Affordable Access

Using a follow-on survey to investigate why use of the visitor, singleton and facade patterns is controversial.

ACM Press
Publication Date
  • Design


Context: A previous study has shown that software devel- opers who are experienced with using design patterns hold some con icting opinions about three of the more popular design patterns: Facade, Singleton and Visitor. Aim: To identify the characteristics of these three patterns that have caused them to generate such differing views. Method: We employed a qualitative follow-on survey of those developers who had taken part in the earlier survey about design patterns. Results: We received 46 usable responses from a possible total of 188, with nearly 85% of respondents having six or more years of experience with design patterns. Of these, 27 also provided comments and descriptions of experiences about the patterns, which we categorised. Conclusions: All three patterns can easily be misused and in each case, the consequences of misuse are regarded as being particularly significant.

There are no comments yet on this publication. Be the first to share your thoughts.


Seen <100 times