UML教材1Car Case文档Word下载.docx

UML教材1Car Case文档Word下载.docx

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NotethatthisanswerisattheendofChapter4exceptthattheevent“CompanyCreatesbill”isomittedhere.Thesolutionpresentedinthisinstructor’sguideassumesthatthebilliscreatedasanoutputtotheevent“CompanyInspectsCar.”

B.EventTable:

EventTablefortheApacheRentACarRentalSystem

Event

Number

EventDescription

System

Input

ActorProviding

Output

Actor

Receiving

1.

Customerreservesacar

Reservation

Request

Customer

Confirmation

Authorization

Payment

authorizationsystem

2.

Customerrentsacar

RentalRequest

MileageOut

Employee

RentalAgreement

3.

Customerreturnsacar

ReturnRequest

4.

Companyinspectscar

Inspection

Bill

ThirdParty

5.

Customerpaysbill

Receipt

2.Identifytheusecasesandproduceausecasediagramforthesystem

（Chapter4）

A.Listofusecases:

∙ReserveCar

∙RentCar

∙ReturnCar

∙InspectCar

∙PayBill

B.ListofActors:

（i）Customer–initiatingandparticipating

（ii）Employee–initiating

（iii）CreditAuthorizationSystem–participating

（iv）ThirdPartyCustomer–participating

C.UseCaseDiagram:

3.Writeausecasenarrativedescribingthesystem'

sresponsetoeachbusinessevent（Chapter4）

Usecase:

ReserveCar

Actors:

Purpose:

Tomakeacarrentalreservation.

Overview:

Customersubmitsareservationrequest.Ifacartypeisavailable,customeristhenaskedforacreditcardtoreservethecar.Thesystemthensendsanauthorizationrequesttothecreditcardauthorizationsystem.Whenapproved,aconfirmationissenttothecustomer.

Type:

Essential

Preconditions:

Carspecificationsmustbeknowntothesystem.

Customermusthaveavalidcreditcard.

Postconditions:

Reservationwassavedinthesystem.

SpecialRequirements:

Customermustgetasystemresponsewithin5seconds.

FlowofEvents

ActorAction

SystemResponse

1.Thisusecasebeginswhenacustomersubmitsareservation.

2.Customerenterscartype,pickupdate,andreturndate.

3.Savesthereservation.

4.Customerentershisorherphonenumber,name,andaddress.

5.Savesthecustomerrecord.

6.Customerenterscreditcardnumber,expirationmonth,andexpirationyear.

7.Sendsthecreditcardnumber,expirationmonth,expirationyear,amount,andmerchantnumbertothecreditcardauthorizationsystem.Whenanauthorizationnumberisreceived,thecustomerisinformedandtheinformationissaved.

8.Customerreceivesaconfirmation.

AlternativeFlowofEvents

Line3.Ifcartypeisnotavailable,systeminformscustomerandreturnstoStep2.

Line7:

Ifcreditcardisnotauthorized,systeminformscustomerandterminatesthereservationrequest.

RentCar

Customer,Employee

Torecordarentalagreement.

Customersubmitsarentalrequest.Theemployeeentersthemileageout.Thesystemthenrecordsalltheauthorizeddriversandextrachargesthecustomerhasagreedto.Lastlythesystemproducesarentalagreement.

Areservationmusthavebeencompleted.

Rentalagreementwassavedinthesystem.Producesarentalagreement.

Customermustgetasystemresponsewithin15seconds.

1.Thisusecasebeginswhenacustomerarrivestopickuprentalcar.

2.[customerdoesnothaveareservation]ExecutetheReservesCarusecase.

3.Customerentersconfirmationnumberandtimeout.

4.Requeststhemileageoutfromanemployee.Whenamileageoutisreceived,therentalcontractissaved.

5.Customerentersname,birthdate,driver’slicensenumber,andstateofissueforeachdriver.

6.Addsdriverstotherentalagreement.

7.[customerisusingathird-partypayer]Customerentersaccountnumberofthirdpartythatwillpaytherentalcharges.

8.Addsaccountnumbertotherentalagreement.

9.Customerentersextrachargestobepaid（collisiondamagewaiver,liabilityinsurance,personalaccidentinsurance）.

10.Addstheextrachargestotherentalagreement.Producesarentalagreement.

11.Customerreceivesarentalagreement.

Line7.Ifaccountnumberisinvalidinformthecustomer,andreturntoStep9.

ReturnCar

Torecordthetimethecarwasreturned.

Afterthecustomerreturnstherentalcar,thetimeisrecordedsothecustomerincursnomorecharges.

Customermusthaverentedacar.

Thesystemrecordsthetimereturned.

None

1.Thisusecasebeginswhenacustomerreturnsarentalcar.

2.Customerenterslicensenumberandtimein.

3.Recordsthetimethecarwasreturned.

InspectCar

Torecordthemileageinandverifythatcarwasreturnedwithafulltankofgaswithoutdamage.

Afterthecustomerreturnstherentalcar,anemployeeinspectsthecarforgasanddamage.Theyalsorecordthemileageinforuseincreatingabill.Thebillisthenpresentedtothecustomer.

Customermusthavereturnedcar.

Thecustomerbillisproduced.

1.Thisusecasebeginsafteracustomerhasreturnedarentalcar.

2.Employeeenterslicensenumber,damage,gaslevel,andmileagein.

3.Recordsthedamage,gaslevel,andmileagein.Computestheextrachargesforgas,excessmileage,damage,andproducesabill.

4.Customerreceivesabill.

.

None.

PayBill

Tomakeapaymentforcarrental.

Customermaypayonlybycreditcard.Thesystemthensendsanauthorizationrequesttothecreditcardauthorizationsystem.Whenapproved,areceiptissenttothecustomer.

Finalbillmusthavebeenpresentedtothecustomer.

Paymentwassavedinthesystem.

1.Thisusecasebeginswhenacustomerisreadytopaybill.

2.Thecustomerenterslicensenumber,amountpaid,creditcardnumber,expirationmonth,andexpirationyear.

3.Sendsthecreditcardnumber,expirationmonth,expirationyear,amount,andmerchantnumbertothecreditcardauthorizationsystem.Whenanauthorizationnumberisreceived,thepaymentisrecorded.Arentalreceiptisproduced.

4.Customerreceivestherentalreceipt.

Line3:

Ifcreditcardisnotauthorized,systeminformscustomerandreturntoStep2.

4.Drawasystemsequencediagramforeachoftheusecasesinthecarrentalsystem.（Chapter4）

Step5.Produceadomainmodelshowingtheconcepts,attributes,andassociationsintheproblemdomainofthesystem.

ApacheRentACarDomainModel

NotethatReservationisnotassociatedwithcarasitdoesnotspecifyaparticularcar.Itonlyguaranteesaprice,thusitisassociatedwithaRateClassconcept.Thecarisassignedduringtherental.TheRentalisthecenterofattentioninthisdomainmodel.Almosteveryconceptassociateswithit.AswellastheThirdPartyCustomer,therentalhasextracharges,drivers,inspection,return,andpayment.

Twospecificationconceptsareused.TheyaretheRateClass,whichdescribestheCar,andtheExtraChargeSpecificationthatdescribestheExtraCharge.

Thereisoneinheritance,whichissimpletocomprehend.Boththerentalcustomerandthethirdpartycustomerhaveaphonenumber,name,andaddress.Thustheseattributesareobviouscandidatesforinheritance.

Thecreditcardisusedduringthereservationforguaranteepurposesandlastlyforthepaymentwhenthecarhasbeenreturnedandinspected.Wehaveassumedduringrentalthecreditcardisthesameoneusedforthereservationsoitisnotrecordedthen.Thisisacriticalassumptionthatshouldbemadeclearduringtheassignment.

Recallitisbesttonotallowcashorcheckpayments.

Theidentificationofattributesisusuallynotdifficult.Aproblemisdistinguishingtheuseofdatesandtimes.Asmostprogramminglanguagesdonotdistinguishbetweenthem,itisnotacriticalissue.

Theassociationnamesareneverusedindesign;

buttheyareusedtomaketherequirementseasiertounderstand,especiallythecontracts.

Themultiplicitiesarealsonotcriticalatthistimebutalsomake