Flatten file directories (fixes #159)

Sources/CoreStoreBridge.swift

@@ -0,0 +1,168 @@
+//
+//  CoreStoreBridge.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
+
+
+// MARK: - CoreStoreObjectiveCType
+
+/**
+ `CoreStoreObjectiveCType`s are Objective-C accessible classes that represent CoreStore's Swift types.
+ */
+public protocol CoreStoreObjectiveCType: class, AnyObject {
+    
+    /**
+     The corresponding Swift type
+     */
+    associatedtype SwiftType
+    
+    /**
+     The bridged Swift instance
+     */
+    var bridgeToSwift: SwiftType { get }
+    
+    /**
+     Initializes this instance with the Swift instance to bridge from
+     */
+    init(_ swiftValue: SwiftType)
+}
+
+
+// MARK: - CoreStoreSwiftType
+
+/**
+ `CoreStoreSwiftType`s are CoreStore's Swift types that are bridgeable to Objective-C.
+ */
+public protocol CoreStoreSwiftType {
+    
+    /**
+     The corresponding Objective-C type
+     */
+    associatedtype ObjectiveCType
+    
+    /**
+     The bridged Objective-C instance
+     */
+    var bridgeToObjectiveC: ObjectiveCType { get }
+}
+
+
+// MARK: - Internal
+
+internal func bridge<T: CoreStoreSwiftType>(_ closure: () -> T) -> T.ObjectiveCType {
+    
+    return closure().bridgeToObjectiveC
+}
+
+internal func bridge<T: CoreStoreSwiftType>(_ closure: () -> T?) -> T.ObjectiveCType? {
+    
+    return closure()?.bridgeToObjectiveC
+}
+
+internal func bridge<T: CoreStoreSwiftType>(_ closure: () throws -> T) throws -> T.ObjectiveCType {
+    
+    do {
+        
+        return try closure().bridgeToObjectiveC
+    }
+    catch {
+        
+        throw error.bridgeToObjectiveC
+    }
+}
+
+internal func bridge(_ closure: () throws -> Void) throws {
+    
+    do {
+        
+        try closure()
+    }
+    catch {
+        
+        throw error.bridgeToObjectiveC
+    }
+}
+
+internal func bridge<T: CoreStoreSwiftType>(_ error: NSErrorPointer, _ closure: () throws -> T) -> T.ObjectiveCType? {
+    
+    do {
+        
+        let result = try closure()
+        error?.pointee = nil
+        return result.bridgeToObjectiveC
+    }
+    catch let swiftError {
+        
+        error?.pointee = swiftError.bridgeToObjectiveC
+        return nil
+    }
+}
+
+internal func bridge(_ error: NSErrorPointer, _ closure: () throws -> Void) -> Bool {
+    
+    do {
+        
+        try closure()
+        error?.pointee = nil
+        return true
+    }
+    catch let swiftError {
+        
+        error?.pointee = swiftError.bridgeToObjectiveC
+        return false
+    }
+}
+
+internal func bridge<T>(_ error: NSErrorPointer, _ closure: () throws -> T?) -> T? {
+    
+    do {
+        
+        let result = try closure()
+        error?.pointee = nil
+        return result
+    }
+    catch let swiftError {
+        
+        error?.pointee = swiftError.bridgeToObjectiveC
+        return nil
+    }
+}
+
+internal func bridge<T: CoreStoreSwiftType>(_ error: NSErrorPointer, _ closure: () throws -> [T]) -> [T.ObjectiveCType]? {
+    
+    do {
+        
+        let result = try closure()
+        error?.pointee = nil
+        return result.map { $0.bridgeToObjectiveC }
+    }
+    catch let swiftError {
+        
+        error?.pointee = swiftError.bridgeToObjectiveC
+        return nil
+    }
+}
+
+