mirror of
https://github.com/zhigang1992/RestKit.git
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f3c0995d5e
* Removed RestKit from inheritance hierarchy * Mappings are implemented as concrete classes * Mapper is much more flexible & powerful * Much more robust error handling * Serialization is reimplemented as an object mapping operation * Added ability to serialize to JSON natively * Reworked Core Data integration * Simplified the codebase substantially
120 lines
4.0 KiB
Objective-C
120 lines
4.0 KiB
Objective-C
//
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// RKManagedObjectLoader.m
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// RestKit
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//
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// Created by Blake Watters on 2/13/11.
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// Copyright 2011 Two Toasters. All rights reserved.
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//
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#import "RKObjectManager.h"
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#import "RKManagedObjectLoader.h"
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#import "RKURL.h"
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#import "RKObjectMapper.h"
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#import "RKManagedObjectFactory.h"
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#import "RKManagedObjectThreadSafeInvocation.h"
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#import "../ObjectMapping/RKObjectLoader_Internals.h"
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#import "../Network/RKRequest_Internals.h"
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@implementation RKManagedObjectLoader
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- (id)init {
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self = [super init];
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if (self) {
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_managedObjectKeyPaths = [[NSMutableSet alloc] init];
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}
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return self;
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}
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- (void)dealloc {
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[_targetObjectID release];
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_targetObjectID = nil;
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[_managedObjectKeyPaths release];
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[super dealloc];
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}
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- (RKManagedObjectStore*)objectStore {
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return self.objectManager.objectStore;
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}
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#pragma mark - RKObjectMapperDelegate methods
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- (void)objectMapper:(RKObjectMapper*)objectMapper didMapFromObject:(id)sourceObject toObject:(id)destinationObject atKeyPath:(NSString*)keyPath usingMapping:(RKObjectMapping*)objectMapping {
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if ([destinationObject isKindOfClass:[NSManagedObject class]]) {
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[_managedObjectKeyPaths addObject:keyPath];
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}
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}
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#pragma mark - RKObjectLoader overrides
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// Overload the target object reader to return a thread-local copy of the target object
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- (id)targetObject {
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if ([NSThread isMainThread] == NO && _targetObjectID) {
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return [self.objectStore objectWithID:_targetObjectID];
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}
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return _targetObject;
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}
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- (void)setTargetObject:(NSObject*)targetObject {
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[_targetObject release];
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_targetObject = nil;
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_targetObject = [targetObject retain];
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[_targetObjectID release];
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_targetObjectID = nil;
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}
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- (void)prepareURLRequest {
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// TODO: Can we just do this if the object hasn't been saved already???
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// NOTE: There is an important sequencing issue here. You MUST save the
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// managed object context before retaining the objectID or you will run
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// into an error where the object context cannot be saved. We do this
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// right before send to avoid sequencing issues where the target object is
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// set before the managed object store.
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if (self.targetObject && [self.targetObject isKindOfClass:[NSManagedObject class]]) {
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[self.objectStore save];
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_targetObjectID = [[(NSManagedObject*)self.targetObject objectID] retain];
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}
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[super prepareURLRequest];
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}
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// NOTE: We are on the background thread here, be mindful of Core Data's threading needs
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- (void)processMappingResult:(RKObjectMappingResult*)result {
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if (_targetObjectID && self.targetObject && self.method == RKRequestMethodDELETE) {
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// TODO: Logging
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NSManagedObject* backgroundThreadObject = [self.objectStore objectWithID:_targetObjectID];
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[[self.objectStore managedObjectContext] deleteObject:backgroundThreadObject];
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}
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// If the response was successful, save the store...
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if ([self.response isSuccessful]) {
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// TODO: Logging or delegate notifications?
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[self.objectStore save];
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}
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// TODO: If unsuccessful and we saved the object, remove it from the store so that it is not orphaned
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NSDictionary* dictionary = [result asDictionary];
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NSMethodSignature* signature = [self methodSignatureForSelector:@selector(informDelegateOfObjectLoadWithResultDictionary:)];
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RKManagedObjectThreadSafeInvocation* invocation = [RKManagedObjectThreadSafeInvocation invocationWithMethodSignature:signature];
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[invocation setObjectStore:self.objectStore];
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[invocation setTarget:self];
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[invocation setSelector:@selector(informDelegateOfObjectLoadWithResultDictionary:)];
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[invocation setArgument:&dictionary atIndex:2];
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[invocation setManagedObjectKeyPaths:_managedObjectKeyPaths forArgument:2];
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[invocation invokeOnMainThread];
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}
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- (id<RKObjectFactory>)createObjectFactory {
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if (self.objectManager.objectStore) {
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return [RKManagedObjectFactory objectFactoryWithObjectStore:self.objectStore];
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}
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return nil;
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}
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@end
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