Dependency Finder Tutorial
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A tutorial for Dependency Finder, a tool for analyzing compiled Java code. The tools allow you to view the "social network" inside the code.
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![Dependency Finder
Perl Regular Expressions
[A-Z] Capitals
w Alphanumeric [A-Za-z0-9_]
W Non-alpha [^A-Za-z0-9_]
w+ At least one alphanumeric
s Space, including tab and eol
s* Zero or more white space
. . as opposed to any character
33](https://image.slidesharecdn.com/dependencyfindertutorial-130220131332-phpapp01/85/Dependency-Finder-Tutorial-33-320.jpg)
Dependency Finder Tutorial
- 1. Dependency Finder Tutorial for Dependency Finder by Jean Tessier, March 30, 2004 1
- 2. Dependency Finder What are dependencies? Functioning of A requires the presence of B. A B source outbound inbound target dependent dependable UML: C1 C2 P1 P2 2
- 3. Dependency Finder Why Should I Care? Improve compilation time Smaller parts are easier on the compiler Verify encapsulation Validate design assumptions Indicator of complexity Assist with maintenance Impact of change 3
- 4. Dependency Finder Where Do They Come From? Class-to-Class P1 P2 Class inheritance via extends keyword C1 C2 Interface realization via F1 F2 implements keyword From fields and methods of the class 4
- 5. Dependency Finder Where Do They Come From? Feature-to-Class P1 P2 Field type C1 C2 Method parameter type Exception types in F1 F2 throws clause Local variable type 5
- 6. Dependency Finder Where Do They Come From? Feature-to-Feature P1 P2 Field access C1 C2 Method call Method cannot depend on F1 F2 itself, as in recursive calls 6
- 7. Dependency Finder No Dependency on Self Does not add information P Compile time Class is unit of compilation C Runtime F Class is unit of loading Maintenance Already editing class or feature 7
- 8. Dependency Finder Explicit Dependencies Source code P1 P2 static final constants C1 C2 Needed for compilation Compiled code F1 F2 Fully qualified names No 3rd party JARs Needed for runtime 8
- 9. Dependency Finder Implicit Dependencies Derived from explicit P1 P2 Minimize C1 C2 Reduce space Augment time F1 F2 Maximize Augment space Reduce time 9
- 10. Dependency Finder Implicit Dependencies classes of features of self a package a class P P P C1 C2 C C F1 F2 F1 F2 F 10
- 11. Dependency Finder Package Instability (from Robert C. Martin) Number of classes outside the package that Ca depend upon classes inside the package. Number of classes outside the package that Ce classes inside the package depend upon. Ce I = Ca + C e High Ce or low Ca means hard to change If Ca and Ce are 0, then I = 0 Depend on packages with lower I than you 11
- 12. Dependency Finder A vs I Graph (from Robert C. Martin) 1 uselessness Depend on abstract packages A + A Concrete packages I 1 = should have no 0 pain dependents 0 I 1 12
- 13. Dependency Finder Are Dependencies Transitive? A B C ? ? ? It depends! Case-by-case, not automatic Is part of B that A depends on impacted by changes in C? 13
- 14. Dependency Finder Transitive Closure callers dependencies dependents 14
- 15. Dependency Finder Transitive Closure + 2 1 0 0 1 2 + 15
- 16. Dependency Finder Package-to-Package Example Default configuration Complete package-level graph 16
- 17. Dependency Finder Package-to-Package Example Excluding /java/ Dont list dependencies on anything with java 17
- 18. Dependency Finder Why Do I See java <-- jeantessier? Scope P1 P2 Factory Filter C1 C2 P1 P2 Factory F1 F2 C1 C2 P1 P2 F1 F2 C1 C2 original copy F1 F2 18
- 19. Dependency Finder Package-to-Package Example Excluding /^java/ Dont list dependencies on java.* 19
- 20. Dependency Finder Package-to-Package Example Including /^com.jean/ Only list dependencies with com.jean* 20
- 21. Dependency Finder Package-to-Package Example Including /^com.jean/, /^test/ Only list with com.jean* and test.* 21
- 22. Dependency Finder Package-to-Package Example Excluding /^java/ Dont list packages in java.* 22
- 23. Dependency Finder Package-to-Package Example Including /com.jean/, /^test/ Only list test.* and com.jean* 23
- 24. Dependency Finder Feature-to-Feature Example Including /Node.Accept/ Calls to *Node.Accept() methods 24
- 25. Dependency Finder Feature-to-Feature Example Including /Node.Accept(/ Calls to *Node.Accept() methods, less output 25
- 26. Dependency Finder Feature-to-Feature Example Including /(Node).1(/ Calls to constructors of Node 26
- 27. Dependency Finder Feature-to-Feature Example Including /(w*Node).1(/ Calls to constructors of classes ending in Node 27
- 28. Dependency Finder Feature-to-Feature Example Including /NodeFactory/ Calls to methods of NodeFactory 28
- 29. Dependency Finder Transitive Closure Example Shows Accept*() methods 29
- 30. Dependency Finder Transitive Closure Example Direct callers of Accept*() 30
- 31. Dependency Finder Transitive Closure Example Second degree callers of Accept*() 31
- 32. Dependency Finder Transitive Closure Example Everything reachable from Accept*() 32
- 33. Dependency Finder Perl Regular Expressions [A-Z] Capitals w Alphanumeric [A-Za-z0-9_] W Non-alpha [^A-Za-z0-9_] w+ At least one alphanumeric s Space, including tab and eol s* Zero or more white space . . as opposed to any character 33