import javax.inject.Singleton
import java.lang.annotation.Documented
import java.lang.annotation.Retention
import static java.lang.annotation.RetentionPolicy.RUNTIME
@Requires(classes = Car.class ) (1)
@Singleton (2)
@Retention(RUNTIME)
@interface Driver {
}

In the example above the @Singleton annotation is applied to the @Driver annotation which results in every class that is annotated with @Driver being regarded as singleton.

Declaring Another Scope

class Foo {}

Using @DefaultScope

@Requires(classes = Car.class )
@DefaultScope(Singleton.class) (1)
@Documented
@Retention(RUNTIME)
@interface Driver {
}