Flatten file directories (fixes #159)

Sources/CSFrom.swift

@@ -0,0 +1,165 @@
+//
+//  CSFrom.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: - CSFrom
+
+/**
+ The `CSFrom` serves as the Objective-C bridging type for `From`.
+ 
+ - SeeAlso: `From`
+ */
+@objc
+public final class CSFrom: NSObject, CoreStoreObjectiveCType {
+    
+    /**
+     The associated `NSManagedObject` entity class
+     */
+    @objc
+    public var entityClass: AnyClass {
+        
+        return self.bridgeToSwift.entityClass
+    }
+    
+    /**
+     The `NSPersistentStore` configuration names to associate objects from.
+     May contain `NSString` instances to pertain to named configurations, or `NSNull` to pertain to the default configuration
+     */
+    @objc
+    public var configurations: [Any]? {
+        
+        return self.bridgeToSwift.configurations?.map {
+            
+            switch $0 {
+                
+            case nil: return NSNull()
+            case let string as NSString: return string
+            }
+        }
+    }
+    
+    /**
+     Initializes a `CSFrom` clause with the specified entity class.
+     ```
+     MyPersonEntity *people = [transaction fetchAllFrom:CSFromClass([MyPersonEntity class])];
+     ```
+     - parameter entityClass: the `NSManagedObject` class type to be created
+     */
+    @objc
+    public convenience init(entityClass: AnyClass) {
+        
+        self.init(From(entityClass))
+    }
+    
+    /**
+     Initializes a `CSFrom` clause with the specified configurations.
+     ```
+     MyPersonEntity *people = [transaction fetchAllFrom:
+        CSFromClass([MyPersonEntity class], @"Config1")];
+     ```
+     - parameter configuration: the `NSPersistentStore` configuration name to associate objects from. This parameter is required if multiple configurations contain the created `NSManagedObject`'s entity type. Set to `[NSNull null]` to use the default configuration.
+     */
+    @objc
+    public convenience init(entityClass: AnyClass, configuration: Any) {
+        
+        switch configuration {
+            
+        case let string as String:
+            self.init(From(entityClass, string))
+            
+        case is NSNull:
+            self.init(From(entityClass, nil))
+            
+        default:
+            CoreStore.abort("The configuration argument only accepts NSString and NSNull values")
+        }
+    }
+    
+    /**
+     Initializes a `CSFrom` clause with the specified configurations.
+     ```
+     MyPersonEntity *people = [transaction fetchAllFrom:
+        CSFromClass([MyPersonEntity class],
+                     @[[NSNull null], @"Config1"])];
+     ```
+     - parameter entity: the associated `NSManagedObject` entity class
+     - parameter configurations: an array of the `NSPersistentStore` configuration names to associate objects from. This parameter is required if multiple configurations contain the created `NSManagedObject`'s entity type. Set to `[NSNull null]` to use the default configuration.
+     */
+    @objc
+    public convenience init(entityClass: AnyClass, configurations: [Any]) {
+        
+        var arguments = [String?]()
+        for configuration in configurations {
+            
+            switch configuration {
+                
+            case let string as String:
+                arguments.append(string)
+                
+            case is NSNull:
+                arguments.append(nil)
+                
+            default:
+                CoreStore.abort("The configurations argument only accepts NSString and NSNull values")
+            }
+        }
+        self.init(From(entityClass, arguments))
+    }
+    
+    
+    // MARK: NSObject
+    
+    public override var description: String {
+        
+        return "(\(String(reflecting: type(of: self)))) \(self.bridgeToSwift.coreStoreDumpString)"
+    }
+    
+    
+    // MARK: CoreStoreObjectiveCType
+    
+    public let bridgeToSwift: From<NSManagedObject>
+    
+    public init<T: NSManagedObject>(_ swiftValue: From<T>) {
+        
+        self.bridgeToSwift = swiftValue.downcast()
+        super.init()
+    }
+}
+
+
+// MARK: - From
+
+extension From: CoreStoreSwiftType {
+    
+    // MARK: CoreStoreSwiftType
+    
+    public var bridgeToObjectiveC: CSFrom {
+        
+        return CSFrom(self)
+    }
+}