistration().isClassAccessible(requestClass);

which looks like:

   protected boolean isClassAccessible(Class clazz)
   {
       try
       {
           // Try to load from the service object or service factory class.
           Class sourceClass = (m_factory != null)
               ? m_factory.getClass() : m_svcObj.getClass();
           Class targetClass = Util.loadClassUsingClass(sourceClass, clazz.getName());
           return (targetClass == clazz);
       }
       catch (Exception ex)
       {
           // Ignore this and return false.
       }
       return false;
   }

So felix checks if the classloader used to load the factory can also load the interface, which
is not the case in my example.
So isClassAccessible returns false and the event is not dispatched to the service listener.

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