19.5. Creating a NextGen POS DCD
Identify Software Classes and Illustrate Them
The first step in the creation of DCDs as part of the solution model is to identify those classes that participate in the software solution. These can be found by scanning all the interaction diagrams and listing the classes mentioned.
For the POS application, these are:
| Register | Sale |
| ProductCatalog | ProductSpecification |
| Store | SalesLineItem |
| Payment |
The next step is to draw a class diagram for these classes and include the attributes previously identified in the Domain Model that are also used in the design (see Figure 19.3).
Figure 19.3. Software classes in the application.
Note that some of the concepts in the Domain Model, such as Cashier, are not present in the design. ...
Get Applying UML and Patterns: An Introduction to Object-Oriented Analysis and Design and the Unified Process, Second Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
