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ITEC 370

ITEC 370. Lecture 11 Design. Review. Questions? Today! Rough draft of your SRS document Introduction, Features (Functional / Non-functional), Interfaces Prepare for presenting the next week UML UML by shotgun approach What are the reasons for using UML?

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ITEC 370

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  1. ITEC 370 Lecture 11 Design

  2. Review • Questions? • Today! • Rough draft of your SRS document • Introduction, Features (Functional / Non-functional), Interfaces • Prepare for presenting the next week • UML • UML by shotgun approach • What are the reasons for using UML? • What are some dangers of using UML? • How do you think UML will be used in your project?

  3. Objectives • Design patterns • Not by shotgun approach

  4. Design patterns • What is a design pattern in your own words? • What are they used for? • Have you ever used one before? • How useful was it?

  5. Definition In software engineering, a design pattern is a general reusable solution to a commonly occurring problem within a given context in software design. A design pattern is not a finished design that can be transformed directly into code. It is a description or template for how to solve a problem that can be used in many different situations. Patterns are formalized best practices that the programmer must implement themselves in the application. wikipedia

  6. Example pattern • Command • Used to call methods on classes • Parts • Client • Invoker • Receiver • Goal • Middleman that handles details between client and functionality • What are some of the uses of this?

  7. Graphically

  8. Example • mQuiz • Mobile quiz app • Quick, functional system • Used for a couple of semesters in ITEC 120

  9. Code • How did the command pattern was used to help build this system • Available on sourceforge if you want it

  10. Review • Design patterns • Command pattern • Definition • Example

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