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https://issues.apache.org/jira/browse/ARIES-1341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14610029#comment-14610029
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Michał Woś commented on ARIES-1341:
-----------------------------------
* only fields are scanned
I wanted to point that annotation target specifies 3 possibilities. As far as I
know class level annotation means that a resource is injected when bean is
initialized whereas two others when a resource is referenced (runtime)
* getAnnotation() return null because annotations are proxied (com.sun.proxy)
bean.getClass().getAnnotations() returns proxied objects so instances of
com.sun.proxy.Proxy
that causes that if you call
bean.getClass().getAnnotation(PersistenceContext.class) you will get null
you should call getAnnotations()[i].annotationType()
what's more it appears that classes are loaded by different class loaders so
even if getAnnotations()[i].annotationType() equals PersistenceContext.class in
terms of class names, it doesn't necessarily mean that
getAnnotations()[i].annotationType() == PersistenceContext.class
*Setting persistence fields results in: Can not set
javax.persistence.EntityManager field xxx to com.sun.proxy.$Proxy37
you are injecting proxies: EmSupplierProxy into persistence fields using
reflection. this results in above exception.
I tested using java 8
> JpaBeanProcessor not working in karaf
> -------------------------------------
>
> Key: ARIES-1341
> URL: https://issues.apache.org/jira/browse/ARIES-1341
> Project: Aries
> Issue Type: Improvement
> Components: Blueprint, JPA
> Affects Versions: jpa-2.0.0
> Environment: karaf-4.0.0, java 8
> Reporter: Michał Woś
> Assignee: Christian Schneider
> Fix For: jpa-2.1.0, jpa-2.0.1
>
>
> * getAnnotation() return null because annotations are proxied (com.sun.proxy).
> * only top level class is scanned. super classes are not
> * only fields are scanned whereas target of persistence annotations is: TYPE,
> METHOD, FIELD
> * Setting persistence fields results in:
> Can not set javax.persistence.EntityManager field xxx to
> com.sun.proxy.$Proxy37
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