UserChatMap

java.lang.Object

server.UserChatMap

public class UserChatMap extends Object

Supporting bi directional data structure for storing (user, chat) tuples. Users are unique while chats are not.

Constructor Summary

Constructors

Constructor

Description

UserChatMap()

Constructor added to prevent javadoc warning
Method Summary

Modifier and Type

Method

Description

String

getChat(String user)

Gets the chat that a user is active in

Set<String>

getUsers(String chat)

Gets all users that are active in a chat

void

put(String user, String chat)

Add or change a (user, chat) tuple.

void

remove(String user)

Removes a user from the map.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- UserChatMap
  
  public UserChatMap()
  
  Constructor added to prevent javadoc warning
Method Details
- put
  
  public void put(String user, String chat)
  
  Add or change a (user, chat) tuple.
  
  Parameters:
  
  user - is the user
  
  chat - is the chat that the user is active in
- getChat
  
  public String getChat(String user)
  
  Gets the chat that a user is active in
  
  Parameters:
  
  user - username
  
  Returns:
  
  chatname
- getUsers
  
  public Set<String> getUsers(String chat)
  
  Gets all users that are active in a chat
  
  Parameters:
  
  chat - chatname
  
  Returns:
  
  Set of usernames
- remove
  
  public void remove(String user)
  
  Removes a user from the map. Should be used when a user disconnects.
  
  Parameters:
  
  user - username