Ptidej: Promoting Patterns with Patterns

1. Yann-Gaël Guéhéneuc
© Guéhéneuc 2005
Ptidej Team – OO Programs Quality Evaluation and Enhancement using Patterns
Group of Open, Distributed Systems, Experimental Software Engineering
Department of Informatics and Operations Research
University of Montreal
GEODES
Ptidej: Promoting
Patterns with Patterns
1st ECOOP Workshop on Building Systems using Patterns
Glasgow, Scotland
2005/07/26

2. 2/16
The Ptidej project (1/2)
n Tool suite to evaluate and to enhance
the quality of OO programs
n Promotion of patterns, at language-,
design-, and architectural-levels
n In particular
– A meta-model to describe programs,
design motifs (solutions of patterns)
– An explanation-based constraint solver to
identify micro-architectures

3. 3/16
The Ptidej project (2/2)
nUIandtypicaluse

4. 4/16
The Ptidej tool suite
n A meta-model, PADL
n A library of models of design motifs
n Parsers for AOL, AspectJ, C++, Java
n A library of metrics, POM
n A library of generators and analyses
n An explanation-based constraint solver, JPtidejSolver
n A dynamic analyser for Java, Caffeine
n A library of graphic widgets, Ptidej UI
n Several user-interfaces, Ptidej UI Viewers (including
a new Swing-based interface)

5. 5/16
Architecture
n Layered architecture
– Ptidej UI Viewers (Applet, AWT, Swing, Eclipse)
– Ptidej UI Viewer and Ptidej UI Viewer Extensions
– Ptidej UI Primitives (AWT, SWT)
– Ptidej UI
– PADL Creators (AOL, AspectJ, C++, Java), PADL
Analyses and POM
– PADL
– CPL

6. 6/16
Design (1/2)
n Use of design patterns
– Abstract Factory
– Builder
– Composite
– Observer
– Visitor

7. 7/16
Design (2/2)
n Use of design patterns
– Abstract Factory
– Builder
– Composite
– Observer
– Strategy

8. 8/16
Idioms
n Programming language
n Language of programming
n Formatting
n Commenting
n Naming
n Imports
n Variables, parameters declarations
n Qualification
n final keyword
n Iterator design pattern
n finally keyword
n Stricter compilation rules

9. 9/16
Discussions (1/7)
n Claims on patterns?
– Flexibility
– Reusability
– Understandability
from the software engineers’ viewpoints
– Understandability?

10. 10/16
Discussions (2/7)
n System of patterns?
– Collaborations of patterns without
conflicting intents and implementations
– Formalisations?

11. 11/16
Discussions (3/7)
n Composition of patterns?
– Possibility of composition
– Flexibility
– Reusability
– Understandability
of the resulting compositions
– Akin to systems of patterns?

12. 12/16
Discussions (4/7)
n Choice of patterns?
– Piecemeal growth
– Needs, maintenance
– Knowledge of existing patterns?
– Akin to formalisations?

13. 13/16
Discussions (5/7)
n Building a system of patterns?
– Piecemeal growth
– Needs, maintenance
– Akin to choice of patterns?
– DPTutor by Olivier Motelet…

14. 14/16
Discussions (6/7)
– DPTutor by Olivier Motelet?

15. 15/16
Discussions (7/7)
n Integrating patterns with traditional
development cycles?
– Reverse-engineering
– Refactorings
– Seamless integration?

16. 16/16
Position
n Terminology
n Formalisation
– Choice
– Selection
– Systems
n Identification
n Implementation/integration