Class Helper

java.lang.Object

Helper

public class Helper
extends java.lang.Object

A few helper static methods

Constructor Summary

Constructors

Constructor and Description
Helper()

Method Summary

Modifier and Type	Method and Description
static BroadcastList	getBroadcastListFromNickname(java.util.List<BroadcastList> lists, java.lang.String nickname) Given a nickname as a String return the BroadcastList from the List of BroadcastLists
static User	getUserFromNickname(java.util.List<User> users, java.lang.String nickname) Given a nickname as a String return the User object from the List of Users
static boolean	isExistingGlobalContact(java.lang.String nickname) Given a nickname determine whether a User exists globally with that nickname
static void	populateData(java.lang.String filename) Populate data from the file with the given path

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Helper

public Helper()

Method Detail

getUserFromNickname

public static User getUserFromNickname(java.util.List<User> users,
                                       java.lang.String nickname)

Given a nickname as a String return the User object from the List of Users

Parameters:

users - the list of users from which a user will be returned

nickname - the nickname of the user to be returned

Returns:

the USer object whose nickname is nickname and this object is searched from the users List

getBroadcastListFromNickname

public static BroadcastList getBroadcastListFromNickname(java.util.List<BroadcastList> lists,
                                                         java.lang.String nickname)

Given a nickname as a String return the BroadcastList from the List of BroadcastLists

Parameters:

lists - the list of lists from which one list object is to be returned

nickname - the nickname of the broadcast list to be returned

Returns:

the BroadcastList object whose nickname is nickname. This object is searched from the lists List

isExistingGlobalContact

public static boolean isExistingGlobalContact(java.lang.String nickname)

Given a nickname determine whether a User exists globally with that nickname

Parameters:

nickname - the nickname to check for

Returns:

true if a user exists globally with the provided nickname

populateData

public static void populateData(java.lang.String filename)
                         throws java.io.FileNotFoundException,
                                java.io.IOException,
                                WhatsAppRuntimeException,
                                java.text.ParseException

Populate data from the file with the given path

Parameters:

filename - the path to the input file

Throws:

java.io.FileNotFoundException - this is thrown if the file is not found

java.io.IOException - this is thrown if some error occurs while reading the input file

WhatsAppRuntimeException - this is thrown if any invalid data is used to construct any of the WhatsApp objects or a line is encountered that does not begin with any of the four words mentioned in the specification

java.text.ParseException - this exception is thrown if some issue occurs while parsing the date string