Add an annotation to your injected variable, like:
@Inject public Client(@YourBindingAnnotation IDrawGraphService service) {
.. }
That tells Guice that when it injects the constructor with variables, it
should inject the graph service that was annotated with that binding
annotation.
sam
On Mon, Jul 19, 2010 at 12:45 PM, Jerem's <[email protected]> wrote:
> Thanks sam.
>
> that's not cool that Annotation don't work for local variable.
>
> I try the second version. IT works. thanks :).
> But I don't really like it.
>
> So I try the first version. Bit it is not really clear in my mind.
> I create a client class :
>
> public class Client {
>
> private IDrawGraphService service;
>
> @Inject
> public Client(IDrawGraphService service) {
> super();
> this.service = service;
> }
>
>
> public void executeService(ISimpleGraph graph, String path) throws
> IOException {
> service.draw(graph, path);
> }
> }
>
> but Don"t really see hos decide hos to decided is the service is a
> drawTextServiceImpl or a drawDotServiceImpl
>
>
> jérémie
>
> On 19 juil, 17:39, Sam Berlin <[email protected]> wrote:
> > Guice cannot detect annotations on local variables this way (although
> it's
> > an interesting idea!). You have two options here:
> >
> > 1) Make the variable on the class wherever this code is in and add an
> extra
> > module that has requestInjection(YourClass.this) in its configure method.
> > Then Guice will inject that variable as part of its Injector creation.
> > 2) Use injector.getInstance(Key.get(IDrawGraphService.class,
> ToDot.class))
> > instead. That tells Guice that you want to retrieve the instance defined
> by
> > the Key "@ToDot IDrawGraphService", as opposed to just
> "IDrawGraphService".
> >
> > sam
> >
> >
> >
> > On Mon, Jul 19, 2010 at 11:21 AM, Jerem's <[email protected]> wrote:
> > > Hello I try to use annotatoij on a local variable :
> >
> > > this is my module :
> >
> > > public class DrawModule extends AbstractModule {
> >
> > > @Override
> > > protected void configure() {
> >
> > >
> this.bind(IDrawGraphService.class).annotatedWith(ToDot.class).to(DrawDotSer
> viceImpl.class);
> > > }
> > > }
> >
> > > and my Annotation look like that :
> >
> > > @Retention(RUNTIME)
> > > @Target({ LOCAL_VARIABLE, FIELD, PARAMETER })
> > > @BindingAnnotation
> > > public @interface ToDot {
> >
> > > }
> >
> > > and I try to do that :
> >
> > > Injector drawGraphInjector = Guice.createInjector(new DrawModule());
> > > @ToDot
> > > IDrawGraphService drawDotService =
> > > drawGraphInjector.getInstance(IDrawGraphService.class);
> >
> > > But I have an exception :
> >
> > > Exception in thread "main" com.google.inject.ConfigurationException:
> > > Guice configuration errors:
> >
> > > 1) No implementation for
> > > fr.irisa.cairn.simpleGraph.drawGraph.service.IDrawGraphService was
> > > bound.
> > > while locating
> > > fr.irisa.cairn.simpleGraph.drawGraph.service.IDrawGraphService
> >
> > > 1 error
> > > at
> com.google.inject.InjectorImpl.getProvider(InjectorImpl.java:784)
> > > at
> com.google.inject.InjectorImpl.getProvider(InjectorImpl.java:743)
> > > at
> com.google.inject.InjectorImpl.getInstance(InjectorImpl.java:793)
> > > at
> > > fr.irisa.cairn.test.simpleGraph.runTimeTest.Launch.Main.main(Main.java:
> > > 25)
> >
> > > do you know why?
> >
> > > jérémie
> >
> > > --
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