[
https://issues.jboss.org/browse/CDI-178?page=com.atlassian.jira.plugin.sy...
]
Pete Muir updated CDI-178:
--------------------------
Summary: Require container-provided Producer implementation to use
getInjectionPoints() (was: Require container-provided InjectionTarget implementation to
use getInjectionPoints())
Issue Type: Clarification (was: Feature Request)
Currently the spec doesn't explicitly require the Producer (and it's subclass)
InjectionTarget to use getInjectionPoints to examine the injection point definitions. This
is the intent of the spec, it appears Weld at least doesn't comply with this though.
Require container-provided Producer implementation to use
getInjectionPoints()
------------------------------------------------------------------------------
Key: CDI-178
URL:
https://issues.jboss.org/browse/CDI-178
Project: CDI Specification Issues
Issue Type: Clarification
Components: Portable Extensions
Affects Versions: 1.0
Reporter: Jozef Hartinger
Priority: Minor
Fix For: 1.1 (Proposed)
A CDI extension should be able to turn a field of a into a CDI injection point as easily
as by overriding the getInjectionPoints() method of the container-provided InjectionTarget
implementation e.g.:
{code}
event.setInjectionTarget(decorate(event.getInjectionTarget()));
...
protected <T> InjectionTarget<T> decorate(final InjectionTarget<T>
delegate)
{
return new ForwardingInjectionTarget<T>() {
@Override
public Set<InjectionPoint> getInjectionPoints() {
Set<InjectionPoint> injectionPoints = new
HashSet<InjectionPoint>();
injectionPoints.addAll(super.getInjectionPoints());
injectionPoints.addAll(); // additional injection points
return injectionPoints;
}
@Override
protected InjectionTarget<T> delegate() {
return delegate;
}
};
}
{code}
However, the spec does not require the container-provided InjectionTarget implementation
to make use of the getInjectionPoint() method when creating a new instance. As a result,
the approach above may or may not work.
Therefore, it is currently necessary for a portable extension to also provide an
implementation of at least the inject() method (for field injection points) and implement
the injection itself. This is problematic in 1.0 of the spec since a portable extension
does not necessarily have access to the BeanManager instance of the BDA where the
injection target is deployed, thus different visibility rules apply.
Clarify that the container-provided implementation of the Producer interface should use
the result of the getInjectionPoints() method as a source of information about the
injection points to inject.
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