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IBM Software Group ® Essentials of Visual Modeling with UML 2.0 Module 6: Class
Содержание
- 1. IBM Software Group ® Essentials of Visual Modeling with UML 2.0 Module 6: Class
- 2. Objectives Describe the static view of the system
- 3. Where Are We?Class diagramsClass relationshipsAssociationAggregationGeneralization
- 4. What Is a Class Diagram?Статическое описание системыФормаЗакрытияРегистрации+
- 5. Class Diagram UsageWhen modeling the static view
- 6. Example: Class DiagramIs there a better way to organize class diagrams?CloseRegistrationFormLoginFormProfessorBillingSystemCloseRegistrationControllerRegisterForCoursesFormCourseCourseCatalogSystemStudentRegistrationControllerCourseOfferingSchedule
- 7. A general purpose mechanism for organizing elements
- 8. Example: Registration PackageРегистрацияФормаЗакрытияРегистрацииКонтроллерЗакрытияРегистрацииФормаРегистрацииНаКурсКонтроллеРегистрации
- 9. Class diagramsClass relationshipsAssociationAggregationGeneralizationWhere Are We?
- 10. What Is an Association?The semantic relationship between
- 11. Example: What Associations Can You Find?: CourseOffering
- 12. What Is Multiplicity?Multiplicity is the number of
- 13. Multiplicity Indicators2..40..11..*0..*1*2, 4..6UnspecifiedExactly OneZero or MoreZero or
- 14. Example: MultiplicityФормаРегистрацииНаКурсПредложКурсыРасписание0..40..*Студент0..*1КонтроллерРегистрации11110..10..10..1
- 15. Class diagramsClass relationshipsAssociationAggregationGeneralizationWhere Are We?
- 16. What Is an Aggregation?A special form of
- 17. Example: AggregationRegisterForCoursesFormCourseOfferingРасписание0..40..*Студент0..*1RegistrationController11110..10..10..1
- 18. Class diagramsClass relationshipsAssociationAggregationGeneralizationWhere Are We?
- 19. Review: What Is Generalization?A relationship among classes
- 20. Example: Single InheritanceOne class inherits from another.CheckingSavingsСуперклассПодкласс Связь ОбобщенияПотомкиПредокAccount- balance- name- number+ withdraw()+ createStatement()
- 21. Example: Multiple InheritanceA class can inherit from
- 22. What does a class diagram represent?What benefits
- 23. ExerciseGiven:A set of classes and their relationshipsDraw:A class diagram
- 24. Слайд 24
- 25. Скачать презентанцию
Objectives Describe the static view of the system and show how to capture it in a model.Demonstrate how to read and interpret a class diagram.Model an association and aggregation and show how
Слайды и текст этой презентации
Слайд 2Objectives
Describe the static view of the system and show how
to capture it in a model.
Demonstrate how to read and
interpret a class diagram.Model an association and aggregation and show how to model it in a class diagram.
Model generalization on a class diagram.
Слайд 4What Is a Class Diagram?
Статическое описание системы
ФормаЗакрытия
Регистрации
+ открыть()
+ закрыть регистрацию()
Преподаватель
-
имя
- табельныйНомер :UniqueId
- датаНайма
- статус
- дисциплина
- максНагрузка
+ выставитьОценки()
+ принятьКурс()
+ установитьМаксНагрузку()
+
взятьОтпуск()+ учитьКласс()
КонтроллерЗакрытия
Регистрации
+ регистрация открыта?()
+ закрыть регистрацию()
Слайд 5Class Diagram Usage
When modeling the static view of a system,
class diagrams are typically used in one of three ways,
to model:The vocabulary of a system
Collaborations
A logical database schema
Слайд 6Example: Class Diagram
Is there a better way to organize class
diagrams?
CloseRegistrationForm
LoginForm
Professor
BillingSystem
CloseRegistrationController
RegisterForCoursesForm
Course
CourseCatalogSystem
Student
RegistrationController
CourseOffering
Schedule
Слайд 7A general purpose mechanism for organizing elements into groups.
A model
element that can contain other model elements.
A package can be
used:To organize the model under development
As a unit of configuration management
Review: What Is a Package?
Артифакты
Университета
Слайд 8Example: Registration Package
Регистрация
ФормаЗакрытия
Регистрации
КонтроллерЗакрытия
Регистрации
ФормаРегистрацииНаКурс
КонтроллеРегистрации
Слайд 10What Is an Association?
The semantic relationship between two or more
classifiers that specifies connections among their instances.
A structural relationship
specifying that objects of one thing are connected to objects of another thing.Курс
Студент
Расписание
Слайд 11Example: What Associations Can You Find?
: CourseOffering
: RegistrationController
: Schedule
: Student
: PrimaryScheduleOfferingInfo
8: any conflicts?( )
: RegisterForCoursesForm
2: submit schedule(
)4: submit( )
3: save( )
7: still open?( )
9: add student(Schedule)
5: is selected?( )
10: mark as enrolled in( )
6: has pre-requisites(CourseOffering)
1: submit schedule( )
: Student
Слайд 12What Is Multiplicity?
Multiplicity is the number of instances one class
relates to ONE instance of another class.
For each association, there
are two multiplicity decisions to make, one for each end of the association.For each instance of Professor, many Course Offerings may be taught.
For each instance of Course Offering, there may be either one or zero Professor as the instructor.
Преподаватель
ПредложКурсы
0..1
0..*
0..1
0..*
instructor
Слайд 13Multiplicity Indicators
2..4
0..1
1..*
0..*
1
*
2, 4..6
Unspecified
Exactly One
Zero or More
Zero or More
Zero or One
(optional value)
One or More
Specified Range
Multiple, Disjoint Ranges
Слайд 14Example: Multiplicity
ФормаРегистрацииНаКурс
ПредложКурсы
Расписание
0..4
0..*
Студент
0..*
1
КонтроллерРегистрации
1
1
1
1
0..1
0..1
0..1
Слайд 16What Is an Aggregation?
A special form of association that models
a whole-part relationship between the aggregate (the whole) and its
parts.An aggregation is an “is a part-of” relationship.
Multiplicity is represented like other associations.
Часть
0..1
1
Слайд 17Example: Aggregation
RegisterForCoursesForm
CourseOffering
Расписание
0..4
0..*
Студент
0..*
1
RegistrationController
1
1
1
1
0..1
0..1
0..1
Слайд 19Review: What Is Generalization?
A relationship among classes where one class
shares the structure and/or behavior of one or more classes.
Defines
a hierarchy of abstractions where a subclass inherits from one or more superclasses.Single inheritance
Multiple inheritance
Is an “is a kind of” relationship.
Слайд 20Example: Single Inheritance
One class inherits from another.
Checking
Savings
Суперкласс
Подкласс
Связь Обобщения
Потомки
Предок
Account
- balance
- name
-
number
+ withdraw()
+ createStatement()
Слайд 21Example: Multiple Inheritance
A class can inherit from several other classes.
Use
multiple inheritance only when needed and
always with caution!
FlyingThing
Animal
Horse
Wolf
Bird
Helicopter
Airplane
Multiple Inheritance
Слайд 22What does a class diagram represent?
What benefits do packages provide
to the model?
Define association, aggregation, and generalization.
How do you find
associations?What is multiplicity? What information does multiplicity provide the modeler?
Review
