mirror of
https://github.com/zhigang1992/RestKit.git
synced 2026-04-01 22:42:51 +08:00
66 lines
2.8 KiB
Objective-C
66 lines
2.8 KiB
Objective-C
//
|
|
// RKFetchRequestMappingCache.m
|
|
// RestKit
|
|
//
|
|
// Created by Jeff Arena on 1/24/12.
|
|
// Copyright (c) 2009-2012 RestKit. All rights reserved.
|
|
//
|
|
|
|
#import "RKFetchRequestManagedObjectCache.h"
|
|
#import "NSManagedObject+ActiveRecord.h"
|
|
#import "NSEntityDescription+RKAdditions.h"
|
|
#import "RKLog.h"
|
|
#import "RKObjectPropertyInspector.h"
|
|
#import "RKObjectPropertyInspector+CoreData.h"
|
|
|
|
// Set Logging Component
|
|
#undef RKLogComponent
|
|
#define RKLogComponent lcl_cRestKitCoreData
|
|
|
|
@implementation RKFetchRequestManagedObjectCache
|
|
|
|
- (NSManagedObject *)findInstanceOfEntity:(NSEntityDescription *)entity
|
|
withPrimaryKeyAttribute:(NSString *)primaryKeyAttribute
|
|
value:(id)primaryKeyValue
|
|
inManagedObjectContext:(NSManagedObjectContext *)managedObjectContext
|
|
{
|
|
NSAssert(entity, @"Cannot find existing managed object without a target class");
|
|
NSAssert(primaryKeyAttribute, @"Cannot find existing managed object instance without mapping that defines a primaryKeyAttribute");
|
|
NSAssert(primaryKeyValue, @"Cannot find existing managed object by primary key without a value");
|
|
NSAssert(managedObjectContext, @"Cannot find existing managed object with a context");
|
|
|
|
id searchValue = primaryKeyValue;
|
|
Class type = [[RKObjectPropertyInspector sharedInspector] typeForProperty:primaryKeyAttribute ofEntity:entity];
|
|
if (type && ([type isSubclassOfClass:[NSString class]] && NO == [primaryKeyValue isKindOfClass:[NSString class]])) {
|
|
searchValue = [NSString stringWithFormat:@"%@", primaryKeyValue];
|
|
} else if (type && ([type isSubclassOfClass:[NSNumber class]] && NO == [primaryKeyValue isKindOfClass:[NSNumber class]])) {
|
|
if ([primaryKeyValue isKindOfClass:[NSString class]]) {
|
|
searchValue = [NSNumber numberWithDouble:[(NSString *)primaryKeyValue doubleValue]];
|
|
}
|
|
}
|
|
|
|
// Use cached predicate if primary key matches
|
|
NSPredicate *predicate = nil;
|
|
if ([entity.primaryKeyAttributeName isEqualToString:primaryKeyAttribute]) {
|
|
predicate = [entity predicateForPrimaryKeyAttributeWithValue:searchValue];
|
|
} else {
|
|
// Parse a predicate
|
|
predicate = [NSPredicate predicateWithFormat:@"%K = %@", primaryKeyAttribute, searchValue];
|
|
}
|
|
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
|
|
fetchRequest.entity = entity;
|
|
fetchRequest.fetchLimit = 1;
|
|
fetchRequest.predicate = predicate;
|
|
NSArray *objects = [NSManagedObject executeFetchRequest:fetchRequest inContext:managedObjectContext];
|
|
RKLogDebug(@"Found objects '%@' using fetchRequest '%@'", objects, fetchRequest);
|
|
[fetchRequest release];
|
|
|
|
NSManagedObject *object = nil;
|
|
if ([objects count] > 0) {
|
|
object = [objects objectAtIndex:0];
|
|
}
|
|
return object;
|
|
}
|
|
|
|
@end
|