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RLMRealm.mm
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////////////////////////////////////////////////////////////////////////////
//
// Copyright 2014 Realm Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////
#import "RLMRealm_Private.hpp"
#import "RLMAnalytics.hpp"
#import "RLMAsyncTask_Private.h"
#import "RLMArray_Private.hpp"
#import "RLMDictionary_Private.hpp"
#import "RLMError_Private.hpp"
#import "RLMLogger.h"
#import "RLMMigration_Private.h"
#import "RLMObject_Private.h"
#import "RLMObject_Private.hpp"
#import "RLMObjectSchema_Private.hpp"
#import "RLMObjectStore.h"
#import "RLMObservation.hpp"
#import "RLMProperty.h"
#import "RLMProperty_Private.h"
#import "RLMQueryUtil.hpp"
#import "RLMRealmConfiguration_Private.hpp"
#import "RLMRealmUtil.hpp"
#import "RLMScheduler.h"
#import "RLMSchema_Private.hpp"
#import "RLMSyncConfiguration.h"
#import "RLMSyncConfiguration_Private.hpp"
#import "RLMSet_Private.hpp"
#import "RLMThreadSafeReference_Private.hpp"
#import "RLMUpdateChecker.hpp"
#import "RLMUtil.hpp"
#import <realm/disable_sync_to_disk.hpp>
#import <realm/object-store/impl/realm_coordinator.hpp>
#import <realm/object-store/object_store.hpp>
#import <realm/object-store/schema.hpp>
#import <realm/object-store/shared_realm.hpp>
#import <realm/object-store/util/scheduler.hpp>
#import <realm/util/scope_exit.hpp>
#import <realm/version.hpp>
#if REALM_ENABLE_SYNC
#import "RLMSyncManager_Private.hpp"
#import "RLMSyncSession_Private.hpp"
#import "RLMSyncUtil_Private.hpp"
#import "RLMSyncSubscription_Private.hpp"
#import <realm/object-store/sync/sync_session.hpp>
#endif
using namespace realm;
using util::File;
@interface RLMRealmNotificationToken : RLMNotificationToken
@property (nonatomic, strong) RLMRealm *realm;
@property (nonatomic, copy) RLMNotificationBlock block;
@end
@interface RLMRealm ()
@property (nonatomic, strong) NSHashTable<RLMRealmNotificationToken *> *notificationHandlers;
- (void)sendNotifications:(RLMNotification)notification;
@end
void RLMDisableSyncToDisk() {
realm::disable_sync_to_disk();
}
static std::atomic<bool> s_set_skip_backup_attribute{true};
void RLMSetSkipBackupAttribute(bool value) {
s_set_skip_backup_attribute = value;
}
static void RLMAddSkipBackupAttributeToItemAtPath(std::string_view path) {
[[NSURL fileURLWithPath:@(path.data())] setResourceValue:@YES forKey:NSURLIsExcludedFromBackupKey error:nil];
}
void RLMWaitForRealmToClose(NSString *path) {
NSString *lockfilePath = [path stringByAppendingString:@".lock"];
if (![NSFileManager.defaultManager fileExistsAtPath:lockfilePath]) {
return;
}
File lockfile(lockfilePath.UTF8String, File::mode_Update);
lockfile.set_fifo_path([path stringByAppendingString:@".management"].UTF8String, "lock.fifo");
while (!lockfile.try_rw_lock_exclusive()) {
sched_yield();
}
}
BOOL RLMIsRealmCachedAtPath(NSString *path) {
return RLMGetAnyCachedRealmForPath([path cStringUsingEncoding:NSUTF8StringEncoding]) != nil;
}
RLM_HIDDEN
@implementation RLMRealmNotificationToken
- (bool)invalidate {
if (_realm) {
[_realm verifyThread];
[_realm.notificationHandlers removeObject:self];
_realm = nil;
_block = nil;
return true;
}
return false;
}
- (void)suppressNextNotification {
// Temporarily replace the block with one which restores the old block
// rather than producing a notification.
// This briefly creates a retain cycle but it's fine because the block will
// be synchronously called shortly after this method is called. Unlike with
// collection notifications, this does not have to go through the object
// store or do fancy things to handle transaction coalescing because it's
// called synchronously by the obj-c code and not by the object store.
auto notificationBlock = _block;
_block = ^(RLMNotification, RLMRealm *) {
_block = notificationBlock;
};
}
- (void)dealloc {
if (_realm || _block) {
NSLog(@"RLMNotificationToken released without unregistering a notification. You must hold "
@"on to the RLMNotificationToken returned from addNotificationBlock and call "
@"-[RLMNotificationToken invalidate] when you no longer wish to receive RLMRealm notifications.");
}
}
@end
static bool shouldForciblyDisableEncryption() {
static bool disableEncryption = getenv("REALM_DISABLE_ENCRYPTION");
return disableEncryption;
}
NSData *RLMRealmValidatedEncryptionKey(NSData *key) {
if (shouldForciblyDisableEncryption()) {
return nil;
}
if (key && key.length != 64) {
@throw RLMException(@"Encryption key must be exactly 64 bytes long");
}
return key;
}
REALM_NOINLINE void RLMRealmTranslateException(NSError **error) {
try {
throw;
}
catch (FileAccessError const& ex) {
RLMSetErrorOrThrow(makeError(ex), error);
}
catch (Exception const& ex) {
RLMSetErrorOrThrow(makeError(ex), error);
}
catch (std::system_error const& ex) {
RLMSetErrorOrThrow(makeError(ex), error);
}
catch (std::exception const& ex) {
RLMSetErrorOrThrow(makeError(ex), error);
}
}
namespace {
// ARC tries to eliminate calls to autorelease when the value is then immediately
// returned, but this results in significantly different semantics between debug
// and release builds for RLMRealm, so force it to always autorelease.
// NEXT-MAJOR: we should switch to NS_RETURNS_RETAINED, which did not exist yet
// when we wrote this but is the correct thing.
id autorelease(__unsafe_unretained id value) {
// +1 __bridge_retained, -1 CFAutorelease
return value ? (__bridge id)CFAutorelease((__bridge_retained CFTypeRef)value) : nil;
}
RLMRealm *getCachedRealm(RLMRealmConfiguration *configuration, RLMScheduler *options) NS_RETURNS_RETAINED {
auto& config = configuration.configRef;
if (!configuration.cache && !configuration.dynamic) {
return nil;
}
RLMRealm *realm = RLMGetCachedRealm(configuration, options);
if (!realm) {
return nil;
}
auto const& oldConfig = realm->_realm->config();
if ((oldConfig.read_only() || oldConfig.immutable()) != configuration.readOnly) {
@throw RLMException(@"Realm at path '%@' already opened with different read permissions", configuration.fileURL.path);
}
if (oldConfig.in_memory != config.in_memory) {
@throw RLMException(@"Realm at path '%@' already opened with different inMemory settings", configuration.fileURL.path);
}
if (realm.dynamic != configuration.dynamic) {
@throw RLMException(@"Realm at path '%@' already opened with different dynamic settings", configuration.fileURL.path);
}
if (oldConfig.encryption_key != config.encryption_key) {
@throw RLMException(@"Realm at path '%@' already opened with different encryption key", configuration.fileURL.path);
}
return autorelease(realm);
}
bool copySeedFile(RLMRealmConfiguration *configuration, NSError **error) {
if (!configuration.seedFilePath) {
return false;
}
NSError *copyError;
bool didCopySeed = false;
@autoreleasepool {
DB::call_with_lock(configuration.path, [&](auto const&) {
didCopySeed = [[NSFileManager defaultManager] copyItemAtURL:configuration.seedFilePath
toURL:configuration.fileURL
error:©Error];
});
}
if (!didCopySeed && copyError && copyError.code != NSFileWriteFileExistsError) {
RLMSetErrorOrThrow(copyError, error);
return true;
}
return false;
}
} // anonymous namespace
@implementation RLMRealm {
std::mutex _collectionEnumeratorMutex;
NSHashTable<RLMFastEnumerator *> *_collectionEnumerators;
bool _sendingNotifications;
}
+ (void)initialize {
// In cases where we are not using a synced Realm, we initialise the default logger
// before opening any realm.
[RLMLogger class];
}
+ (void)runFirstCheckForConfiguration:(RLMRealmConfiguration *)configuration schema:(RLMSchema *)schema {
static bool initialized;
if (initialized) {
return;
}
initialized = true;
// Run Analytics on the very first any Realm open.
RLMSendAnalytics(configuration, schema);
RLMCheckForUpdates();
}
- (instancetype)initPrivate {
self = [super init];
return self;
}
- (BOOL)isEmpty {
return realm::ObjectStore::is_empty(self.group);
}
- (void)verifyThread {
try {
_realm->verify_thread();
}
catch (std::exception const& e) {
@throw RLMException(e);
}
}
- (BOOL)inWriteTransaction {
return _realm->is_in_transaction();
}
- (realm::Group &)group {
return _realm->read_group();
}
- (BOOL)autorefresh {
return _realm->auto_refresh();
}
- (void)setAutorefresh:(BOOL)autorefresh {
try {
_realm->set_auto_refresh(autorefresh);
}
catch (std::exception const& e) {
@throw RLMException(e);
}
}
+ (instancetype)defaultRealm {
return [RLMRealm realmWithConfiguration:[RLMRealmConfiguration rawDefaultConfiguration] error:nil];
}
+ (instancetype)defaultRealmForQueue:(dispatch_queue_t)queue {
return [RLMRealm realmWithConfiguration:[RLMRealmConfiguration rawDefaultConfiguration]
queue:queue error:nil];
}
+ (instancetype)realmWithURL:(NSURL *)fileURL {
RLMRealmConfiguration *configuration = [RLMRealmConfiguration defaultConfiguration];
configuration.fileURL = fileURL;
return [RLMRealm realmWithConfiguration:configuration error:nil];
}
+ (RLMAsyncOpenTask *)asyncOpenWithConfiguration:(RLMRealmConfiguration *)configuration
callbackQueue:(dispatch_queue_t)callbackQueue
callback:(RLMAsyncOpenRealmCallback)callback {
return [[RLMAsyncOpenTask alloc] initWithConfiguration:configuration
confinedTo:[RLMScheduler dispatchQueue:callbackQueue]
download:true completion:callback];
}
+ (instancetype)realmWithSharedRealm:(SharedRealm)sharedRealm
schema:(RLMSchema *)schema
dynamic:(bool)dynamic {
RLMRealm *realm = [[RLMRealm alloc] initPrivate];
realm->_realm = sharedRealm;
realm->_dynamic = dynamic;
realm->_schema = schema;
if (!dynamic) {
realm->_realm->set_schema_subset(schema.objectStoreCopy);
}
realm->_info = RLMSchemaInfo(realm);
return autorelease(realm);
}
+ (instancetype)realmWithSharedRealm:(std::shared_ptr<Realm>)osRealm
schema:(RLMSchema *)schema
dynamic:(bool)dynamic
freeze:(bool)freeze {
RLMRealm *realm = [[RLMRealm alloc] initPrivate];
realm->_realm = osRealm;
realm->_dynamic = dynamic;
if (dynamic) {
realm->_schema = schema ?: [RLMSchema dynamicSchemaFromObjectStoreSchema:osRealm->schema()];
}
else @autoreleasepool {
if (auto cachedRealm = RLMGetAnyCachedRealmForPath(osRealm->config().path)) {
realm->_realm->set_schema_subset(cachedRealm->_realm->schema());
realm->_schema = cachedRealm.schema;
realm->_info = cachedRealm->_info.clone(cachedRealm->_realm->schema(), realm);
}
else if (osRealm->is_frozen()) {
realm->_schema = schema ?: RLMSchema.sharedSchema;
realm->_realm->set_schema_subset(realm->_schema.objectStoreCopy);
}
else {
realm->_schema = schema ?: RLMSchema.sharedSchema;
try {
// No migration function: currently this is only used as part of
// client resets on sync Realms, so none is needed. If that
// changes, this'll need to as well.
realm->_realm->update_schema(realm->_schema.objectStoreCopy, osRealm->config().schema_version);
}
catch (...) {
RLMRealmTranslateException(nil);
REALM_COMPILER_HINT_UNREACHABLE();
}
}
}
if (realm->_info.begin() == realm->_info.end()) {
realm->_info = RLMSchemaInfo(realm);
}
if (freeze && !realm->_realm->is_frozen()) {
realm->_realm = realm->_realm->freeze();
}
return realm;
}
+ (instancetype)realmWithConfiguration:(RLMRealmConfiguration *)configuration error:(NSError **)error {
return autorelease([self realmWithConfiguration:configuration
confinedTo:RLMScheduler.currentRunLoop
error:error]);
}
+ (instancetype)realmWithConfiguration:(RLMRealmConfiguration *)configuration
queue:(dispatch_queue_t)queue
error:(NSError **)error {
return autorelease([self realmWithConfiguration:configuration
confinedTo:[RLMScheduler dispatchQueue:queue]
error:error]);
}
+ (instancetype)realmWithConfiguration:(RLMRealmConfiguration *)configuration
confinedTo:(RLMScheduler *)scheduler
error:(NSError **)error {
// First check if we already have a cached Realm for this config
if (auto realm = getCachedRealm(configuration, scheduler)) {
return realm;
}
if (copySeedFile(configuration, error)) {
return nil;
}
bool dynamic = configuration.dynamic;
bool cache = configuration.cache;
Realm::Config config = configuration.config;
RLMRealm *realm = [[self alloc] initPrivate];
realm->_dynamic = dynamic;
realm->_actor = scheduler.actor;
// protects the realm cache and accessors cache
static auto& initLock = *new RLMUnfairMutex;
std::lock_guard lock(initLock);
try {
config.scheduler = scheduler.osScheduler;
if (config.scheduler && !config.scheduler->is_on_thread()) {
throw RLMException(@"Realm opened from incorrect dispatch queue.");
}
realm->_realm = Realm::get_shared_realm(config);
}
catch (...) {
RLMRealmTranslateException(error);
return nil;
}
// if we have a cached realm on another thread we can skip a few steps and
// just grab its schema
@autoreleasepool {
// ensure that cachedRealm doesn't end up in this thread's autorelease pool
if (auto cachedRealm = RLMGetAnyCachedRealmForPath(config.path)) {
realm->_realm->set_schema_subset(cachedRealm->_realm->schema());
realm->_schema = cachedRealm.schema;
realm->_info = cachedRealm->_info.clone(cachedRealm->_realm->schema(), realm);
}
}
if (realm->_schema) { }
else if (dynamic) {
realm->_schema = [RLMSchema dynamicSchemaFromObjectStoreSchema:realm->_realm->schema()];
realm->_info = RLMSchemaInfo(realm);
}
else {
// set/align schema or perform migration if needed
RLMSchema *schema = configuration.customSchema ?: RLMSchema.sharedSchema;
MigrationFunction migrationFunction;
auto migrationBlock = configuration.migrationBlock;
if (migrationBlock && configuration.schemaVersion > 0) {
migrationFunction = [=](SharedRealm old_realm, SharedRealm realm, Schema& mutableSchema) {
RLMSchema *oldSchema = [RLMSchema dynamicSchemaFromObjectStoreSchema:old_realm->schema()];
RLMRealm *oldRealm = [RLMRealm realmWithSharedRealm:old_realm
schema:oldSchema
dynamic:true];
// The destination RLMRealm can't just use the schema from the
// SharedRealm because it doesn't have information about whether or
// not a class was defined in Swift, which effects how new objects
// are created
RLMRealm *newRealm = [RLMRealm realmWithSharedRealm:realm
schema:schema.copy
dynamic:true];
[[[RLMMigration alloc] initWithRealm:newRealm oldRealm:oldRealm schema:mutableSchema]
execute:migrationBlock objectClass:configuration.migrationObjectClass];
oldRealm->_realm = nullptr;
newRealm->_realm = nullptr;
};
}
try {
realm->_realm->update_schema(schema.objectStoreCopy, config.schema_version,
std::move(migrationFunction));
}
catch (...) {
RLMRealmTranslateException(error);
return nil;
}
realm->_schema = schema;
realm->_info = RLMSchemaInfo(realm);
RLMSchemaEnsureAccessorsCreated(realm.schema);
if (!configuration.readOnly) {
REALM_ASSERT(!realm->_realm->is_in_read_transaction());
if (s_set_skip_backup_attribute) {
RLMAddSkipBackupAttributeToItemAtPath(config.path + ".management");
RLMAddSkipBackupAttributeToItemAtPath(config.path + ".lock");
RLMAddSkipBackupAttributeToItemAtPath(config.path + ".note");
}
}
}
if (cache) {
RLMCacheRealm(configuration, scheduler, realm);
}
if (!configuration.readOnly) {
realm->_realm->m_binding_context = RLMCreateBindingContext(realm);
realm->_realm->m_binding_context->realm = realm->_realm;
}
// Run Analytics and Update checker, this will be run only the first any realm open
[self runFirstCheckForConfiguration:configuration schema:realm.schema];
return realm;
}
+ (void)resetRealmState {
RLMClearRealmCache();
realm::_impl::RealmCoordinator::clear_cache();
[RLMRealmConfiguration resetRealmConfigurationState];
}
- (void)verifyNotificationsAreSupported:(bool)isCollection {
[self verifyThread];
if (_realm->config().immutable()) {
@throw RLMException(@"Read-only Realms do not change and do not have change notifications.");
}
if (_realm->is_frozen()) {
@throw RLMException(@"Frozen Realms do not change and do not have change notifications.");
}
if (_realm->config().automatic_change_notifications && !_realm->can_deliver_notifications()) {
@throw RLMException(@"Can only add notification blocks from within runloops.");
}
}
- (RLMNotificationToken *)addNotificationBlock:(RLMNotificationBlock)block {
if (!block) {
@throw RLMException(@"The notification block should not be nil");
}
[self verifyNotificationsAreSupported:false];
_realm->read_group();
if (!_notificationHandlers) {
_notificationHandlers = [NSHashTable hashTableWithOptions:NSPointerFunctionsWeakMemory];
}
RLMRealmNotificationToken *token = [[RLMRealmNotificationToken alloc] init];
token.realm = self;
token.block = block;
[_notificationHandlers addObject:token];
return token;
}
- (void)sendNotifications:(RLMNotification)notification {
NSAssert(!_realm->config().immutable(), @"Read-only realms do not have notifications");
if (_sendingNotifications) {
return;
}
NSUInteger count = _notificationHandlers.count;
if (count == 0) {
return;
}
_sendingNotifications = true;
auto cleanup = realm::util::make_scope_exit([&]() noexcept {
_sendingNotifications = false;
});
// call this realm's notification blocks
if (count == 1) {
if (auto block = [_notificationHandlers.anyObject block]) {
block(notification, self);
}
}
else {
for (RLMRealmNotificationToken *token in _notificationHandlers.allObjects) {
if (auto block = token.block) {
block(notification, self);
}
}
}
}
- (RLMRealmConfiguration *)configuration {
RLMRealmConfiguration *configuration = [[RLMRealmConfiguration alloc] init];
configuration.configRef = _realm->config();
configuration.dynamic = _dynamic;
configuration.customSchema = _schema;
return configuration;
}
- (RLMRealmConfiguration *)configurationSharingSchema {
RLMRealmConfiguration *configuration = [[RLMRealmConfiguration alloc] init];
configuration.configRef = _realm->config();
configuration.dynamic = _dynamic;
[configuration setCustomSchemaWithoutCopying:_schema];
return configuration;
}
- (void)beginWriteTransaction {
[self beginWriteTransactionWithError:nil];
}
- (BOOL)beginWriteTransactionWithError:(NSError **)error {
try {
_realm->begin_transaction();
return YES;
}
catch (...) {
RLMRealmTranslateException(error);
return NO;
}
}
- (void)commitWriteTransaction {
[self commitWriteTransaction:nil];
}
- (BOOL)commitWriteTransaction:(NSError **)error {
return [self commitWriteTransactionWithoutNotifying:@[] error:error];
}
- (BOOL)commitWriteTransactionWithoutNotifying:(NSArray<RLMNotificationToken *> *)tokens error:(NSError **)error {
for (RLMNotificationToken *token in tokens) {
if (token.realm != self) {
@throw RLMException(@"Incorrect Realm: only notifications for the Realm being modified can be skipped.");
}
[token suppressNextNotification];
}
try {
_realm->commit_transaction();
return YES;
}
catch (...) {
RLMRealmTranslateException(error);
return NO;
}
}
- (void)transactionWithBlock:(__attribute__((noescape)) void(^)(void))block {
[self transactionWithBlock:block error:nil];
}
- (BOOL)transactionWithBlock:(__attribute__((noescape)) void(^)(void))block error:(NSError **)outError {
return [self transactionWithoutNotifying:@[] block:block error:outError];
}
- (void)transactionWithoutNotifying:(NSArray<RLMNotificationToken *> *)tokens block:(__attribute__((noescape)) void(^)(void))block {
[self transactionWithoutNotifying:tokens block:block error:nil];
}
- (BOOL)transactionWithoutNotifying:(NSArray<RLMNotificationToken *> *)tokens block:(__attribute__((noescape)) void(^)(void))block error:(NSError **)error {
[self beginWriteTransactionWithError:error];
block();
if (_realm->is_in_transaction()) {
return [self commitWriteTransactionWithoutNotifying:tokens error:error];
}
return YES;
}
- (void)cancelWriteTransaction {
try {
_realm->cancel_transaction();
}
catch (std::exception &ex) {
@throw RLMException(ex);
}
}
- (BOOL)isPerformingAsynchronousWriteOperations {
return _realm->is_in_async_transaction();
}
- (RLMAsyncTransactionId)beginAsyncWriteTransaction:(void(^)())block {
try {
return _realm->async_begin_transaction(block);
}
catch (std::exception &ex) {
@throw RLMException(ex);
}
}
- (RLMAsyncTransactionId)commitAsyncWriteTransaction {
try {
return _realm->async_commit_transaction();
}
catch (...) {
RLMRealmTranslateException(nil);
return 0;
}
}
- (RLMAsyncWriteTask *)beginAsyncWrite {
try {
auto write = [[RLMAsyncWriteTask alloc] initWithRealm:self];
write.transactionId = _realm->async_begin_transaction(^{ [write complete:false]; }, true);
return write;
}
catch (std::exception &ex) {
@throw RLMException(ex);
}
}
- (void)commitAsyncWriteWithGrouping:(bool)allowGrouping
completion:(void(^)(NSError *_Nullable))completion {
[self commitAsyncWriteTransaction:completion allowGrouping:allowGrouping];
}
- (RLMAsyncTransactionId)commitAsyncWriteTransaction:(void(^)(NSError *))completionBlock {
return [self commitAsyncWriteTransaction:completionBlock allowGrouping:false];
}
- (RLMAsyncTransactionId)commitAsyncWriteTransaction:(nullable void(^)(NSError *))completionBlock
allowGrouping:(BOOL)allowGrouping {
try {
auto completion = [=](std::exception_ptr err) {
@autoreleasepool {
if (!completionBlock) {
std::rethrow_exception(err);
return;
}
if (err) {
try {
std::rethrow_exception(err);
}
catch (...) {
NSError *error;
RLMRealmTranslateException(&error);
completionBlock(error);
}
} else {
completionBlock(nil);
}
}
};
if (completionBlock) {
return _realm->async_commit_transaction(completion, allowGrouping);
}
return _realm->async_commit_transaction(nullptr, allowGrouping);
}
catch (...) {
RLMRealmTranslateException(nil);
return 0;
}
}
- (void)cancelAsyncTransaction:(RLMAsyncTransactionId)asyncTransactionId {
try {
_realm->async_cancel_transaction(asyncTransactionId);
}
catch (std::exception &ex) {
@throw RLMException(ex);
}
}
- (RLMAsyncTransactionId)asyncTransactionWithBlock:(void(^)())block onComplete:(nullable void(^)(NSError *))completionBlock {
return [self beginAsyncWriteTransaction:^{
block();
if (_realm->is_in_transaction()) {
[self commitAsyncWriteTransaction:completionBlock];
}
}];
}
- (RLMAsyncTransactionId)asyncTransactionWithBlock:(void(^)())block {
return [self beginAsyncWriteTransaction:^{
block();
if (_realm->is_in_transaction()) {
[self commitAsyncWriteTransaction];
}
}];
}
- (void)invalidate {
if (_realm->is_in_transaction()) {
NSLog(@"WARNING: An RLMRealm instance was invalidated during a write "
"transaction and all pending changes have been rolled back.");
}
[self detachAllEnumerators];
for (auto& objectInfo : _info) {
for (RLMObservationInfo *info : objectInfo.second.observedObjects) {
info->willChange(RLMInvalidatedKey);
}
}
_realm->invalidate();
for (auto& objectInfo : _info) {
for (RLMObservationInfo *info : objectInfo.second.observedObjects) {
info->didChange(RLMInvalidatedKey);
}
}
if (_realm->is_frozen()) {
_realm->close();
}
}
- (nullable id)resolveThreadSafeReference:(RLMThreadSafeReference *)reference {
return [reference resolveReferenceInRealm:self];
}
/**
Replaces all string columns in this Realm with a string enumeration column and compacts the
database file.
Cannot be called from a write transaction.
Compaction will not occur if other `RLMRealm` instances exist.
While compaction is in progress, attempts by other threads or processes to open the database will
wait.
Be warned that resource requirements for compaction is proportional to the amount of live data in
the database.
Compaction works by writing the database contents to a temporary database file and then replacing
the database with the temporary one. The name of the temporary file is formed by appending
`.tmp_compaction_space` to the name of the database.
@return YES if the compaction succeeded.
*/
- (BOOL)compact {
// compact() automatically ends the read transaction, but we need to clean
// up cached state and send invalidated notifications when that happens, so
// explicitly end it first unless we're in a write transaction (in which
// case compact() will throw an exception)
if (!_realm->is_in_transaction()) {
[self invalidate];
}
try {
return _realm->compact();
}
catch (std::exception const& ex) {
@throw RLMException(ex);
}
}
- (void)dealloc {
if (_realm) {
if (_realm->is_in_transaction()) {
[self cancelWriteTransaction];
NSLog(@"WARNING: An RLMRealm instance was deallocated during a write transaction and all "
"pending changes have been rolled back. Make sure to retain a reference to the "
"RLMRealm for the duration of the write transaction.");
}
}
}
- (BOOL)refresh {
if (_realm->config().immutable()) {
@throw RLMException(@"Read-only Realms do not change and cannot be refreshed.");
}
try {
return _realm->refresh();
}
catch (std::exception const& e) {
@throw RLMException(e);
}
}
- (void)addObject:(__unsafe_unretained RLMObject *const)object {
RLMAddObjectToRealm(object, self, RLMUpdatePolicyError);
}
- (void)addObjects:(id<NSFastEnumeration>)objects {
for (RLMObject *obj in objects) {
if (![obj isKindOfClass:RLMObjectBase.class]) {
@throw RLMException(@"Cannot insert objects of type %@ with addObjects:. Only RLMObjects are supported.",
NSStringFromClass(obj.class));
}
[self addObject:obj];
}
}
- (void)addOrUpdateObject:(RLMObject *)object {
// verify primary key
if (!object.objectSchema.primaryKeyProperty) {
@throw RLMException(@"'%@' does not have a primary key and can not be updated", object.objectSchema.className);
}
RLMAddObjectToRealm(object, self, RLMUpdatePolicyUpdateAll);
}
- (void)addOrUpdateObjects:(id<NSFastEnumeration>)objects {
for (RLMObject *obj in objects) {
if (![obj isKindOfClass:RLMObjectBase.class]) {
@throw RLMException(@"Cannot add or update objects of type %@ with addOrUpdateObjects:. Only RLMObjects are"
" supported.",
NSStringFromClass(obj.class));
}
[self addOrUpdateObject:obj];
}
}
- (void)deleteObject:(RLMObject *)object {
RLMDeleteObjectFromRealm(object, self);
}
- (void)deleteObjects:(id<NSFastEnumeration>)objects {
id idObjects = objects;
if ([idObjects respondsToSelector:@selector(realm)]
&& [idObjects respondsToSelector:@selector(deleteObjectsFromRealm)]) {
if (self != (RLMRealm *)[idObjects realm]) {
@throw RLMException(@"Can only delete objects from the Realm they belong to.");
}
[idObjects deleteObjectsFromRealm];
return;
}
if (auto array = RLMDynamicCast<RLMArray>(objects)) {
if (array.type != RLMPropertyTypeObject) {
@throw RLMException(@"Cannot delete objects from RLMArray<%@>: only RLMObjects can be deleted.",
RLMTypeToString(array.type));
}
}
else if (auto set = RLMDynamicCast<RLMSet>(objects)) {
if (set.type != RLMPropertyTypeObject) {
@throw RLMException(@"Cannot delete objects from RLMSet<%@>: only RLMObjects can be deleted.",
RLMTypeToString(set.type));
}
}
else if (auto dictionary = RLMDynamicCast<RLMDictionary>(objects)) {
if (dictionary.type != RLMPropertyTypeObject) {
@throw RLMException(@"Cannot delete objects from RLMDictionary of type %@: only RLMObjects can be deleted.",
RLMTypeToString(dictionary.type));
}
for (RLMObject *obj in dictionary.allValues) {
RLMDeleteObjectFromRealm(obj, self);
}
return;
}
for (RLMObject *obj in objects) {
if (![obj isKindOfClass:RLMObjectBase.class]) {
@throw RLMException(@"Cannot delete objects of type %@ with deleteObjects:. Only RLMObjects can be deleted.",
NSStringFromClass(obj.class));
}
RLMDeleteObjectFromRealm(obj, self);
}
}
- (void)deleteAllObjects {
RLMDeleteAllObjectsFromRealm(self);
}
- (RLMResults *)allObjects:(NSString *)objectClassName {
return RLMGetObjects(self, objectClassName, nil);
}
- (RLMResults *)objects:(NSString *)objectClassName where:(NSString *)predicateFormat, ... {
va_list args;
va_start(args, predicateFormat);
RLMResults *results = [self objects:objectClassName where:predicateFormat args:args];
va_end(args);
return results;
}
- (RLMResults *)objects:(NSString *)objectClassName where:(NSString *)predicateFormat args:(va_list)args {
return [self objects:objectClassName withPredicate:[NSPredicate predicateWithFormat:predicateFormat arguments:args]];
}
- (RLMResults *)objects:(NSString *)objectClassName withPredicate:(NSPredicate *)predicate {
return RLMGetObjects(self, objectClassName, predicate);
}
- (RLMObject *)objectWithClassName:(NSString *)className forPrimaryKey:(id)primaryKey {
return RLMGetObject(self, className, primaryKey);
}
+ (uint64_t)schemaVersionAtURL:(NSURL *)fileURL encryptionKey:(NSData *)key error:(NSError **)error {
RLMRealmConfiguration *config = [[RLMRealmConfiguration alloc] init];
config.fileURL = fileURL;
config.encryptionKey = RLMRealmValidatedEncryptionKey(key);
uint64_t version = RLMNotVersioned;
try {
version = Realm::get_schema_version(config.configRef);
}
catch (...) {
RLMRealmTranslateException(error);
return version;
}
if (error && version == realm::ObjectStore::NotVersioned) {
auto msg = [NSString stringWithFormat:@"Realm at path '%@' has not been initialized.", fileURL.path];
*error = [NSError errorWithDomain:RLMErrorDomain
code:RLMErrorInvalidDatabase
userInfo:@{NSLocalizedDescriptionKey: msg,
NSFilePathErrorKey: fileURL.path}];
}