Classifier The generalization of class Classifiers represent nouns

Classifier The generalization of class

Classifiers represent nouns • Classes • Objects • But also non-CS objects – Organizations – People

Symbol A simple rectangle with a name A partitioned rectangle

Classifier Names • Simple - my. Class • Path – java: : awt: : Rectangle • Name in italics means Abstract

Name Attributes Operations Additional Partitions Responsibilities Exceptions

Attribute Syntax • [visibility] name [multiplicity] [: type] [= initial value] [{property string}] • Visibility – Public “+”, Private “-”, protected “#” • Multiplicity – “[0. . 1]”, “[1. . *]” • Class Attribute (e. g. static) is underlined • Properties: “frozen”, “add. Only”

Operation Syntax • [visibility] name [(parameter-list)] [: type] [= initial value] [{property string}] • Parameter-list items: – [direction] name : type [= default value] – Directions is “in”, “out”, “inout” • Properties – “is. Query”, “sequential”, “guarded”, “concurrent”

Stereotyping <<interface>> Rs. Client

Relationships with Classifiers Generalization <<interface>> Association (navigation) Realization

Associations Mult. Role Directionality with an arrow Composition (when solid) Aggregation

Dependency <<interface>>

Kinds of Dependency (Stereotypes) • • • Friend instance. Of Use Include Extend Call

Classifiers • Appear in many of the nine diagrams • Syntax shown here is also extend in consistent ways to other diagrams and symbols