Measuring the Effects of Design Patterns by David Kemp
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Code metrics are used to measure properties of software like size, complexity, and coupling. Applying design patterns can change these metrics. The document discusses limitations of metrics and provides examples of metric changes after refactoring code to use design patterns like Mediator, Bridge, and Visitor. It also lists tools for calculating metrics and references on the topic.
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Measuring the Effects of Design Patterns by David Kemp
- 1. Code Metrics & Design Patterns Measuring the effects of Design Patterns David Kemp Melbourne Patterns, March 2007
- 2. Code Metrics & Design Patterns What are code metrics? Example metrics. Limitations. Examples of measuring before & after refactoring to a pattern. Metrics tools. References
- 3. Code Metrics Measuring software: Size Complexity Coupling and cohesion (Not to be confused with project metrics)
- 4. Examples Fanout % Code duplication …
- 5. Limitations Not all aspects of design are measurable Opinions differ on “good design” Unintended effects of measuring
- 6. Code Metrics & Design Patterns Examples taken from: Brian Huston, The effects of design pattern application on metric scores. The Journal of Systems and Software, 2001.
- 7. Mediator
- 8. Bridge
- 9. Visitor
- 12. References & Resources Books & Articles: Brian Huston, The effects of design pattern application on metric scores. The Journal of Systems and Software, 2001. Michele Lanza, Radu Marinescu, Object-Oriented Metrics in Practice Tools: Eclipse Metrics (http://www.eclipseplugincentral.com/) Complexian (http://www.martyandrews.net/resources/complexian.html) Simian (http://www.redhillconsulting.com.au/products/simian/) IPlasma (http://loose.upt.ro/iplasma/). JHawk (http://www.virtualmachinery.com/jhawkprod.htm) Checkstyle (http://checkstyle.sourceforge.net/)