Swift Package Manager support

Sources/Setting Up/SetupResult.swift

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+//
+//  PersistentStoreResult.swift
+//  CoreStore
+//
+//  Copyright © 2014 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: - SetupResult
+
+public enum SetupResult<T: StorageInterface>: BooleanType {
+    
+    case Success(T)
+    case Failure(NSError)
+    
+    
+    // MARK: BooleanType
+    
+    public var boolValue: Bool {
+        
+        switch self {
+            
+        case .Success: return true
+        case .Failure: return false
+        }
+    }
+    
+    
+    // MARK: Internal
+    
+    internal init(_ storage: T) {
+        
+        self = .Success(storage)
+    }
+    
+    internal init(_ error: NSError) {
+        
+        self = .Failure(error)
+    }
+    
+    internal init(_ errorCode: CoreStoreErrorCode) {
+        
+        self.init(errorCode, userInfo: nil)
+    }
+    
+    internal init(_ errorCode: CoreStoreErrorCode, userInfo: [NSObject: AnyObject]?) {
+        
+        self.init(NSError(coreStoreErrorCode: errorCode, userInfo: userInfo))
+    }
+}
+
+
+// MARK: - PersistentStoreResult
+
+/**
+ The `PersistentStoreResult` indicates the result of an asynchronous initialization of a persistent store.
+ The `PersistentStoreResult` can be treated as a boolean:
+ ```
+ try! CoreStore.addSQLiteStore(completion: { (result: PersistentStoreResult) -> Void in
+     if result {
+        // succeeded
+     }
+     else {
+        // failed
+     }
+ })
+ ```
+ or as an `enum`, where the resulting associated object can also be inspected:
+ ```
+ try! CoreStore.addSQLiteStore(completion: { (result: PersistentStoreResult) -> Void in
+     switch result {
+     case .Success(let persistentStore):
+        // persistentStore is the related NSPersistentStore instance
+     case .Failure(let error):
+        // error is the NSError instance for the failure
+     }
+ })
+ ```
+ */
+public enum PersistentStoreResult {
+    
+    /**
+     `PersistentStoreResult.Success` indicates that the persistent store process succeeded. The associated object for this `enum` value is the related `NSPersistentStore` instance.
+     */
+    case Success(NSPersistentStore)
+    
+    /**
+     `PersistentStoreResult.Failure` indicates that the persistent store process failed. The associated object for this value is the related `NSError` instance.
+     */
+    case Failure(NSError)
+    
+    
+    // MARK: Internal
+    
+    internal init(_ store: NSPersistentStore) {
+        
+        self = .Success(store)
+    }
+    
+    internal init(_ error: NSError) {
+        
+        self = .Failure(error)
+    }
+    
+    internal init(_ errorCode: CoreStoreErrorCode) {
+        
+        self.init(errorCode, userInfo: nil)
+    }
+    
+    internal init(_ errorCode: CoreStoreErrorCode, userInfo: [NSObject: AnyObject]?) {
+        
+        self.init(NSError(coreStoreErrorCode: errorCode, userInfo: userInfo))
+    }
+}
+
+
+// MARK: - PersistentStoreResult: BooleanType
+
+extension PersistentStoreResult: BooleanType {
+    
+    public var boolValue: Bool {
+        
+        switch self {
+            
+        case .Success: return true
+        case .Failure: return false
+        }
+    }
+}