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Class atm.transaction.Transaction

java.lang.Object
   |
   +----atm.transaction.Transaction

public abstract class Transaction

extends Object

ASKING_DO_ANOTHER_STATE

Asking if customer wants to do another transaction

atm

ATM to use for communication with the customer

balances

Used to return account balances from the bank

card

Customer card for the session this transaction is part of

COMPLETING_TRANSACTION_STATE

Completing transaction

GETTING_SPECIFICS_STATE

Getting specifics of the transaction from customer

INVALID_PIN_STATE

Performing invalid PIN extension

message

Message to bank describing this transaction

nextSerialNumber

Next serial number - used to assign a unique serial number to each transaction

pin

PIN entered or re-entered by customer

PRINTING_RECEIPT_STATE

Printing receipt

SENDING_TO_BANK_STATE

Sending transaction to bank

serialNumber

Serial number of this transaction

session

Session in which this transaction is being performed

state

The current state of the transaction

TRANSACTION_TYPES_MENU

List of available transaction types to display as a menu

Transaction(ATM, Session, Card, int)

Constructor

completeTransaction()

Complete an approved transaction - each subclass must implement this appropriately.

getSerialNumber()

Get serial number of this transaction

getSpecificsFromCustomer()

Get specifics for the transaction from the customer - each subclass must implement this appropriately.

makeTransaction(ATM, Session, Card, int)

Create a transaction of an appropriate type by asking the customer what type of transaction is desired and then returning a newly-created member of the appropriate subclass

performInvalidPINExtension()

Perform the Invalid PIN Extension - reset session pin to new value if successful

performTransaction()

Peform a transaction.

 protected ATM atm

ATM to use for communication with the customer

 protected Session session

Session in which this transaction is being performed

 protected Card card

Customer card for the session this transaction is part of

 protected int pin

PIN entered or re-entered by customer

 protected int serialNumber

Serial number of this transaction

 protected Message message

Message to bank describing this transaction

 protected Balances balances

Used to return account balances from the bank

 private static final String TRANSACTION_TYPES_MENU[]

List of available transaction types to display as a menu

 private static int nextSerialNumber

Next serial number - used to assign a unique serial number to each transaction

 private int state

The current state of the transaction

 private static final int GETTING_SPECIFICS_STATE

Getting specifics of the transaction from customer

 private static final int SENDING_TO_BANK_STATE

Sending transaction to bank

 private static final int INVALID_PIN_STATE

Performing invalid PIN extension

 private static final int COMPLETING_TRANSACTION_STATE

Completing transaction

 private static final int PRINTING_RECEIPT_STATE

Printing receipt

 private static final int ASKING_DO_ANOTHER_STATE

Asking if customer wants to do another transaction

 protected Transaction(ATM atm,
                       Session session,
                       Card card,
                       int pin)

Constructor

Parameters:

atm - the ATM used to communicate with customer

session - the session in which this transaction is being performed

card - the customer's card

pin - the PIN entered by the customer

 public static Transaction makeTransaction(ATM atm,
                                           Session session,
                                           Card card,
                                           int pin) throws CustomerConsole. Cancelled

Create a transaction of an appropriate type by asking the customer what type of transaction is desired and then returning a newly-created member of the appropriate subclass

Parameters:

atm - the ATM used to communicate with customer

session - the session in which this transaction is being performed

card - the customer's card

pin - the PIN entered by the customer

Returns:

a newly created Transaction object of the appropriate type

Throws: CustomerConsole. Cancelled

if the customer presses cancel instead of choosing a transaction type

 public boolean performTransaction() throws Transaction. CardRetained

Peform a transaction. This method depends on the three abstract methods that follow to perform the operations unique to each type of transaction in the appropriate way.

Returns:

true if customer indicates a desire to do another transaction; false if customer does not desire to do another transaction

Throws: Transaction. CardRetained

if card was retained due to too many invalid PIN's

 public Status performInvalidPINExtension() throws CustomerConsole. Cancelled, Transaction. CardRetained

Perform the Invalid PIN Extension - reset session pin to new value if successful

Returns:

status code returned by bank from most recent re-submission of transaction

Throws: CustomerConsole. Cancelled

if customer presses the CANCEL key instead of re-entering PIN

Throws: Transaction. CardRetained

if card was retained due to too many invalid PIN's

 public int getSerialNumber()

Get serial number of this transaction

Returns:

serial number

 protected abstract Message getSpecificsFromCustomer() throws CustomerConsole. Cancelled

Get specifics for the transaction from the customer - each subclass must implement this appropriately.

Returns:

message to bank for initiating this transaction

Throws: CustomerConsole. Cancelled

if customer cancelled this transaction

 protected abstract Receipt completeTransaction() throws CustomerConsole. Cancelled

Complete an approved transaction - each subclass must implement this appropriately.

Returns:

receipt to be printed for this transaction

Throws: CustomerConsole. Cancelled

if customer cancelled this transaction

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