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99 lines
3.5 KiB
Objective-C
99 lines
3.5 KiB
Objective-C
//
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// RKInMemoryManagedObjectCache.m
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// RestKit
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//
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// Created by Jeff Arena on 1/24/12.
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// Copyright (c) 2009-2012 RestKit. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#import "RKInMemoryManagedObjectCache.h"
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#import "RKEntityCache.h"
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#import "RKLog.h"
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#import "RKEntityByAttributeCache.h"
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// Set Logging Component
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#undef RKLogComponent
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#define RKLogComponent RKlcl_cRestKitCoreData
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@interface RKInMemoryManagedObjectCache ()
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@property (nonatomic, strong, readwrite) RKEntityCache *entityCache;
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@end
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@implementation RKInMemoryManagedObjectCache
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- (id)initWithManagedObjectContext:(NSManagedObjectContext *)managedObjectContext
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{
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self = [super init];
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if (self) {
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self.entityCache = [[RKEntityCache alloc] initWithManagedObjectContext:managedObjectContext];
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}
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return self;
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}
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- (id)init
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{
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@throw [NSException exceptionWithName:NSInternalInconsistencyException
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reason:[NSString stringWithFormat:@"%@ Failed to call designated initializer. Invoke initWithManagedObjectContext: instead.",
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NSStringFromClass([self class])]
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userInfo:nil];
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}
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- (NSSet *)managedObjectsWithEntity:(NSEntityDescription *)entity
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attributeValues:(NSDictionary *)attributeValues
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inManagedObjectContext:(NSManagedObjectContext *)managedObjectContext
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{
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NSParameterAssert(entity);
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NSParameterAssert(attributeValues);
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NSParameterAssert(managedObjectContext);
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NSArray *attributes = [attributeValues allKeys];
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if (! [self.entityCache isEntity:entity cachedByAttributes:attributes]) {
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RKLogInfo(@"Caching instances of Entity '%@' by attributes '%@'", entity.name, [attributes componentsJoinedByString:@", "]);
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[self.entityCache cacheObjectsForEntity:entity byAttributes:attributes];
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RKEntityByAttributeCache *attributeCache = [self.entityCache attributeCacheForEntity:entity attributes:attributes];
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RKLogTrace(@"Cached %ld objects", (long)[attributeCache count]);
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}
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return [self.entityCache objectsForEntity:entity withAttributeValues:attributeValues inContext:managedObjectContext];
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}
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- (void)didFetchObject:(NSManagedObject *)object
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{
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[self.entityCache addObject:object];
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}
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- (void)didCreateObject:(NSManagedObject *)object
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{
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/**
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NOTE: When an object with a temporary ID is added to the cache, we obtain a permanent ID to avoid the potential for duplicated objects being created due to concurrenct access
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*/
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if ([[object objectID] isTemporaryID]) {
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NSError *error = nil;
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RKLogTrace(@"Obtaining permanent managed object ID for temporary managed object: %@", object);
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if (! [[object managedObjectContext] obtainPermanentIDsForObjects:@[ object ] error:&error]) {
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RKLogError(@"Failed to obtain permanent managed object ID: %@", error);
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}
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}
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[self.entityCache addObject:object];
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}
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- (void)didDeleteObject:(NSManagedObject *)object
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{
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[self.entityCache removeObject:object];
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}
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@end
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