Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
OOP, Double Dispatch and Visitor Pattern
Search
Akihito Koriyama
May 24, 2024
Technology
2
140
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。
Akihito Koriyama
May 24, 2024
Tweet
Share
More Decks by Akihito Koriyama
See All by Akihito Koriyama
AI Centric
koriym
0
310
app-state-diagram
koriym
0
73
BEAR.Sunday 2014-2024
koriym
0
66
イベント駆動コンテンツ (a.k.a Webアプリケーションの効率を再定義するBEAR.Sundayの分散キャッシングフレームワーク)
koriym
4
7.9k
Unconf: RWA読書会
koriym
0
590
REST 6+4の制約
koriym
2
2.8k
RESTful Web API 読書会 #1
koriym
3
290
RESTの力 / The Power of REST
koriym
10
8k
全てを結ぶ力 (2019)
koriym
3
1k
Other Decks in Technology
See All in Technology
AWS CDK 実践的アプローチ N選 / aws-cdk-practical-approaches
gotok365
4
520
Windows 11 で AWS Documentation MCP Server 接続実践/practical-aws-documentation-mcp-server-connection-on-windows-11
emiki
0
720
AIエージェントの継続的改善のためオブザーバビリティ
pharma_x_tech
6
1.4k
Wasm元年
askua
0
100
BigQuery Remote FunctionでLooker Studioをインタラクティブ化
cuebic9bic
2
230
IAMのマニアックな話 2025を執筆して、 見えてきたAWSアカウント管理の現在
nrinetcom
PRO
4
660
Create a Rails8 responsive app with Gemini and RubyLLM
palladius
0
140
Navigation3でViewModelにデータを渡す方法
mikanichinose
0
210
変化する開発、進化する体系時代に適応するソフトウェアエンジニアの知識と考え方(JaSST'25 Kansai)
mizunori
0
140
LinkX_GitHubを基点にした_AI時代のプロジェクトマネジメント.pdf
iotcomjpadmin
0
160
生成AIでwebアプリケーションを作ってみた
tajimon
2
130
Definition of Done
kawaguti
PRO
6
460
Featured
See All Featured
Done Done
chrislema
184
16k
No one is an island. Learnings from fostering a developers community.
thoeni
21
3.3k
KATA
mclloyd
29
14k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
PRO
181
53k
Why Our Code Smells
bkeepers
PRO
337
57k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
161
15k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
15
1.5k
Why You Should Never Use an ORM
jnunemaker
PRO
56
9.4k
Product Roadmaps are Hard
iamctodd
PRO
53
11k
The Art of Programming - Codeland 2020
erikaheidi
54
13k
Visualizing Your Data: Incorporating Mongo into Loggly Infrastructure
mongodb
46
9.6k
Chrome DevTools: State of the Union 2024 - Debugging React & Beyond
addyosmani
7
700
Transcript
001 %PVCMF%JTQBUDIBOE 7JTJUPS1BUUFSO "LJIJUP,PSJZBNB
1BSU001ͱखଓܕ 001BOEQSPDFEVSBMUZQFT
-PHJD %BUB
࢛֯ܗͷ໘ੵΛٻΊΔ 'JOEJOHUIFBSFBPGBRVBESBOHMF
-PHJD %BUB < > BYC
-PHJD%BUBΛΔඞཁ͕͋Δ -PHJDOFFETUPLOPX%BUB
"SFB %BUB BYC QVCMJDB QVCMJDC
ΧϓηϧԽͰ͖ͯͳ͍ /PUFODBQTVMBUFE
-PHJD %BUB BYC HFU" JOU HFU# JOU
ΧϓηϧԽͰ͖ͯͳ͍ /PUFODBQTVMBUFE
w 8IZHFUUFSBOETFUUFSNFUIPETBSFFWJM w (FUUFS4FUUFSѱͩɻҎ্ɻ
ΦϒδΣΫτࢦ PCKFDUPSJFOUFE
4IBQF < > BYC
4IBQF < > BYC BSFB JOU
खଓ͖ܕ QSPDFEVSBMUZQF
$MJFOU %BUB BYC B C
5FMM
4IBQF < > BYC BSFB JOU
"TL
$MJFOU %BUB BYC B C
5FMM %POUBTL
5FMMࣗݾنత 5FMMJTTFMGEJTDJQMJOFE
ΧϓηϧԽ FODBQTVMBUJPO
ΦϒδΣΫτࢦ PCKFDUPSJFOUFE
"TL ϩδοΫ͕σʔλͷ֎ʹ͋Δ *O"TL UIFMPHJDJTPVUTJEFUIFEBUB
-PHJD %BUB BYC B C
σʔλߏ͕࿐ग़ %BUBTUSVDUVSFTFYQPTFE
ϧʔϧ͕ͳ͍ /PSVMFT
υϝΠϯ͕ࣝͳ͍ -BDLPGEPNBJOLOPXMFEHF
υϝΠϯශ݂ %%% %PNBJOBOBFNJB %%%
1BSUμϒϧσΟεύον %PVCMFEJTQBUDI
001Ͱ-PHJDͱ%BUBΛ
యܕత001ͰΦϒδΣΫτ͕ -PHJDΛϓϩύςΟʹอ࣋ *OUZQJDBM001 PCKFDUTIPME-PHJDBTBQSPQFSUZ
%BUB -PHJD BYC
7JTJUPSύλʔϯͰ -PHJD͕σʔλΛ๚ -PHJDWJTJUTEBUBPCKFDUJOUIF7JTJUPSQBUUFSO
7JTJUPS %BUB GVODUJPOBDDFQU 7JTJUPSW
σʔλ๚ऀΛར༻ %BUBVTFTWJTJUPST
7JTJUPS %BUB WWJTJU B C
๚ऀʹϩδοΫ͕͋Δ 7JTJUPSTIBWFMPHJD
7JTJUPS %BUB GVODUJPOWJTJU B C SFUVSOB C
7JTJUPSͰ -PHJD͕ϝιουͰ͞ΕΔ *OUIF7JTJUPSQBUUFSO -PHJDJTQBTTFECZNFUIPE
σʔλίϨΫλʔ ਤܗͷࢹ֮Խ όϦσʔγϣϯ %BUBDPMMFDUPST TIBQFWJTVBMJTBUJPO7BMJEBUJPO
ଟ༷ͳ-PHJDͷҰ࣌తͳ๚ %JWFSTF-PHJDUFNQPSBSZWJTJUT
" %BUB #
γϯάϧσΟεύον ࣮ߦͷܾఆ͕୯Ұ 4JOHMFEJTQBUDI TJOHMFEFDJTJPOUPFYFDVUF
" %BUB # BDDFQU WJTJU
μϒϧσΟεύον ࣮ߦͷܾఆ͕̎ճ %PVCMFEJTQBUDI 5XPFYFDVUJPOEFDJTJPOT
ଟॏσΟεύον ࣮ߦͷܾఆ͕ෳճ .VMUJQMFEJTQBUDI .VMUJQMFFYFDVUJPOEFDJTJPOT
QBSU%*ίϯύΠϥͷઃܭ %*DPNQJMFSEFTJHO
Πϯελϯεੜ JOTUBODFDSFBUJPO
%BUB wOFX*OTUBODF wDMBTT/BNF wBSHVNFOUT wBSHVNFOU wTFUUFS.FUIPET wTFUUFS.FUIPE wNFUIPE/BNF wBSHVNFOUT
wBSHVNFOU Dependency
ґଘʹґଘ͕͋Δ %FQFOEFODFVQPOEFQFOEFODF
%BUB wOFX*OTUBODF wDMBTT/BNF wBSHVNFOUT wBSHVNFOU wTFUUFS.FUIPET wTFUUFS.FUIPE wNFUIPE/BNF wBSHVNFOUT
wBSHVNFOU Dependency
7JTJUPSίϯύΠϥͷઃܭ 7JTJUPSDPNQJMFSEFTJHO
ड͚औͬͨΦϒδΣΫτར༻Λ܁Γฦ͢ 3FQFBUSFDFJWFEPCKFDUVTF
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 wBSHVNFOUT wBSHVNFOU Visitor Dependency
4FUUFS.FUIPETͷ߹ 'PS4FUUFS.FUIPET
%BUB SetterMethods public function accept(VisitorInterface $visitor) { $visitor->visitSetterMethods($this->setterMethods); }
w Visitor public function visitSetterMethods( array $setterMethods ) { foreach
($setterMethods as $setterMethod) { $setterMethod->accept($this); } }
7JTJUPSड͚औͬͨΦϒδΣΫτΛ ʑͱεΫϦϓτʹ 5IF7JTJUPSTFOETUIFSFDFJWFEPCKFDUUPUIFTDSJQUDPEF
ෳࡶͳߏͷBDDFQUͱWJTJUΛ܁Γฦ͠ ݁ہ࠷ॳͷίʔϧ͕࠷ऴ݁ՌΛड͚औΔ 3FQFBUFEBDDFQUBOEWJTJUPGDPNQMFYTUSVDUVSFT &WFOUVBMMZUIF fi STUDBMMSFDFJWFTUIF fi OBMSFTVMU
w WJTJU%FQFEFODZ w %BUB w Visitor Dependency
ͦΕͧΕͷϝιου ہॴతͳࣝͱλεΫ͔͠ཁٻ͞Εͳ͍ 0OMZMPDBMLOPXMFEHFBOEUBTLTBSFSFRVJSFE
ෳࡶͳґଘߏΛίϯύΠϥΒͳ͍ $PNQJMFSTBSFVOBXBSFPGDPNQMFYEFQFOEFODZTUSVDUVSFT
ࠓԿΛ͢Δ͔ͱɺ࣍ʹԿΛݺͿ͔ ଞʹؔ৺͕ͳ͍ 8IBUUPEPOPXBOEXIBUUPDBMMOFYU /PUJOUFSFTUFEJOBOZUIJOHFMTF
શମΛΔίϯμΫλʔ͍ͳ͍ /PDPOEVDUPSLOPXTUIFXIPMFTUSVDUVSF
ΦʔέετϨʔγϣϯͰͳ͘ɺίϨΦάϥϑΟʔ $IPSFPHSBQIZ OPUPSDIFTUSBUJPO
σʔλͱϩδοΫΛ͠ɺΦϒδΣΫ τߏͷৄࡉΛΒͣʹ৽͍͠ϩδοΫ Λద༻Ͱ͖ΔσβΠϯύλʔϯ %FTJHOQBUUFSOTUIBUTFQBSBUFEBUBGSPNMPHJDBOE BMMPXOFXMPHJDUPCFBQQMJFEXJUIPVULOPXJOHUIF EFUBJMTPGUIFPCKFDUTUSVDUVSF