[cdi-dev] [JBoss JIRA] (CDI-740) Proxy fields can be accessed if they are protected or package private

[Martin Kouba (Jira)]

    [ https://issues.jboss.org/browse/CDI-740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13669753#comment-13669753 ] 

Martin Kouba commented on CDI-740:
----------------------------------

bq. Data classes with public fields would make sense. 

I think that data classes are not supposed to be CDI beans whose lifecycle is managed by the container.

Anyway, if you disallow protected fields you will limit the possibilities of class hierarchies a lot.

I can't think of any  practical reason for package-private fields though. Which of course does not mean there isn't any ;-)

> Proxy fields can be accessed if they are protected or package private
> ---------------------------------------------------------------------
>
>                 Key: CDI-740
>                 URL: https://issues.jboss.org/browse/CDI-740
>             Project: CDI Specification Issues
>          Issue Type: Bug
>          Components: Beans, Contexts, Java EE integration
>         Environment: IBM WebSphere Liberty, Java EE 7.0 Full Platform
>            Reporter: Frigo Coder
>            Priority: Major
>
> CDI detects and rejects proxyable beans if they expose a public field. However protected and package private fields are silently accepted. In the following example the method returns 0 instead of the correct value of 8:
> {code:java}
> @ApplicationScoped
> public class Car {
>     @Inject
>     private Engine engine;
>     public int numberOfEngineCylinders() {
>         return engine.cylinders;
>     }
> }
> @RequestScoped
> public class Engine {
>     protected int cylinders;
>     @PostConstruct
>     public void init() {
>         cylinders = 8;
>     }
> }
> {code}



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