ContributesIntoMap

Contributes an IntoMap binding of the annotated type to the given scope as a binding (if specified) or single declared supertype. A MapKey must be declared either on the annotated class or on the binding.

// Implicit supertype is Base
@ClassKey(Impl::class)
@ContributesIntoMap(AppScope::class)
@Inject
class Impl : Base

Use binding to specify a specific bound type if an implicit one is not possible.

// Explicit supertype is Base
@ClassKey(Impl::class)
@ContributesIntoMap(AppScope::class, binding = binding<Base>())
@Inject
class Impl : Base, AnotherBase

binding's type argument can also be annotated with a MapKey.

// Explicit supertype is Base
@ContributesIntoMap(AppScope::class, binding = binding<@ClassKey(Impl::class) Base>())
@Inject
class Impl : Base, AnotherBase

This annotation is repeatable, allowing for contributions as multiple bound types. Note that all repeated annotations must use the same scope.

If this declaration is scoped, the Scope annotation will be propagated to the generated IntoMap declaration.

If this declaration is qualified, the Qualifier annotation will be propagated to the generated IntoMap declaration.