mirror of
https://github.com/JohnEstropia/CoreStore.git
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533 lines
26 KiB
Swift
533 lines
26 KiB
Swift
//
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// Field.Coded.swift
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// CoreStore
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//
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// Copyright © 2020 John Rommel Estropia
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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import CoreData
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import Foundation
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// MARK: - FieldContainer
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extension FieldContainer {
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// MARK: - Coded
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/**
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The containing type for stored property values. Any type that conforms to `FieldStorableType` are supported.
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```
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class Animal: CoreStoreObject {
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@Field.Stored("species")
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var species = ""
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@Field.Computed("pluralName", customGetter: Animal.pluralName(_:))
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var pluralName: String = ""
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@Field.PlistCoded("color")
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var color: UIColor?
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}
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```
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- Important: `Field` properties are required to be used as `@propertyWrapper`s. Any other declaration not using the `@Field.Stored(...) var` syntax will be ignored.
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*/
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@propertyWrapper
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public struct Coded<V>: AttributeKeyPathStringConvertible, FieldAttributeProtocol {
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/**
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Initializes the metadata for the property.
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```
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class Person: CoreStoreObject {
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@Field.Stored("title")
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var title: String = "Mr."
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@Field.Stored("name")
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var name: String = ""
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@Field.Computed("displayName", customGetter: Person.getName(_:))
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var displayName: String = ""
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private static func getName(_ partialObject: PartialObject<Person>) -> String {
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let cachedDisplayName = partialObject.primitiveValue(for: \.$displayName)
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if !cachedDisplayName.isEmpty {
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return cachedDisplayName
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}
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let title = partialObject.value(for: \.$title)
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let name = partialObject.value(for: \.$name)
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let displayName = "\(title) \(name)"
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partialObject.setPrimitiveValue(displayName, for: { $0.displayName })
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return displayName
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}
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}
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```
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- parameter initial: the initial value for the property when the object is first create
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- parameter keyPath: the permanent attribute name for this property.
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- parameter versionHashModifier: used to mark or denote a property as being a different "version" than another even if all of the values which affect persistence are equal. (Such a difference is important in cases where the properties are unchanged but the format or content of its data are changed.)
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- parameter previousVersionKeyPath: used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property's `keyPath` with a matching destination entity property's `previousVersionKeyPath` indicate that a property mapping should be configured to migrate from the source to the destination. If unset, the identifier will be the property's `keyPath`.
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- parameter customGetter: use this closure as an "override" for the default property getter. The closure receives a `PartialObject<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties' static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `PartialObject<O>`, make sure to use `PartialObject<O>.primitiveValue(for:)` instead of `PartialObject<O>.value(for:)`, which would unintentionally execute the same closure again recursively.
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- parameter customSetter: use this closure as an "override" for the default property setter. The closure receives a `PartialObject<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties' static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `PartialObject<O>`, make sure to use `PartialObject<O>.setPrimitiveValue(_:for:)` instead of `PartialObject<O>.setValue(_:for:)`, which would unintentionally execute the same closure again recursively.
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- parameter affectedByKeyPaths: a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.
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*/
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public init<Coder: FieldCoderType>(
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wrappedValue initial: @autoclosure @escaping () -> V,
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_ keyPath: KeyPathString,
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versionHashModifier: @autoclosure @escaping () -> String? = nil,
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previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
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coder fieldCoderType: Coder.Type,
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customGetter: ((_ partialObject: PartialObject<O>) -> V)? = nil,
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customSetter: ((_ partialObject: PartialObject<O>, _ newValue: V) -> Void)? = nil,
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affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
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) where Coder.FieldStoredValue == V {
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self.init(
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defaultValue: initial,
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keyPath: keyPath,
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isOptional: false,
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versionHashModifier: versionHashModifier,
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renamingIdentifier: previousVersionKeyPath,
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valueTransformer: { Internals.AnyFieldCoder(fieldCoderType) },
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customGetter: customGetter,
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customSetter: customSetter,
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affectedByKeyPaths: affectedByKeyPaths
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)
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}
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public init(
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wrappedValue initial: @autoclosure @escaping () -> V,
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_ keyPath: KeyPathString,
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versionHashModifier: @autoclosure @escaping () -> String? = nil,
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previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
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coder: (encode: (V) -> Data?, decode: (Data?) -> V),
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customGetter: ((_ partialObject: PartialObject<O>) -> V)? = nil,
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customSetter: ((_ partialObject: PartialObject<O>, _ newValue: V) -> Void)? = nil,
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affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
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) {
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self.init(
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defaultValue: initial,
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keyPath: keyPath,
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isOptional: false,
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versionHashModifier: versionHashModifier,
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renamingIdentifier: previousVersionKeyPath,
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valueTransformer: { Internals.AnyFieldCoder(tag: UUID(), encode: coder.encode, decode: coder.decode) },
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customGetter: customGetter,
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customSetter: customSetter,
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affectedByKeyPaths: affectedByKeyPaths
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)
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}
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// MARK: @propertyWrapper
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@available(*, unavailable)
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public var wrappedValue: V {
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get { fatalError() }
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set { fatalError() }
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}
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public var projectedValue: Self {
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return self
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}
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public static subscript(
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_enclosingInstance instance: O,
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wrapped wrappedKeyPath: ReferenceWritableKeyPath<O, V>,
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storage storageKeyPath: ReferenceWritableKeyPath<O, Self>
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) -> V {
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get {
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Internals.assert(
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instance.rawObject != nil,
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"Attempted to access values from a \(Internals.typeName(O.self)) meta object. Meta objects are only used for querying keyPaths and infering types."
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)
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return self.read(field: instance[keyPath: storageKeyPath], for: instance.rawObject!) as! V
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}
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set {
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Internals.assert(
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instance.rawObject != nil,
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"Attempted to access values from a \(Internals.typeName(O.self)) meta object. Meta objects are only used for querying keyPaths and infering types."
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)
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return self.modify(field: instance[keyPath: storageKeyPath], for: instance.rawObject!, newValue: newValue)
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}
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}
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// MARK: AnyKeyPathStringConvertible
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public var cs_keyPathString: String {
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return self.keyPath
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}
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// MARK: KeyPathStringConvertible
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public typealias ObjectType = O
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public typealias DestinationValueType = V
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// MARK: AttributeKeyPathStringConvertible
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public typealias ReturnValueType = DestinationValueType
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// MARK: PropertyProtocol
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internal let keyPath: KeyPathString
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// MARK: FieldProtocol
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internal static func read(field: FieldProtocol, for rawObject: CoreStoreManagedObject) -> Any? {
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Internals.assert(
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rawObject.isRunningInAllowedQueue() == true,
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"Attempted to access \(Internals.typeName(O.self))'s value outside it's designated queue."
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)
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let field = field as! Self
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if let customGetter = field.customGetter {
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return customGetter(PartialObject<O>(rawObject))
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}
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let keyPath = field.keyPath
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switch rawObject.value(forKey: keyPath) {
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case let rawValue as V:
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return rawValue
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default:
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return nil
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}
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}
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internal static func modify(field: FieldProtocol, for rawObject: CoreStoreManagedObject, newValue: Any?) {
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Internals.assert(
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rawObject.isRunningInAllowedQueue() == true,
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"Attempted to access \(Internals.typeName(O.self))'s value outside it's designated queue."
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)
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Internals.assert(
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rawObject.isEditableInContext() == true,
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"Attempted to update a \(Internals.typeName(O.self))'s value from outside a transaction."
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)
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let newValue = newValue as! V
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let field = field as! Self
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let keyPath = field.keyPath
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if let customSetter = field.customSetter {
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return customSetter(PartialObject<O>(rawObject), newValue)
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}
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return rawObject.setValue(newValue, forKey: keyPath)
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}
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// MARK: FieldAttributeProtocol
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internal let entityDescriptionValues: () -> FieldAttributeProtocol.EntityDescriptionValues
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internal var getter: CoreStoreManagedObject.CustomGetter? {
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let keyPath = self.keyPath
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guard let customGetter = self.customGetter else {
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return { (_ id: Any) -> Any? in
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let rawObject = id as! CoreStoreManagedObject
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rawObject.willAccessValue(forKey: keyPath)
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defer {
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rawObject.didAccessValue(forKey: keyPath)
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}
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switch rawObject.primitiveValue(forKey: keyPath) {
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case let valueBox as Internals.AnyFieldCoder.TransformableDefaultValueCodingBox:
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rawObject.setPrimitiveValue(valueBox.value, forKey: keyPath)
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return valueBox.value
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case let value:
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return value
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}
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}
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}
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return { (_ id: Any) -> Any? in
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let rawObject = id as! CoreStoreManagedObject
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rawObject.willAccessValue(forKey: keyPath)
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defer {
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rawObject.didAccessValue(forKey: keyPath)
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}
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let value = customGetter(PartialObject<O>(rawObject))
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return value
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}
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}
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internal var setter: CoreStoreManagedObject.CustomSetter? {
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guard let customSetter = self.customSetter else {
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return nil
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}
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let keyPath = self.keyPath
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return { (_ id: Any, _ newValue: Any?) -> Void in
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let rawObject = id as! CoreStoreManagedObject
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rawObject.willChangeValue(forKey: keyPath)
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defer {
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rawObject.didChangeValue(forKey: keyPath)
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}
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customSetter(
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PartialObject<O>(rawObject),
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newValue as! V
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)
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}
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}
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// MARK: FilePrivate
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fileprivate init(
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defaultValue: @escaping () -> Any?,
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keyPath: KeyPathString,
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isOptional: Bool,
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versionHashModifier: @escaping () -> String?,
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renamingIdentifier: @escaping () -> String?,
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valueTransformer: @escaping () -> Internals.AnyFieldCoder?,
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customGetter: ((_ partialObject: PartialObject<O>) -> V)?,
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customSetter: ((_ partialObject: PartialObject<O>, _ newValue: V) -> Void)? ,
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affectedByKeyPaths: @escaping () -> Set<KeyPathString>) {
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self.keyPath = keyPath
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self.entityDescriptionValues = {
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let fieldCoder = valueTransformer()
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return (
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attributeType: .transformableAttributeType,
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isOptional: isOptional,
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isTransient: false,
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allowsExternalBinaryDataStorage: false,
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versionHashModifier: versionHashModifier(),
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renamingIdentifier: renamingIdentifier(),
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valueTransformer: fieldCoder,
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affectedByKeyPaths: affectedByKeyPaths(),
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defaultValue: Internals.AnyFieldCoder.TransformableDefaultValueCodingBox(
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defaultValue: defaultValue(),
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fieldCoder: fieldCoder
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)
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)
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}
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self.customGetter = customGetter
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self.customSetter = customSetter
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}
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// MARK: Private
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private let customGetter: ((_ partialObject: PartialObject<O>) -> V)?
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private let customSetter: ((_ partialObject: PartialObject<O>, _ newValue: V) -> Void)?
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}
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}
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// MARK: - FieldContainer.Coded where V: FieldOptionalType
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extension FieldContainer.Coded where V: FieldOptionalType {
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/**
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Initializes the metadata for the property.
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```
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class Person: CoreStoreObject {
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@Field.Stored("title")
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var title: String = "Mr."
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@Field.Stored("name")
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var name: String = ""
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@Field.Computed("displayName", customGetter: Person.getName(_:))
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var displayName: String = ""
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private static func getName(_ partialObject: PartialObject<Person>) -> String {
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let cachedDisplayName = partialObject.primitiveValue(for: \.$displayName)
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if !cachedDisplayName.isEmpty {
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return cachedDisplayName
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}
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let title = partialObject.value(for: \.$title)
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let name = partialObject.value(for: \.$name)
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let displayName = "\(title) \(name)"
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partialObject.setPrimitiveValue(displayName, for: { $0.displayName })
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return displayName
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}
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}
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```
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- parameter initial: the initial value for the property when the object is first create
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- parameter keyPath: the permanent attribute name for this property.
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- parameter versionHashModifier: used to mark or denote a property as being a different "version" than another even if all of the values which affect persistence are equal. (Such a difference is important in cases where the properties are unchanged but the format or content of its data are changed.)
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- parameter previousVersionKeyPath: used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property's `keyPath` with a matching destination entity property's `previousVersionKeyPath` indicate that a property mapping should be configured to migrate from the source to the destination. If unset, the identifier will be the property's `keyPath`.
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- parameter customGetter: use this closure as an "override" for the default property getter. The closure receives a `PartialObject<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties' static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `PartialObject<O>`, make sure to use `PartialObject<O>.primitiveValue(for:)` instead of `PartialObject<O>.value(for:)`, which would unintentionally execute the same closure again recursively.
|
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- parameter customSetter: use this closure as an "override" for the default property setter. The closure receives a `PartialObject<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties' static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `PartialObject<O>`, make sure to use `PartialObject<O>.setPrimitiveValue(_:for:)` instead of `PartialObject<O>.setValue(_:for:)`, which would unintentionally execute the same closure again recursively.
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- parameter affectedByKeyPaths: a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.
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*/
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public init<Coder: FieldCoderType>(
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wrappedValue initial: @autoclosure @escaping () -> V = nil,
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_ keyPath: KeyPathString,
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versionHashModifier: @autoclosure @escaping () -> String? = nil,
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previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
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coder: Coder.Type,
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customGetter: ((_ partialObject: PartialObject<O>) -> V)? = nil,
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customSetter: ((_ partialObject: PartialObject<O>, _ newValue: V) -> Void)? = nil,
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affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
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) where Coder.FieldStoredValue == V.Wrapped {
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self.init(
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defaultValue: { initial().cs_wrappedValue },
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keyPath: keyPath,
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isOptional: true,
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versionHashModifier: versionHashModifier,
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renamingIdentifier: previousVersionKeyPath,
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valueTransformer: { Internals.AnyFieldCoder(coder) },
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customGetter: customGetter,
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customSetter: customSetter,
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affectedByKeyPaths: affectedByKeyPaths
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)
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}
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|
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public init(
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wrappedValue initial: @autoclosure @escaping () -> V = nil,
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_ keyPath: KeyPathString,
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versionHashModifier: @autoclosure @escaping () -> String? = nil,
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previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
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coder: (encode: (V) -> Data?, decode: (Data?) -> V),
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customGetter: ((_ partialObject: PartialObject<O>) -> V)? = nil,
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customSetter: ((_ partialObject: PartialObject<O>, _ newValue: V) -> Void)? = nil,
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affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
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) {
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self.init(
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defaultValue: { initial().cs_wrappedValue },
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keyPath: keyPath,
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isOptional: true,
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versionHashModifier: versionHashModifier,
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renamingIdentifier: previousVersionKeyPath,
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valueTransformer: { Internals.AnyFieldCoder(tag: UUID(), encode: coder.encode, decode: coder.decode) },
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customGetter: customGetter,
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customSetter: customSetter,
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affectedByKeyPaths: affectedByKeyPaths
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)
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}
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}
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|
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// MARK: - FieldContainer.Coded where V: DefaultNSSecureCodable
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|
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extension FieldContainer.Coded where V: DefaultNSSecureCodable {
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|
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/**
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Initializes the metadata for the property.
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```
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class Person: CoreStoreObject {
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@Field.Stored("title")
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var title: String = "Mr."
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|
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@Field.Stored("name")
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var name: String = ""
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|
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@Field.Computed("displayName", customGetter: Person.getName(_:))
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var displayName: String = ""
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|
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private static func getName(_ partialObject: PartialObject<Person>) -> String {
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let cachedDisplayName = partialObject.primitiveValue(for: \.$displayName)
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if !cachedDisplayName.isEmpty {
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return cachedDisplayName
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}
|
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let title = partialObject.value(for: \.$title)
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let name = partialObject.value(for: \.$name)
|
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let displayName = "\(title) \(name)"
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partialObject.setPrimitiveValue(displayName, for: { $0.displayName })
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return displayName
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}
|
|
}
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|
```
|
|
- parameter initial: the initial value for the property when the object is first create
|
|
- parameter keyPath: the permanent attribute name for this property.
|
|
- parameter versionHashModifier: used to mark or denote a property as being a different "version" than another even if all of the values which affect persistence are equal. (Such a difference is important in cases where the properties are unchanged but the format or content of its data are changed.)
|
|
- parameter previousVersionKeyPath: used to resolve naming conflicts between models. When creating an entity mapping between entities in two managed object models, a source entity property's `keyPath` with a matching destination entity property's `previousVersionKeyPath` indicate that a property mapping should be configured to migrate from the source to the destination. If unset, the identifier will be the property's `keyPath`.
|
|
- parameter customGetter: use this closure as an "override" for the default property getter. The closure receives a `PartialObject<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties' static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `PartialObject<O>`, make sure to use `PartialObject<O>.primitiveValue(for:)` instead of `PartialObject<O>.value(for:)`, which would unintentionally execute the same closure again recursively.
|
|
- parameter customSetter: use this closure as an "override" for the default property setter. The closure receives a `PartialObject<O>`, which acts as a fast, type-safe KVC interface for `CoreStoreObject`. The reason a `CoreStoreObject` instance is not passed directly is because the Core Data runtime is not aware of `CoreStoreObject` properties' static typing, and so loading those info everytime KVO invokes this accessor method incurs a cumulative performance hit (especially in KVO-heavy operations such as `ListMonitor` observing.) When accessing the property value from `PartialObject<O>`, make sure to use `PartialObject<O>.setPrimitiveValue(_:for:)` instead of `PartialObject<O>.setValue(_:for:)`, which would unintentionally execute the same closure again recursively.
|
|
- parameter affectedByKeyPaths: a set of key paths for properties whose values affect the value of the receiver. This is similar to `NSManagedObject.keyPathsForValuesAffectingValue(forKey:)`.
|
|
*/
|
|
public init(
|
|
wrappedValue initial: @autoclosure @escaping () -> V,
|
|
_ keyPath: KeyPathString,
|
|
versionHashModifier: @autoclosure @escaping () -> String? = nil,
|
|
previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
|
|
customGetter: ((_ partialObject: PartialObject<O>) -> V)? = nil,
|
|
customSetter: ((_ partialObject: PartialObject<O>, _ newValue: V) -> Void)? = nil,
|
|
affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
|
|
) {
|
|
|
|
self.init(
|
|
defaultValue: initial,
|
|
keyPath: keyPath,
|
|
isOptional: false,
|
|
versionHashModifier: versionHashModifier,
|
|
renamingIdentifier: previousVersionKeyPath,
|
|
valueTransformer: { Internals.AnyFieldCoder(FieldCoders.DefaultNSSecureCoding<V>.self) },
|
|
customGetter: customGetter,
|
|
customSetter: customSetter,
|
|
affectedByKeyPaths: affectedByKeyPaths
|
|
)
|
|
}
|
|
}
|
|
|
|
|
|
// MARK: - FieldContainer.Coded where V: FieldOptionalType, V.Wrapped: DefaultNSSecureCodable
|
|
|
|
extension FieldContainer.Coded where V: FieldOptionalType, V.Wrapped: DefaultNSSecureCodable {
|
|
|
|
public init(
|
|
wrappedValue initial: @autoclosure @escaping () -> V = nil,
|
|
_ keyPath: KeyPathString,
|
|
versionHashModifier: @autoclosure @escaping () -> String? = nil,
|
|
previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
|
|
customGetter: ((_ partialObject: PartialObject<O>) -> V)? = nil,
|
|
customSetter: ((_ partialObject: PartialObject<O>, _ newValue: V) -> Void)? = nil,
|
|
affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
|
|
) {
|
|
|
|
self.init(
|
|
defaultValue: { initial().cs_wrappedValue },
|
|
keyPath: keyPath,
|
|
isOptional: true,
|
|
versionHashModifier: versionHashModifier,
|
|
renamingIdentifier: previousVersionKeyPath,
|
|
valueTransformer: { Internals.AnyFieldCoder(FieldCoders.DefaultNSSecureCoding<V.Wrapped>.self) },
|
|
customGetter: customGetter,
|
|
customSetter: customSetter,
|
|
affectedByKeyPaths: affectedByKeyPaths
|
|
)
|
|
}
|
|
}
|