WIP: allow migrations for CoreStoreObjects

Sources/Internal/NSEntityDescription+DynamicModel.swift

@@ -0,0 +1,76 @@
+//
+//  NSEntityDescription+DynamicModel.swift
+//  CoreStore
+//
+//  Copyright © 2017 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: - NSEntityDescription
+
+internal extension NSEntityDescription {
+    
+    @nonobjc
+    internal var anyEntity: CoreStoreSchema.AnyEntity? {
+        
+        get {
+            
+            guard let userInfo = self.userInfo,
+                let typeName = userInfo[UserInfoKey.CoreStoreManagedObjectTypeName] as! String?,
+                let entityName = userInfo[UserInfoKey.CoreStoreManagedObjectEntityName] as! String? else {
+                    
+                    return nil
+            }
+            return CoreStoreSchema.AnyEntity(
+                type: NSClassFromString(typeName) as! CoreStoreObject.Type,
+                entityName: entityName
+            )
+        }
+        set {
+            
+            if let newValue = newValue {
+                
+                self.userInfo = [
+                    UserInfoKey.CoreStoreManagedObjectTypeName: NSStringFromClass(newValue.type),
+                    UserInfoKey.CoreStoreManagedObjectEntityName: newValue.entityName
+                ]
+            }
+            else {
+                
+                self.userInfo = [:]
+            }
+        }
+    }
+    
+    
+    // MARK: Private
+    
+    // MARK: - UserInfoKey
+    
+    fileprivate enum UserInfoKey {
+        
+        fileprivate static let CoreStoreManagedObjectTypeName = "CoreStoreManagedObjectTypeName"
+        fileprivate static let CoreStoreManagedObjectEntityName = "CoreStoreManagedObjectEntityName"
+    }
+}