Flatten file directories (fixes #159)

Sources/NSPersistentStore+Setup.swift

@@ -0,0 +1,81 @@
+//
+//  NSPersistentStore+Setup.swift
+//  CoreStore
+//
+//  Copyright © 2016 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: - NSPersistentStore
+
+internal extension NSPersistentStore {
+    
+    // MARK: Internal
+    
+    @nonobjc
+    internal var storageInterface: StorageInterface? {
+        
+        get {
+            
+            let wrapper: StorageObject? = cs_getAssociatedObjectForKey(
+                &PropertyKeys.storageInterface,
+                inObject: self
+            )
+            return wrapper?.storageInterface
+        }
+        set {
+            
+            cs_setAssociatedRetainedObject(
+                StorageObject(newValue),
+                forKey: &PropertyKeys.storageInterface,
+                inObject: self
+            )
+        }
+    }
+    
+    
+    // MARK: Private
+    
+    private struct PropertyKeys {
+        
+        static var storageInterface: Void?
+    }
+}
+
+
+// MARK: - StorageObject
+
+fileprivate class StorageObject: NSObject {
+    
+    // MARK: Private
+    
+    @nonobjc
+    fileprivate let storageInterface: StorageInterface?
+    
+    @nonobjc
+    fileprivate init(_ storage: StorageInterface?) {
+        
+        self.storageInterface = storage
+    }
+}