Automated Refactoring
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The document discusses code smells, refactoring, and automated refactoring. It defines code refactoring as making small changes to improve code structure and readability without changing external behavior. Common code smells include duplicated code, long methods, large classes, switch statements, magic numbers, and poor naming. Automated tools can help identify code smells and suggest refactoring solutions. The session covers code smells, demonstrates refactoring techniques, and includes a refactoring quiz.
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Automated Refactoring
- 1. Code Smells And Automated Refactoring Janeve George [email_address] Amit Goyal [email_address] Presented By:
- 2. Few Instructions It's not a presentation !!!
- 3. Parking lot
- 5. Flow Of The Session The Problem
- 8. Code Smells
- 9. Quiz
- 11. Flow Of The Session The Problem Code Refactoring
- 13. Code Smells
- 14. Quiz
- 16. The Problem
- 17. Flow Of The Session The Problem
- 18. Code Refactoring Automated Refactoring
- 19. Code Smells
- 20. Quiz
- 22. Code Refactoring Series of small steps
- 23. Change in the internal structure
- 24. No change in the external behavior
- 25. java.util.Calendar c = java.util.Calendar.getInstance(); c.set(2010, java.util.Calendar.APRIL, 25); Date today = c.getTime();
- 26. Date today = april(25, 2010);
- 27. double getPayAmount() { double result; if (_isDead) { // Get the dead amount result = getAmount1(); } else { if (_isSeparated)) { // Get the separated amount result = getAmount2(); } else { if (_isRetired) { // Get the retired amount result = getAmount3(); } else { // Get the normal amount result = getAmount4(); } } } return result; }
- 28. double getPayAmount() { if (_isDead) return deadAmount(); if (_isSeparated) return separatedAmount(); if (_isRetired) return retiredAmount(); return normalPayment(); }
- 29. Flow Of The Session The Problem
- 30. Code Refactoring
- 31. Automated Refactoring Code Smells
- 32. Quiz
- 35. Flow Of The Session The Problem
- 36. Code Refactoring
- 38. Code Smells Quiz
- 40. Code Smells Duplicated Code
- 41. Long Method
- 42. Large Class
- 44. Feature Envy
- 45. Magic Number
- 46. Comments
- 47. Improper Name
- 48. & Many More....
- 49. Duplicate Code
- 50. Long Method
- 51. Large Class
- 53. Feature Envy
- 54. Magic Numbers
- 55. Comments
- 56. Improper Naming
- 57. Flow Of The Session The Problem
- 58. Code Refactoring
- 60. Code Smells
- 63. if( isSpecialDeal() ) { total = price * 0.95; send(); } else { total = price * 0.98; send(); } Identify code smells in the following code snippet and suggest remedies:
- 64. Refactor the following code: int d; // elapsed time in days
- 65. What are the remedies to deal with a large class?
- 66. Refactoring helps in __________, ___________, __________.
- 67. double potentialEnergy(double mass, double height) { return mass * 9.81 * height; } Identify code smells in the following code snippet:
- 68. Large class violates _____________ principle.
- 69. What are the techniques/remedies to deal with a long method?
- 70. make it loosely coupled
- 72. make it simple Renaming a method helps to (choose any one option):
- 73. Duplicate code violates ___________ principle.
- 74. void printOwning(double amount) { printBanner(); //Print details System.out.println("name"+ _name); System.out.println("amount" + amount); } Identify code smells in the following code snippet and suggest remedies:
- 75. //Calculate perimeter double temp = 2 * (_height + _width); Refactor the following code:
- 76. double disabilityAmount() { if( _seniority < 2 ) return 0; if( _monthsDisabled > 12 ) return 0; if( _isPartTime) return 0; ..... ..... } Refactor the following code:
- 77. Flow Of The Session The Problem
- 78. Code Refactoring
- 80. Code Smells
- 81. Quiz
- 85. References