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Chapter 13: Class DiagramChapter 19 in Applying UML and Patterns Book.

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Overview

What is Class Diagram ?

The different between Domain Model and Design Model.

How to build UML Class Diagram (Class, Attribute, Relationship).

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What is Class Diagram ?

A class diagram shows the existence of classes and their relationships in the logical view of a system.

UML modeling elements in class diagrams:

Classes and their structure and behavior.

Association, aggregation, dependency, and inheritance relationships.

Multiplicity and navigation indicators.

Role names.

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Domain Model vs. Design Model Classes

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Example DCD

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Creating NextGen POS DCD

Identify all the classes participating in the software solution. Do this by analyzing the interaction diagrams. Draw them in a class diagram.

Duplicate the attributes from the associated concepts in the Domain Model.

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Creating NextGen POS DCD

Add method names by analyzing the interaction diagrams.

The methods for each class can be identified by analyzing the interaction diagrams.

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Creating NextGen POS DCD

Add type information to the attributes and methods.

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Method Names - Multiobjects

The find message to the multiobject should be interpreted as a message to the container/collection object.

The find method is not part of the ProductSpecification class.

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Adding Navigability & Dependency Relationships