You actually _can_ leave the unannotated version and still get what you want, but you need to delve a bit more into Guice's API and use the toConstructor binding. The issue here is what's called the "Turkey Bacon" problem and is described @ http://tinyurl.com/turkeybaconproblem . The fixed issue @ http://code.google.com/p/google-guice/issues/detail?id=231 describes it in a little detail. Coment 8 in that issue should give some idea how to resolve this for yourself -- basically you bind OneOfEach as a singleton itself, bind @A OneOfEach using toConstructor(..).in(Singleton.class), and same with @B. Doing it this way should avoid the need for the error checking (which I'm not sure would be possible without some fun use of the Guice SPI.)
sam On Thu, Aug 18, 2011 at 2:45 PM, glenviewjeff <[email protected]>wrote: > Sam, thanks so much for the great (and understandable explanation.) > > It was, in fact, the case that I did wish the unannotated versions to be > singletons as well, but to be a different singleton than the two annotated > ones. I now understand how and why this doesn't work with Guice, and it's > really not a big deal to just create a third annotation and never inject > unannotated OneOfEachAnnotation classes. > > That having been said, I have a follow-up question if you don't mind: Is > there a mechanism to require annotations so I don't inadvertently do so? > > Thanks, > Jeff > > -- > You received this message because you are subscribed to the Google Groups > "google-guice" group. > To view this discussion on the web visit > https://groups.google.com/d/msg/google-guice/-/wEXSWcM1hI4J. > > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-guice?hl=en. > -- You received this message because you are subscribed to the Google Groups "google-guice" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-guice?hl=en.
