Category: 2.6 Architecture and Design
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Talk Slides: Design Pattern Density Defined
Here the slides for my OOPSLA Onward! 2009 talk on “Design Pattern Density Defined.” First the abstract: Design pattern density is a metric that measures how much of an object-oriented design can be understood and represented as instances of design patterns. Expert developers have long believed that a high design pattern density implies a high…
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Design Pattern Density Defined
Abstract: Design pattern density is a metric that measures how much of an object-oriented design can be understood and represented as instances of design patterns. Expert developers have long believed that a high design pattern density implies a high maturity of the design under inspection. This paper presents a quantifiable and observable definition of this…
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Design Pattern Density and Design Maturity
JUnit is a widely-adopted unit testing framework for Java, developed by Kent Beck and Erich Gamma. In their discussion of JUnit 3.8’s design, the authors state: Notice how TestCase, the central abstraction in the framework, is involved in four patterns. Pictures of mature object designs show this same ‘pattern density’. The star of the design…