Examples of Diagrams

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The Value of the UML

� Is an open standard

� Supports the entire software development

lifecycle� Supports diverse applications areas

� Is based on experience and needs of the

user community� Supported by many tools

Cr eating the UML

Booch method OMT

Unified Method 0.8OOPSLA ́ 95

OOSEOther methods

UML 0.9Web - June ́ 96

public

feedback

Final submission to OMG, Sep µ97

First submission to OMG, Jan ´97

UML 1.1

OMG Acceptance, Nov 1997

UML 1.3

UML 1.0UML partners

UML Par tners

� Rational Software Corporation� Hewlett-Packard� I-Logix� IBM

� ICON Computing� Intellicorp� MCI Systemhouse� Microsoft� ObjecTime� Oracle� Platinum Technology� Taskon� Texas Instruments/Sterling Software

� Unisys

Before and after

conditions

Statecharts

Gamma, et al

Frameworks and patterns,

HP Fusion

Operation descriptions and

message numbering

Embley

Singleton classes and

high-level view

Wirfs-Brock

Responsibilities

Classification

Shlaer - Mellor

Object lifecycles

Rumbaugh

Booch method

Jacobson

Contr ibutions to the UML

Over view of the UML

� The UML is a language for

± visualizing

± specifying ± constructing

± documenting

the artifacts of a software-intensive system

Over view of the UML

� Modeling elements

� Relationships

� Extensibility Mechanisms� Diagrams

Modeling Elements� Structural elements

± class, interface, collaboration, use case,

active class, component, node

� Behavioral elements

± interaction, state machine� Grouping elements

± package, subsystem

� Other elements

± note

Relationships

� Dependency

� Association

� Generalization� Realization

Extensibility Mechanisms

� Stereotype

� Tagged value

� Constraint

Models, Views, and Diagr ams

Use CaseDiagramsUse Case

DiagramsUse CaseDiagrams

ScenarioDiagramsScenario

DiagramsCollaborationDiagrams

StateDiagramsState

DiagramsComponentDiagrams

ComponentDiagramsComponent

DiagramsDeploymentDiagrams

StateDiagramsState

DiagramsObjectDiagrams

ScenarioDiagramsScenario

DiagramsStatechartDiagrams

Use CaseDiagramsUse Case

DiagramsSequence

Diagrams

StateDiagramsState

DiagramsClassDiagrams

ActivityDiagrams

A model is a complete

description of a system

from a particular

perspective

Models

Diagr ams

� A diagram is a view into a model

± Presented from the aspect of a particular

stakeholder

± Provides a partial representation of the

system

± Is semantically consistent with other views

� In the UML, there are nine standarddiagrams

± Static views: use case, class, object,

component, deployment

Use Case Diagr am

� Captures system functionality as seen by

Use Case Diagram

� Captures system functionality as seen by

� Built in early stages of development� Purpose

± Specify the context of a system

± Capture the requirements of a system ± Validate a system¶s architecture

± Drive implementation and generate test cases

� Developed by analysts and domain

ex erts

Class Diagr am

� Captures the vocabulary of a system

Class Diagr am

� Captures the vocabulary of a system

� Built and refined throughout development

� Purpose ± Name and model concepts in the system

± Specify collaborations

± Specify logical database schemas� Developed by analysts, designers, and

implementers

Object Diagr am

� Captures instances and links

Object Diagr am

� Shows instances and links

� Built during analysis and design

� Purpose ± Illustrate data/object structures

± Specify snapshots

� Developed by analysts, designers, andimplementers

Component Diagr am

� Captures the physical structure of the

implementation

Component Diagr am

� Captures the physical structure of the

implementation

� Built as part of architectural specification� Purpose

± Organize source code

± Construct an executable release ± Specify a physical database

� Developed by architects and programmers

Deployment Diagr am

� Captures the topology of a system¶s

hardware

Deployment Diagr am

� Captures the topology of a system¶s

hardware

� Built as part of architectural specification� Purpose

± Specify the distribution of components

± Identify performance bottlenecks

� Developed by architects, networking

engineers, and system engineers

Sequence Diagr am

� Captures dynamic behavior (time-oriented)

Sequence Diagr am

� Captures dynamic behavior (time-oriented)

� Purpose

± Model flow of control ± Illustrate typical scenarios

Collabor ation Diagr am

� Captures dynamic behavior (message-

oriented)

Collabor ation Diagr am

� Captures dynamic behavior (message-

oriented)

� Purpose ± Model flow of control

± Illustrate coordination of object structure and

control

Statechar t Diagr am

� Captures dynamic behavior (event-

oriented)

Statechar t Diagr am

� Captures dynamic behavior (event-

oriented)

� Purpose ± ± Model object lifecycleModel object lifecycle

± ± Model reactive objects (user interfaces,Model reactive objects (user interfaces,

devices, etc.)devices, etc.)

Activity Diagr am

� Captures dynamic behavior (activity-oriented)

Activity Diagr am

� Captures dynamic behavior (activity-oriented)

� Purpose

± Model business workflows ± Model operations

Architecture and the UML

Organization

Package, subsystem

Dynamics

Interaction

State machine

Design View Implementation View

Process View

ComponentsClasses, interfaces,collaborations

Active classes

Deployment View

Use Case View

Use cases

Unified Process structure

Management

Envir onment

Business Modeling

Implementation

Analysis & Design

PreliminaryIteration(s)

Iter.#1

PhasesPr ocess Workflows

Iter ations

Suppor ting Workflows

Iter.#2

Iter.#n

Iter.#n+1

Iter.#n+2

Iter.#m

Iter.#m+1

Deployment

Configur ation Mgmt

Requir ements

Elabor ation Tr ansitionInception Constr uction

Architecture and Iterations

Use case

Design

Deployment

Implementation

Content

Patterns

� A pattern is a solution to a problem in a

context

� A pattern codifies specific knowledgecollected from experience in a domain

� All well-structured systems are full of

patterns ± Idioms

± Design patterns

± Architectural patterns

Mechanisms

Screws yBrakes

Keys yPipes

Rivets yValves

Bearings ySprings

Pins, axles, shafts yCranks and rodsCouplings yCams

Ropes, belts, and chains yPulleys

Friction wheels yEngaging gears

Toothed wheelsFlywheels

Levers and connecting rods

Click wheels and gears

Ratchets

daVinci

Design patterns

� Creational patterns ± Abstract factory

± Prototype

� Structural patterns ± Adapter

± Bridge

± Proxy

� Behavioral patterns ± Chain of responsibility

± Mediator

± Visitor

� Mechanisms are the soul of an

Design Patterns

Gamma et al

Modeling a design pattern

Modeling a design pattern (cont.)

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