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Repository pattern in Swift
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naoty
April 20, 2016
Technology
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Repository pattern in Swift
potatotips #28
naoty
April 20, 2016
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Transcript
/BPUP,BOFLP 3FQPTJUPSZ QBUUFSOJO4XJGU
None
ϦϙδτϦύλʔϯ w ϦϙδτϦͱɺσʔλͷऔಘɺอଘɺআͷͨΊ ͷΠϯλʔϑΣΠε w ϦϙδτϦΛͬͯσʔλʹΞΫηε͢Δɻ w ϝϞϦɺ3FBMNɺ"1*ͱ͍ͬͨόοΫΤϯυΛ Δඞཁ͕ͳ͘ͳΔɻ
ViewController RecipeRepository WebAPIRecipeRepository RealmRecipeRepository query model params JSON NSPredicate RealmObject
JO4XJGU protocol RecipeRepository { func find(id: UInt) -> Recipe? func
findAll(query: Query, sort: Sort) -> [Recipe] func save(recipes: [Recipe]) -> Recipe? func delete(recipes: [Recipe]) -> Recipe? }
JO4XJGU class MemoryRecipeRepository: RecipeRepository { let recipes = [ Recipe(id:
1, name: “…”), Recipe(id: 2, name: “…”), Recipe(id: 3, name: “…”), ] func find(id: UInt) -> Recipe? { recipes.filter { $0.id == id }.first } }
w σʔλͷΞΫηε͍͍ͩͨඇಉظ w ΫΤϦιʔτͲ͏ͬͯࢦఆ͢Δͷ͔ w 3FDJQF3FQPTJUPSZ $IFG3FQPTJUPSZ 6TFS3FQPTJUPSZʜͱࣅͨΑ͏ͳίʔυΛίϐϖ
͢Δ͜ͱʹͳΓͦ͏
ϦϙδτϦͰඇಉظॲཧΛ ͔͋ͭ͏
1SPNJTF protocol RecipeRepository { func find(id: UInt) -> Task<Void, Recipe,
ErrorType> func findAll(query: Query, sort: Sort) -> Task<Void, [Recipe], ErrorType> func save(recipes: [Recipe]) -> Task<Void, Recipe, ErrorType> func delete(recipes: [Recipe]) -> Task<Void, Recipe, ErrorType> }
ViewController RecipeRepository WebAPIRecipeRepository RealmRecipeRepository query model params JSON NSPredicate RealmObject
ViewController RecipeRepository WebAPIRecipeRepository RealmRecipeRepository Task<Void, Model, Error> params JSON NSPredicate
RealmObject query
൚༻తͳΫΤϦΛఆٛ͢Δ
OBPUZ"OZ2VFSZ let query = AnyQuery.Equal(key: “name”, value: “naoty”) query.predicate //=>
NSPredicate(format: "name == ‘naoty’") query.dictionary //=> ["name": “naoty”] let sort = AnySort.Ascending(key: “id”) sort.sortDescriptors //=> [NSSortDescriptor(key: "id", ascending: true)] sort.dictionary //=> ["sort": ["id"]]
OBPUZ"OZ2VFSZ protocol RecipeRepository { func find(id: UInt) -> Task<Void, Recipe,
ErrorType> func findAll(query: AnyQuery, sort: AnySort) -> Task<Void, [Recipe], ErrorType> func save(recipes: [Recipe]) -> Task<Void, Recipe, ErrorType> func delete(recipes: [Recipe]) -> Task<Void, Recipe, ErrorType> }
ViewController RecipeRepository WebAPIRecipeRepository RealmRecipeRepository Task<Void, Model, Error> params JSON NSPredicate
RealmObject query
ViewController RecipeRepository WebAPIRecipeRepository RealmRecipeRepository Task<Void, Model, Error> [String: AnyObject] JSON
NSPredicate RealmObject AnyQuery
൚༻తͳϦϙδτϦܕ Λఆٛ͢Δ
͜ΕͰ͖ͳ͍ protocol Repository { associatedtype Domain func find(id: Uint) ->
Task<Void, Domain, ErrorType> } let repository: Repository = MemoryRecipeRepository()
ܕফڈ struct AnyRepository<DomainType>: Repository { let _find: (id: UInt) ->
Task<Void, DomainType, ErrorType> init<T: Repository where T.Domain == DomainType>(_ repository: T) { _find = repository.find } func find(id: UInt) -> Task<Void, DomainType, ErrorType> { return _find(id) } } let repository = AnyRepository(MemoryRecipeRepository()) // repository: AnyRepository<Recipe>
ViewController RecipeRepository WebAPIRecipeRepository RealmRecipeRepository Task<Void, Model, Error> [String: AnyObject] JSON
NSPredicate RealmObject AnyQuery
ViewController AnyRepository<Recipe> WebAPIRecipeRepository RealmRecipeRepository Task<Void, Model, Error> [String: AnyObject] JSON
NSPredicate RealmObject AnyQuery
࣮ྫ w IUUQTHJUIVCDPNOBPUZ1MBZHSPVOE USFFNBTUFS3FQPTJUPSZ
Ԡ༻ྫΩϟογϡ
Ωϟογϡ w ϦϙδτϦ͔Βऔಘͨ݁͠ՌΛΩϟογϡ͍ͨ͠ɻ w Ωϟογϡʹͳ͚ΕผͷϦϙδτϦ͔Βऔಘͯ͠ɺ Ωϟογϡʹอଘ্ͨ͠Ͱฦ͢ɻ w Ωϟογϡʹ͋Εฦ͢ɻ w ྫϩάΠϯϢʔβʔͷऔಘͳͲ
͋Γ͕ͱ͏͍͟͝·ͨ͠