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Design Pattern Modelling and Instantiation Using DMPL

Instructor:Ku-Yaw Chung

Student:Han-Chung Lee

Pattern Oriented-Design

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Author & Source

Author: David Mapelsden John Hosking John Grundy

Source: ACM International Conference Proceedin

g Series; Vol. 21

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Outline

Introduction Modelling Design Pattern Soluations Design Pattern Instantiation and Realis

ation Tool Support:DPTool Conclusions

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Introduction

A visual language for modelling design pattern soluations

Defines a metamodel and a notation Can be used as a stand-alone modelli

ng language or in conjunction with UML to also model solution instances within UML object models

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Core concepts of DPML

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Outline

Introduction Modelling Design Pattern Soluations Design Pattern Instantiation and Realis

ation Tool Support:DPTool Conclusions

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Modelling Design Pattern Soluations

Models design pattern soluations as a collection of participants

A participants represents a structurally significant feature of a design pattern, that when instantiated, will be linked to objects from the object model to realise the pattern.

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Basic DPML notation

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An Example

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Outline

Introduction Modelling Design Pattern Soluations Design Pattern Instantiation and Realis

ation Tool Support:DPTool Conclusions

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Design Pattern Instantiation and Realisation Proxy’ elements are participants an

d relations inherited from the base design pattern solution and are therefore immutable in the instance

‘Real’ elements are participants and relations added to a design pattern instance to tailor that instance.

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Instantiation Diagram Notation

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GUIFactory UML object model

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AbstractFactory Pattern

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Outline

Introduction Modelling Design Pattern Soluations Design Pattern Instantiation and Realis

ation Tool Support: DPTool Conclusions

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Tool Support: DPTool As mentioned earlier the DPML was de

signed specifically to facilitate the provision of tool support.

They have successfully implement a prototype DPML CASE tool they call DPTool.

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Benefits of DPTool Consistent, multiple views of UML and DPML. Model management mechanisms, so user can

create, save and reload UML and DPML models. An automatic design pattern instantiation

mechanism, to create pattern instances from design patterns

An automatic model verification mechanism ensures the UML object model and all design pattern instances within that object model

An automates consistency mechanism between design pattern instances and base design patterns.

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Three diagrams implemented in the prototype DPML tool

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Pattern and instance and validation manager examples

Figure 10. Pattern and instance manager and pattern validation manager examples

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Outline

Introduction Modelling Design Pattern Soluations Design Pattern Instantiation and Realis

ation Tool Support:DPTool Conclusions

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Conclusions

Support for design pattern composition to create other patterns

Support for specification of dynamic aspects of design patterns

Extending the pattern concept Support for classification scheme for

design patterns