Qualifier

A marker interface used to uniquely identify dependencies within the dependency injection container.

Qualifiers are essential for distinguishing between different instances of the same type. For example, if you need two different String instances (e.g., an API key and a database name), you can use different qualifiers to register and retrieve them.

Implementations of this interface must correctly override equals() and hashCode() to ensure that the DI container can accurately identify and cache dependencies.

Inheritors