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Code Issues 95 Packages Projects Releases 10 Wiki Activity

WIP: ObjectRepresentable utilities

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This commit is contained in:
John Estropia
2019-10-14 21:36:03 +09:00
parent f5a165d47d
commit 6b64eb7650
17 changed files with 315 additions and 198 deletions
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48
Sources/ObjectMonitor.swift
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@@ -40,12 +40,7 @@ import CoreData
Observers registered via `addObserver(_:)` are not retained. `ObjectMonitor` only keeps a `weak` reference to all observers, thus keeping itself free from retain-cycles.
*/
@available(macOS 10.12, *)
public final class ObjectMonitor<D: DynamicObject>: Equatable {
/**
The type for the object contained by the `ObjectMonitor`
*/
public typealias ObjectType = D
public final class ObjectMonitor<D: DynamicObject>: ObjectRepresentation, Equatable {
/**
Returns the `DynamicObject` instance being observed, or `nil` if the object was already deleted.
@@ -125,6 +120,34 @@ public final class ObjectMonitor<D: DynamicObject>: Equatable {
public let userInfo = UserInfo()
// MARK: ObjectRepresentation
public typealias ObjectType = D
public static func cs_fromRaw(object: NSManagedObject) -> Self {
return self.init(
context: object.managedObjectContext!,
objectID: object.objectID
)
}
public func cs_id() -> ObjectType.ObjectID {
return self.objectID
}
public func cs_object() -> D? {
return self.object
}
public func cs_rawObject(in context: NSManagedObjectContext) -> NSManagedObject? {
return context.fetchExisting(self.objectID)
}
// MARK: Equatable
public static func == (lhs: ObjectMonitor<ObjectType>, rhs: ObjectMonitor<ObjectType>) -> Bool {
@@ -158,14 +181,14 @@ public final class ObjectMonitor<D: DynamicObject>: Equatable {
// MARK: Internal
internal convenience init(dataStack: DataStack, object: ObjectType) {
internal convenience init<O: ObjectRepresentation>(dataStack: DataStack, object: O) where O.ObjectType == ObjectType {
self.init(context: dataStack.mainContext, object: object)
self.init(context: dataStack.mainContext, objectID: object.cs_id())
}
internal convenience init(unsafeTransaction: UnsafeDataTransaction, object: ObjectType) {
internal convenience init<O: ObjectRepresentation>(unsafeTransaction: UnsafeDataTransaction, object: O) where O.ObjectType == ObjectType {
self.init(context: unsafeTransaction.context, object: object)
self.init(context: unsafeTransaction.context, objectID: object.cs_id())
}
internal func registerObserver<U: AnyObject>(_ observer: U, willChangeObject: @escaping (_ observer: U, _ monitor: ObjectMonitor<ObjectType>, _ object: ObjectType) -> Void, didDeleteObject: @escaping (_ observer: U, _ monitor: ObjectMonitor<ObjectType>, _ object: ObjectType) -> Void, didUpdateObject: @escaping (_ observer: U, _ monitor: ObjectMonitor<ObjectType>, _ object: ObjectType, _ changedPersistentKeys: Set<String>) -> Void) {
@@ -250,6 +273,7 @@ public final class ObjectMonitor<D: DynamicObject>: Equatable {
// MARK: Private
private let objectID: ObjectType.ObjectID
private let fetchedResultsController: Internals.CoreStoreFetchedResultsController
private let fetchedResultsControllerDelegate: Internals.FetchedResultsControllerDelegate
private var lastCommittedAttributes = [String: NSObject]()
@@ -258,9 +282,8 @@ public final class ObjectMonitor<D: DynamicObject>: Equatable {
private var didDeleteObjectKey: Void?
private var didUpdateObjectKey: Void?
private init(context: NSManagedObjectContext, object: ObjectType) {
private init(context: NSManagedObjectContext, objectID: ObjectType.ObjectID) {
let objectID = object.cs_id()
let fetchRequest = Internals.CoreStoreFetchRequest<NSManagedObject>()
fetchRequest.entity = objectID.entity
fetchRequest.fetchLimit = 0
@@ -278,6 +301,7 @@ public final class ObjectMonitor<D: DynamicObject>: Equatable {
let fetchedResultsControllerDelegate = Internals.FetchedResultsControllerDelegate()
self.objectID = objectID
self.fetchedResultsController = fetchedResultsController
self.fetchedResultsControllerDelegate = fetchedResultsControllerDelegate