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Swift 4Ͱߦ͏DTOͱDAOͷ૬ޓม
DevSapษڧձ 17/09/23
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ੁݪ ༞
@yusuga_
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No content
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VO, DTO, POSO, DAOͱ
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VO, DTO, POSO, DAOͱ
4 VO (Value Object)
4 getterͷΈ
4 ෆม
VO, DTO, POSO, DAO, Entity ͷҧ͍
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VO, DTO, POSO, DAOͱ
4 DTO (Data Transfer Object)
4 VO + setter
4 Մมɻ֎͔ΒมߋՄೳ
4 ҟͳΔϨΠϠʔؒʢϞσϧɺϏϡʔͳͲʣͰσʔλ
Λड͚͢ͷʹ͏
VO, DTO, POSO, DAO, Entity ͷҧ͍
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VO, DTO, POSO, DAOͱ
4 POSO (Plain Old Swift Object)
4 VODTOͷੑ࣭Λ࣋ͭ
4 Swift struct, enum
4 ໋໊ͷ༝དྷPOJO(Plain Old Java Object)
VO, DTO, POSO, DAO, Entity ͷҧ͍
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VO, DTO, POSO, DAOͱ
4 DAO (Data Access Object)
4 DBʹΞΫηε͠Λߋ৽ͨ͠Γ݁ՌΛฦ͢
VO, DTO, POSO, DAO, Entity ͷҧ͍
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͖͔͚ͬͨͬ
4 try! Swift Tokyo 2017
4 σʔλϨΠϠΛ͢Δ (LT)
4 ҿΈձͰʹ
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ͦ͏͍͑
4 Realm.RLMObject (RealmSwift.Object)
1. ελϯυΞϩʔϯͷRLMObject
2. Realm(σʔλϕʔε)ʹඥ͚ͮΒΕ͍ͯΔRLMObject
RealmͰελϯυΞϩʔϯͷRLMObjectΛ׆༻͢Δ
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ͦ͏͍͑
4 Realm.RLMObject (RealmSwift.Object)
1. ελϯυΞϩʔϯͷRLMObject
4 DTO
2. Realm(σʔλϕʔε)ʹඥ͚ͮΒΕ͍ͯΔRLMObject
4 DAO
RealmͰελϯυΞϩʔϯͷRLMObjectΛ׆༻͢Δ
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ҟͳΔϨΠϠʔؒͰͷσʔλͷड͚͠
MVC→MVP→MVVM→Fluxͷ࣮ͷҧ͍Λൺֱͯ͠ΈΔ
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DAOΛ͖͢Ͱͳ͍
4 Ͳ͜ͰͰσʔλϕʔεͷߋ৽͕Մೳʹͳͬͯ͠·͏
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DAOΛ͖͢Ͱͳ͍
4 Ͳ͜ͰͰσʔλϕʔεͷߋ৽͕Մೳʹͳͬͯ͠·͏
4 RealmʹݶͬͯɺDBʹඥ͍ͮͨObjectͷߋ৽ʹτϥ
ϯβΫγϣϯ͕ඞཁͰ͋ͬͨΓɺεϨουΛ·ͨ͛ͳ͍ͱ
͍͏੍͕͋Δ
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DAOΛ͖͢Ͱͳ͍
4 Ͳ͜ͰͰσʔλϕʔεͷߋ৽͕Մೳʹͳͬͯ͠·͏
4 RealmʹݶͬͯɺDBʹඥ͍ͮͨObjectͷߋ৽ʹτϥ
ϯβΫγϣϯ͕ඞཁͰ͋ͬͨΓɺεϨουΛ·ͨ͛ͳ͍ͱ
͍͏੍͕͋Δ
4 ͜ΕΒͷ༷ΛͲ͏ͬͯपͤ͞Δ͔ʁ
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DAOΛ͖͢Ͱͳ͍
4 Ͳ͜ͰͰσʔλϕʔεͷߋ৽͕Մೳʹͳͬͯ͠·͏
4 RealmʹݶͬͯɺDBʹඥ͍ͮͨObjectͷߋ৽ʹτϥ
ϯβΫγϣϯ͕ඞཁͰ͋ͬͨΓɺεϨουΛ·ͨ͛ͳ͍ͱ
͍͏੍͕͋Δ
4 ͜ΕΒͷ༷ΛͲ͏ͬͯपͤ͞Δ͔ʁ
4 ༷ॻ/ӡ༻ϧʔϧ → ❌
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DAOΛ͖͢Ͱͳ͍
4 Ͳ͜ͰͰσʔλϕʔεͷߋ৽͕Մೳʹͳͬͯ͠·͏
4 RealmʹݶͬͯɺDBʹඥ͍ͮͨObjectͷߋ৽ʹτϥ
ϯβΫγϣϯ͕ඞཁͰ͋ͬͨΓɺεϨουΛ·ͨ͛ͳ͍ͱ
͍͏੍͕͋Δ
4 ͜ΕΒͷ༷ΛͲ͏ͬͯपͤ͞Δ͔ʁ
4 ༷ॻ/ӡ༻ϧʔϧ → ❌
4 VO, DTOΛ͠ϓϩάϥϜతʹ੍ݶͤ͞Δ͖
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࣮: Objective-C࣌
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࣮: Objective-C࣌
4 Realm-JSONͷdeepCopy()Λ༻
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࣮: Objective-C࣌
4 Realm-JSONͷdeepCopy()Λ༻
4 தRealm.RLMPropertyΛར༻͠ϓϩύςΟΛղੳ
͠ɺ࠶ؼతʹίϐʔ
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// 1. ΦϒδΣΫτΛ࡞͢Δ
Person *author = [[Person alloc] init];
author.name = @"David Foster Wallace";
// 2. ΦϒδΣΫτΛRealmʹՃ͢Δ
[realm beginWriteTransaction];
[realm addObject:author];
[realm commitWriteTransaction]; // authorDAOʹͳΔ
// 3. อଘͨ͠authorΛίϐʔ
Person *copiedAuthor = [author deepcopy];
XCTAssertNil(copiedAuthor.realm); // true
XCTAssertEqualObjects(author, copiedAuthor); // true
// 4. τϥϯβΫγϣϯ͕ͳͯ͘มߋՄೳ
copiedAuthor = @"other name"; // DTO
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4 ৄ͘͠ɺRealmͰελϯυΞϩʔϯͷRLMObjectΛ׆༻
͢ΔΛ͝ཡ͍ͩ͘͞ɻ
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Objective-C࣌ͷऴᖼ
4 RealmSwiftͷొ
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Objective-C࣌ͷऴᖼ
4 RealmSwiftͷొ
4 RealmSwift.ObjectRLMObjectBaseΛܧঝ
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Objective-C࣌ͷऴᖼ
4 RealmSwiftͷొ
4 RealmSwift.ObjectRLMObjectBaseΛܧঝ
4 Realm-JSONͷdeepCopy()͕͑ͳ͘ͳΔ
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Objective-C࣌ͷऴᖼ
4 RealmSwiftͷొ
4 RealmSwift.ObjectRLMObjectBaseΛܧঝ
4 Realm-JSONͷdeepCopy()͕͑ͳ͘ͳΔ
4 ࣌ସͳ͠
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࣮: Swift 3࣌
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࣮: Swift 3࣌
4 ObjectMapperΛ༻
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࣮: Swift 3࣌
4 ObjectMapperΛ༻
4 Object to JSON / JSON to Object͕Մೳ
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࣮: Swift 3࣌
4 ObjectMapperΛ༻
4 Object to JSON / JSON to Object͕Մೳ
4 SwiftͷStructʹద༻Ͱ͖Δʂ
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࡞ͬͨ
TransformableObject
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TransformableObject
public protocol TransformableObject {
associatedtype TransformedObject
}
public extension TransformableObject
where Self: Mappable, TransformedObject: Mappable {
func transformToObject() -> TransformedObject? {
return TransformedObject(JSON: toJSON())
}
}
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ڞ௨͢Δgetter/setterͷprotocol
protocol ObjectType: Mappable {
var bool: Bool { get set }
var int: Int { get set }
var float: Float { get set }
var double: Double { get set }
var string: String { get set }
var date: Date { get set }
var data: Data { get set }
}
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ObjectMapperͷϚοϐϯά
extension ObjectType {
mutating func mapping(map: Map) {
bool <- map["bool"]
int <- map["int"]
float <- map["float"]
double <- map["double"]
string <- map["string"]
date <- (map["date"], DateTransform())
data <- (map["data"], DataTransform())
}
}
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POSOͷఆٛ
struct Struct: ObjectType {
var bool = false
var int = 0
var float: Float = 0
var double: Double = 0
var string = ""
var date = Date()
var data = Data()
init?(map: Map) { }
}
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DAOͷఆٛ
class RealmObject: Object, ObjectType {
dynamic var bool = false
dynamic var int = 0
dynamic var float: Float = 0
dynamic var double: Double = 0
dynamic var string = ""
dynamic var date = Date()
dynamic var data = Data()
required convenience init?(map: Map) {
self.init()
}
}
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TransformableObjectʹ४ڌ
extension Struct: TransformableObject {
typealias TransformedObject = RealmObject
}
extension RealmObject: TransformableObject {
typealias TransformedObject = Struct
}
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Struct → RealmSwift.Object
let obj = Struct(JSON: JSONCreator.json())!
let realmObj = obj.transformToObject()!
RealmSwift.Object → Struct
let realmObj = RealmObject(JSON: JSONCreator.json())!
let obj = obj.transformToObject()!
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ར༻γʔϯ
let editVC = R.storyboard
.ownerEditViewController
.instantiateInitialViewController()!
editVC.owner = userList.owner!.transformToObject() // 1. DAO ! POSO
editVC.ownerUpdated
.map { $0.transformToObject() } // 2. POSO ! DTO
.bind(to: Realm.rx.add(update: true))
.disposed(by: disposeBag)
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σϝϦοτ
4 ObjectMapperͷϚοϐϯάΛॻ͘ͷ͕ࡶ
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σϝϦοτ
4 ObjectMapperͷϚοϐϯάΛॻ͘ͷ͕ࡶ
4 RealmSwift.ObjectͱStructͰಉ͡ఆٛΛॻ͘ͷ͕ࡶ
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σϝϦοτ
4 ObjectMapperͷϚοϐϯάΛॻ͘ͷ͕ࡶ
4 RealmSwift.ObjectͱStructͰಉ͡ఆٛΛॻ͘ͷ͕ࡶ
4 StructΛ͏ͳΒ͠ΐ͏͕ͳ͍
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࣮: Swift 4࣌
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࣮: Swift 4࣌
4 Codable protocolͷొ
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࣮: Swift 4࣌
4 Codable protocolͷొ
4 Swift 4ͷFoundationʹCodable͕Ճ͞Εͨ
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࣮: Swift 4࣌
4 Codable protocolͷొ
4 Swift 4ͷFoundationʹCodable͕Ճ͞Εͨ
4 Codableclass, struct, enumͷͯ͢ͷγϦΞϥΠ
ζ/σγϦΞϥΠζΛՄೳʹ͍ͯ͠Δ
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࣮: Swift 4࣌
4 Codable protocolͷొ
4 Swift 4ͷFoundationʹCodable͕Ճ͞Εͨ
4 Codableclass, struct, enumͷͯ͢ͷγϦΞϥΠ
ζ/σγϦΞϥΠζΛՄೳʹ͍ͯ͠Δ
4 ܕ҆શੑ
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Codable
public typealias Codable = Decodable & Encodable
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ఆٛ
public struct Location : Codable { // 1
public let latitude: Double
public let longitude: Double
}
public enum Animal : Int, Codable { // 2
case chicken = 1
case dog
case turkey
case cow
}
public struct Farm : Codable { // 3
public let name: String
public let location: Location
public let animals: [Animal]
}
SE-0166
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Encoder / Decoder
4 JSONEncoder / JSONDecoder
4 PropertyListEncoder / PropertyListDecoder
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༻ํ๏
let farm = Farm(name: "Old MacDonald's Farm",
location: Location(latitude: 51.621648,
longitude: 0.269273),
animals: [.chicken, .dog, .cow, .turkey,
.dog, .chicken, .cow, .turkey, .dog])
let payload: Data = try JSONEncoder().encode(farm) // 1
do {
let farm = try JSONDecoder().decode(Farm.self, from: payload) // 2
// Extracted as user types:
let coordinates = "\(farm.location.latitude, farm.location.longitude)"
} catch {
// Encountered error during deserialization
}
SE-0166
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Codable
4 ObjectMapperͰߦͳ͍ͬͯͨϚοϐϯάΛCodableʹஔ
͖͑ΒΕͦ͏
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࡞ͬͨ
ObjectConvertible
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ObjectConvertible
public protocol ObjectConvertible: Encodable {}
public extension ObjectConvertible {
func convert() throws -> T {
return try JSONDecoder().decode(
T.self,
from: try JSONEncoder().encode(self))
}
}
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Ϟσϧڞ௨ͷgetter
protocol ObjectType {
var bool: Bool { get }
var int: Int { get }
var float: Float { get }
var double: Double { get }
var string: String { get }
}
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POSOͷఆٛ
struct Object: ObjectType,
Codable, ObjectConvertible {
var bool: Bool
var int: Int
var float: Float
var double: Double
var string: String
}
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DAOͷఆٛ
@objcMembers
class RealmObject: RealmSwift.Object, ObjectType,
Codable, ObjectConvertible {
dynamic var bool = false
dynamic var int = 0
dynamic var float: Float = 0
dynamic var double: Double = 0
dynamic var string = ""
}
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POSOͷม
extension Object {
/// 1. POSO ! VO
var VO: ObjectType {
return self
}
/// 2. POSO ! DAO(DTO)
func convertToDAO() throws -> RealmObject {
return try convert()
}
}
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DAOͷม
extension RealmObject {
/// 1. DAO ! POSO
func convertToPOSO() throws -> Object {
return try convert()
}
/// 2. DAO ! DTO
func convertToDTO() throws -> RealmObject {
return try convert()
}
/// 3. DAO ! VO
func convertToVO() throws -> ObjectType {
return try convertToDTO()
}
}
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มͷࣦഊ
// Swift.DecodingError.keyNotFound
let obj: RealmObject = try! Person().convert()
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มͷࣦഊ
// Swift.DecodingError.keyNotFound
let obj: RealmObject = try! Person().convert()
4 ͪΖΜఆ͕ٛҰக͠ͳ͍Ϟσϧؒͷมɺσίʔυ·
ͨΤϯίʔυͷྫ֎͕ൃੜ͢Δ
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มͷࣦഊ
// Swift.DecodingError.keyNotFound
let obj: RealmObject = try! Person().convert()
4 ͪΖΜఆ͕ٛҰக͠ͳ͍Ϟσϧؒͷมɺσίʔυ·
ͨΤϯίʔυͷྫ֎͕ൃੜ͢Δ
4 ݱঢ়ͷҊͰObjectConvertibleͰdecodeՄೳͳܕ੍
ݶͤͣɺϓϩάϥϚͷͰconvert()Λ༻͢Δͱ͍͏
ํ
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·ͱΊ
4 σʔλϨΠϠͷେࣄ
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·ͱΊ
4 σʔλϨΠϠͷେࣄ
4 ༷ॻӡ༻ϧʔϧͰͳ͘ɺϓϩάϥϜͰ༷ΛറΔ
͖ɹ
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·ͱΊ
4 σʔλϨΠϠͷେࣄ
4 ༷ॻӡ༻ϧʔϧͰͳ͘ɺϓϩάϥϜͰ༷ΛറΔ
͖ɹ
4 ࣮ͷࡶ͞ͱτϨʔυΦϑ
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·ͱΊ
4 σʔλϨΠϠͷେࣄ
4 ༷ॻӡ༻ϧʔϧͰͳ͘ɺϓϩάϥϜͰ༷ΛറΔ
͖ɹ
4 ࣮ͷࡶ͞ͱτϨʔυΦϑ
4 Codableͷ͓͔͛Ͱ֎෦ϥΠϒϥϦʹґଘ͢Δ͜ͱͳ͘Ϛ
οϐϯά͔Ͱ͖ΔΑ͏ʹͳΓɺDecoder/EncoderΛհ͢
Δ͜ͱͰҟͳΔϞσϧؒͰͷϚοϐϯά༰қʹͳͬͨ
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͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠
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ࢀߟ/Ҿ༻
4 VO, DTO, POSO, DAO, Entity ͷҧ͍
4 MVC→MVP→MVVM→Fluxͷ࣮ͷҧ͍Λൺֱͯ͠ΈΔ
4 RealmͰελϯυΞϩʔϯͷRLMObjectΛ׆༻͢Δ
4 SE-0166