[weld-issues] [JBoss JIRA] (WELD-1131) Weld Proxies (for instance created by Producer-Method) loose Annotations put ontop of Methods of source class
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https://issues.jboss.org/browse/WELD-1131?page=com.atlassian.jira.plugin....
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P Huber commented on WELD-1131:
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You're completely right - if copying the annotations from the produced class to the
proxy then the "gap" is just put to another place in the inheritance
hierarchie.
That would be for a proxied object that annotations of getClass() and
getClass().getSuperclass() are equal, what might be source of some suprise, too ;-)
But actually then this should be documented somewhere and hopefully there's some API
that I can find out if I handle a proxied object or not (same class can be proxied or not
- depends on produce method scope, maybe one time with @RequestScoped and second time with
@Singelton) so that I can handle it straightforward, maybe like: Class<T> c =
BeanManager.getSourceClass(ofProbablyProxiedObject); Is there such a method?
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If I start to think about it on larger context - the problem is inherently there with all
that on the fly proxying - what if I CDI-produce (proxy level 2) a JPA entity (proxy level
1) which is proxied by JPA-Runtime ;-). Probably there should be some Standard on
JEE-level for all those instrumentation/on-the-fly-proxy creating libs that allow a
central API to handle getting the "original" Class back...
Weld Proxies (for instance created by Producer-Method) loose
Annotations put ontop of Methods of source class
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Key: WELD-1131
URL: https://issues.jboss.org/browse/WELD-1131
Project: Weld
Issue Type: Bug
Components: Reflection layer
Affects Versions: 1.1.8.Final
Environment: glassfish 3.1.2
Reporter: P Huber
Assignee: Marko Lukša
Fix For: 2.0.0.Alpha2
Attachments: weld-forgets-annotation_WELD-1131.7z
I have project specific Annotations ontop of public Methods of a class.
class Customer {
@MyProjectSpecificAnnotation
public String getFirstName() {
return firstName;
}
}
When producing Objects of such an annotated class, like with
class Example {
@Produce
Customer producerField;
}
Then at the Injection Side the Annotations "MyProjectSpecificAnnotation" is no
longer available, because WELD injects a byte-code created proxy.
class InjectionSide {
@Inject
Customer injectField; // here we get the WELD-Proxy of unpronouncable name...and no
Annotations
}
I've used BeanIntrospector to reflect the injected Instance of class Customer. I get
a set of PropertyDescriptors with a write/read Method each.
But as allready said, none of them has the "MyProjectSpecificAnnotation".
Could be due to the fact, that when subclassing a class, the Annotations of the super
class are not available at sub class directly - But in Case of a "transparent"
WELD proxy I'd expect they should be there. Probably you have to simply copy
annotations during on-the-fly byte-code creation of the Proxy. The Problem is btw also
true for javas built in Dynamic Proxy: using it you also loose Annotations.
Hope you can fix that
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