How are lookups by type implemented?
Jini’s lookup service enables clients to look for specific kinds of services. When multiple services of the desired kind exist, clients can use attributes to narrow their search and help them select the best service for their needs. To specify the kind of service desired, clients specify Java types. The types specified are most often interfaces, but can also be classes. Because developers of Jini clients must indicate the kind of desired service with a Java type, the developer knows about the type at compile-time, and will therefore know how to user whatever object is returned by the lookup service.
