bell - uml in an hour

8/7/2019 Bell - UML in an hour

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A Brief Introduction toUML

orUML in an Hour

(more or less)Copyright 2000 by RWD Technologies Inc.

All Rights Reserved


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Wha t is t he UML?

Unified Modeling LanguageIt is a modeling language, not a processRumbaugh joined Booch at Rational in 1994; in1995, Rational added Jacobsen to their team. In1996, work on the UML was begun.In January of 1997, Rational released UML 1.0 tothe OMG as their proposal for a methodsstandard.


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Obj ectives

Upon successful completion of thispresentation, you will be able to: V isually identif y UML di agr ams.

Underst and t he differences between t he UMLdiagr ams. Identif y key sym bols found in e ach diagr am. Identif y the di agr ams used in e ach Pro V ision

phase.


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UML Di agr ams to be Covered

C lass DiagramsUse C ase DiagramsC ollaboration Diagrams

Sequence DiagramsPackage DiagramsC omponent DiagramsDeployment Diagrams

Activity DiagramsState Diagrams


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Class Di agr ams

Are the most fundamental UML Diagram.Describe the classes in the system, and thestatic relationships between classes.C

lass diagrams are used during Analysis,Design and Development.


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UML C lass Di agr am

DVD Movie VHS Movie Video Game

Rental Item{abstract}

Rental Invoice

1..* 1

Customer

Checkout Screen

1

0..1

1


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UML C lass Di agr am


Rental Item{abstract}

Rental Invoice

1..* 1

Customer

Checkout Screen

0..1

1

SimpleAssociation

Class

AbstractClass

SimpleAggregation

Generalization

Composition(Dependency)

Multiplicity


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IDEF1X 97 Class Di agr am

Rental Invoice

Customer

Checkout Screen

Class Relationship

Multiplicity/Cardinality


Rental Item

Dependentclass

Base classis abstract

Generalization(cluster)


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Parts of a Class

C lasses can have four parts N ame Attri butes O per ations R esponsi bilities

C lasses can show visibilityand types.

All parts but the Name areoptional.

MyClass N ame

+So mePu blicAttri bute : So meTy pe

-SomePriv ateAttri bute : So meTy pe

#So meProtectedAttri bute : So meTy pe

+ClassMet hodOne()

+ClassMet hodTwo()

R esponsi bilities

-- can option ally be descri bed here.


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Obj ect Di agr ams

An Object is an instance of aclass.

Object names are underlined.

Object diagrams are similar toclass diagrams. Many of thesame notations are used.Object diagrams captureinstances of classes, and allowthe dynamic relationships to

be shown.

ThisOne : M yClass N ame

+So mePu blicAttri bute : So meTy pe

-SomePriv ateAttri bute : So meTy pe

#So meProtectedAttri bute : So meTy pe

+ClassMet hodOne()

+ClassMet hodTwo()


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Class and Obj ect Di agr ams

0..1

0..n

Customer Rental Item

Rents+name:string+id:integer

+released:date+id:integer

Joe: Customer Casablanca: Movie

+name:Joe Smith

+id:1667

+released:1942

+id:22340

Class Diagram

Object Diagram

Class Name

Object NameAttributes

Association Name


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Stereotypes, TaggedValues and C onstraintsextend the UML Stereot y pes are

shown usin g Tagg ed V alues and

Constr aints areshown usin g { }

R entalContr act

{version=1.1}

List Of R entedIte ms

Custo mer {ordered by title}

Constr aint

Tagged V alue

Stereot y pe

Stereot y pes, T agg ed V alues and Constr aints


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Use C ases

Describe interactions between users andcomputer systems (both called actors) .C apture user-visible functions.

Achieve discrete measurable goals.May be small (M ake se lected text bold) lar ge (Gener ate a ta ble of contents)Are typically used during Analysis and Design.


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Use C ase Di agr am

TelephoneCustomer

In-StoreCustomer

Clerk

Identify Movie

Open Account

Return Movie

Customer

Review Account Status

Actor

Use Case


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Use C ase R eport

The Use C ase Reportprovides documentationfor the Use C ase.

A Use C ase is not

complete without thereport.The elements of the UseC ase Report are shownon the right.

Brief descriptionPreconditionFlow of events Main f low Su bf lows Altern ate f lows

PostconditionSpecial RequirementsEnclosures Diagr ams Pictures of t he UI


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Extends and Inc ludes R elations hips

Extends

Inc ludesF ind Item

by Title

F ind Itemsby Actor

Search Movie

Database

includes

includesCustomer

Dependency

extends

Stereotype

Check InMovie

AssessLate Fees

Clerk


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Colla bor ation Di agr ams

C ollaboration diagrams describe objectinteractions organized around the objects andtheir links to each otherFocus on exchange of messages between objectsthrough their associations.Appears during Analysis phaseEnhanced during Design phase


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:Check-outManager

:Customer

:Inventory

1: enter_customer()

3: enter_movies()

5: add(customer, movies)

7: print invoice() 2: IsValidCust(CustId)

4:GetMovieByBarcode()

Colla bor ation Di agr am - R ent Movie

:Clerk

Object

Message

:Rented Items

8: generateRentalTotal()


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Sequence Di agr ams

C an be morphed from C ollaboration Diagrams.Describe interactions between objects arranged in timesequenceFocus on objects and classes involved in the scenario

and the sequence of messages exchangedAssociated with use casesUsed heavily during Analysis phase and are enhancedand refined during Design phase


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Sequence Di agr am - R ent Movie

1: find customer()2: search (string)

4: search (string)

6: add(Cust, item)

3: enter movie()

5: rent (movie)

7: printInvoice() 8: generateRentalTotal()

Object

Lifeline

ActivationMessage

:CheckoutMgr :InventoryCust:Customer :RentedItems:Employee


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Pack age Di agr am

C lerk User Interface

facadeusinessyste

C lient

(to businesssyste )Custo er ata

ental creenClass

Package


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Com ponent Di agr am

app ca onV deo

Works a on(vs a on exe)

braryDB Server

n er ace(dbsvr d )

Supp ed byM croso

brary

App ca onFramework(app r d )

Component

Interface

Dependency

Note


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Identif y Caller

CreateAccount

Obtain N ame& Address

O penAccount?Current

Custo mer? [no] [no]

[yes] [yes]

Action State

Start State

Decision

End State

Activit y Diagr am


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Identif y Movie

PlaceOrder

Place

Order

FillOrder

Pay

Deliver Movie

PickupMovie

Custo mer M anager Wal kin g Clerk F ork Point

Join Point

CollectMone y

Swi mla nes and Fork/Join Points


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State Di agr am

Validate

do/ heckaccoun t

cus tome r appea r s

Ch eck-Out

do/check -ou tideo

[accoun t a lid]/ e t fir s t ideo

[mo r e ideos ]/ e t nex t ideo

Ch eck-OutComp lete

[no mo r e ideos ]

[accoun t no ta lid]State

Transition

Activity

Guard

Action

Event


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UML Di agr am Usage

D v lopm ntPh s UML Di gr ms

Analysis se Cases, Class Diagrams, ActivityDiagrams, Collaboration Diagrams,Sequence Diagrams

Design Class Diagrams, CollaborationDiagrams, Sequence Diagrams, StateDiagrams, Component DiagramsDeployment Diagrams

Development Collaboration Diagrams, SequenceDiagrams, Class Diagrams, State

Diagrams, Component Diagrams,Deployment DiagramsImplementation Package Diagrams, Deployment

Diagrams


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Conc lusion

UML is a robust notation that can expressinformation gathered throughout a projectslifecycle.Adopting standard use of UML can improvecommunication between clients andInformation Systems Service Providers.UML can be used as an effective data modeling

tool as well as an object modeling tool.


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Questions If I dont know theanswer, maybe I can

make one up!


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For more infor mation

C ontact:John T. BellRWD Technologies Inc.10480 Little Patuxent ParkwayC olumbia, MD 21044

Phone: 410-884-2453email: [email protected]

http://www.rwd.com

bell - uml in an hour

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