Merge remote-tracking branch 'origin/Core-Data-Purge-And-Update'

* origin/Core-Data-Purge-And-Update:
  - check for an existing key before trying to find an existing managed object
  - initial checkin for core data update/purge support

Author: aryaxt

OCMapper.xcodeproj/project.pbxproj

@@ -502,7 +502,7 @@
 		15B554A2171B7B3B0058E159 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0450;
+				LastUpgradeCheck = 0500;
 				ORGANIZATIONNAME = "Aryan Ghassemi";
 			};
 			buildConfigurationList = 15B554A5171B7B3B0058E159 /* Build configuration list for PBXProject "OCMapper" */;
@@ -669,6 +669,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				IPHONEOS_DEPLOYMENT_TARGET = 6.0;
+				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};

OCMapper/Models/CDUser.h

@@ -31,6 +31,7 @@
 
 @interface CDUser : NSManagedObject
 
+@property (nonatomic, strong) NSNumber *userId;
 @property (nonatomic, strong) NSString *firstName;
 @property (nonatomic, strong) NSString *lastName;
 @property (nonatomic, strong) NSDate *dateOfBirth;

OCMapper/Models/CDUser.m

@@ -28,6 +28,7 @@
 #import "CDUser.h"
 
 @implementation CDUser
+@dynamic userId;
 @dynamic firstName;
 @dynamic lastName;
 @dynamic age;

OCMapper/Models/Core Data/CDAddress.h

@@ -29,6 +29,7 @@
 
 @interface CDAddress : NSManagedObject
 
+@property (nonatomic, strong) NSNumber *addressId;
 @property (nonatomic, strong) NSString *city;
 @property (nonatomic, strong) NSString *country;
 

OCMapper/Models/Core Data/CDAddress.m

@@ -28,6 +28,7 @@
 #import "CDAddress.h"
 
 @implementation CDAddress
+@dynamic addressId;
 @dynamic city;
 @dynamic country;
 

OCMapper/Models/CoreDataManager.m

@@ -193,7 +193,7 @@ - (NSPersistentStoreCoordinator *)persistentStoreCoordinator
 
     NSError *error = nil;
     _persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
-    if (![_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:options error:&error])
+    if (![_persistentStoreCoordinator addPersistentStoreWithType:NSInMemoryStoreType configuration:nil URL:storeURL options:options error:&error])
 	{
         /*
          Replace this implementation with code to handle the error appropriately.

OCMapper/Models/OCMapper.xcdatamodeld/OCMapper.xcdatamodel/contents

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
 <model userDefinedModelVersionIdentifier="" type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="3400" systemVersion="13A603" minimumToolsVersion="Xcode 4.3" macOSVersion="Automatic" iOSVersion="Automatic">
     <entity name="CDAddress" representedClassName="CDAddress" syncable="YES">
+        <attribute name="addressId" optional="YES" attributeType="Integer 32" defaultValueString="0" syncable="YES"/>
         <attribute name="city" optional="YES" attributeType="String" syncable="YES"/>
         <attribute name="country" optional="YES" attributeType="String" syncable="YES"/>
         <relationship name="user" optional="YES" minCount="1" maxCount="1" deletionRule="Nullify" destinationEntity="CDUser" inverseName="address" inverseEntity="CDUser" syncable="YES"/>
@@ -18,13 +19,14 @@
         <attribute name="dateOfBirth" optional="YES" attributeType="Date" syncable="YES"/>
         <attribute name="firstName" optional="YES" attributeType="String" syncable="YES"/>
         <attribute name="lastName" optional="YES" attributeType="String" syncable="YES"/>
+        <attribute name="userId" optional="YES" attributeType="Integer 32" defaultValueString="0" syncable="YES"/>
         <relationship name="address" optional="YES" minCount="1" maxCount="1" deletionRule="Nullify" destinationEntity="CDAddress" inverseName="user" inverseEntity="CDAddress" syncable="YES"/>
         <relationship name="posts" optional="YES" toMany="YES" deletionRule="Nullify" destinationEntity="CDPost" inverseName="user" inverseEntity="CDPost" syncable="YES"/>
     </entity>
     <elements>
         <element name="CDAddress" positionX="0" positionY="0" width="0" height="0"/>
         <element name="CDPost" positionX="0" positionY="0" width="0" height="0"/>
-        <element name="CDUser" positionX="0" positionY="0" width="0" height="0"/>
         <element name="CDSpecialUser" positionX="0" positionY="0" width="0" height="0"/>
+        <element name="CDUser" positionX="0" positionY="0" width="0" height="0"/>
     </elements>
 </model>

OCMapper/Source/Instance Provider/InstanceProvider.h

@@ -29,8 +29,9 @@
 
 @protocol InstanceProvider <NSObject>
 
-- (id)emptyInstanceFromClass:(Class)class;
-- (id)emptyInstanceOfCollectionObject;
+- (id)emptyInstanceForClass:(Class)class;
+- (id)emptyCollectionInstance;
+- (id)upsertObject:(NSObject *)object error:(NSError **)error;
 - (NSString *)propertyNameForObject:(NSObject *)object byCaseInsensitivePropertyName:(NSString *)caseInsensitivePropertyName;
 
 @end

OCMapper/Source/Instance Provider/ManagedObjectInstanceProvider.h

@@ -29,10 +29,14 @@
 #import <CoreData/CoreData.h>
 #import "InstanceProvider.h"
 
-@interface ManagedObjectInstanceProvider : NSObject <InstanceProvider>
+typedef enum {
+	UpsertModeUpdateExistingObject,
+	UpsertModePurgeExistingObject
+}UpsertMode;
 
-@property (nonatomic, strong) NSManagedObjectContext *managedObjectContext;
+@interface ManagedObjectInstanceProvider : NSObject <InstanceProvider>
 
-- (id)initWithManagedObjectContext:(NSManagedObjectContext *)managedObjectContext;
+- (id)initWithManagedObjectContext:(NSManagedObjectContext *)aManagedObjectContext;
+- (void)setUniqueKeys:(NSArray *)keys forClass:(Class)class withUpsertMode:(UpsertMode)upsertMode;
 
 @end

OCMapper/Source/Instance Provider/ManagedObjectInstanceProvider.m

@@ -27,8 +27,19 @@
 
 #import "ManagedObjectInstanceProvider.h"
 
+@interface UpsertInfo : NSObject
+@property (nonatomic, strong) NSArray *keys;
+@property (nonatomic, assign) UpsertMode upsertMode;
+@end
+@implementation UpsertInfo
+@end
+
+@interface ManagedObjectInstanceProvider()
+@property (nonatomic, strong) NSManagedObjectContext *managedObjectContext;
+@property (nonatomic, strong) NSMutableDictionary *uniqueKeysDictionary;
+@end
+
 @implementation ManagedObjectInstanceProvider
-@synthesize managedObjectContext;
 
 #pragma mark - Initialization -
 
@@ -37,24 +48,129 @@ - (id)initWithManagedObjectContext:(NSManagedObjectContext *)aManagedObjectConte
 	if (self = [super init])
 	{
 		self.managedObjectContext = aManagedObjectContext;
+		self.uniqueKeysDictionary = [NSMutableDictionary dictionary];
 	}
 
 	return self;
 }
 
+- (id)init
+{
+	@throw ([NSException exceptionWithName:@"InvalidInitializer"
+									reason:@"Use initWithManagedObjectContext to initialize this provider"
+								  userInfo:nil]);
+}
+
+#pragma mark - Public Methods -
+
+- (void)setUniqueKeys:(NSArray *)keys forClass:(Class)class withUpsertMode:(UpsertMode)upsertMode
+{
+	for (id key in keys)
+	{
+		if (![key isKindOfClass:[NSString class]])
+			@throw ([NSException exceptionWithName:@"InvalidArgumentException" reason:@"Method setUniqueKeys takes string only" userInfo:nil]);
+	}
+	
+	UpsertInfo *upsertInfo = [[UpsertInfo alloc] init];
+	upsertInfo.keys = keys;
+	upsertInfo.upsertMode = upsertMode;
+	
+	[self.uniqueKeysDictionary setObject:upsertInfo forKey:NSStringFromClass(class)];
+}
+
 #pragma mark - InstanceProvider Methods -
 
-- (id)emptyInstanceFromClass:(Class)class
+- (id)emptyInstanceForClass:(Class)class
 {
 	NSEntityDescription *entity = [NSEntityDescription entityForName:NSStringFromClass(class) inManagedObjectContext:self.managedObjectContext];
 	return (entity) ? [[NSManagedObject alloc] initWithEntity:entity insertIntoManagedObjectContext:self.managedObjectContext] : nil;
 }
 
-- (id)emptyInstanceOfCollectionObject
+- (id)emptyCollectionInstance
 {
 	return [NSMutableSet set];
 }
 
+- (id)upsertObject:(NSManagedObject *)object error:(NSError **)error
+{
+	UpsertInfo *upsertInfo = [self.uniqueKeysDictionary objectForKey:NSStringFromClass([object class])];
+	
+	if (!upsertInfo || !upsertInfo.keys.count)
+		return object;
+	
+	NSMutableArray *predicates = [NSMutableArray array];
+	[predicates addObject:[NSPredicate predicateWithFormat:@"SELF != %@", object]];
+	
+	for (int i=0 ; i<upsertInfo.keys.count ; i++)
+	{
+		NSString *key = [upsertInfo.keys objectAtIndex:i];
+		id value = [object valueForKey:key];
+		
+		if (key && value)
+		{
+			NSPredicate *predicate = [NSPredicate predicateWithFormat:@"%K == %@", key, value];
+			[predicates addObject:predicate];
+		}
+		else
+		{
+			*error = [NSError errorWithDomain:[NSString stringWithFormat:@"Value for property '%@' is null. Keys should not be nullable", key] code:0 userInfo:nil];
+			return object;
+		}
+	}
+	
+	NSPredicate *compundPredicate = [NSCompoundPredicate andPredicateWithSubpredicates:predicates];
+	NSFetchRequest *request = [[NSFetchRequest alloc] init];
+	[request setEntity:[NSEntityDescription entityForName:NSStringFromClass([object class]) inManagedObjectContext:self.managedObjectContext]];
+	[request setPredicate:compundPredicate];
+	
+	NSError *fetchError;
+	NSArray *existingObjects = [self.managedObjectContext executeFetchRequest:request error:&fetchError];
+	
+	if (fetchError)
+	{
+		*error = fetchError;
+		return object;
+	}
+	else
+	{
+		if (existingObjects.count == 0)
+		{
+			return object;
+		}
+		else if (existingObjects.count == 1)
+		{
+			if (upsertInfo.upsertMode == UpsertModeUpdateExistingObject)
+			{
+				NSManagedObject *existingObject = [existingObjects firstObject];
+				
+				for (NSAttributeDescription *attributeDescription in existingObject.entity.properties)
+				{
+					[existingObject setValue:[object valueForKey:attributeDescription.name] forKey:attributeDescription.name];
+				}
+				
+				[self.managedObjectContext deleteObject:object];
+				return existingObject;
+			}
+			else if (upsertInfo.upsertMode == UpsertModePurgeExistingObject)
+			{
+				NSManagedObject *existingObject = [existingObjects firstObject];
+				[self.managedObjectContext deleteObject:existingObject];
+				return object;
+			}
+			else
+			{
+				*error = [NSError errorWithDomain:[NSString stringWithFormat:@"Invalid upsertMode for class (%@)", NSStringFromClass([object class])] code:0 userInfo:nil];
+				return object;
+			}
+		}
+		else
+		{
+			*error = [NSError errorWithDomain:@"Multiple instances were found based on given key(s)" code:0 userInfo:nil];
+			return object;
+		}
+	}
+}
+
 - (NSString *)propertyNameForObject:(NSManagedObject *)object byCaseInsensitivePropertyName:(NSString *)caseInsensitivePropertyName
 {
 	for (NSAttributeDescription *attributeDescription in object.entity.properties)

OCMapper/Source/Instance Provider/ObjectInstanceProvider.m

@@ -31,16 +31,24 @@ @implementation ObjectInstanceProvider
 
 #pragma mark - InstanceProvider Methods -
 
-- (id)emptyInstanceFromClass:(Class)class
+- (id)emptyInstanceForClass:(Class)class
 {
 	return [[class alloc] init];
 }
 
-- (id)emptyInstanceOfCollectionObject
+- (id)emptyCollectionInstance
 {
 	return [NSMutableArray array];
 }
 
+- (id)upsertObject:(NSObject *)object error:(NSError **)error;
+{
+	// Object not stored anywhere and therefore no need to upsert
+	// This is specifically made for NSManagedObjects used by ManagedObjectInstanceProvider
+	
+	return object;
+}
+
 - (NSString *)propertyNameForObject:(NSObject *)object byCaseInsensitivePropertyName:(NSString *)caseInsensitivePropertyName
 {
 	NSString *result = nil;

OCMapper/Source/ObjectMapper.m

@@ -44,11 +44,6 @@ @interface ObjectMapper()
 @end
 
 @implementation ObjectMapper
-@synthesize defaultDateFormatter;
-@synthesize commonDateFormaters;
-@synthesize instanceProvider;
-@synthesize mappingProvider;
-@synthesize loggingProvider;
 
 #pragma mark - initialization -
 
@@ -78,10 +73,10 @@ - (id)init
 
 - (id)objectFromSource:(id)source toInstanceOfClass:(Class)class
 {
-	if (!mappingProvider)
+	if (!_mappingProvider)
 		@throw ([NSException exceptionWithName:@"MissingMappingProvider" reason:@"Mapping provider is not set" userInfo:nil]);
 
-	if (!instanceProvider)
+	if (!_instanceProvider)
 		@throw ([NSException exceptionWithName:@"MissingInstanceProvider" reason:@"Instance provider is not set" userInfo:nil]);
 
 	if ([source isKindOfClass:[NSDictionary class]])
@@ -244,7 +239,7 @@ - (id)processDictionary:(NSDictionary *)source forClass:(Class)class
 {
 	NSDictionary *normalizedSource = [self normalizedDictionaryFromDictionary:source forClass:class];
 
-	id object = [self.instanceProvider emptyInstanceFromClass:class];
+	id object = [self.instanceProvider emptyInstanceForClass:class];
 
 	for (NSString *key in normalizedSource)
 	{
@@ -317,12 +312,21 @@ - (id)processDictionary:(NSDictionary *)source forClass:(Class)class
 		}
 	}
 
+	NSError *error;
+	object = [self.instanceProvider upsertObject:object error:&error];
+	
+	if (error)
+		ELog(@"Attempt to update existing instance failed with error '%@' for class (%@) and object %@",
+			 error.localizedDescription,
+			 NSStringFromClass(class),
+			 object);
+	
 	return object;
 }
 
 - (id)processArray:(NSArray *)value forClass:(Class)class
 {
-	id collection = [self.instanceProvider emptyInstanceOfCollectionObject];
+	id collection = [self.instanceProvider emptyCollectionInstance];
 
 	for (id objectInArray in value)
 	{
@@ -409,36 +413,36 @@ - (NSDate *)dateFromString:(NSString *)string forProperty:(NSString *)property a
 
 - (NSMutableArray *)commonDateFormaters
 {
-	if (!commonDateFormaters)
+	if (!_commonDateFormaters)
 	{
-		commonDateFormaters = [NSMutableArray array];
+		_commonDateFormaters = [NSMutableArray array];
 
 		NSDateFormatter *formatter1 = [[NSDateFormatter alloc] init];
 		[formatter1 setDateFormat:@"yyyy-MM-dd"];
-		[commonDateFormaters addObject:formatter1];
+		[_commonDateFormaters addObject:formatter1];
 
 		NSDateFormatter *formatter2 = [[NSDateFormatter alloc] init];
 		[formatter2 setDateFormat:@"MM/dd/yyyy"];
-		[commonDateFormaters addObject:formatter2];
+		[_commonDateFormaters addObject:formatter2];
 
 		NSDateFormatter *formatter3 = [[NSDateFormatter alloc] init];
 		[formatter3 setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSSSSSSZ"];
-		[commonDateFormaters addObject:formatter3];
+		[_commonDateFormaters addObject:formatter3];
 
 		NSDateFormatter *formatter4 = [[NSDateFormatter alloc] init];
 		[formatter4 setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
-		[commonDateFormaters addObject:formatter4];
+		[_commonDateFormaters addObject:formatter4];
 
 		NSDateFormatter *formatter5 = [[NSDateFormatter alloc] init];
 		[formatter5 setDateFormat:@"MM/dd/yyyy HH:mm:ss aaa"];
-		[commonDateFormaters addObject:formatter5];
+		[_commonDateFormaters addObject:formatter5];
 
 		NSDateFormatter *formatter6 = [[NSDateFormatter alloc] init];
 		[formatter6 setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss'Z'"];
-		[commonDateFormaters addObject:formatter6];
+		[_commonDateFormaters addObject:formatter6];
 	}
 
-	return commonDateFormaters;
+	return _commonDateFormaters;
 }
 
 - (NSString *)typeForProperty:(NSString *)property andClass:(Class)class