servlet
Class AccessOperation

java.lang.Object
  servlet.AccessOperation

public class AccessOperation
extends java.lang.Object

Provides a whole of methods which to communicate with the server.

Author:

Alessandro Franchini

Field Summary

private static BSForServletInterface	boot The reference to the remote object of the bootstrap
private static MSForServletInterface	msi The reference to the remote object of the message

Constructor Summary

AccessOperation()

Method Summary

static MessageServer	askMsgServer(User user) Asks the assignation of a Message Server
private static void	catchError(java.lang.String error) Visualizes a graphic interface with the error
static void	changeStateUser(int form, User user) Changes the friendship's state with the user
static boolean	contactUser(User user) Lets contact another user the first time
static java.util.Vector<Message>	getMail(User user, java.lang.String pass, MessageServer ms) Downloads and deletes the messages received by the user
static User	getUser(User user) Gets information about the requested user
static ContactList	logMsg(User user, java.lang.String pass, MessageServer ms) This method finds the reference to the remote object of the message server, sets the State to true and downloads the Contacts List
static void	logOff() Set the user's state to false.
static boolean	register(User user, java.lang.String pass) This method is of use to the user's registration
static void	sendMessage(Message mx) Sends a message to the message server
static boolean	setConnBoot(java.net.InetAddress bootIa, int port) This method finds the reference to the remote object of the bootstrap.

Methods inherited from class java.lang.Object

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

Field Detail

boot

private static BSForServletInterface boot

The reference to the remote object of the bootstrap

msi

private static MSForServletInterface msi

The reference to the remote object of the message

Constructor Detail

AccessOperation

public AccessOperation()

Method Detail

setConnBoot

public static boolean setConnBoot(java.net.InetAddress bootIa,
                                  int port)

This method finds the reference to the remote object of the bootstrap.

Parameters:

bootIa - the bootstrap's address

port - the bootstrap's port

Returns:

true if the object is found; else false.

register

public static boolean register(User user,
                               java.lang.String pass)

This method is of use to the user's registration

Parameters:

user - the user

pass - the user's pass

Returns:

true if the registration has been made; else false

askMsgServer

public static MessageServer askMsgServer(User user)

Asks the assignation of a Message Server

Parameters:

user - the user who to assign the Message Server to.

Returns:

The Message Server assigned

logMsg

public static ContactList logMsg(User user,
                                 java.lang.String pass,
                                 MessageServer ms)

This method finds the reference to the remote object of the message server, sets the State to true and downloads the Contacts List

Parameters:

user - the user

pass - the user's password

ms - the message server

Returns:

the contact list.

getMail

public static java.util.Vector<Message> getMail(User user,
                                                java.lang.String pass,
                                                MessageServer ms)

Downloads and deletes the messages received by the user

Parameters:

user - the user

pass - the user's password

ms - the message server

Returns:

the message received by the user

changeStateUser

public static void changeStateUser(int form,
                                   User user)

Changes the friendship's state with the user

Parameters:

form - 0 to unlock the contact; 1 to lock the contact

user - the user

logOff

public static void logOff()

Set the user's state to false.

sendMessage

public static void sendMessage(Message mx)

Sends a message to the message server

Parameters:

mx - the message server

getUser

public static User getUser(User user)

Gets information about the requested user

Parameters:

user - the user

Returns:

The user with all the information

contactUser

public static boolean contactUser(User user)

Lets contact another user the first time

Parameters:

user - the user

Returns:

true if the user is online; else false.

catchError

private static void catchError(java.lang.String error)

Visualizes a graphic interface with the error

Parameters:

error - the error