Merge branch 'develop' into corestore4_develop

# Conflicts:
#	CoreStore.podspec
#	Sources/CoreStoreImportableAttributeType.swift
#	Sources/CoreStoreQueryableAttributeType.swift
#	Sources/Info.plist
#	Sources/NSManagedObjectModel+Setup.swift

Sources/CSDataStack+Transaction.swift

@@ -0,0 +1,157 @@
+//
+//  CSDataStack+Transaction.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: - CSDataStack
+
+public extension CSDataStack {
+    
+    /**
+     Begins a transaction asynchronously where `NSManagedObject` creates, updates, and deletes can be made.
+     
+     - parameter closure: the block where creates, updates, and deletes can be made to the transaction. Transaction blocks are executed serially in a background queue, and all changes are made from a concurrent `NSManagedObjectContext`.
+     */
+    @objc
+    public func beginAsynchronous(_ closure: @escaping (_ transaction: CSAsynchronousDataTransaction) -> Void) {
+        
+        self.bridgeToSwift.perform(
+            asynchronous: { (transaction) in
+                
+                let csTransaction = transaction.bridgeToObjectiveC
+                closure(csTransaction)
+                if !transaction.isCommitted && transaction.hasChanges {
+                    
+                    CoreStore.log(
+                        .warning,
+                        message: "The closure for the \(cs_typeName(csTransaction)) completed without being committed. All changes made within the transaction were discarded."
+                    )
+                }
+                try transaction.cancel()
+            },
+            completion: { _ in }
+        )
+    }
+    
+    /**
+     Begins a transaction synchronously where `NSManagedObject` creates, updates, and deletes can be made.
+     
+     - parameter closure: the block where creates, updates, and deletes can be made to the transaction. Transaction blocks are executed serially in a background queue, and all changes are made from a concurrent `NSManagedObjectContext`.
+     - parameter error: the `CSError` pointer that indicates the reason in case of an failure
+     - returns: `YES` if the commit succeeded, `NO` if the commit failed. If `NO`, the `error` argument will hold error information.
+     */
+    @objc
+    public func beginSynchronous(_ closure: @escaping (_ transaction: CSSynchronousDataTransaction) -> Void, error: NSErrorPointer) -> Bool {
+        
+        return bridge(error) {
+            
+            do {
+                
+                try self.bridgeToSwift.perform(
+                    synchronous: { (transaction) in
+                        
+                        let csTransaction = transaction.bridgeToObjectiveC
+                        closure(csTransaction)
+                        if !transaction.isCommitted && transaction.hasChanges {
+                            
+                            CoreStore.log(
+                                .warning,
+                                message: "The closure for the \(cs_typeName(csTransaction)) completed without being committed. All changes made within the transaction were discarded."
+                            )
+                        }
+                        try transaction.cancel()
+                    }
+                )
+            }
+            catch CoreStoreError.userCancelled {
+                
+                return
+            }
+        }
+    }
+    
+    /**
+     Begins a child transaction where `NSManagedObject` creates, updates, and deletes can be made. This is useful for making temporary changes, such as partially filled forms.
+     
+     To support "undo" methods such as `-undo`, `-redo`, and `-rollback`, use the `-beginSafeWithSupportsUndo:` method passing `YES` to the argument. Without "undo" support, calling those methods will raise an exception.
+     - returns: a `CSUnsafeDataTransaction` instance where creates, updates, and deletes can be made.
+     */
+    @objc
+    public func beginUnsafe() -> CSUnsafeDataTransaction {
+        
+        return bridge {
+            
+            self.bridgeToSwift.beginUnsafe()
+        }
+    }
+    
+    /**
+     Begins a child transaction where `NSManagedObject` creates, updates, and deletes can be made. This is useful for making temporary changes, such as partially filled forms.
+     
+     - prameter supportsUndo: `-undo`, `-redo`, and `-rollback` methods are only available when this parameter is `YES`, otherwise those method will raise an exception. Note that turning on Undo support may heavily impact performance especially on iOS or watchOS where memory is limited.
+     - returns: a `CSUnsafeDataTransaction` instance where creates, updates, and deletes can be made.
+     */
+    @objc
+    public func beginUnsafeWithSupportsUndo(_ supportsUndo: Bool) -> CSUnsafeDataTransaction {
+        
+        return bridge {
+            
+            self.bridgeToSwift.beginUnsafe(supportsUndo: supportsUndo)
+        }
+    }
+    
+    /**
+     Refreshes all registered objects `NSManagedObject`s in the `DataStack`.
+     */
+    @objc
+    public func refreshAndMergeAllObjects() {
+        
+        self.bridgeToSwift.refreshAndMergeAllObjects()
+    }
+    
+    
+    // MARK: Deprecated
+    
+    /**
+     Begins a transaction synchronously where `NSManagedObject` creates, updates, and deletes can be made.
+     
+     - parameter closure: the block where creates, updates, and deletes can be made to the transaction. Transaction blocks are executed serially in a background queue, and all changes are made from a concurrent `NSManagedObjectContext`.
+     - returns: a `CSSaveResult` value indicating success or failure, or `nil` if the transaction was not comitted synchronously
+     */
+    @available(*, deprecated, message: "Use the new -[CSDataStack beginSynchronous:error:] API that reports failure using an error instance.")
+    @objc
+    @discardableResult
+    public func beginSynchronous(_ closure: @escaping (_ transaction: CSSynchronousDataTransaction) -> Void) -> CSSaveResult? {
+        
+        return bridge {
+            
+            self.bridgeToSwift.beginSynchronous { (transaction) in
+                
+                closure(transaction.bridgeToObjectiveC)
+            }
+        }
+    }
+}