OOP, Double Dispatch and Visitor Pattern

OOPのエッセンスとビジターパターンを使ったディスパッチのデザインパターン。弁護士ドットコム社で紹介。

Transcript

1. 001
   %PVCMF
   %JTQBUDI
   BOE
   7JTJUPS
   1BUUFSO "LJIJUP
   ,PSJZBNB
   
   
2. 1BSU
   
   001ͱखଓܕ 001
   BOE
   QSPDFEVSBM
   UZQFT
3. -PHJD %BUB
4. ࢛֯ܗͷ໘ੵΛٻΊΔ 'JOEJOH
   UIF
   BSFB
   PG
   B
   RVBESBOHMF
5. -PHJD %BUB <
   > B
   Y
   C
6. -PHJD͸%BUBΛ஌Δඞཁ͕͋Δ -PHJD
   OFFET
   UP
   LOPX
   %BUB
7. "SFB %BUB B
   Y
   C QVCMJD
   B QVCMJD
   C
8. ΧϓηϧԽͰ͖ͯͳ͍ /PU
   FODBQTVMBUFE
9. -PHJD %BUB B
   Y
   C HFU" 
   JOU HFU# 
   JOU
10. ΧϓηϧԽͰ͖ͯͳ͍  /PU
    FODBQTVMBUFE
11. w 8IZ
    HFUUFS
    BOE
    TFUUFS
    NFUIPET
    BSF
    FWJM
    
    w (FUUFS4FUUFS͸ѱͩɻҎ্ɻ
    
12. ΦϒδΣΫτࢦ޲ PCKFDUPSJFOUFE
13. 4IBQF <
    > B
    Y
    C
14. 4IBQF <
    > B
    Y
    C BSFB 
    JOU
15. खଓ͖ܕ QSPDFEVSBM
    UZQF
16. $MJFOU %BUB B
    Y
    C B C
17. 5FMM
18. 4IBQF <
    > B
    Y
    C BSFB 
    JOU
19. "TL
20. $MJFOU %BUB B
    Y
    C B C
21. 5FMM
    %POU
    BTL
22. 5FMM͸ࣗݾن཯త 5FMM
    JT
    TFMGEJTDJQMJOFE
23. ΧϓηϧԽ FODBQTVMBUJPO
24. ΦϒδΣΫτࢦ޲ PCKFDUPSJFOUFE
25. "TL͸
    ϩδοΫ͕σʔλͷ֎ʹ͋Δ *O
    "TL
    UIF
    MPHJD
    JT
    PVUTJEF
    UIF
    EBUB
26. -PHJD %BUB B
    Y
    C B C
27. σʔλߏ଄͕࿐ग़ %BUB
    TUSVDUVSFT
    FYQPTFE
28. ϧʔϧ͕ͳ͍ /P
    SVMFT
29. υϝΠϯ஌͕ࣝͳ͍ -BDL
    PG
    EPNBJO
    LOPXMFEHF
30. υϝΠϯශ݂঱
    %%% %PNBJO
    BOBFNJB
    %%%
31. 1BSU
    
    μϒϧσΟεύον %PVCMF
    EJTQBUDI
32. 001Ͱ-PHJDͱ%BUBΛ෼཭
33. యܕత001Ͱ͸ΦϒδΣΫτ͕
    -PHJDΛϓϩύςΟʹอ࣋ *O
    UZQJDBM
    001
    PCKFDUT
    IPME
    -PHJD
    BT
    B
    QSPQFSUZ
34. %BUB -PHJD
    B
    Y
    C
35. 7JTJUPSύλʔϯͰ͸
    -PHJD͕σʔλΛ๚໰ -PHJD
    WJTJUT
    EBUB
    PCKFDU
    JO
    UIF
    7JTJUPS
    QBUUFSO
36. 7JTJUPS %BUB GVODUJPO
    BDDFQU 7JTJUPS
    W
    
37. σʔλ͸๚໰ऀΛར༻ %BUB
    VTFT
    WJTJUPST
38. 7JTJUPS %BUB WWJTJU B
    C
39. ๚໰ऀʹϩδοΫ͕͋Δ 7JTJUPST
    IBWF
    MPHJD
40. 7JTJUPS %BUB GVODUJPO
    WJTJU B
    C
    SFUVSO
    B
    
    C
41. 7JTJUPSͰ͸
    -PHJD͕ϝιουͰ౉͞ΕΔ *O
    UIF
    7JTJUPS
    QBUUFSO
    -PHJD
    JT
    QBTTFE
    CZ
    NFUIPE
42. σʔλίϨΫλʔ
    ਤܗͷࢹ֮Խ
    όϦσʔγϣϯ %BUB
    DPMMFDUPST
    TIBQF
    WJTVBMJTBUJPO
    7BMJEBUJPO
43. ଟ༷ͳ-PHJDͷҰ࣌తͳ๚໰ %JWFSTF
    -PHJD
    UFNQPSBSZ
    WJTJUT
44. " %BUB #
45. γϯάϧσΟεύον
    ࣮ߦͷܾఆ͕୯Ұ 4JOHMF
    EJTQBUDI
    TJOHMF
    EFDJTJPO
    UP
    FYFDVUF
46. " %BUB # BDDFQU WJTJU
47. μϒϧσΟεύον
    ࣮ߦͷܾఆ͕̎ճ %PVCMF
    EJTQBUDI
    5XP
    FYFDVUJPO
    EFDJTJPOT
48. ଟॏσΟεύον
    ࣮ߦͷܾఆ͕ෳ਺ճ .VMUJQMF
    EJTQBUDI
    .VMUJQMF
    FYFDVUJPO
    EFDJTJPOT
49. QBSU
    %*ίϯύΠϥͷઃܭ %*
    DPNQJMFS
    EFTJHO
50. Πϯελϯεੜ੒ JOTUBODF
    DSFBUJPO
51. %BUB
    
    wOFX*OTUBODF
    wDMBTT/BNF
    wBSHVNFOUT
    wBSHVNFOU
    wTFUUFS.FUIPET
    wTFUUFS.FUIPE
    wNFUIPE/BNF
    wBSHVNFOUT
    wBSHVNFOU Dependency
52. ґଘʹ͸ґଘ͕͋Δ %FQFOEFODF
    VQPO
    EFQFOEFODF
53. %BUB
    
    wOFX*OTUBODF
    wDMBTT/BNF
    wBSHVNFOUT
    wBSHVNFOU
    wTFUUFS.FUIPET
    wTFUUFS.FUIPE
    wNFUIPE/BNF
    wBSHVNFOUT
    wBSHVNFOU Dependency
54. 7JTJUPSίϯύΠϥͷઃܭ 7JTJUPS
    DPNQJMFS
    EFTJHO
55. ड͚औͬͨΦϒδΣΫτར༻Λ܁Γฦ͢ 3FQFBU
    SFDFJWFE
    PCKFDU
    VTF
56. 
    
    w WJTJU%FQFEFODZ
    w WJTJU/FX*OTOUBDF
    w WJTJU"SHVNFOUT
    w WJTJU"SHVNFOU
    w WJTJU4FUUFS.FUIPET
    w WJTJU4FUUFS.FUIPE
    %BUB
    
    w OFX*OTUBODF
    wDMBTT/BNF
    wBSHVNFOUT
    wBSHVNFOU
    wTFUUFS.FUIPET
    wTFUUFS.FUIPE
    wNFUIPE/BNF
    w
    BSHVNFOUT
    wBSHVNFOU Visitor Dependency
57. 4FUUFS.FUIPETͷ৔߹ 'PS
    4FUUFS.FUIPET
58. %BUB SetterMethods public function accept(VisitorInterface $visitor) { $visitor->visitSetterMethods($this->setterMethods); }
59. w Visitor public function visitSetterMethods( array $setterMethods ) { foreach ($setterMethods as $setterMethod) { $setterMethod->accept($this); } }
60. 7JTJUPS͸ड͚औͬͨΦϒδΣΫτΛ
    ໧ʑͱεΫϦϓτʹ 5IF
    7JTJUPS
    TFOET
    UIF
    SFDFJWFE
    PCKFDU
    UP
    UIF
    TDSJQU
    DPEF
61. ෳࡶͳߏ଄ͷBDDFQUͱWJTJUΛ܁Γฦ͠
    ݁ہ࠷ॳͷίʔϧ͕࠷ऴ݁ՌΛड͚औΔ 3FQFBUFE
    BDDFQU
    BOE
    WJTJU
    PG
    DPNQMFY
    TUSVDUVSFT
    
    &WFOUVBMMZ
    UIF
    fi STU
    DBMM
    SFDFJWFT
    UIF
    fi OBM
    SFTVMU
62. 
    
    w WJTJU%FQFEFODZ
    w %BUB
    
    w Visitor Dependency
63. ͦΕͧΕͷϝιου͸
    ہॴతͳ஌ࣝͱλεΫ͔͠ཁٻ͞Εͳ͍ 0OMZ
    MPDBM
    LOPXMFEHF
    BOE
    UBTLT
    BSF
    SFRVJSFE
64. ෳࡶͳґଘߏ଄ΛίϯύΠϥ͸஌Βͳ͍ $PNQJMFST
    BSF
    VOBXBSF
    PG
    DPNQMFY
    EFQFOEFODZ
    TUSVDUVSFT
65. ࠓԿΛ͢Δ͔ͱɺ࣍ʹԿΛݺͿ͔
    ଞʹ͸ؔ৺͕ͳ͍ 8IBU
    UP
    EP
    OPX
    BOE
    XIBU
    UP
    DBMM
    OFYU
    /PU
    JOUFSFTUFE
    JO
    BOZUIJOH
    FMTF
66. શମΛ஌ΔίϯμΫλʔ͸͍ͳ͍ /P
    DPOEVDUPS
    LOPXT
    UIF
    XIPMF
    TUSVDUVSF
67. ΦʔέετϨʔγϣϯͰ͸ͳ͘ɺίϨΦάϥϑΟʔ $IPSFPHSBQIZ
    OPU
    PSDIFTUSBUJPO
68. σʔλͱϩδοΫΛ෼཭͠ɺΦϒδΣΫ τߏ଄ͷৄࡉΛ஌Βͣʹ৽͍͠ϩδοΫ Λద༻Ͱ͖ΔσβΠϯύλʔϯ %FTJHO
    QBUUFSOT
    UIBU
    TFQBSBUF
    EBUB
    GSPN
    MPHJD
    BOE
    BMMPX
    OFX
    MPHJD
    UP
    CF
    BQQMJFE
    XJUIPVU
    LOPXJOH
    UIF
    EFUBJMT
    PG
    UIF
    PCKFDU
    TUSVDUVSF