Do Koin support something like "Get all implementations of this class"

# koin

[LeoColman]

Do Koin support something like "Get all implementations of this class"

[ritesh]

Can you please be specific.

[LeoColman]

I think what I'm doing is more of a code smell

[LeoColman]

Given I have the interface Foo and the classes Boo : Foo and Bat : Foo, is there a way to get<Foo>() and obtain both Boo and Bat?

[ritesh]

one interface, multiple implementation.
You can use named qualifier and can the same.

[LeoColman]

But I don't want to specify, I was going to test "All repositories do this", and this would be future proof if new repositories show up (very likely in my context)

[miqbaldc]

Hmm, the interface should do fine *imho. Every new repo that implement that interface, you can do something like this:

single { NewRepoImpl() }
single { ViewModelNeedRepository(get<NewRepoImpl>() as Foo) }

but looks like if you mean you just want to provide a Foo interface, and don't want to provide NewRepo(), I think that won't be possible currently?

@LeoColman

[LeoColman]

Yes. what I tried to say is that, like:

[LeoColman]

single { Boo() }
single { Bat() }

...
val foos: List<Foo> = getAll<Foo>()

[LeoColman]

I believe I might be overengineering this, but I wanted to test that all my repositories could provide the same data

[LeoColman]

I was creating a test to see that, for example, the H2 and MySql implementations worked the same way

[LeoColman]

I could write a test for both of them, sure, but I wanted a more generic approach, as I have use cases that would test 6~8 of implementations of the same interface, and I was trying to avoid the boilerplate

[LeoColman]

I hope I made myself clear, i think I'm being a little bit confusing here xD

[LeoColman]

The repositories was just an example. My actual use case is data generation through different algorithms. In the end their answer must be the same

[miqbaldc]

I see, in your case, you might wanna try to open an issue on the koin repo.

or idk this would solve your issue or not:

https://insert-koin.io/docs/2.0/documentation/reference/index.html

go to the section: 3.10.2. Dealing with generics

single { ArrayList<Foo> }

[gvetri]

Hi @LeoColman, in case you want to inject an implementation of a interface i leave you here what i’m actually doing ->

single<MyRepositoryInterface>(named("REPOSITORY")) { MyRepositoryImpl(get(named("MyRepositoryDependency"))) }

[arnaud.giuliani]

use additional type bindings: https://insert-koin.io/docs/2.0/quick-references/modules-definitions/#additional-types-binding-secondary-types

[arnaud.giuliani]

you can use the getAll<YourType> from koin instance

[miqbaldc]

Awesome works @arnaud.giuliani