I did try to achieve my goal using annotation. It works. But I wonder if
there's more concise way. My current solution is:
class BarA extends Bar {
@Inject
public Bar(@Named("A") Foo foo) { }
}
class BarB extends Bar {
@Inject
public Bar(@Named("B") Foo foo) { }
}
Then in the module:
bind(AbstractFoo.class).annotatedWith(Names.named("A")).to(FooA.class);
bind(AbstractFoo.class).annotatedWith(Names.named("B")).to(FooB.class);
Multibinder<Bar> binder = Multibinder.newSetBinder(binder(), new Bar.class);
binder.addBinding().to(BarA.class);
binder.addBinding().to(BarB.class);
The problem here is that I need to create two dummy subclass, BarA and
BarB, in order to utilize annotation. I wonder if there's a way to reduce
this sort of boilerplate code.
On Wednesday, November 20, 2013 4:04:20 PM UTC-8, Armin Bahramshahry wrote:
>
> Take a look at @Named,
> https://code.google.com/p/google-guice/wiki/BindingAnnotations, I believe
> that's what you wanna do
>
> On Wednesday, November 20, 2013 12:29:30 PM UTC-8, Jia Pu wrote:
>>
>> Let's same I have an abstract class with several subclasses:
>>
>> public abstract AbstractFoo { }
>>
>> public FooA extends AbstractFoo {}
>> public FooB extends AbstractFoo {}
>> public FooC extends AbstractFoo {}
>>
>> There's also a class with following injection:
>>
>> class Bar {
>> @Inject
>> public Bar(Foo foo) { }
>> }
>>
>> Is it possible to add Bar multiple times into multibinder with different
>> concrete Foo classes?
>>
>> Multibinder<Bar> binder = Multibinder.newSetBinder(binder(), new
>> Bar.class);
>> binder.addBinding .... // Now what?
>>
>> Or did I completely miss the point of Guice here? I'm new to java world,
>> BTW.
>>
>
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