Yeah I know that. but It is not really what I want.
If I do that :
@Inject
public Client(@ToDot IDrawGraphService service) {
.. }
service can only be a DrawDotServiceImpl. but how can I have a
DrawTextServiceImpl?
I wuld like that the client can choose the implementation.
Here, he can't.
may I can build a new class client2.
@Inject
public Client2(@ToText IDrawGraphService service) {
.. }
But I don't like to have two kinds of ciient.
Jérémis
On 19 juil, 19:37, Sam Berlin <[email protected]> wrote:
> 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
>
> > > > --
> > > > 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]<google-guice%[email protected]>
> > <google-guice%2bunsubscr...@google groups.com>
> > > > .
> > > > 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]<google-guice%[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.
