Hi,

We discussed this very issue in the Security API EG as well. In the Security API the actual type *MUST* be retained as per the spec definition.

The problem in CDI, at least in Weld, is that a proxy is injected. This happens via the build-in bean "PrincipalBean extends AbstractEEBean", where AbstractEEBean does:

public abstract class AbstractEEBean<T> extends AbstractStaticallyDecorableBuiltInBean<T> {

    private final T proxy;

    protected AbstractEEBean(Class<T> type, Callable<T> callable, BeanManagerImpl beanManager) {
        super(beanManager, type);
        this.proxy = new ProxyFactory<T>(beanManager.getContextId(), type, getTypes(), this).create(new EnterpriseTargetBeanInstance(type, new CallableMethodHandler(callable)));
    }
    // ...
}

I'm not even sure if it's possible to downcast the proxy to the required runtime type.

Also note that the Principal can change during the request. The simplest case is when during an http request HttpServletRequest#logout is called.

Kind regards,
Arjan Tijms




On Wed, Apr 26, 2017 at 3:54 PM, John Ament <john.ament@spartasystems.com> wrote:

Hey guys


I raised a bug against the Weld guys, but think its worth an EG discussion.  When a Principal object is injected, the only type it has is Principal.  It does not retain the actual type used at runtime.  This threw me off on some Keycloak integration I'm working on (in $dayjob).  So I was wondering, is this expected from our POV or should it retain the types of the actual runtime instance?


John

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