darling-cocotron/CoreData/NSManagedObjectID.m

#import <CoreData/NSEntityDescription.h>
#import <CoreData/NSManagedObjectID.h>
#import <CoreData/NSManagedObjectModel.h>
#import <CoreFoundation/CFUUID.h>
#import <Foundation/NSRaise.h>
#import <Foundation/NSString.h>
#import <Foundation/NSURL.h>

@implementation NSManagedObjectID

- initWithEntity: (NSEntityDescription *) entity {
    _entity = [entity retain];
    _isTemporaryID = YES;
    _storeIdentifier = nil;

    CFUUIDRef uuid = CFUUIDCreate(NULL);
    _referenceObject = (NSString *) CFUUIDCreateString(NULL, uuid);
    CFRelease(uuid);

    return self;
}

- (void) dealloc {
    [_entity release];
    [_storeIdentifier release];
    [_referenceObject release];
    [super dealloc];
}

/* NSManagedObjectID is hashed/equal by ptr value, they are uniqued per
   persistent store and should be the same instance for all references to the
   same underlying NSManagedObject
 */

- copyWithZone: (NSZone *) zone {
    return [self retain];
}

- (NSEntityDescription *) entity {
    return _entity;
}

- (NSString *) storeIdentifier {
    return _storeIdentifier;
}

- (BOOL) isTemporaryID {
    return _isTemporaryID;
}

- referenceObject {
    return _referenceObject;
}

- (NSURL *) URIRepresentation {
    NSString *path =
            [[_entity name] stringByAppendingPathComponent: _referenceObject];
    NSString *host = _isTemporaryID ? @"" : _storeIdentifier;

    return [[[NSURL alloc] initWithScheme: @"x-coredata" host: host
                                     path: path] autorelease];
}

- (NSPersistentStore *) persistentStore {
    return _persistentStore;
}

- (void) setStoreIdentifier: (NSString *) value {
    value = [value copy];
    [_storeIdentifier release];
    _storeIdentifier = value;
}

- (void) setReferenceObject: value {
    _isTemporaryID = NO;
    value = [value copy];
    [_referenceObject release];
    _referenceObject = value;
}

- (void) setPersistentStore: (NSPersistentStore *) store {
    _persistentStore = store;
}

- (NSString *) description {
    return [NSString stringWithFormat: @"<%@ %p temp=%d, ref=%@>", [self class],
                                       self, _isTemporaryID, _referenceObject];
}

@end