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Swift builder pattern
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| import Foundation | |
| //sources : | |
| //https://blog.xebia.fr/2016/12/28/design-pattern-builder-et-builder-sont-dans-un-bateau/ | |
| //https://jlordiales.me/2012/12/13/the-builder-pattern-in-practice/ | |
| //https://pastebin.com/CXyxh658 | |
| class Window { } | |
| class Door { } | |
| class Wall { } | |
| class Roof { } | |
| class House { | |
| var windows: [Window]? | |
| var doors: [Door]? | |
| var walls: [Wall]? | |
| var roof: Roof? | |
| init(builder: HouseBuilder) { | |
| self.walls = builder.walls | |
| self.roof = builder.roof | |
| self.doors = builder.optionalDoors | |
| self.windows = builder.optionalWindows | |
| } | |
| } | |
| public class HouseBuilder { | |
| var walls: [Wall] | |
| var roof: Roof | |
| var optionalWindows: [Window]? | |
| var optionalDoors: [Door]? | |
| public init() { | |
| //have to initialize all fields ... | |
| walls = [Wall]() | |
| roof = Roof() | |
| } | |
| func getWallsRequiredBuilder(roof: Roof) -> WallsRequiredBuilder{ | |
| self.roof = roof | |
| return WallsRequiredBuilder(builder: self) | |
| } | |
| public class WallsRequiredBuilder { | |
| private let builder: HouseBuilder | |
| init(builder: HouseBuilder) { | |
| self.builder = builder | |
| } | |
| func setWalls(walls: [Wall]) -> OptionalWindowsBuilder { | |
| builder.walls = walls | |
| return OptionalWindowsBuilder(builder: builder) | |
| } | |
| } | |
| public class OptionalWindowsBuilder { | |
| private let builder: HouseBuilder | |
| init(builder: HouseBuilder) { | |
| self.builder = builder | |
| } | |
| func build() -> House { | |
| return House(builder: builder) | |
| } | |
| } | |
| } |
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| import Foundation | |
| let walls = [Wall(), Wall(), Wall(), Wall()] | |
| let windows = [Window(), Window()] | |
| let roof = Roof() | |
| let house = HouseBuilder() | |
| .getWallsRequiredBuilder(roof: roof) | |
| .setWalls(walls: walls) | |
| .build() | |
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