mirror of
https://github.com/JohnEstropia/CoreStore.git
synced 2026-03-20 00:24:26 +01:00
Field.Relationship propertyWrapper
This commit is contained in:
John Estropia
346
Sources/Field.Relationship.swift
Normal file
346
Sources/Field.Relationship.swift
Normal file
@@ -0,0 +1,346 @@
|
||||
//
|
||||
// Field.ToOne.swift
|
||||
// CoreStore
|
||||
//
|
||||
// Copyright © 2020 John Rommel Estropia
|
||||
//
|
||||
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
// of this software and associated documentation files (the "Software"), to deal
|
||||
// in the Software without restriction, including without limitation the rights
|
||||
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
// copies of the Software, and to permit persons to whom the Software is
|
||||
// furnished to do so, subject to the following conditions:
|
||||
//
|
||||
// The above copyright notice and this permission notice shall be included in all
|
||||
// copies or substantial portions of the Software.
|
||||
//
|
||||
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
||||
// SOFTWARE.
|
||||
//
|
||||
|
||||
import CoreData
|
||||
import Foundation
|
||||
|
||||
|
||||
// MARK: - FieldContainer
|
||||
|
||||
extension FieldContainer {
|
||||
|
||||
// MARK: - Relationship
|
||||
|
||||
@propertyWrapper
|
||||
// @dynamicMemberLookup
|
||||
public struct Relationship<V: FieldRelationshipType>: RelationshipKeyPathStringConvertible, FieldRelationshipProtocol {
|
||||
|
||||
public typealias DeleteRule = RelationshipContainer<O>.DeleteRule
|
||||
|
||||
|
||||
// MARK: @propertyWrapper
|
||||
|
||||
@available(*, unavailable)
|
||||
public var wrappedValue: V {
|
||||
|
||||
get { fatalError() }
|
||||
set { fatalError() }
|
||||
}
|
||||
|
||||
public var projectedValue: Self {
|
||||
|
||||
return self
|
||||
}
|
||||
|
||||
public static subscript(
|
||||
_enclosingInstance instance: O,
|
||||
wrapped wrappedKeyPath: ReferenceWritableKeyPath<O, V>,
|
||||
storage storageKeyPath: ReferenceWritableKeyPath<O, Self>
|
||||
) -> V {
|
||||
|
||||
get {
|
||||
|
||||
Internals.assert(
|
||||
instance.rawObject != nil,
|
||||
"Attempted to access values from a \(Internals.typeName(O.self)) meta object. Meta objects are only used for querying keyPaths and infering types."
|
||||
)
|
||||
return self.read(field: instance[keyPath: storageKeyPath], for: instance.rawObject!) as! V
|
||||
}
|
||||
set {
|
||||
|
||||
Internals.assert(
|
||||
instance.rawObject != nil,
|
||||
"Attempted to access values from a \(Internals.typeName(O.self)) meta object. Meta objects are only used for querying keyPaths and infering types."
|
||||
)
|
||||
return self.modify(field: instance[keyPath: storageKeyPath], for: instance.rawObject!, newValue: newValue)
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// MARK: AnyKeyPathStringConvertible
|
||||
|
||||
public var cs_keyPathString: String {
|
||||
|
||||
return self.keyPath
|
||||
}
|
||||
|
||||
|
||||
// MARK: KeyPathStringConvertible
|
||||
|
||||
public typealias ObjectType = O
|
||||
public typealias DestinationValueType = V.DestinationObjectType
|
||||
|
||||
|
||||
// MARK: RelationshipKeyPathStringConvertible
|
||||
|
||||
public typealias ReturnValueType = V
|
||||
|
||||
|
||||
// MARK: PropertyProtocol
|
||||
|
||||
internal let keyPath: KeyPathString
|
||||
|
||||
|
||||
// MARK: FieldProtocol
|
||||
|
||||
internal static func read(field: FieldProtocol, for rawObject: CoreStoreManagedObject) -> Any? {
|
||||
|
||||
Internals.assert(
|
||||
rawObject.isRunningInAllowedQueue() == true,
|
||||
"Attempted to access \(Internals.typeName(O.self))'s value outside it's designated queue."
|
||||
)
|
||||
let field = field as! Self
|
||||
let keyPath = field.keyPath
|
||||
return V.cs_toReturnType(
|
||||
from: rawObject.value(forKey: keyPath) as! V.NativeValueType?
|
||||
)
|
||||
}
|
||||
|
||||
internal static func modify(field: FieldProtocol, for rawObject: CoreStoreManagedObject, newValue: Any?) {
|
||||
|
||||
Internals.assert(
|
||||
rawObject.isRunningInAllowedQueue() == true,
|
||||
"Attempted to access \(Internals.typeName(O.self))'s value outside it's designated queue."
|
||||
)
|
||||
Internals.assert(
|
||||
rawObject.isEditableInContext() == true,
|
||||
"Attempted to update a \(Internals.typeName(O.self))'s value from outside a transaction."
|
||||
)
|
||||
let newValue = newValue as! V
|
||||
let field = field as! Self
|
||||
let keyPath = field.keyPath
|
||||
return rawObject.setValue(
|
||||
V.cs_toNativeType(from: newValue),
|
||||
forKey: keyPath
|
||||
)
|
||||
}
|
||||
|
||||
|
||||
// MARK: FieldRelationshipProtocol
|
||||
|
||||
internal let entityDescriptionValues: () -> FieldRelationshipProtocol.EntityDescriptionValues
|
||||
|
||||
internal static func valueForSnapshot(field: FieldProtocol, for rawObject: CoreStoreManagedObject) -> Any? {
|
||||
|
||||
Internals.assert(
|
||||
rawObject.isRunningInAllowedQueue() == true,
|
||||
"Attempted to access \(Internals.typeName(O.self))'s value outside it's designated queue."
|
||||
)
|
||||
let field = field as! Self
|
||||
let keyPath = field.keyPath
|
||||
return V.cs_valueForSnapshot(
|
||||
from: rawObject.value(forKey: keyPath) as! V.NativeValueType?
|
||||
)
|
||||
}
|
||||
|
||||
|
||||
// MARK: FilePrivate
|
||||
|
||||
fileprivate init(
|
||||
keyPath: KeyPathString,
|
||||
isToMany: Bool,
|
||||
isOrdered: Bool,
|
||||
deleteRule: DeleteRule,
|
||||
inverseKeyPath: @escaping () -> KeyPathString?,
|
||||
versionHashModifier: @escaping () -> String?,
|
||||
renamingIdentifier: @escaping () -> String?,
|
||||
affectedByKeyPaths: @escaping () -> Set<KeyPathString>,
|
||||
minCount: Int,
|
||||
maxCount: Int
|
||||
) {
|
||||
|
||||
self.keyPath = keyPath
|
||||
self.entityDescriptionValues = {
|
||||
|
||||
let range = (Swift.max(0, minCount) ... maxCount)
|
||||
return (
|
||||
isToMany: isToMany,
|
||||
isOrdered: isOrdered,
|
||||
deleteRule: deleteRule.nativeValue,
|
||||
inverse: (type: V.DestinationObjectType.self, keyPath: inverseKeyPath()),
|
||||
versionHashModifier: versionHashModifier(),
|
||||
renamingIdentifier: renamingIdentifier(),
|
||||
affectedByKeyPaths: affectedByKeyPaths(),
|
||||
minCount: range.lowerBound,
|
||||
maxCount: range.upperBound
|
||||
)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
extension FieldContainer.Relationship where V: FieldRelationshipToOneType {
|
||||
|
||||
public init(
|
||||
_ keyPath: KeyPathString,
|
||||
deleteRule: DeleteRule = .nullify,
|
||||
versionHashModifier: @autoclosure @escaping () -> String? = nil,
|
||||
previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
|
||||
affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
|
||||
) {
|
||||
|
||||
self.init(
|
||||
keyPath: keyPath,
|
||||
isToMany: false,
|
||||
isOrdered: false,
|
||||
deleteRule: deleteRule,
|
||||
inverseKeyPath: { nil },
|
||||
versionHashModifier: versionHashModifier,
|
||||
renamingIdentifier: previousVersionKeyPath,
|
||||
affectedByKeyPaths: affectedByKeyPaths,
|
||||
minCount: 0,
|
||||
maxCount: 1
|
||||
)
|
||||
}
|
||||
|
||||
public init<D>(
|
||||
_ keyPath: KeyPathString,
|
||||
inverse: KeyPath<V.DestinationObjectType, FieldContainer<V.DestinationObjectType>.Relationship<D>>,
|
||||
deleteRule: DeleteRule = .nullify,
|
||||
versionHashModifier: @autoclosure @escaping () -> String? = nil,
|
||||
previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
|
||||
affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
|
||||
) where D: FieldRelationshipType {
|
||||
|
||||
self.init(
|
||||
keyPath: keyPath,
|
||||
isToMany: false,
|
||||
isOrdered: false,
|
||||
deleteRule: deleteRule,
|
||||
inverseKeyPath: { V.DestinationObjectType.meta[keyPath: inverse].keyPath },
|
||||
versionHashModifier: versionHashModifier,
|
||||
renamingIdentifier: previousVersionKeyPath,
|
||||
affectedByKeyPaths: affectedByKeyPaths,
|
||||
minCount: 0,
|
||||
maxCount: 1
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
extension FieldContainer.Relationship: ToManyRelationshipKeyPathStringConvertible where V: FieldRelationshipToManyType {}
|
||||
|
||||
extension FieldContainer.Relationship where V: FieldRelationshipToManyOrderedType {
|
||||
|
||||
public init(
|
||||
_ keyPath: KeyPathString,
|
||||
minCount: Int = 0,
|
||||
maxCount: Int = 0,
|
||||
deleteRule: DeleteRule = .nullify,
|
||||
versionHashModifier: @autoclosure @escaping () -> String? = nil,
|
||||
previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
|
||||
affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
|
||||
) {
|
||||
|
||||
self.init(
|
||||
keyPath: keyPath,
|
||||
isToMany: true,
|
||||
isOrdered: true,
|
||||
deleteRule: deleteRule,
|
||||
inverseKeyPath: { nil },
|
||||
versionHashModifier: versionHashModifier,
|
||||
renamingIdentifier: previousVersionKeyPath,
|
||||
affectedByKeyPaths: affectedByKeyPaths,
|
||||
minCount: minCount,
|
||||
maxCount: maxCount
|
||||
)
|
||||
}
|
||||
|
||||
public init<D>(
|
||||
_ keyPath: KeyPathString,
|
||||
minCount: Int = 0,
|
||||
maxCount: Int = 0,
|
||||
inverse: @escaping (V.DestinationObjectType) -> FieldContainer<V.DestinationObjectType>.Relationship<D>,
|
||||
deleteRule: DeleteRule = .nullify,
|
||||
versionHashModifier: @autoclosure @escaping () -> String? = nil,
|
||||
previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
|
||||
affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
|
||||
) where D: FieldRelationshipType {
|
||||
|
||||
self.init(
|
||||
keyPath: keyPath,
|
||||
isToMany: true,
|
||||
isOrdered: true,
|
||||
deleteRule: deleteRule,
|
||||
inverseKeyPath: { inverse(V.DestinationObjectType.meta).keyPath },
|
||||
versionHashModifier: versionHashModifier,
|
||||
renamingIdentifier: previousVersionKeyPath,
|
||||
affectedByKeyPaths: affectedByKeyPaths,
|
||||
minCount: minCount,
|
||||
maxCount: maxCount
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
extension FieldContainer.Relationship where V: FieldRelationshipToManyUnorderedType {
|
||||
|
||||
public init(
|
||||
_ keyPath: KeyPathString,
|
||||
minCount: Int = 0,
|
||||
maxCount: Int = 0,
|
||||
deleteRule: DeleteRule = .nullify,
|
||||
versionHashModifier: @autoclosure @escaping () -> String? = nil,
|
||||
previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
|
||||
affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
|
||||
) {
|
||||
|
||||
self.init(
|
||||
keyPath: keyPath,
|
||||
isToMany: true,
|
||||
isOrdered: false,
|
||||
deleteRule: deleteRule,
|
||||
inverseKeyPath: { nil },
|
||||
versionHashModifier: versionHashModifier,
|
||||
renamingIdentifier: previousVersionKeyPath,
|
||||
affectedByKeyPaths: affectedByKeyPaths,
|
||||
minCount: minCount,
|
||||
maxCount: maxCount
|
||||
)
|
||||
}
|
||||
|
||||
public init<D>(
|
||||
_ keyPath: KeyPathString,
|
||||
minCount: Int = 0,
|
||||
maxCount: Int = 0,
|
||||
inverse: @escaping (V.DestinationObjectType) -> FieldContainer<V.DestinationObjectType>.Relationship<D>,
|
||||
deleteRule: DeleteRule = .nullify,
|
||||
versionHashModifier: @autoclosure @escaping () -> String? = nil,
|
||||
previousVersionKeyPath: @autoclosure @escaping () -> String? = nil,
|
||||
affectedByKeyPaths: @autoclosure @escaping () -> Set<KeyPathString> = []
|
||||
) where D: FieldRelationshipType {
|
||||
|
||||
self.init(
|
||||
keyPath: keyPath,
|
||||
isToMany: true,
|
||||
isOrdered: false,
|
||||
deleteRule: deleteRule,
|
||||
inverseKeyPath: { inverse(V.DestinationObjectType.meta).keyPath },
|
||||
versionHashModifier: versionHashModifier,
|
||||
renamingIdentifier: previousVersionKeyPath,
|
||||
affectedByKeyPaths: affectedByKeyPaths,
|
||||
minCount: minCount,
|
||||
maxCount: maxCount
|
||||
)
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user