Dan, Good point. After considering I decided to modify my interface to expose the function I need and let the implementation worry about casting where necessary.
Thanks, Daniel On Tue, Jul 23, 2013 at 9:58 AM, Dan Retzlaff <dretzl...@gmail.com> wrote: > @Inject the implementation, not the interface. @Inject'd implementations > have some code smell, but no more than downcasting. > > > On Tue, Jul 23, 2013 at 8:40 AM, Daniel Watrous <dwmaill...@gmail.com > >wrote: > > > That being the case, is there any way to get an instance that I can cast > to > > a concrete type? > > > > > > On Tue, Jul 23, 2013 at 9:27 AM, Martin Grigorov <mgrigo...@apache.org > > >wrote: > > > > > Hi, > > > > > > > > > On Tue, Jul 23, 2013 at 6:20 PM, Daniel Watrous <dwmaill...@gmail.com > > > >wrote: > > > > > > > Hi, > > > > > > > > I'm having an issue that I suspect is related to the wicket > integration > > > > with Guice. Any help is appreciated. > > > > > > > > I have a Page class that uses field injection to inject a DAO. I then > > > want > > > > to cast my DAO to a more specific type (what I inject is the > > interface). > > > > Here's what that looks like > > > > > > > > public class CnavModify extends ConsoleBasePage { > > > > > > > > @Inject private CnavUrlDAO cnavUrlDAO; > > > > public CnavModify(PageParameters parameters) { > > > > super(parameters); > > > > if (parameters.get("cnavid").toString() != null) { > > > > cnavid = new > ObjectId(parameters.get("cnavid").toString()); > > > > } > > > > if (cnavid != null) { > > > > cnavUrlModel = new > > > > > > > > > > > > > > DetachableCnavUrlModel(((MorphiaCnavUrlDAO)cnavUrlDAO).getCnavById(cnavid)); > > > > } > > > > } > > > > } > > > > > > > > When I try to cast it I get the following error: > > > > > > > > Last cause: $Proxy23 cannot be cast to > > > > com.hp.honeybadger.persistence.dao.morphia.MorphiaCnavUrlDAO > > > > > > > > I am able to use the CnavUrlDAO as a CnavUrlDAO, but its type is > > $Proxy23 > > > > and I am unable to cast it to a concrete type. > > > > > > > > Is this Guice or Wicket related? Any idea how to get around this? > > > > > > > > > > It is an error in your assumption. > > > > > > Wicket injects a proxy that implements CnavUrlDAO but knows nothing > about > > > the specific implementation about this interface. > > > Whenever the proxy is used it delegates the call to the bean/service > > > returned by Guice's injector (something like: > > > Injector.getBinding(CnavUrlDAO.class).doSomething()). > > > > > > > > > > > > > > Thanks, > > > > Daniel > > > > > > > > > >