UML Diagrams for ATM System

This assignment focuses on creating UML diagrams for a decentralized ATM system. The solution includes a class diagram illustrating the classes Account, AccountData, and ATMState (with subclasses Start, Idle, and Ready), detailing their attributes and methods. A sequence diagram is also provided, demonstrating the interaction between these classes for a specific operation sequence: OPEN, LOGIN, PIN, DEPOSIT, BALANCE, SUSPEND, and CLOSE. The class diagram shows the relationships between the classes and their attributes and methods, while the sequence diagram visualizes the flow of interactions between objects during the execution of the specified operations. The provided code snippets show the methods within each class, illustrating the state transitions and data manipulation involved in the ATM system's functionality.

Contents
Decentralized...................................................................................................................................2
Class Diagram..............................................................................................................................2
Sequence Diagram.....................................................................................................................10

Decentralized
Class Diagram

Class Account:
S// point to current state
LS[0] // point to start state
LS[1] // point to idle state
LS[2] // point to ready state
Operations:
create(){
S->create()
}
Open(int p, int y, int a){
S->open(p,y,a);
}
Pin(int p){
S->pin(p)
}

Deposit(int d){
S->deposit(d);
}
Withdraw(int y){
S->withdraw(y);
}

Balance(){
S->balance()
}
Logout(){
S->logout()
}
Suspend(){
S->suspend()
}
activated(){
S->activated()
}
Close(){
S->close()
}
Class AccountData:

setPin(int pincode){
pin = pincode
}
Deposit(int d){
Balance = balance + d
}
withdraw(int w){
Balance = balance - w;
}
Balance(){
Return balance;
}
setAccountStatus(String status){
accountStatus = status;
}
Class “ATMState”: all methods are abstract methods in this class
Class “Start”

create(){
Account -> changeState(1)
}
Class “Idle”
pin(int p){
ad->setPin(p)
account->changeState(2)
}
open(int p,int y,int a){
ad->setPin(p)
ad->setIdentification(y)
ad->setBalance(a)
}
login(int y){
ad->setIdentification(y)
account->changeState(2)
}
Class “Ready”
Deposit(int d){
Ad.setBalance(ad.getBalance() + d);
}
Withdraw(int y){
Ad.setBalance(ad.getBalance() - w);
}

Balance(){
Return ad.balance();
}
Logout(){
Account.changeState(1)
}
Suspend(){
Ad.setAccountStatus(“suspend”);
}
activated(){
Ad.setAccountStatus(“activated”);
}
Close(){
Account.changeState(1)

}
Sequence Diagram
Provide a sequence diagram for the following operation sequence:
OPEN(123,111,1000), LOGIN(111), PIN(123), DEPOSIT(200), BALANCE(),
suspend(), close.