ATM Problem Class Description Forms

**Class ATM**
Name	ATM
Base class(es)
Purpose	Manage the ATM and component parts
States	running
	stopped
Constructors	ATM(number, location)
Operations
*Mutators*	startupOperation()
	serviceCustomers(initialCash)
*Accessors*	getPIN()
	getTransactionChoice()
	getDoAnotherTransactionChoice()
	getAccountChoice(purpose)
	getWithdrawlAmountChoice()
	getAmountEntry()
	checkIfCashAvailable(amount)
	dispenseCash(amount)
	acceptEnvelope()
	issueReceipt(cardNumber, serialNumber, description, amount, balance, availableBalance)
	reEnterPIN()
	reportRejection(reason)
	ejectCard()
	retainCard()
	number()
Fields	_state
	_number
	_location
	_cardReader
	_display
	_keyboard
	_cashDispenser
	_envelopeAcceptor
	_receiptPrinter
	_operatorPanel

**Class CardReader**
Name	CardReader
Base class(es)
Purpose	Manage the magnetic stripe card reader
States	card not inserted
	card inserted but unreadable
	card inserted and readable
Constructors	CardReader()
Operations
*Mutators*	ejectCard()
	retainCard()
	checkForCardInserted()
*Accessors*	cardNumber()
Fields	_status
	_cardNumberRead

**Class Display**
Name	Display
Base class(es)
Purpose	Manage the video display unit
States	Each screen that can be displayed constitutes a distinct state
Constructors	Display()
Operations
*Mutators*	displayScreen(whichScreen, extraInfo)
	clearDisplay()
*Accessors*
Fields

**Class Keyboard**
Name	Keyboard
Base class(es)
Purpose	Manage the keys used for customer input
States
Constructors	Keyboard()
Operations
*Mutators*	readPIN()
	readTransactionChoice()
	readDoAnotherTransactionChoice()
	readAccountChoice()
	readWithdrawlAmountChoice()
	readAmountEntry()
	pressEnterToContinue()
*Accessors*
Fields

**Class EnvelopeAcceptor**
Name	EnvelopeAcceptor
Base class(es)
Purpose	Manage the slot that accepts a deposit envelope from the customer
States
Constructors	EnvelopeAcceptor()
Operations
*Mutators*	acceptEnvelope()
*Accessors*
Fields

**Class ReceiptPrinter**
Name	ReceiptPrinter
Base class(es)
Purpose	Manage the printer that produces customer receipts
States
Constructors	ReceiptPrinter()
Operations
*Mutators*	printReceipt(theATMnumber, theATMlocation, cardNumber, serialNumber,description, amount, balance, availableBalance)
*Accessors*
Fields

**Class OperatorPanel**
Name	OperatorPanel
Base class(es)
Purpose	Manage the panel that allows the operator to start/stop the machine, and to enter initial cash amount.
States	Switch in running position
	Switch in stopped position
Constructors	OperatorPanel()
Operations
*Mutators*	switchOn()
	getInitialCash()
*Accessors*
Fields

**Class Session**
Name	Session
Base class(es)
Purpose	Perform a session use case
States	running
	aborted due to repeated invalid PINs
Constructors	Session(cardNumber)
Operations
*Mutators*	doSessionUseCase()
	doInvalidPINExtension()
*Accessors*	cardNumber()
	PIN()
Fields	_state
	_cardNumber
	_PIN
	_currentTransaction

**Class Transaction**
Name	Transaction
Base class(es)
Purpose	Abstract common features of the various types of transaction use cases
States
Constructors	Transaction(session)
	makeTransaction(type, session)
Operations
*Mutators*	doTransactionUseCase()
	(abstract) getTransactionSpecificsFromCustomer()
	(abstract) sendToBank()
	(abstract) finishApprovedTransaction()
*Accessors*
Fields	_session
	_serialNumber
	_newBalance
	_availableBalance
	static _lastSerialNumberAssigned

**Class WithdrawlTransaction**
Name	WithdrawlTransaction
Base class(es)	Transaction
Purpose	Perform a withdrawl transaction use case
States
Constructors	WithdrawlTransaction(session)
Operations
*Mutators*	getTransactionSpecificsFromCustomer()
	sendToBank()
	finishApprovedTransaction()
*Accessors*
Fields	_fromAccount
	_amount

**Class DepositTransaction**
Name	DepositTransaction
Base class(es)	Transaction
Purpose	Perform a deposit transaction use case
States
Constructors	DepositTransaction(session)
Operations
*Mutators*	getTransactionSpecificsFromCustomer()
	sendToBank()
	finishApprovedTransaction()
*Accessors*
Fields	_toAccount
	_amount

**Class TransferTransaction**
Name	TransferTransaction
Base class(es)	Transaction
Purpose	Perform a transfer transaction use case
States
Constructors	TransferTransaction(session)
Operations
*Mutators*	getTransactionSpecificsFromCustomer()
	sendToBank()
	finishApprovedTransaction()
*Accessors*
Fields	_fromAccount
	_toAccount
	_amount

**Class InquiryTransaction**
Name	InquiryTransaction
Base class(es)	Transaction
Purpose	Perform an inquiry transaction use case
States
Constructors	InquiryTransaction(session)
Operations
*Mutators*	getTransactionSpecificsFromCustomer()
	sendToBank()
	finishApprovedTransaction()
*Accessors*
Fields	_fromAccount

**Class Bank**
Name	Bank
Base class(es)
Purpose	Manage communications with the bank
States
Constructors	Bank()
Operations
*Mutators*	initiateWithdrawl(cardNumber, PIN, ATMnumber, serialNumber, from, amount,newBalance, availableBalance)
	finishWithdrawl(ATMnumber, serialNumber, succeeded)
	initiateDeposit(cardNumber, PIN, ATMnumber, serialNumber, to, amount, newBalance, availableBalance)
	finishDeposit(ATMnumber, serialNumber, succeeded)
	doTransfer(cardNumber, PIN, ATMnumber, serialNumber, from, to, amount, newBalance, availableBalance)
	doInquiry(cardNumber, PIN, ATMnumber, serialNumber, from, newBalance, availableBalance)
*Accessors*	accountName(type)
	rejectionDescription(code)
Fields