RxSwiftに対応したバリデーションをGenericなProtocolで実装してみた / Generic Validation Protocol with RxSwift

by Yuto Yazaki

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3Y4XJGUʹରԠͨ͠όϦσʔγϣϯΛ (FOFSJDͳ1SPUPDPMͰ࣮૷ͯ͠Έͨ QPUBUPUJQT  ໼㟒༤ਓ:B[BLJ:VUP

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ࣗݾ঺հ w ͓͍͍͠ʂΛ࡞ΔϨγϐಈըϝσΟΞʮNPHVOBʯͷJ04ΤϯδχΞ w ৽ଔ೥໨✨ w ֶੜ࣌୅ʹษڧձӡӦͯ͠·ͨ͠ʢࣾձਓʹͳͬͯൃද͸ॳΊͯʣ άϦʔגࣜձࣾ ޿ࠂɾϝσΟΞࣄۀຊ෦ϥΠϑελΠϧࣄۀ෦ ϝσΟΞάϧʔϓ։ൃνʔϜ ໼㟒༤ਓ:B[BLJ:VUP

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3Y4XJGUʹରԠͨ͠όϦσʔγϣϯΛ (FOFSJDͳ1SPUPDPMͰ࣮૷ͯ͠Έͨ

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3Y4XJGUʹରԠͨ͠όϦσʔγϣϯΛ࡞Γ͍ͨ w Ϣʔβͷೖྗ಺༰ΛόϦσʔγϣϯ͍ͨ͠ w ྫOจࣈҎ಺ ෆਖ਼ͳॻࣜͷνΣοΫ FUD w Τϥʔͷཧ༝Λఏࣔͯ͠Ϣʔβʹमਖ਼ͯ͠΋Β͏ w 3Y4XJGUͰόΠϯυ͍ͤͨ͞ w δΣωϦΫεͰ͍͍ײ͡ʹ w όϦσʔγϣϯ͢Δ044ϥΠϒϥϦ͸͋Δ͕ w ϥΠϒϥϦಋೖ͢Δ΄ͲͰ΋ͳ͍͠ w 3Y4XJGUʹରԠͯ͠ͳ͍͠ (FOFSJDͳ1SPUPDPMͰ 3Y4XJGUʹରԠͨ͠7BMJEBUPSΛ࣮૷͠Α͏

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׬੒Πϝʔδ Ϣʔβͷೖྗͨ͠จࣈྻ͕ ༗ޮͳ஋Ͱ͋Ε͹ ૹ৴ϘλϯΛԡͤΔΑ͏ʹ͢Δ

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7BMJEBUPSϓϩτίϧ ValueTypeɿόϦσʔγϣϯ͢Δ஋ͷܕ ErrorType ɿෆਖ਼ͳ஋ͷ৔߹ͷΤϥʔ validate() ɿόϦσʔγϣϯ݁ՌΛฦ͢

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7BMJEBUJPO3FTVMU όϦσʔγϣϯͷਖ਼ޡΛද͢FOVN

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7BMJEBUPSͷ࣮૷ྫ Ϣʔβ໊ͷೖྗཝΛ૝ఆͯ͠ ΤϥʔΛఆٛ͢Δ όϦσʔγϣϯͷϩδοΫΛॻ͘ 4USJOH Λೖྗ஋ʹ͢Δ

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7BMJEBUPSͷ࢖༻ྫ ୯ମͰ͸ಈ͘Α͏ʹͳͬͨ ͜ΕΛ3Y4XJGUʹରԠͤ͞Δ

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3Y4XJGUͷ0CTFSWBCMF5ZQFʹ WBMJEBUFΦϖϨʔλΛੜ΍͢ Ҿ਺ʹ7BMJEBUPSΛ౉ͯ͠ɺ ετϦʔϜʹྲྀΕ͖ͯͨ஋ΛόϦσʔγϣϯ͠ɺ ݁ՌΛ7BMJEBUJPO3FTVMUܕͰฦ͢ɻ

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׬੒

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࢖ͬͯΈΔ όϦσʔγϣϯʹҾ͔͔ͬͬͨΒˠΤϥʔ಺༰Λදࣔ ༗ޮͳ஋Ͱ͋Ε͹ˠ4VCNJUϘλϯ͕ԡͤΔΑ͏ʹͳΔ

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·ͱΊ w όϦσʔγϣϯ͢ΔϓϩτίϧΛఆٛ w Ϣχοτςετ͕ॻ͖΍͍͢ w 3Y4XJGUʹόϦσʔγϣϯͷΦϖϨʔλΛੜ΍͢ w γϯϓϧͳهड़Ͱݟ௨͠ͷΑ͍ίʔυʹͳΔ w δΣωϦΫεͷษڧʹͳͬͨ w αϯϓϧίʔυ w IUUQTHJUIVCDPNZVUPZB[BLJ3Y7BMJEBUJPO4BNQMF

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