Questions:
I have the following snippet in my dagger 2 module
@Singleton
@Provides
@ElementsIntoSet
fun providesQueries(foo: Foo): Set<Foo>{
val queries = LinkedHashSet<Foo>()
queries.add(foo)
return queries
}
I try to inject into in this way
@Inject lateinit var foo: Set<Foo>
But dagger shows an error which says that Dagger cannot provides java.util.Set without @Provides or @Produces method.
I did the same in java and it worked. Does somebody know why is it failing?
How to&Answers:
As it described in the Kotlin reference
To make Kotlin APIs work in Java we generate
Box<Super>as
Box<? extends Super>for covariantly definedBox(orFoo<? super Bar>for
contravariantly defined Foo) when it appears as a parameter.
You can use @JvmSuppressWildcards for avoiding it, just as following:
@Inject lateinit var foo: Set<@JvmSuppressWildcards Foo>
Tags: androidandroid
