migration utilities (beta)

CoreStore/Internal/NSManagedObjectModel+Setup.swift

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+//
+//  NSManagedObjectModel+Setup.swift
+//  CoreStore
+//
+//  Copyright (c) 2015 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 Foundation
+import CoreData
+
+
+// MARK: - NSManagedObjectModel
+
+internal extension NSManagedObjectModel {
+    
+    // MARK: Internal
+    
+    func entityNameForClass(entityClass: AnyClass) -> String {
+        
+        return self.entityNameMapping[NSStringFromClass(entityClass)]!
+    }
+    
+    func configurationsForClass(entityClass: AnyClass) -> Set<String> {
+        
+        return self.entityConfigurationsMapping[NSStringFromClass(entityClass)]!
+    }
+    
+    
+    // MARK: Private
+    
+    
+    internal var entityNameMapping: [String: String] {
+        
+        get {
+            
+            if let mapping: NSDictionary? = getAssociatedObjectForKey(&PropertyKeys.entityNameMapping, inObject: self) {
+                
+                return mapping as! [String: String]
+            }
+            
+            let mapping = self.entities.reduce([String: String]()) {
+                (var mapping, entityDescription) -> [String: String] in
+                
+                if let entityName = entityDescription.name {
+                    
+                    let className = entityDescription.managedObjectClassName
+                    mapping[className] = entityName
+                }
+                return mapping
+            }
+            setAssociatedCopiedObject(
+                mapping as NSDictionary,
+                forKey: &PropertyKeys.entityNameMapping,
+                inObject: self
+            )
+            return mapping
+        }
+    }
+    
+    private lazy var entityConfigurationsMapping: [String: Set<String>] = {
+        [unowned self] in
+        
+        return self.configurations.reduce([String: Set<String>]()) {
+            (var mapping, configuration) -> [String: Set<String>] in
+            
+            return (self.entitiesForConfiguration(configuration) ?? []).reduce(mapping) {
+                (var mapping, entityDescription) -> [String: Set<String>] in
+                
+                let className = entityDescription.managedObjectClassName
+                mapping[className]?.insert(configuration)
+                return mapping
+            }
+        }
+    }()
+    
+    private struct PropertyKeys {
+        
+        static var entityNameMapping: Void?
+        static var entityConfigurationsMapping: Void?
+    }
+}

CoreStore/Internal/RootManagedObjectModel.swift

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+//
+//  RootManagedObjectModel.swift
+//  CoreStore
+//
+//  Created by John Rommel Estropia on 2015/07/04.
+//  Copyright © 2015 John Rommel Estropia. All rights reserved.
+//
+
+import UIKit
+
+class RootManagedObjectModel: NSManagedObjectModel {
+
+}