SOLID原則について / about the SOLID principles

社内勉強会でSOLID原則、SRP・OCPについて発表しました。

Transcript

1. SOLIDݪଇʹ͍ͭͯ @jageishi
2. ѱ͍ઃܭͬͯʁ
3. • มߋ͠ʹ͍͘ • ෆඞཁʹෳࡶ • ෆඞཁͳ܁Γฦ͠ • ෆಁ໌ • Ҡ২ੑ͕ͳ͍
4. ةͳ͍ɺɺ
5. • मਖ਼ʹ͕͔͔࣌ؒΔ • Өڹൣғ͕Θ͔Βͳ͍ • मਖ਼͢Δͷ͕ා͍ • ࢒ۀ͕૿͑Δ etc..
6. SOLIDݪଇʹ ൓͍ͯ͠Δ͜ͱ͕ଟ͍
7. SOLIDݪଇ • ΦϒδΣΫτࢦ޲ݴޠʹ͓͍ͯɺ࠷ྑͷઃܭΛ͢Δॿ͚ͱ ͳΔݪଇ
8. 1.୯Ұ੹೚ͷݪଇ (SRP : Single Responsibility Principle) 2.ΦʔϓϯɾΫϩʔζυͷݪଇ (OCP : Open-Closed Principle) 3.Ϧείϑͷஔ׵ݪଇ (LSP : Liskov Substitution Principle) 4.ΠϯλϑΣʔε෼཭ͷݪଇ (ISP : Interface Segregation Principle) 5.ґଘؔ܎ٯసͷݪଇ (DIP : Dependency Inversion Principle)
9. 1.୯Ұ੹೚ͷݪଇ (SRP : Single Responsibility Principle) 2.ΦʔϓϯɾΫϩʔζυͷݪଇ (OCP : Open-Closed Principle) ࠓ೔͸͜ͷ2ͭʹ͍ͭͯઆ໌͠·͢ɻ
10. ਤܗඳըΞϓϦέʔγϣϯ Λྫʹߟ͑ͯΈΔ
11. ཁ݅ • ௕ํܗͱԁΛը໘ʹඳը͍ͨ͠
13. DrawingTool͸Rectangleͱ CircleΛ࢖͏
16. SOLIDݪଇΛ ౰ͯ͸ΊͯΈΔ
17. 1.୯Ұ੹೚ͷݪଇ (SRP : Single Responsibility Principle) 2.ΦʔϓϯɾΫϩʔζυͷݪଇ (OCP : Open-Closed Principle)
18. ୯Ұ੹೚ͷݪଇ (SRP : Single Responsibility Principle) • Ϋϥεͷ੹຿͸2ͭҎ্ଘࡏͯ͠͸ͳΒͳ͍
19. ௕ํܗΛඳը͢Δ ໾ׂ ԁΛඳը͢Δ ໾ׂ
20. ͜ͷΫϥεΛมߋ͢Δέʔε • ௕ํܗΛඳը͢ΔॲཧΛमਖ਼͢Δ৔߹ • ԁΛඳը͢ΔॲཧΛमਖ਼͢Δ৔߹ • ଞͷਤܗʹ΋ରԠ͢Δ৔߹ etc..
21. มߋཧ༝͕ෳ਺͋Δ = ੹຿͕ෳ਺͋Δ
22. ୯Ұ੹೚ͷݪଇΛ ຬ͍ͨͯ͠ͳ͍
23. 1.୯Ұ੹೚ͷݪଇ (SRP : Single Responsibility Principle) 2.ΦʔϓϯɾΫϩʔζυͷݪଇ (OCP : Open-Closed Principle)
24. • मਖ਼͢Δͨͼʹϝιου͕ෳࡶʹͳΔ • ίϯϑϦΫτ͢ΔՄೳੑ͕ߴ͘ͳΔ • ௕ํܗ༻ͷඳըॲཧΛमਖ਼ͨͭ͠΋Γ͕ԁͷඳըॲཧʹ ΋Өڹ͕ग़ͯ͠·͏͔΋ etc..
25. 1.୯Ұ੹೚ͷݪଇ (SRP : Single Responsibility Principle) 2.ΦʔϓϯɾΫϩʔζυͷݪଇ (OCP : Open-Closed Principle)
26. ΦʔϓϯɾΫϩʔζυͷݪଇ (OCP : Open-Closed Principle) • ֦ுʹରͯ͠։͍͍ͯͯɺमਖ਼ʹରͯ͠ด͍ͯ͡ͳ͚Ε͹ ͳΒͳ͍
28. ཁ໿͢Δͱɺɺɺ • ֦ுͰ͖ͯमਖ਼΋؆୯
29. ͜͜Ͱ
30. ௥Ճཁ݅ • ࡾ֯ܗΛѻ͑ΔΑ͏ʹ͍ͨ͠
31. ͲͷΑ͏ʹमਖ਼͢Δʁ
32. • TriangleΫϥεΛ௥Ճ͢Δ • DrawingToolΫϥεͷdrawAllShapes()Λमਖ਼͢Δ
33. ࡾ֯ܗΫϥεΛ௥Ճ
34. ࡾ֯ܗΛඳը͢Δ ॲཧΛ௥Ճ
35. ؆୯ʂ
36. Ͱ΋ɺɺɺ • ӨڹՕॴ͸͚ͩ͜͜ʁ • ଞͷਤܗΛ௥Ճͨ͠ΒͲΜͲΜෳࡶʹͳΔ͚Ͳେৎ෉ʁ • मਖ਼͸ଞͷॲཧʹӨڹ͍ͯ͠ͳ͍͜ͱΛอূͰ͖Δʁ
37. େมɺɺɺ
38. • ࡾ֯ܗΛ௥Ճ͢Δͷ͸Մೳ (TriangleΫϥεͷ௥Ճ) = ֦ுʹରͯ͠։͍͍ͯΔʢ͍͓ͪ͏ʣ • ͔͠͠ɺमਖ਼ՕॴʢӨڹՕॴʣ͸ଟ͍͠ɺௐࠪ΋ඞཁ = मਖ਼ʹରͯ͠ด͍ͯ͡ͳ͍ʂ
39. ΦʔϓϯɾΫϩʔζυͷݪଇΛ ຬ͍ͨͯ͠ͳ͍
40. 1.୯Ұ੹೚ͷݪଇ (SRP : Single Responsibility Principle) 2.ΦʔϓϯɾΫϩʔζυͷݪଇ (OCP : Open-Closed Principle)
41. • ػೳ֦ுΛߦ͏ࡍͷӨڹൣғ͕ଌΕͳ͍ • मਖ਼͢ΔͨͼʹӨڹՕॴΛௐࠪ͢Δͷ͸ർΕΔ • ରԠ͕࿙ΕΔՄೳੑ্͕͕Δ • ճؼςετ͕΍͹͍
42. ݪଇΛຬͨ͢Α͏ʹ मਖ਼͠Α͏ʂ
43. 伴͸ʮந৅ʯ
44. • એݴ͕ݻఆ͞Ε͍ͯͯɺಛఆͷ࣮૷ʹ݁߹͍ͯ͠ͳ͍ϝιο υΛʮந৅ʯͰදݱͰ͖Δɻ ͭ·Γɺϝιουݺͼग़͠ํ๏͸ಉ͚ͩ͡Ͳɺ࣮ࡍͷॲ ཧ͸Πϯελϯεʢ೿ੜΫϥεʣʹ೚ͤΔ͜ͱ͕ग़དྷΔɻ
45. मਖ਼ͯ͠ΈΔ
47. (ந৅)ਤܗΫϥεΛ࡞੒ ௕ํܗ΍ԁ͸ ਤܗΫϥεΛ࣮૷ drawAllShapes()Ͱ͸ ௕ํܗ΍ԁΛʮਤܗʯ ͱͯ͠ѻ͏͜ͱ͕ग़དྷΔ
49. ֤ਤܗઐ༻ͷdraw()Λ࣮૷
51. ந৅ਤܗΫϥεͷdraw()Λݺͼग़͚ͩ͢
52. ྑͦ͞͏
53. ݪଇΛ౰ͯ͸ΊͯΈΔ
54. 1.୯Ұ੹೚ͷݪଇ (SRP : Single Responsibility Principle) 2.ΦʔϓϯɾΫϩʔζυͷݪଇ (OCP : Open-Closed Principle)
55. ୯Ұ੹೚ͷݪଇ (SRP : Single Responsibility Principle) • Ϋϥεͷ੹຿͸2ͭҎ্ଘࡏͯ͠͸ͳΒͳ͍
57. ͋͘·ͰʮਤܗʯΛඳը͢Δ͚ͩ
58. • ਤܗͷඳըॲཧΛमਖ਼͢Δͱͯ͠΋ɺShapeΫϥεΛ࣮૷ ͨ͠೿ੜΫϥεͷdraw()Λमਖ਼͢Δ͚ͩ
59. 1.୯Ұ੹೚ͷݪଇ (SRP : Single Responsibility Principle) 2.ΦʔϓϯɾΫϩʔζυͷݪଇ (OCP : Open-Closed Principle)
60. 1.୯Ұ੹೚ͷݪଇ (SRP : Single Responsibility Principle) 2.ΦʔϓϯɾΫϩʔζυͷݪଇ (OCP : Open-Closed Principle)
61. ΦʔϓϯɾΫϩʔζυͷݪଇ (OCP : Open-Closed Principle) • ֦ுʹରͯ͠։͍͍ͯͯɺमਖ਼ʹରͯ͠ด͍ͯ͡ͳ͚Ε͹ ͳΒͳ͍
62. ௥Ճཁ݅ • ࡾ֯ܗΛѻ͑ΔΑ͏ʹ͍ͨ͠
63. ʮਤܗʯΫϥεΛ࣮૷ͨ͠ ࡾ֯ܗΫϥεΛ௥Ճ
65. ࡾ֯ܗ༻ͷdraw()Λ࣮૷
67. drawAllShapes()͸ʮਤܗʯ͕ ࣮ࡍʹͲͷΑ͏ͳܗͷਤܗͳͷ ͔͸஌Βͳͯ͘ྑ͍ मਖ਼͢Δඞཁ͸ͳ͍ʂ
68. • ਤܗΫϥεΛ࣮૷ͨ͠ࡾ֯ܗΫϥεΛ௥Ճ͠ɺdraw()Λ࣮ ૷͢Δ • طଘॲཧͷमਖ਼͸ෆཁ
69. • ਤܗΫϥεΛ࣮૷ͨ͠ࡾ֯ܗΫϥεΛ௥Ճ͠ɺdraw()Λ࣮ ૷͢Δ = ֦ுʹରͯ͠։͍͍ͯΔ • طଘॲཧͷमਖ਼͸ෆཁ = मਖ਼ʹରͯ͠ด͍ͯ͡Δ
70. 1.୯Ұ੹೚ͷݪଇ (SRP : Single Responsibility Principle) 2.ΦʔϓϯɾΫϩʔζυͷݪଇ (OCP : Open-Closed Principle)
71. ·ͱΊ • SOLIDݪଇ͸ڧݻͰॊೈͳઃܭΛߦ͏ͨΊͷ5ͭͷݪଇ • ઃܭͨ͠ΒSOLIDઃܭݪଇΛ౰ͯ͸ΊͯΈΑ͏ • मਖ਼͢ΔࡍʹσβΠϯύλʔϯΛ஌͍ͬͯΕ͹બ୒ࢶ͕૿͑ΔΑ • ॊೈʹରԠ͢Δ͜ͱ͕େࣄ • ϖΞϓϩͱ͔ྑ͍Έ͍ͨͰ͢Α • ଞʹ΋ݴ͍͍ͨ͜ͱ͸͋Δ͚ͲແཧͰͨ͠ɺɺɺ