import lombok.RequiredArgsConstructor;
import java.util.*;
+import java.util.stream.Stream;
@RequiredArgsConstructor
public class ChatHome
{
- private final Map<UUID, Chatroom> chatrooms = new HashMap<>();
+ private final Map<UUID, Chatroom> chatrooms;
private final ChatroomFactory factory;
return chatroom;
}
- public Chatroom getChatroom(UUID id)
+ public Optional<Chatroom> getChatroom(UUID id)
{
- return chatrooms.get(id);
+ return Optional.ofNullable(chatrooms.get(id));
}
- public Collection<Chatroom> list()
+ public Stream<Chatroom> list()
{
- return chatrooms.values();
+ return chatrooms.values().stream();
}
}