[cdi-dev] [JBoss JIRA] (CDI-271) Provide a way to inject Event metadata into an observer method

Arne Limburg (JIRA) jira-events at lists.jboss.org
Wed Sep 26 09:49:03 EDT 2012

Arne Limburg created CDI-271:

             Summary: Provide a way to inject Event metadata into an observer method
                 Key: CDI-271
                 URL: https://issues.jboss.org/browse/CDI-271
             Project: CDI Specification Issues
          Issue Type: Feature Request
          Components: Events
            Reporter: Arne Limburg

Currently there is no way for observer methods to access the qualifiers of the fired event (i.e. to access @Nonbinding members).
Consider the following example:
@Inject @MyQualifier
Event<MyObject> event;

public void fireEvent(MyObject object, MyTypeValue type) {
    event.select(new MyTypeAnnotationLiteral(type)).fire(object);
Currently no observer can receive the value of MyTypeValue. I suggest to introduce an interface AnnotatedEvent that extends Annotated and contains this information. It then could be injected via the InjectionPoint like this:
public void observeEvent(@Observes @MyType MyObject object, InjectionPoint ip) {
    MyType annotation = ip.getAnnotated().getAnnotation(MyType.class);
    MyTypeValue value = annotation.value();

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