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Диаграммы классов в Rose. (Тема 7)
1.
Тема 7: Диаграммы классов2. Where Are We?
What are class diagrams?Elements of the class diagram
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3. What Are Class Diagrams?
A class diagram shows a set of classes,interfaces, and their relationships.
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4. What Are Class Diagrams?
You will use input artifacts, including theinteraction diagrams, to develop and refine
the class diagram.
Supplementary
Specifications
Class Diagram
Design
Guidelines
Interaction Diagrams
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5. What Are Class Diagrams?
Class diagrams show the static view of thesystem and are modeled in the Logical View
under the appropriate use-case realization.
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6. What Are Class Diagrams?
A VOPC class diagram shows a use-caserealization’s participating classes and the
relationships among those classes.
It shows all classes whose instances
collaborate to perform the use case and
their relationships.
It ensures consistency in use-case
implementation across subsystem
boundaries.
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7. Where Are We?
What are class diagrams?Elements of the class diagram
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8.
Elements of a Class DiagramA class diagram is made up of the following
basic elements
Classes
Relationships
• Associations
• Aggregations
• Generalizations
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9.
ClassesA class is a set of objects that share the
same attributes, operations, relationships,
and semantics.
In the UML, a class is represented by a
compartmentalized rectangle.
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10.
RelationshipsA relationship is a semantic connection
among elements.
A class diagram has three types of
relationships
Associations
Aggregate Associations
Generalizations
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11.
AssociationsAn association is the most general
relationship and indicates communication
only.
In the UML, an association is represented
by a solid line with or without an arrow.
Association Relationships
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12.
Aggregate AssociationsAn aggregate association is a type of
association where a whole is related to its
part(s).
In the UML, an aggregation is represented
by a solid line with or without an arrow on
one end and hollow diamond at the end of
the aggregate (whole).
Aggregate Relationships
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13.
Association SpecifiersAssociations in a class diagram can be
further defined by
Association Names
Role Names
Multiplicity
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14.
Association NamesAn association name is a label that clarifies
the meaning of the association.
In Rose, the association name is placed
along the middle of the association line.
Association Name
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15.
Role NamesA role name is a label that specifies the
“face” the class plays in an association.
In Rose, the role name is placed along the
association line nearest the class it
modifies.
Role Name
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16.
MultiplicityMultiplicity is the number of instances a
class relates to an instance of another
class.
Multiplicity is defined at both ends of the
association line.
Multiplicity
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17.
GeneralizationsA generalization is a parent/child
relationship where one class shares
the structure and behavior of one or more
classes.
In the UML, a generalization relationship is
represented by a solid line with a hollow
arrow.
Generalization Relationship
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18. Review
1.2.
3.
4.
5.
Define a class diagram.
What is a VOPC class diagram?
Name two elements of a class diagram.
What is an aggregate association?
When should you use role
names?
6. What is multiplicity?
7. What is a generalization?
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