1. A code metric tool for Software Engineering
Teng Li

2. Software Measurement Why? Mature technologies Larger scale
Pursue better control and management
Needs for maintain and refractory

3. Software Measurement What?
Measurement is a process to assign numbers for each attribute or factor of an object or an event according to rules.
Key: rules, attributes
We use measurement to get quantified assessment for a software.

4. Software Metrics Metric A metric is a measurement function. Software
Data
Numerical data
Metric

5. Metric for code
Code analysis can reflect potential problems in SW design.
Code quality is related to future maintenance and reuse.
Code metric can help developers to avoid fatal design problem and mitigate risks.
E.g. Visual Studio Code Metrics
Sourceforge - Metrics 1.3.6

6. Metric for code Metric Step:
Abstract common flaws in coding, like a data class, useless method or duplicated code fragment.
Define a metric rule, like fetch similarity of two code fragment.
Associate a metric rule with a abstract code characteristic.
Get metric value via computing

7. Metric for code Framework UI Core computing Data storage Software
Choose Model
Metric result
Collected data
Factor computing
Repository
Model Template
Result UI
Core computing
Data storage

8. Code Bad Smells Object-Oriented design
To indicate problematic classes or method
Use metrics to provide evidence
E.g.
Data Class
God Class
God Method
Feature Envy

9. My metric tool Eclipse based plug-in
Parse code and generate AST(Abstract syntax tree)
Using JDT to get elements in a compile unit
Computing values to indicate potential problematic code(bad smells)

10. My metric tool Eclipse based plug-in
Parse code and generate AST(Abstract syntax tree)
Using JDT to get elements in a compile unit
Computing values to indicate potential problematic code(bad smells)

15. Thanks
Questions?