mirror of
https://github.com/zhigang1992/RestKit.git
synced 2026-04-01 22:42:51 +08:00
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
81 lines
3.0 KiB
Objective-C
81 lines
3.0 KiB
Objective-C
//
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// RKManagedObjectFactory.m
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// RestKit
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//
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// Created by Blake Watters on 5/10/11.
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// Copyright 2011 Two Toasters. All rights reserved.
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//
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#import "RKManagedObjectFactory.h"
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#import "RKManagedObjectMapping.h"
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@implementation RKManagedObjectFactory
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- (id)initWithObjectStore:(RKManagedObjectStore*)objectStore {
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NSAssert(objectStore, @"Object store cannot be nil");
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self = [self init];
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if (self) {
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_objectStore = [objectStore retain];
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}
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return self;
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}
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+ (id)objectFactoryWithObjectStore:(RKManagedObjectStore*)objectStore {
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return [[[self alloc] initWithObjectStore:objectStore] autorelease];
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}
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- (void)dealloc {
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[_objectStore release];
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[super dealloc];
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}
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- (id)objectWithMapping:(RKObjectMapping*)mapping andData:(id)mappableData {
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NSAssert(mapping, @"Mapping cannot be nil");
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NSAssert(mappableData, @"Mappable data cannot be nil");
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NSAssert(_objectStore, @"Object store cannot be nil");
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id object = nil;
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id primaryKeyValue = nil;
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NSString* primaryKeyAttribute;
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if ([mapping isKindOfClass:[RKManagedObjectMapping class]]) {
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NSEntityDescription* entity = [(RKManagedObjectMapping*)mapping entity];
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RKObjectAttributeMapping* primaryKeyAttributeMapping = nil;
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primaryKeyAttribute = [(RKManagedObjectMapping*)mapping primaryKeyAttribute];
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if (primaryKeyAttribute) {
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// If a primary key has been set on the object mapping, find the attribute mapping
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// so that we can extract any existing primary key from the mappable data
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for (RKObjectAttributeMapping* attributeMapping in mapping.attributeMappings) {
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if ([attributeMapping.destinationKeyPath isEqualToString:primaryKeyAttribute]) {
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primaryKeyAttributeMapping = attributeMapping;
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break;
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}
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}
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// Get the primary key value out of the mappable data (if any)
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NSString* keyPathForPrimaryKeyElement = primaryKeyAttributeMapping.sourceKeyPath;
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if (keyPathForPrimaryKeyElement) {
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primaryKeyValue = [mappableData valueForKeyPath:keyPathForPrimaryKeyElement];
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}
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}
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// If we have found the primary key attribute & value, try to find an existing instance to update
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if (primaryKeyAttribute && primaryKeyValue) {
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object = [_objectStore findOrCreateInstanceOfEntity:entity withPrimaryKeyAttribute:primaryKeyAttribute andValue:primaryKeyValue];
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NSAssert2(object, @"Failed creation of managed object with entity '%@' and primary key value '%@'", entity.name, primaryKeyValue);
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} else {
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object = [[[NSManagedObject alloc] initWithEntity:entity
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insertIntoManagedObjectContext:_objectStore.managedObjectContext] autorelease];
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}
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return object;
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}
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return [[mapping.objectClass new] autorelease];
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}
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@end
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