Object Oriented Static Modeling Of The Banking System 2-Software Requirement-Lecture Slides, Slides of Software Project Management

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Object-Oriented Static Modeling of

the Banking System - II

Lecture # 32

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Problem Description

-^ A bank has several automated teller machines (ATMs), which aregeographically distributed and connected via a wide area network to acentral server. Each ATM machine has a card reader, a cash dispenser,a keyboard/display, and a receipt printer. By using the ATM machine,a customer can withdraw cash from either checking or savingsaccount, query the balance of an account, or transfer funds from oneaccount to another. A transaction is initiated when a customer insertsan ATM card into the card reader. Encoded on the magnetic strip onthe back of the ATM card are the card number, the start date, and theexpiration date. Assuming the card is recognized, the system validatesthe ATM card to determine that the expiration date has not passed, thatthe user-entered PIN (personal identification number) matches the PINmaintained by the system, and that the card is not lost or stolen. Thecustomer is allowed three attempts to enter the correct PIN; the card isconfiscated if the third attempt fails. Cards that have been reported lostor stolen are also confiscated.

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Problem Description

-^ An ATM operator may start up and close down the ATM to replenishthe ATM cash dispenser and for routine maintenance. It is assumedthat functionality to open and close accounts and to create, update, anddelete customer and debit card records is provided by an existingsystem and is not part of this problem.•^ ‘Designing Concurrent, Distributed, and Real-Time Applications withUML’ by H. Gomaa, Addison-Wesley, 2000

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Entity Classes in Banking System

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Entity Classes in the Banking

System

DebitCard cardID: StringPIN: StringstartDate: DateexpirationDate: Datestatus: Integerlimit: Realtotal: Real

Account accountNumber: Stringbalance: Real

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Entity Classes in the Banking

System

CheckingAccountlastDepositAmount: Real

SavingsAccount interest: Real

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Entity Classes in the Banking

System

WithdrawalTransactionaccountNumber: Stringamount: RealBalance: Real

QueryTransactionaccountNumber: Stringamount: ReallastDepositAmount: Real

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Entity Classes in the Banking

System

TransferTransaction fromaccountNumber: StringtoAccountNumber: Stringamount: Real

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Entity Classes in the Banking

System

ATMCash cashAvailable: IntegerfiveHundreds: IntegeroneThousands: Integer

ATMCard cardID: StringstartDate: DateexpirationDate: Date

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Interface Classes for External

Objects

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User Interface Classes in the

Banking System

OperatorInterface

CustomerInterface

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System and Subsystem Classes

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A Bank Has Many ATMsBank

ATM

Has 1

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An Operator Maintains an ATM

ATM

Operator

Maintains 1