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https://issues.apache.org/jira/browse/FELIX-4296?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Carsten Ziegeler resolved FELIX-4296.
-------------------------------------
Resolution: Fixed
I've added a check distinguishing between the empty array and not providing a
value in rev 1613113
> Cannot deactivate service interface detection in DS annotations
> ---------------------------------------------------------------
>
> Key: FELIX-4296
> URL: https://issues.apache.org/jira/browse/FELIX-4296
> Project: Felix
> Issue Type: Bug
> Components: SCR Tooling
> Affects Versions: scr generator 1.10.0, scr ds annotations 1.2.4
> Reporter: Serge Huber
> Assignee: Carsten Ziegeler
> Fix For: maven-scr-plugin 1.17.2, scr ant task 1.11.2, scr
> generator 1.10.2, scr ds annotations 1.2.6
>
>
> I am trying to use DS annotations to declare an extender, and I have the
> following annotation and class definition in order to prevent declaring a
> service with a SynchronousBundleListener interface :
> @Component(service={})
> public class ExtenderBundleListener implements SynchronousBundleListener {
> According to the DS annotation specification this is value, as is illustrated
> from the javadoc :
> /**
> * The types under which to register this Component as a service.
> *
> * <p>
> * If no service should be registered, the empty value
> * <code>{}</code> must be specified.
> *
> * <p>
> * If not specified, the service types for this Component are all the
> * <i>directly</i> implemented interfaces of the class being annotated.
> *
> * @see "The service element of a Component Description."
> */
> Class< ? >[] service() default {};
> Unfortunately this doesn't work, as it seems that the annotation parser
> transforms the {} value into "null" so the following code in the DS
> annotation processor doesn't work as expected :
> final List<String> listedInterfaces = new ArrayList<String>();
> if (cad.getValue("service") != null) {
> final String[] interfaces = (String[]) cad.getValue("service");
> for (final String t : interfaces) {
> listedInterfaces.add(t);
> }
> } else {
> // scan directly implemented interfaces
> this.searchInterfaces(listedInterfaces,
> scannedClass.getScannedClass());
> }
> This is a bit problematic to solve because we would need to differentiate
> between the null and empty case, but it seems that this is somehow not
> supported by the annotations parser ?
> For the moment I worked around the problem by using the following annotation,
> but it's rather ugly since it still generates a service that is not needed :
> @Component(service={ExtenderBundleListener.class}, immediate = true) //
> ideally we would like to not specify any service but it's seems that due to a
> bug in the DS annotation processor this is not possible so we use the
> immediate setting instead
> public class ExtenderBundleListener implements SynchronousBundleListener {
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