ClassLoaderJavaClassDescription.isA does not work under certain circumstances
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Key: FELIX-2486
URL: https://issues.apache.org/jira/browse/FELIX-2486
Project: Felix
Issue Type: Bug
Components: Maven SCR Plugin
Affects Versions: maven-scr-plugin-1.4.4
Reporter: Felix Meschberger
Assignee: Felix Meschberger
Fix For: maven-scr-plugin-1.4.6
Consider two bundles B1 and B2. B1 provides an abstract component AC1. This
abstract component declares itself to implement Service S by means of
@scr.service interface="S"
No AC1 does not itself implement S but it extends a baseclass which in turn
implements S.
This bundle B1 builds perfectly and the SCR plugin generates the descriptor for
the abstract component.
Now, B2 provides a concrete component CC2 extending AC1. B2 fails to build
while trying to generate the SCR descriptor.
The reason for this is, that while generating descriptor for CC2, the exsting
service descriptor for AC1 is validated, particularly the service element. This
element is checked in the context of the abstract AC1 component class
internally represented by a ClassLoaderJavaClassDescriptor instance. To verify
the interface, the isA(String) method is called.
This is where the problem occurrs: The ClassLoaderJavaClassDescriptor.isA
method only considers the interfaces directly implemented by the class but not
any interfaces implemented by the parent class. Moreover, this implementation
does not allow for classes (as opposed to interfaces) to be used as service
interface name.
The fix is probably to use Class.isAssignableFrom to implement the isA method.
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