Slide 1 Systems Analysis and Design With UML Systems Analysis and Design With UML 2.0 2.0 An Object An Object- Oriented Approach, Second Edition Oriented Approach, Second Edition Chapter 2: Introduction to Object-Oriented Systems Analysis and Design with the Unified Modeling Language, Version 2.0
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Slide 1
Systems Analysis and Design With UMLSystems Analysis and Design With UML2.02.0
An ObjectAn Object--Oriented Approach, Second EditionOriented Approach, Second Edition
Chapter 2: Introduction to Object-OrientedSystems Analysis and Design with the UnifiedModeling Language, Version 2.0
Slide 2
Objectives
Understand the basic characteristicsof object-oriented systems.Be familiar with the UnifiedModeling Language (UML), Version2.0.Be familiar with the Unified Process.Understand a minimalist approachto object-oriented systems analysisand design.
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Basic Characteristics ofObject Oriented Systems
Classes and ObjectsMethods and MessagesEncapsulation and InformationHidingInheritancePolymorphism and DynamicBinding
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Classes and Objects
Class –Template to definespecific instances or objectsObject –Instantiation of a classAttributes –Describes theobjectBehaviors –specify what objectcan do
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Classes and Objects
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Methods and Messages
Methods implement an object’sbehavior
Analogous to a function orprocedure
Messages are sent to triggermethods
Procedure call from one object tothe next
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Messages and Methods
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Encapsulation andInformation Hiding
Encapsulationcombination of data and process intoan entity
Information HidingOnly the information required to use asoftware module is published to theuser
Reusability KeyUse an object by calling methods
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Inheritance
Superclasses or general classesare at the top of a hierarchy ofclassesSubclasses or specific classesare at the bottomSubclasses inherit attributesand methods from classeshigher in the hierarchy
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Class Hierarchy
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Inheritance
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Polymorphism and DynamicBinding
PolymorphismA message can be interpreteddifferently by different classes ofobjects
Dynamic BindingSometimes called late bindingDelays typing or choosing a method foran object until run-time
Static BindingType of object determined at compiletime
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Polymorphish & Encapsulation
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The Unified ModelingLanguage, Version 2.0
Structure DiagramsBehavior DiagramsExtension MechanismsDevelopers
Grady BoochIvar JacobsonJames Rumbaugh
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Structure Diagram
Structure Diagrams includeClassObjectpackageDeploymentComponentComposite structure diagrams
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UML 2.0 Diagram Summary
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Structure Diagrams
Classrelationship between classes
ObjectRelationships between objects
PackageGroup UML elements together toform higher level constructs
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Structure Diagrams Cont.
DeploymentShows the physical architecture andsoftware components of system
ComponentPhysical relationships among softwarecomponents
Composite StructureIllustrates internal structure of a class
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Activity DiagramsActivity
Illustrates business workflowsSequence
Time-based ordering Behavior of objectsactivities in a use case
CommunicationCommunication among a set of collaboratingobjects of an activity
Interaction Overview TimingOverview of flow of control of a process
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State Machines
Behavioral State MachineExamines behavior of one class
Protocol State MachineShows dependencies of differentinterfaces of a class
Use-CaseCaptures business requirementsIllustrates interaction between systemand environment
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Use Case Diagrams
Captures Business requirementsIllustrates interaction between asystem and its environment
Includes end userAny external system that interacts withits information system
Documents and clarifiesrequirements of system beingmodeled
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Object Oriented SystemsAnalysis and Design
• Use-case driven• Architecture Centric• Iterative and Incremental• The Unified Process
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Engineering Workflows
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Supporting Workflows
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A Minimalist Approach
Benefits of Object-OrientedSystems Analysis and DesignExtensions of the UnifiedProcessThe Minimalist Object-OrientedSystems Analysis and DesignApproach
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Benefits of the Object Approach
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MOOSAD Approach
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Basic Characteristics ofObject Oriented Systems
Identifying business valueAnalyze feasibilityDevelop workplanStaff the projectControl and direct projectRequirements determinationFunctional modelingStructural modelingBehavioral modelingMoving on to design
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UML Summary
Class and method designData management layer designHuman computer interaction layerdesignPhysical architecture layer designConstructionInstallationOperations and support
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Summary
Basic characteristics of anobject oriented systemUnified modeling systemObject oriented SystemsAnalysis and DesignMinimalist approach to Objectoriented systems analysis anddesign with UML
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