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      FORMALISING DESIGN PATTERNS

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      Proceedings of the BCS-FACS Northern Formal Methods Workshop (NFM)

      Northern Formal Methods

      23-24 September 1996

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          Abstract

          This paper views design patterns [5] as a transformation from a “before” system consisting of a set of classes (often a single unstructured class) into an “after” system consisting of a collection of classes organised by the pattern. To prove that these transformations are formal refinements, we adopt a version of the Object Calculus [4] as a semantic framework. We make explicit the conditions under which these transformations are formally correct. We give some additional design pattern transformations which have been termed “annealing” in the VDM++ world, which include the introduction of concurrent execution into an initially sequential system. We show that these design patterns can be classified on the basis of a small set of fundamental transformations which are reflected in the techniques used in the proof of their correctness.

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          Author and article information

          Conference
          September 1996
          September 1996
          : 1-20
          Affiliations
          Dept. of Computing, Imperial College, 180 Queens Gate,

          London, SW7 2BZ, UK
          On secondment from Information Systems Dept., Rutherford Appleton Laboratory
          Dept. of Computing, Imperial College, 180 Queens Gate,

          London SW7 2BZ
          Article
          10.14236/ewic/FA1996.11
          © K. Lano et al. Published by BCS Learning and Development Ltd. Proceedings of the BCS-FACS Northern Formal Methods Workshop, Ilkley, UK

          This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

          Proceedings of the BCS-FACS Northern Formal Methods Workshop
          NFM
          Ilkley, UK
          23-24 September 1996
          Electronic Workshops in Computing (eWiC)
          Northern Formal Methods
          Product
          Product Information: 1477-9358BCS Learning & Development
          Self URI (journal page): https://ewic.bcs.org/
          Categories
          Electronic Workshops in Computing

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