Slide 1

Structural model: a formal way of representing the ______

that are used and created by a business system.

conceptual model design model (design phase)

Class: general template that we use to create specific ______ or ______

in the application domain

application domain class

Attribute: a piece information that is relevant to the description of the

class

Operation: behavior of the class

converted to ________ (related to implementation)

domain specific operation

Ch.6 Class Diagrams

Slide 2

Relationships:

- Generalization

Subclass inherits _________________ of their superclass

contains ___________________________.

a-kind-of relationship

cf. specialization

- Aggregation

Composition relationship

a-part-of or a-member-of

- Association

Patient schedules an appointment.

Patient is a-pat-of an appointment? Y/N

semantic difference

Slide 3

Class-Responsibility-Collaboration Card (CRC Card)

Responsibility:

- Knowing knows the value of its _______ and its _______

- Doing can executes its _______

Collaboration:

Client object

Server object

Contract

Elements of CRC Card: Fig. 6-1

Sam

ple

CR

C C

ard

Slide 5

Class Diagrams

Elements of a Class Diagram:

Class: class name

Attributes : derived, visibility(public, protected, private)

Operation

Relationships: association multiplicity

generalization

aggregation multiplicity

Fig. 6-2

Sample Class Diagram

Cla

ss D

iag

ram

Syn

tax

Sample Association

Multiplicity

Sam

ple

Associtio

n C

lass

Sample Generalization

Slide 12

Object Diagram

Instantiation of all or part of a class diagram

instantiation: creates an instance of a class with a set of

appropriate attribute value.

Fig. 6-10 Example Object Diagram

Sample Object Diagram

Slide 14

Creating CRC Cards and Class Diagram

(1) Object Identification

1. Textual Analysis

2. Common Object List

3. Patterns

(2) Building CRC Cards and Class Diagram

1. Create CRC Cards

2. Examine Common Object List

3. Role-Play CRC Cards

4. Create the Class Diagram

5. Review the Class Diagram

6. Incorporate Patterns

7. Review the Model

fig_06_17

fig_06_18