Low Level Design for Meeting Scheduler:

In this class diagram:

User class represents a user with attributes id, name, and email.
Recipient class is intentionally left empty to indicate that it extends the User class. It inherits the attributes from User.
Meeting class represents a meeting with attributes meetingId, startTime, endTime, and a list of recipients (Recipients can be User objects).
MeetingRoom class represents a meeting room with attributes roomId, name, capacity, and a reference to a Meeting class indicating a meeting scheduled in the room.
Notification class represents a notification sent to users about scheduled meetings. It includes attributes notificationId, user (User), and meetingRoom (MeetingRoom).
MeetingRoomScheduler class represents the central component. It includes lists of meetingRooms, a map of userMeetingRoom assignments, and a list of notifications.
This diagram gives you a visual representation of the relationships between the various classes and how they interact in a Meeting Room Scheduler system. Remember, it’s a simplified diagram, and in actual implementation, you might need to include more methods and attributes as per your system requirements.

+ — — — — — — — — — +
| User |
+ — — — — — — — — — +
| — id: int |
| — name: String |
| — email: String |
+ — — — — — — — — — +
| + getUserId(): int |
| + getName(): String |
| + getEmail(): String |
+ — — — — — — — — — +
|
+ — — — — — — + — — — — — — +
| Recipient |
+ — — — — — — — — — — — — +
| |
+ — — — — — — — — — — — — +
| |
+ — — — — — — — — — — — — +

+ — — — — — + — — — — — — +
| Meeting |
+ — — — — — — — — — — — — +
| — meetingId: int |
| — startTime: DateTime |
| — endTime: DateTime |
| — recipients: List<Recipient> |
+ — — — — — — — — — — — — +
| + getMeetingId(): int |
| + getStartTime(): DateTime |
| + getEndTime(): DateTime |
| + getRecipients(): List<Recipient> |
+ — — — — — — — — — — — — +
|
+ — — — — — — + — — — — — — +
| MeetingRoom |
+ — — — — — — — — — — — — +
| — roomId: int |
| — name: String |
| — capacity: int |
| — meeting: Meeting |
+ — — — — — — — — — — — — +
| + getRoomId(): int |
| + getName(): String |
| + getCapacity(): int |
| + getMeeting(): Meeting |
+ — — — — — — — — — — — — +
|
+ — — — — — — + — — — — — — +
| Notification |
+ — — — — — — — — — — — — +
| — notificationId: int |
| — user: User |
| — meetingRoom: MeetingRoom |
+ — — — — — — — — — — — — +
| + getNotificationId(): int |
| + getUser(): User |
| + getMeetingRoom(): MeetingRoom |
+ — — — — — — — — — — — — +
|
+ — — — — — — + — — — — — — +
| MeetingRoomScheduler |
+ — — — — — — — — — — — — +
| — meetingRooms: List<MeetingRoom> |
| — userMeetingRoomMap: Map<User, MeetingRoom> |
| — notifications: List<Notification> |
+ — — — — — — — — — — — — +
| + addMeetingRoom(room: MeetingRoom): void |
| + assignMeetingRoom(user: User, room: MeetingRoom): void |
| + scheduleNotification(notification: Notification): void |
+ — — — — — — — — — — — — +