Oopsla07 tooldemo.ppt
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This presentation summarizes the Ptidej tool for evaluating and enhancing object-oriented programs through the identification of design patterns and defects. It provides examples of identifying the Composite pattern and Blob/God Class and Spaghetti Code defects in code. The presentation outlines Ptidej's capabilities for reverse engineering open-source code and identifying patterns and defects. It notes Ptidej is based on a PADL meta-model and uses reflection. The presentation is given by researchers from the University of Montreal and encourages questions.
![4/??
Example of a Design Pattern
Composite Motif [GoF 94]](https://image.slidesharecdn.com/oopsla07tooldemo-171205033737/85/Oopsla07-tooldemo-ppt-4-320.jpg)
![5/??
Example of a Design Defect
Blob (God Class) [Brown 98]
“Procedural-style design leads to
one object with a lion’s share of
the responsibilities while most
other objects only hold data or
execute simple processes”
– Large controller class
– Many fields and methods with a
low cohesion*
– Dependent on the data stored in
associated data classes
*How closely the methods are
related to the instance variables
in the class](https://image.slidesharecdn.com/oopsla07tooldemo-171205033737/85/Oopsla07-tooldemo-ppt-5-320.jpg)
![6/??
Example of a Design Defect
Spaghetti Code [Brown 98]
“Ad hoc software structure
makes it difficult to extend and
optimize code”
– Procedural thinking in OO
programming
– Lack of structure : no
inheritance, no reuse, no
polymorphism
– Classes with procedural names
– Long methods process oriented
with no parameters and low
cohesion
– Use of class and global variables
for processing](https://image.slidesharecdn.com/oopsla07tooldemo-171205033737/85/Oopsla07-tooldemo-ppt-6-320.jpg)
Oopsla07 tooldemo.ppt
- 1. Naouel Moha and Yann-Gaël Guéhéneuc © Moha and Guéhéneuc 2007 This presentation has been given at OOPSLA, the 25th of October 2007, Montreal, Quebec, Canada. 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 & DECOR: Identification of Design Patterns and Design Defects
- 2. 2/?? Outline Ptidej in a Nutshell Examples of Design Patterns and Defects Demo – Reverse Engineering of an open-source program – Identification of Design Motifs – Identification of Design Defects Main Characteristics
- 3. 3/?? Ptidej in a Nutshell Ptidej: Pattern Trace Identification, Detection, and Enhancement in Java Tool suite to develop theories and methods to evaluate and improve the quality of object- oriented programs by promoting the use of idioms, design patterns, and architectural patterns – Research – Education
- 4. 4/?? Example of a Design Pattern Composite Motif [GoF 94]
- 5. 5/?? Example of a Design Defect Blob (God Class) [Brown 98] “Procedural-style design leads to one object with a lion’s share of the responsibilities while most other objects only hold data or execute simple processes” – Large controller class – Many fields and methods with a low cohesion* – Dependent on the data stored in associated data classes *How closely the methods are related to the instance variables in the class
- 6. 6/?? Example of a Design Defect Spaghetti Code [Brown 98] “Ad hoc software structure makes it difficult to extend and optimize code” – Procedural thinking in OO programming – Lack of structure : no inheritance, no reuse, no polymorphism – Classes with procedural names – Long methods process oriented with no parameters and low cohesion – Use of class and global variables for processing
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- 9. 9/?? Main Characteristics Today – 30 JDT projects – 200 packages – 1,150 classes – 80,000 LOC Contributions of several master and Ph.D. students Used in several publications, see www.ptidej.net/publications
- 10. 10/?? Main Characteristics PADL Meta-model – Pattern and Abstract- level Description Language – Meta-model to describe object- oriented software systems and patterns
- 11. 11/?? Main Characteristics PADL meta-model – Composite – Observer – Visitor – (Singleton) Ptidej framework – Observer – Builder – Template Method – Abstract Factory – (Singleton) See Yann-Gaël Guéhéneuc ; Ptidej: Promoting Patterns with Patterns ; BSUP, in 2005
- 12. 12/?? Main Characteristics Reflection – Meta-model constituents – Design motifs, design defects – PADL analyses – Ptidej UI analyses – Ptidej Viewer extensions
- 13. 13/?? Main Characteristics Some hot spots – IFactory to add new constituents – IBuilder to draw graphic representations – IPADLAnalysis to add new PADL analyses – IDesignMotif to add new design motifs – IPtidejAnalysis to add new Ptidej analyses – IExtension to extend the UI – IWindow to add new window in the UI
- 14. 14/?? Thanks for your Attention… … Ready for a live demo! mohanaou@iro.umontreal.ca guehene@iro.umontreal.ca www.ptidej.net