Download Applying Use Case Driven Object Modeling with UML: An by Doug Rosenberg PDF

By Doug Rosenberg

Located among the very huge Rational Unified strategy and the very small severe programing strategy, the ICONIX method uses the Unified Modeling Language. The authors evaluation this strategy which attracts on most of these methodologies, and convey truth to idea through a working web book shop instance and routines. Appendices contain a part of a version file (available in complete from an auxiliary internet site), and use case documentation. A helping workbook and CD-ROM also are to be had. either authors are with ICONIX software program Engineering, Inc.

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Extra info for Applying Use Case Driven Object Modeling with UML: An Annotated e-Commerce Example

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You should also do a grammar check on your use text during requirements review. A use case is most effectively stated from the perspective of the user as a set of present-tense verb phrases in active voice. ). However, as we just said, use cases should state the actions that the user performs and the system’s responses to those actions, and this kind of text is only effective when it’s stated in active voice. Another critical aspect of use case modeling involves alternate courses of action. As we explained in Chapter 3, it’s very important to think of all possible alternate courses of action for each use case wherever possible, which should be a large majority of the time, by asking, “What else can happen?

When we get to interaction modeling, however, we do have good information (at least we hope to). We describe interaction modeling in Chapter 7. Optimize your code for reusability before making sure you’ve satisfied the user’s requirements. The more general your objects and classes, the higher the probability that you’ll be able to reuse those objects and classes for other projects. And a complete class is one that is theoretically reusable in any number of contexts. However, to achieve reusability and completeness, you need to consider both attributes and operations, and we just told you why you shouldn’t be assigning operations to classes during domain modeling, so it’s not wise to overdo your efforts to make classes reusable when you’re doing high-level class diagrams.

The first question is: What objects do we need for each of these use cases? ) We’ll use the robustness analysis technique originally developed by Ivar Jacobson to help answer this question. A robustness diagram is similar to a UML collaboration diagram, in that it shows the objects that participate in the scenario and how those objects interact with each other. Robustness analysis is not exactly a core part of UML; instead, it requires the use of some stereotypes. Robustness analysis was part of Jacobson’s Objectory method; it’s an informal, “back of the envelope” kind of analysis that’s of enormous value in helping you refine use case text and discover objects that are needed, but that didn’t make it into the domain model.

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