added tool to convert existing NSManagedObjectModels to the new CoreStoreSchema

Sources/Migrating/Migration Mapping Providers/MigrationMappingProvider.swift

@@ -31,6 +31,78 @@ import Foundation
 
 public protocol MigrationMappingProvider {
     
-    associatedtype SourceType: DynamicObject
-    associatedtype DestinationType: DynamicObject
+    associatedtype SourceSchema: DynamicSchema
+    associatedtype DestinationSchema: DynamicSchema
+    
+    var sourceSchema: SourceSchema { get }
+    var destinationSchema: DestinationSchema { get }
+    
+    init(source: SourceSchema, destination: DestinationSchema)
+    
+//    func migrate(
+//        from oldObject: SourceType,
+//        to newObject: DestinationType,
+//        transaction: UnsafeDataTransaction
+//    )
+//    
+//    func forEachPropertyMapping(
+//        from oldObject: SourceType,
+//        to newObject: DestinationType,
+//        removed: (_ keyPath: KeyPath) -> Void,
+//        added: (_ keyPath: KeyPath) -> Void,
+//        transformed: (_ keyPath: KeyPath) -> Void,
+//        copied: (_ keyPath: KeyPath) -> Void
+//    )
+}
+
+public extension MigrationMappingProvider {
+    
+//    func migrate(from oldObject: SourceType, to newObject: DestinationType, transaction: UnsafeDataTransaction) {
+//        
+//        
+//    }
+//    
+//    func forEachPropertyMapping(from oldObject: SourceType, to newObject: DestinationType, removed: (_ keyPath: KeyPath) -> Void, added: (_ keyPath: KeyPath) -> Void, transformed: (_ keyPath: KeyPath) -> Void) {
+//        
+//        let oldAttributes = oldObject.cs_toRaw().entity.attributesByName
+//        let newAttributes = newObject.cs_toRaw().entity.attributesByName
+//        let oldAttributeKeys = Set(oldAttributes.keys)
+//        let newAttributeKeys = Set(newAttributes.keys)
+//        for keyPath in
+//    }
+}
+
+public extension MigrationMappingProvider {
+    
+}
+
+
+// MARK: - UnsafeMigrationProxyObject
+
+public final class UnsafeMigrationProxyObject {
+    
+    public subscript(kvcKey: KeyPath) -> CoreDataNativeType? {
+        
+        get {
+            
+            return self.rawObject.cs_accessValueForKVCKey(kvcKey)
+        }
+        set {
+            
+            self.rawObject.cs_setValue(newValue, forKVCKey: kvcKey)
+        }
+    }
+    
+    
+    // MARK: Internal
+    
+    internal init(_ rawObject: NSManagedObject) {
+        
+        self.rawObject = rawObject
+    }
+    
+    
+    // MARK: Private
+    
+    private let rawObject: NSManagedObject
 }