<?php 
 
declare(strict_types=1); 
 
namespace Doctrine\ORM; 
 
use DateTimeInterface; 
use Doctrine\Common\Collections\ArrayCollection; 
use Doctrine\Common\Collections\Collection; 
use Doctrine\Common\EventManager; 
use Doctrine\Common\Proxy\Proxy; 
use Doctrine\DBAL\Connections\PrimaryReadReplicaConnection; 
use Doctrine\DBAL\LockMode; 
use Doctrine\Deprecations\Deprecation; 
use Doctrine\ORM\Cache\Persister\CachedPersister; 
use Doctrine\ORM\Event\LifecycleEventArgs; 
use Doctrine\ORM\Event\ListenersInvoker; 
use Doctrine\ORM\Event\OnFlushEventArgs; 
use Doctrine\ORM\Event\PostFlushEventArgs; 
use Doctrine\ORM\Event\PreFlushEventArgs; 
use Doctrine\ORM\Event\PreUpdateEventArgs; 
use Doctrine\ORM\Exception\UnexpectedAssociationValue; 
use Doctrine\ORM\Id\AssignedGenerator; 
use Doctrine\ORM\Internal\CommitOrderCalculator; 
use Doctrine\ORM\Internal\HydrationCompleteHandler; 
use Doctrine\ORM\Mapping\ClassMetadata; 
use Doctrine\ORM\Mapping\MappingException; 
use Doctrine\ORM\Mapping\Reflection\ReflectionPropertiesGetter; 
use Doctrine\ORM\Persisters\Collection\CollectionPersister; 
use Doctrine\ORM\Persisters\Collection\ManyToManyPersister; 
use Doctrine\ORM\Persisters\Collection\OneToManyPersister; 
use Doctrine\ORM\Persisters\Entity\BasicEntityPersister; 
use Doctrine\ORM\Persisters\Entity\EntityPersister; 
use Doctrine\ORM\Persisters\Entity\JoinedSubclassPersister; 
use Doctrine\ORM\Persisters\Entity\SingleTablePersister; 
use Doctrine\ORM\Utility\IdentifierFlattener; 
use Doctrine\Persistence\Mapping\RuntimeReflectionService; 
use Doctrine\Persistence\NotifyPropertyChanged; 
use Doctrine\Persistence\ObjectManagerAware; 
use Doctrine\Persistence\PropertyChangedListener; 
use Exception; 
use InvalidArgumentException; 
use RuntimeException; 
use Throwable; 
use UnexpectedValueException; 
 
use function array_combine; 
use function array_diff_key; 
use function array_filter; 
use function array_key_exists; 
use function array_map; 
use function array_merge; 
use function array_pop; 
use function array_sum; 
use function array_values; 
use function count; 
use function current; 
use function get_class; 
use function get_debug_type; 
use function implode; 
use function in_array; 
use function is_array; 
use function is_object; 
use function method_exists; 
use function reset; 
use function spl_object_id; 
use function sprintf; 
 
/** 
 * The UnitOfWork is responsible for tracking changes to objects during an 
 * "object-level" transaction and for writing out changes to the database 
 * in the correct order. 
 * 
 * Internal note: This class contains highly performance-sensitive code. 
 */ 
class UnitOfWork implements PropertyChangedListener 
{ 
    /** 
     * An entity is in MANAGED state when its persistence is managed by an EntityManager. 
     */ 
    public const STATE_MANAGED = 1; 
 
    /** 
     * An entity is new if it has just been instantiated (i.e. using the "new" operator) 
     * and is not (yet) managed by an EntityManager. 
     */ 
    public const STATE_NEW = 2; 
 
    /** 
     * A detached entity is an instance with persistent state and identity that is not 
     * (or no longer) associated with an EntityManager (and a UnitOfWork). 
     */ 
    public const STATE_DETACHED = 3; 
 
    /** 
     * A removed entity instance is an instance with a persistent identity, 
     * associated with an EntityManager, whose persistent state will be deleted 
     * on commit. 
     */ 
    public const STATE_REMOVED = 4; 
 
    /** 
     * Hint used to collect all primary keys of associated entities during hydration 
     * and execute it in a dedicated query afterwards 
     * 
     * @see https://www.doctrine-project.org/projects/doctrine-orm/en/latest/reference/dql-doctrine-query-language.html#temporarily-change-fetch-mode-in-dql 
     */ 
    public const HINT_DEFEREAGERLOAD = 'deferEagerLoad'; 
 
    /** 
     * The identity map that holds references to all managed entities that have 
     * an identity. The entities are grouped by their class name. 
     * Since all classes in a hierarchy must share the same identifier set, 
     * we always take the root class name of the hierarchy. 
     * 
     * @var mixed[] 
     * @psalm-var array<class-string, array<string, object|null>> 
     */ 
    private $identityMap = []; 
 
    /** 
     * Map of all identifiers of managed entities. 
     * Keys are object ids (spl_object_id). 
     * 
     * @var mixed[] 
     * @psalm-var array<int, array<string, mixed>> 
     */ 
    private $entityIdentifiers = []; 
 
    /** 
     * Map of the original entity data of managed entities. 
     * Keys are object ids (spl_object_id). This is used for calculating changesets 
     * at commit time. 
     * 
     * Internal note: Note that PHPs "copy-on-write" behavior helps a lot with memory usage. 
     *                A value will only really be copied if the value in the entity is modified 
     *                by the user. 
     * 
     * @psalm-var array<int, array<string, mixed>> 
     */ 
    private $originalEntityData = []; 
 
    /** 
     * Map of entity changes. Keys are object ids (spl_object_id). 
     * Filled at the beginning of a commit of the UnitOfWork and cleaned at the end. 
     * 
     * @psalm-var array<int, array<string, array{mixed, mixed}>> 
     */ 
    private $entityChangeSets = []; 
 
    /** 
     * The (cached) states of any known entities. 
     * Keys are object ids (spl_object_id). 
     * 
     * @psalm-var array<int, self::STATE_*> 
     */ 
    private $entityStates = []; 
 
    /** 
     * Map of entities that are scheduled for dirty checking at commit time. 
     * This is only used for entities with a change tracking policy of DEFERRED_EXPLICIT. 
     * Keys are object ids (spl_object_id). 
     * 
     * @psalm-var array<class-string, array<int, mixed>> 
     */ 
    private $scheduledForSynchronization = []; 
 
    /** 
     * A list of all pending entity insertions. 
     * 
     * @psalm-var array<int, object> 
     */ 
    private $entityInsertions = []; 
 
    /** 
     * A list of all pending entity updates. 
     * 
     * @psalm-var array<int, object> 
     */ 
    private $entityUpdates = []; 
 
    /** 
     * Any pending extra updates that have been scheduled by persisters. 
     * 
     * @psalm-var array<int, array{object, array<string, array{mixed, mixed}>}> 
     */ 
    private $extraUpdates = []; 
 
    /** 
     * A list of all pending entity deletions. 
     * 
     * @psalm-var array<int, object> 
     */ 
    private $entityDeletions = []; 
 
    /** 
     * New entities that were discovered through relationships that were not 
     * marked as cascade-persist. During flush, this array is populated and 
     * then pruned of any entities that were discovered through a valid 
     * cascade-persist path. (Leftovers cause an error.) 
     * 
     * Keys are OIDs, payload is a two-item array describing the association 
     * and the entity. 
     * 
     * @var object[][]|array[][] indexed by respective object spl_object_id() 
     */ 
    private $nonCascadedNewDetectedEntities = []; 
 
    /** 
     * All pending collection deletions. 
     * 
     * @psalm-var array<int, Collection<array-key, object>> 
     */ 
    private $collectionDeletions = []; 
 
    /** 
     * All pending collection updates. 
     * 
     * @psalm-var array<int, Collection<array-key, object>> 
     */ 
    private $collectionUpdates = []; 
 
    /** 
     * List of collections visited during changeset calculation on a commit-phase of a UnitOfWork. 
     * At the end of the UnitOfWork all these collections will make new snapshots 
     * of their data. 
     * 
     * @psalm-var array<int, Collection<array-key, object>> 
     */ 
    private $visitedCollections = []; 
 
    /** 
     * The EntityManager that "owns" this UnitOfWork instance. 
     * 
     * @var EntityManagerInterface 
     */ 
    private $em; 
 
    /** 
     * The entity persister instances used to persist entity instances. 
     * 
     * @psalm-var array<string, EntityPersister> 
     */ 
    private $persisters = []; 
 
    /** 
     * The collection persister instances used to persist collections. 
     * 
     * @psalm-var array<string, CollectionPersister> 
     */ 
    private $collectionPersisters = []; 
 
    /** 
     * The EventManager used for dispatching events. 
     * 
     * @var EventManager 
     */ 
    private $evm; 
 
    /** 
     * The ListenersInvoker used for dispatching events. 
     * 
     * @var ListenersInvoker 
     */ 
    private $listenersInvoker; 
 
    /** 
     * The IdentifierFlattener used for manipulating identifiers 
     * 
     * @var IdentifierFlattener 
     */ 
    private $identifierFlattener; 
 
    /** 
     * Orphaned entities that are scheduled for removal. 
     * 
     * @psalm-var array<int, object> 
     */ 
    private $orphanRemovals = []; 
 
    /** 
     * Read-Only objects are never evaluated 
     * 
     * @var array<int, true> 
     */ 
    private $readOnlyObjects = []; 
 
    /** 
     * Map of Entity Class-Names and corresponding IDs that should eager loaded when requested. 
     * 
     * @psalm-var array<class-string, array<string, mixed>> 
     */ 
    private $eagerLoadingEntities = []; 
 
    /** @var bool */ 
    protected $hasCache = false; 
 
    /** 
     * Helper for handling completion of hydration 
     * 
     * @var HydrationCompleteHandler 
     */ 
    private $hydrationCompleteHandler; 
 
    /** @var ReflectionPropertiesGetter */ 
    private $reflectionPropertiesGetter; 
 
    /** 
     * Initializes a new UnitOfWork instance, bound to the given EntityManager. 
     */ 
    public function __construct(EntityManagerInterface $em) 
    { 
        $this->em                         = $em; 
        $this->evm                        = $em->getEventManager(); 
        $this->listenersInvoker           = new ListenersInvoker($em); 
        $this->hasCache                   = $em->getConfiguration()->isSecondLevelCacheEnabled(); 
        $this->identifierFlattener        = new IdentifierFlattener($this, $em->getMetadataFactory()); 
        $this->hydrationCompleteHandler   = new HydrationCompleteHandler($this->listenersInvoker, $em); 
        $this->reflectionPropertiesGetter = new ReflectionPropertiesGetter(new RuntimeReflectionService()); 
    } 
 
    /** 
     * Commits the UnitOfWork, executing all operations that have been postponed 
     * up to this point. The state of all managed entities will be synchronized with 
     * the database. 
     * 
     * The operations are executed in the following order: 
     * 
     * 1) All entity insertions 
     * 2) All entity updates 
     * 3) All collection deletions 
     * 4) All collection updates 
     * 5) All entity deletions 
     * 
     * @param object|mixed[]|null $entity 
     * 
     * @return void 
     * 
     * @throws Exception 
     */ 
    public function commit($entity = null) 
    { 
        if ($entity !== null) { 
            Deprecation::triggerIfCalledFromOutside( 
                'doctrine/orm', 
                'https://github.com/doctrine/orm/issues/8459', 
                'Calling %s() with any arguments to commit specific entities is deprecated and will not be supported in Doctrine ORM 3.0.', 
                __METHOD__ 
            ); 
        } 
 
        $connection = $this->em->getConnection(); 
 
        if ($connection instanceof PrimaryReadReplicaConnection) { 
            $connection->ensureConnectedToPrimary(); 
        } 
 
        // Raise preFlush 
        if ($this->evm->hasListeners(Events::preFlush)) { 
            $this->evm->dispatchEvent(Events::preFlush, new PreFlushEventArgs($this->em)); 
        } 
 
        // Compute changes done since last commit. 
        if ($entity === null) { 
            $this->computeChangeSets(); 
        } elseif (is_object($entity)) { 
            $this->computeSingleEntityChangeSet($entity); 
        } elseif (is_array($entity)) { 
            foreach ($entity as $object) { 
                $this->computeSingleEntityChangeSet($object); 
            } 
        } 
 
        if ( 
            ! ($this->entityInsertions || 
                $this->entityDeletions || 
                $this->entityUpdates || 
                $this->collectionUpdates || 
                $this->collectionDeletions || 
                $this->orphanRemovals) 
        ) { 
            $this->dispatchOnFlushEvent(); 
            $this->dispatchPostFlushEvent(); 
 
            $this->postCommitCleanup($entity); 
 
            return; // Nothing to do. 
        } 
 
        $this->assertThatThereAreNoUnintentionallyNonPersistedAssociations(); 
 
        if ($this->orphanRemovals) { 
            foreach ($this->orphanRemovals as $orphan) { 
                $this->remove($orphan); 
            } 
        } 
 
        $this->dispatchOnFlushEvent(); 
 
        // Now we need a commit order to maintain referential integrity 
        $commitOrder = $this->getCommitOrder(); 
 
        $conn = $this->em->getConnection(); 
        $conn->beginTransaction(); 
 
        try { 
            // Collection deletions (deletions of complete collections) 
            foreach ($this->collectionDeletions as $collectionToDelete) { 
                if (! $collectionToDelete instanceof PersistentCollection) { 
                    $this->getCollectionPersister($collectionToDelete->getMapping())->delete($collectionToDelete); 
 
                    continue; 
                } 
 
                // Deferred explicit tracked collections can be removed only when owning relation was persisted 
                $owner = $collectionToDelete->getOwner(); 
 
                if ($this->em->getClassMetadata(get_class($owner))->isChangeTrackingDeferredImplicit() || $this->isScheduledForDirtyCheck($owner)) { 
                    $this->getCollectionPersister($collectionToDelete->getMapping())->delete($collectionToDelete); 
                } 
            } 
 
            if ($this->entityInsertions) { 
                foreach ($commitOrder as $class) { 
                    $this->executeInserts($class); 
                } 
            } 
 
            if ($this->entityUpdates) { 
                foreach ($commitOrder as $class) { 
                    $this->executeUpdates($class); 
                } 
            } 
 
            // Extra updates that were requested by persisters. 
            if ($this->extraUpdates) { 
                $this->executeExtraUpdates(); 
            } 
 
            // Collection updates (deleteRows, updateRows, insertRows) 
            foreach ($this->collectionUpdates as $collectionToUpdate) { 
                $this->getCollectionPersister($collectionToUpdate->getMapping())->update($collectionToUpdate); 
            } 
 
            // Entity deletions come last and need to be in reverse commit order 
            if ($this->entityDeletions) { 
                for ($count = count($commitOrder), $i = $count - 1; $i >= 0 && $this->entityDeletions; --$i) { 
                    $this->executeDeletions($commitOrder[$i]); 
                } 
            } 
 
            // Commit failed silently 
            if ($conn->commit() === false) { 
                $object = is_object($entity) ? $entity : null; 
 
                throw new OptimisticLockException('Commit failed', $object); 
            } 
        } catch (Throwable $e) { 
            $this->em->close(); 
 
            if ($conn->isTransactionActive()) { 
                $conn->rollBack(); 
            } 
 
            $this->afterTransactionRolledBack(); 
 
            throw $e; 
        } 
 
        $this->afterTransactionComplete(); 
 
        // Take new snapshots from visited collections 
        foreach ($this->visitedCollections as $coll) { 
            $coll->takeSnapshot(); 
        } 
 
        $this->dispatchPostFlushEvent(); 
 
        $this->postCommitCleanup($entity); 
    } 
 
    /** 
     * @param object|object[]|null $entity 
     */ 
    private function postCommitCleanup($entity): void 
    { 
        $this->entityInsertions               = 
        $this->entityUpdates                  = 
        $this->entityDeletions                = 
        $this->extraUpdates                   = 
        $this->collectionUpdates              = 
        $this->nonCascadedNewDetectedEntities = 
        $this->collectionDeletions            = 
        $this->visitedCollections             = 
        $this->orphanRemovals                 = []; 
 
        if ($entity === null) { 
            $this->entityChangeSets = $this->scheduledForSynchronization = []; 
 
            return; 
        } 
 
        $entities = is_object($entity) 
            ? [$entity] 
            : $entity; 
 
        foreach ($entities as $object) { 
            $oid = spl_object_id($object); 
 
            $this->clearEntityChangeSet($oid); 
 
            unset($this->scheduledForSynchronization[$this->em->getClassMetadata(get_class($object))->rootEntityName][$oid]); 
        } 
    } 
 
    /** 
     * Computes the changesets of all entities scheduled for insertion. 
     */ 
    private function computeScheduleInsertsChangeSets(): void 
    { 
        foreach ($this->entityInsertions as $entity) { 
            $class = $this->em->getClassMetadata(get_class($entity)); 
 
            $this->computeChangeSet($class, $entity); 
        } 
    } 
 
    /** 
     * Only flushes the given entity according to a ruleset that keeps the UoW consistent. 
     * 
     * 1. All entities scheduled for insertion, (orphan) removals and changes in collections are processed as well! 
     * 2. Read Only entities are skipped. 
     * 3. Proxies are skipped. 
     * 4. Only if entity is properly managed. 
     * 
     * @param object $entity 
     * 
     * @throws InvalidArgumentException 
     */ 
    private function computeSingleEntityChangeSet($entity): void 
    { 
        $state = $this->getEntityState($entity); 
 
        if ($state !== self::STATE_MANAGED && $state !== self::STATE_REMOVED) { 
            throw new InvalidArgumentException('Entity has to be managed or scheduled for removal for single computation ' . self::objToStr($entity)); 
        } 
 
        $class = $this->em->getClassMetadata(get_class($entity)); 
 
        if ($state === self::STATE_MANAGED && $class->isChangeTrackingDeferredImplicit()) { 
            $this->persist($entity); 
        } 
 
        // Compute changes for INSERTed entities first. This must always happen even in this case. 
        $this->computeScheduleInsertsChangeSets(); 
 
        if ($class->isReadOnly) { 
            return; 
        } 
 
        // Ignore uninitialized proxy objects 
        if ($entity instanceof Proxy && ! $entity->__isInitialized()) { 
            return; 
        } 
 
        // Only MANAGED entities that are NOT SCHEDULED FOR INSERTION OR DELETION are processed here. 
        $oid = spl_object_id($entity); 
 
        if (! isset($this->entityInsertions[$oid]) && ! isset($this->entityDeletions[$oid]) && isset($this->entityStates[$oid])) { 
            $this->computeChangeSet($class, $entity); 
        } 
    } 
 
    /** 
     * Executes any extra updates that have been scheduled. 
     */ 
    private function executeExtraUpdates(): void 
    { 
        foreach ($this->extraUpdates as $oid => $update) { 
            [$entity, $changeset] = $update; 
 
            $this->entityChangeSets[$oid] = $changeset; 
            $this->getEntityPersister(get_class($entity))->update($entity); 
        } 
 
        $this->extraUpdates = []; 
    } 
 
    /** 
     * Gets the changeset for an entity. 
     * 
     * @param object $entity 
     * 
     * @return mixed[][] 
     * @psalm-return array<string, array{mixed, mixed}|PersistentCollection> 
     */ 
    public function & getEntityChangeSet($entity) 
    { 
        $oid  = spl_object_id($entity); 
        $data = []; 
 
        if (! isset($this->entityChangeSets[$oid])) { 
            return $data; 
        } 
 
        return $this->entityChangeSets[$oid]; 
    } 
 
    /** 
     * Computes the changes that happened to a single entity. 
     * 
     * Modifies/populates the following properties: 
     * 
     * {@link _originalEntityData} 
     * If the entity is NEW or MANAGED but not yet fully persisted (only has an id) 
     * then it was not fetched from the database and therefore we have no original 
     * entity data yet. All of the current entity data is stored as the original entity data. 
     * 
     * {@link _entityChangeSets} 
     * The changes detected on all properties of the entity are stored there. 
     * A change is a tuple array where the first entry is the old value and the second 
     * entry is the new value of the property. Changesets are used by persisters 
     * to INSERT/UPDATE the persistent entity state. 
     * 
     * {@link _entityUpdates} 
     * If the entity is already fully MANAGED (has been fetched from the database before) 
     * and any changes to its properties are detected, then a reference to the entity is stored 
     * there to mark it for an update. 
     * 
     * {@link _collectionDeletions} 
     * If a PersistentCollection has been de-referenced in a fully MANAGED entity, 
     * then this collection is marked for deletion. 
     * 
     * @param ClassMetadata $class  The class descriptor of the entity. 
     * @param object        $entity The entity for which to compute the changes. 
     * @psalm-param ClassMetadata<T> $class 
     * @psalm-param T $entity 
     * 
     * @return void 
     * 
     * @template T of object 
     * 
     * @ignore 
     */ 
    public function computeChangeSet(ClassMetadata $class, $entity) 
    { 
        $oid = spl_object_id($entity); 
 
        if (isset($this->readOnlyObjects[$oid])) { 
            return; 
        } 
 
        if (! $class->isInheritanceTypeNone()) { 
            $class = $this->em->getClassMetadata(get_class($entity)); 
        } 
 
        $invoke = $this->listenersInvoker->getSubscribedSystems($class, Events::preFlush) & ~ListenersInvoker::INVOKE_MANAGER; 
 
        if ($invoke !== ListenersInvoker::INVOKE_NONE) { 
            $this->listenersInvoker->invoke($class, Events::preFlush, $entity, new PreFlushEventArgs($this->em), $invoke); 
        } 
 
        $actualData = []; 
 
        foreach ($class->reflFields as $name => $refProp) { 
            $value = $refProp->getValue($entity); 
 
            if ($class->isCollectionValuedAssociation($name) && $value !== null) { 
                if ($value instanceof PersistentCollection) { 
                    if ($value->getOwner() === $entity) { 
                        continue; 
                    } 
 
                    $value = new ArrayCollection($value->getValues()); 
                } 
 
                // If $value is not a Collection then use an ArrayCollection. 
                if (! $value instanceof Collection) { 
                    $value = new ArrayCollection($value); 
                } 
 
                $assoc = $class->associationMappings[$name]; 
 
                // Inject PersistentCollection 
                $value = new PersistentCollection( 
                    $this->em, 
                    $this->em->getClassMetadata($assoc['targetEntity']), 
                    $value 
                ); 
                $value->setOwner($entity, $assoc); 
                $value->setDirty(! $value->isEmpty()); 
 
                $class->reflFields[$name]->setValue($entity, $value); 
 
                $actualData[$name] = $value; 
 
                continue; 
            } 
 
            if (( ! $class->isIdentifier($name) || ! $class->isIdGeneratorIdentity()) && ($name !== $class->versionField)) { 
                $actualData[$name] = $value; 
            } 
        } 
 
        if (! isset($this->originalEntityData[$oid])) { 
            // Entity is either NEW or MANAGED but not yet fully persisted (only has an id). 
            // These result in an INSERT. 
            $this->originalEntityData[$oid] = $actualData; 
            $changeSet                      = []; 
 
            foreach ($actualData as $propName => $actualValue) { 
                if (! isset($class->associationMappings[$propName])) { 
                    $changeSet[$propName] = [null, $actualValue]; 
 
                    continue; 
                } 
 
                $assoc = $class->associationMappings[$propName]; 
 
                if ($assoc['isOwningSide'] && $assoc['type'] & ClassMetadata::TO_ONE) { 
                    $changeSet[$propName] = [null, $actualValue]; 
                } 
            } 
 
            $this->entityChangeSets[$oid] = $changeSet; 
        } else { 
            // Entity is "fully" MANAGED: it was already fully persisted before 
            // and we have a copy of the original data 
            $originalData           = $this->originalEntityData[$oid]; 
            $isChangeTrackingNotify = $class->isChangeTrackingNotify(); 
            $changeSet              = $isChangeTrackingNotify && isset($this->entityChangeSets[$oid]) 
                ? $this->entityChangeSets[$oid] 
                : []; 
 
            foreach ($actualData as $propName => $actualValue) { 
                // skip field, its a partially omitted one! 
                if (! (isset($originalData[$propName]) || array_key_exists($propName, $originalData))) { 
                    continue; 
                } 
 
                $orgValue = $originalData[$propName]; 
 
                // skip if value haven't changed 
                if ($orgValue === $actualValue) { 
                    continue; 
                } 
 
                // if regular field 
                if (! isset($class->associationMappings[$propName])) { 
                    if ($isChangeTrackingNotify) { 
                        continue; 
                    } 
 
                    $changeSet[$propName] = [$orgValue, $actualValue]; 
 
                    continue; 
                } 
 
                $assoc = $class->associationMappings[$propName]; 
 
                // Persistent collection was exchanged with the "originally" 
                // created one. This can only mean it was cloned and replaced 
                // on another entity. 
                if ($actualValue instanceof PersistentCollection) { 
                    $owner = $actualValue->getOwner(); 
                    if ($owner === null) { // cloned 
                        $actualValue->setOwner($entity, $assoc); 
                    } elseif ($owner !== $entity) { // no clone, we have to fix 
                        if (! $actualValue->isInitialized()) { 
                            $actualValue->initialize(); // we have to do this otherwise the cols share state 
                        } 
 
                        $newValue = clone $actualValue; 
                        $newValue->setOwner($entity, $assoc); 
                        $class->reflFields[$propName]->setValue($entity, $newValue); 
                    } 
                } 
 
                if ($orgValue instanceof PersistentCollection) { 
                    // A PersistentCollection was de-referenced, so delete it. 
                    $coid = spl_object_id($orgValue); 
 
                    if (isset($this->collectionDeletions[$coid])) { 
                        continue; 
                    } 
 
                    $this->collectionDeletions[$coid] = $orgValue; 
                    $changeSet[$propName]             = $orgValue; // Signal changeset, to-many assocs will be ignored. 
 
                    continue; 
                } 
 
                if ($assoc['type'] & ClassMetadata::TO_ONE) { 
                    if ($assoc['isOwningSide']) { 
                        $changeSet[$propName] = [$orgValue, $actualValue]; 
                    } 
 
                    if ($orgValue !== null && $assoc['orphanRemoval']) { 
                        $this->scheduleOrphanRemoval($orgValue); 
                    } 
                } 
            } 
 
            if ($changeSet) { 
                $this->entityChangeSets[$oid]   = $changeSet; 
                $this->originalEntityData[$oid] = $actualData; 
                $this->entityUpdates[$oid]      = $entity; 
            } 
        } 
 
        // Look for changes in associations of the entity 
        foreach ($class->associationMappings as $field => $assoc) { 
            $val = $class->reflFields[$field]->getValue($entity); 
            if ($val === null) { 
                continue; 
            } 
 
            $this->computeAssociationChanges($assoc, $val); 
 
            if ( 
                ! isset($this->entityChangeSets[$oid]) && 
                $assoc['isOwningSide'] && 
                $assoc['type'] === ClassMetadata::MANY_TO_MANY && 
                $val instanceof PersistentCollection && 
                $val->isDirty() 
            ) { 
                $this->entityChangeSets[$oid]   = []; 
                $this->originalEntityData[$oid] = $actualData; 
                $this->entityUpdates[$oid]      = $entity; 
            } 
        } 
    } 
 
    /** 
     * Computes all the changes that have been done to entities and collections 
     * since the last commit and stores these changes in the _entityChangeSet map 
     * temporarily for access by the persisters, until the UoW commit is finished. 
     * 
     * @return void 
     */ 
    public function computeChangeSets() 
    { 
        // Compute changes for INSERTed entities first. This must always happen. 
        $this->computeScheduleInsertsChangeSets(); 
 
        // Compute changes for other MANAGED entities. Change tracking policies take effect here. 
        foreach ($this->identityMap as $className => $entities) { 
            $class = $this->em->getClassMetadata($className); 
 
            // Skip class if instances are read-only 
            if ($class->isReadOnly) { 
                continue; 
            } 
 
            // If change tracking is explicit or happens through notification, then only compute 
            // changes on entities of that type that are explicitly marked for synchronization. 
            switch (true) { 
                case $class->isChangeTrackingDeferredImplicit(): 
                    $entitiesToProcess = $entities; 
                    break; 
 
                case isset($this->scheduledForSynchronization[$className]): 
                    $entitiesToProcess = $this->scheduledForSynchronization[$className]; 
                    break; 
 
                default: 
                    $entitiesToProcess = []; 
            } 
 
            foreach ($entitiesToProcess as $entity) { 
                // Ignore uninitialized proxy objects 
                if ($entity instanceof Proxy && ! $entity->__isInitialized()) { 
                    continue; 
                } 
 
                // Only MANAGED entities that are NOT SCHEDULED FOR INSERTION OR DELETION are processed here. 
                $oid = spl_object_id($entity); 
 
                if (! isset($this->entityInsertions[$oid]) && ! isset($this->entityDeletions[$oid]) && isset($this->entityStates[$oid])) { 
                    $this->computeChangeSet($class, $entity); 
                } 
            } 
        } 
    } 
 
    /** 
     * Computes the changes of an association. 
     * 
     * @param mixed $value The value of the association. 
     * @psalm-param array<string, mixed> $assoc The association mapping. 
     * 
     * @throws ORMInvalidArgumentException 
     * @throws ORMException 
     */ 
    private function computeAssociationChanges(array $assoc, $value): void 
    { 
        if ($value instanceof Proxy && ! $value->__isInitialized()) { 
            return; 
        } 
 
        if ($value instanceof PersistentCollection && $value->isDirty()) { 
            $coid = spl_object_id($value); 
 
            $this->collectionUpdates[$coid]  = $value; 
            $this->visitedCollections[$coid] = $value; 
        } 
 
        // Look through the entities, and in any of their associations, 
        // for transient (new) entities, recursively. ("Persistence by reachability") 
        // Unwrap. Uninitialized collections will simply be empty. 
        $unwrappedValue = $assoc['type'] & ClassMetadata::TO_ONE ? [$value] : $value->unwrap(); 
        $targetClass    = $this->em->getClassMetadata($assoc['targetEntity']); 
 
        foreach ($unwrappedValue as $key => $entry) { 
            if (! ($entry instanceof $targetClass->name)) { 
                throw ORMInvalidArgumentException::invalidAssociation($targetClass, $assoc, $entry); 
            } 
 
            $state = $this->getEntityState($entry, self::STATE_NEW); 
 
            if (! ($entry instanceof $assoc['targetEntity'])) { 
                throw UnexpectedAssociationValue::create( 
                    $assoc['sourceEntity'], 
                    $assoc['fieldName'], 
                    get_debug_type($entry), 
                    $assoc['targetEntity'] 
                ); 
            } 
 
            switch ($state) { 
                case self::STATE_NEW: 
                    if (! $assoc['isCascadePersist']) { 
                        /* 
                         * For now just record the details, because this may 
                         * not be an issue if we later discover another pathway 
                         * through the object-graph where cascade-persistence 
                         * is enabled for this object. 
                         */ 
                        $this->nonCascadedNewDetectedEntities[spl_object_id($entry)] = [$assoc, $entry]; 
 
                        break; 
                    } 
 
                    $this->persistNew($targetClass, $entry); 
                    $this->computeChangeSet($targetClass, $entry); 
 
                    break; 
 
                case self::STATE_REMOVED: 
                    // Consume the $value as array (it's either an array or an ArrayAccess) 
                    // and remove the element from Collection. 
                    if ($assoc['type'] & ClassMetadata::TO_MANY) { 
                        unset($value[$key]); 
                    } 
 
                    break; 
 
                case self::STATE_DETACHED: 
                    // Can actually not happen right now as we assume STATE_NEW, 
                    // so the exception will be raised from the DBAL layer (constraint violation). 
                    throw ORMInvalidArgumentException::detachedEntityFoundThroughRelationship($assoc, $entry); 
 
                default: 
                    // MANAGED associated entities are already taken into account 
                    // during changeset calculation anyway, since they are in the identity map. 
            } 
        } 
    } 
 
    /** 
     * @param object $entity 
     * @psalm-param ClassMetadata<T> $class 
     * @psalm-param T $entity 
     * 
     * @template T of object 
     */ 
    private function persistNew(ClassMetadata $class, $entity): void 
    { 
        $oid    = spl_object_id($entity); 
        $invoke = $this->listenersInvoker->getSubscribedSystems($class, Events::prePersist); 
 
        if ($invoke !== ListenersInvoker::INVOKE_NONE) { 
            $this->listenersInvoker->invoke($class, Events::prePersist, $entity, new LifecycleEventArgs($entity, $this->em), $invoke); 
        } 
 
        $idGen = $class->idGenerator; 
 
        if (! $idGen->isPostInsertGenerator()) { 
            $idValue = $idGen->generateId($this->em, $entity); 
 
            if (! $idGen instanceof AssignedGenerator) { 
                $idValue = [$class->getSingleIdentifierFieldName() => $this->convertSingleFieldIdentifierToPHPValue($class, $idValue)]; 
 
                $class->setIdentifierValues($entity, $idValue); 
            } 
 
            // Some identifiers may be foreign keys to new entities. 
            // In this case, we don't have the value yet and should treat it as if we have a post-insert generator 
            if (! $this->hasMissingIdsWhichAreForeignKeys($class, $idValue)) { 
                $this->entityIdentifiers[$oid] = $idValue; 
            } 
        } 
 
        $this->entityStates[$oid] = self::STATE_MANAGED; 
 
        $this->scheduleForInsert($entity); 
    } 
 
    /** 
     * @param mixed[] $idValue 
     */ 
    private function hasMissingIdsWhichAreForeignKeys(ClassMetadata $class, array $idValue): bool 
    { 
        foreach ($idValue as $idField => $idFieldValue) { 
            if ($idFieldValue === null && isset($class->associationMappings[$idField])) { 
                return true; 
            } 
        } 
 
        return false; 
    } 
 
    /** 
     * INTERNAL: 
     * Computes the changeset of an individual entity, independently of the 
     * computeChangeSets() routine that is used at the beginning of a UnitOfWork#commit(). 
     * 
     * The passed entity must be a managed entity. If the entity already has a change set 
     * because this method is invoked during a commit cycle then the change sets are added. 
     * whereby changes detected in this method prevail. 
     * 
     * @param ClassMetadata $class  The class descriptor of the entity. 
     * @param object        $entity The entity for which to (re)calculate the change set. 
     * @psalm-param ClassMetadata<T> $class 
     * @psalm-param T $entity 
     * 
     * @return void 
     * 
     * @throws ORMInvalidArgumentException If the passed entity is not MANAGED. 
     * 
     * @template T of object 
     * @ignore 
     */ 
    public function recomputeSingleEntityChangeSet(ClassMetadata $class, $entity) 
    { 
        $oid = spl_object_id($entity); 
 
        if (! isset($this->entityStates[$oid]) || $this->entityStates[$oid] !== self::STATE_MANAGED) { 
            throw ORMInvalidArgumentException::entityNotManaged($entity); 
        } 
 
        // skip if change tracking is "NOTIFY" 
        if ($class->isChangeTrackingNotify()) { 
            return; 
        } 
 
        if (! $class->isInheritanceTypeNone()) { 
            $class = $this->em->getClassMetadata(get_class($entity)); 
        } 
 
        $actualData = []; 
 
        foreach ($class->reflFields as $name => $refProp) { 
            if ( 
                ( ! $class->isIdentifier($name) || ! $class->isIdGeneratorIdentity()) 
                && ($name !== $class->versionField) 
                && ! $class->isCollectionValuedAssociation($name) 
            ) { 
                $actualData[$name] = $refProp->getValue($entity); 
            } 
        } 
 
        if (! isset($this->originalEntityData[$oid])) { 
            throw new RuntimeException('Cannot call recomputeSingleEntityChangeSet before computeChangeSet on an entity.'); 
        } 
 
        $originalData = $this->originalEntityData[$oid]; 
        $changeSet    = []; 
 
        foreach ($actualData as $propName => $actualValue) { 
            $orgValue = $originalData[$propName] ?? null; 
 
            if ($orgValue !== $actualValue) { 
                $changeSet[$propName] = [$orgValue, $actualValue]; 
            } 
        } 
 
        if ($changeSet) { 
            if (isset($this->entityChangeSets[$oid])) { 
                $this->entityChangeSets[$oid] = array_merge($this->entityChangeSets[$oid], $changeSet); 
            } elseif (! isset($this->entityInsertions[$oid])) { 
                $this->entityChangeSets[$oid] = $changeSet; 
                $this->entityUpdates[$oid]    = $entity; 
            } 
 
            $this->originalEntityData[$oid] = $actualData; 
        } 
    } 
 
    /** 
     * Executes all entity insertions for entities of the specified type. 
     */ 
    private function executeInserts(ClassMetadata $class): void 
    { 
        $entities  = []; 
        $className = $class->name; 
        $persister = $this->getEntityPersister($className); 
        $invoke    = $this->listenersInvoker->getSubscribedSystems($class, Events::postPersist); 
 
        $insertionsForClass = []; 
 
        foreach ($this->entityInsertions as $oid => $entity) { 
            if ($this->em->getClassMetadata(get_class($entity))->name !== $className) { 
                continue; 
            } 
 
            $insertionsForClass[$oid] = $entity; 
 
            $persister->addInsert($entity); 
 
            unset($this->entityInsertions[$oid]); 
 
            if ($invoke !== ListenersInvoker::INVOKE_NONE) { 
                $entities[] = $entity; 
            } 
        } 
 
        $postInsertIds = $persister->executeInserts(); 
 
        if ($postInsertIds) { 
            // Persister returned post-insert IDs 
            foreach ($postInsertIds as $postInsertId) { 
                $idField = $class->getSingleIdentifierFieldName(); 
                $idValue = $this->convertSingleFieldIdentifierToPHPValue($class, $postInsertId['generatedId']); 
 
                $entity = $postInsertId['entity']; 
                $oid    = spl_object_id($entity); 
 
                $class->reflFields[$idField]->setValue($entity, $idValue); 
 
                $this->entityIdentifiers[$oid]            = [$idField => $idValue]; 
                $this->entityStates[$oid]                 = self::STATE_MANAGED; 
                $this->originalEntityData[$oid][$idField] = $idValue; 
 
                $this->addToIdentityMap($entity); 
            } 
        } else { 
            foreach ($insertionsForClass as $oid => $entity) { 
                if (! isset($this->entityIdentifiers[$oid])) { 
                    //entity was not added to identity map because some identifiers are foreign keys to new entities. 
                    //add it now 
                    $this->addToEntityIdentifiersAndEntityMap($class, $oid, $entity); 
                } 
            } 
        } 
 
        foreach ($entities as $entity) { 
            $this->listenersInvoker->invoke($class, Events::postPersist, $entity, new LifecycleEventArgs($entity, $this->em), $invoke); 
        } 
    } 
 
    /** 
     * @param object $entity 
     * @psalm-param ClassMetadata<T> $class 
     * @psalm-param T $entity 
     * 
     * @template T of object 
     */ 
    private function addToEntityIdentifiersAndEntityMap( 
        ClassMetadata $class, 
        int $oid, 
        $entity 
    ): void { 
        $identifier = []; 
 
        foreach ($class->getIdentifierFieldNames() as $idField) { 
            $origValue = $class->getFieldValue($entity, $idField); 
 
            $value = null; 
            if (isset($class->associationMappings[$idField])) { 
                // NOTE: Single Columns as associated identifiers only allowed - this constraint it is enforced. 
                $value = $this->getSingleIdentifierValue($origValue); 
            } 
 
            $identifier[$idField]                     = $value ?? $origValue; 
            $this->originalEntityData[$oid][$idField] = $origValue; 
        } 
 
        $this->entityStates[$oid]      = self::STATE_MANAGED; 
        $this->entityIdentifiers[$oid] = $identifier; 
 
        $this->addToIdentityMap($entity); 
    } 
 
    /** 
     * Executes all entity updates for entities of the specified type. 
     */ 
    private function executeUpdates(ClassMetadata $class): void 
    { 
        $className        = $class->name; 
        $persister        = $this->getEntityPersister($className); 
        $preUpdateInvoke  = $this->listenersInvoker->getSubscribedSystems($class, Events::preUpdate); 
        $postUpdateInvoke = $this->listenersInvoker->getSubscribedSystems($class, Events::postUpdate); 
 
        foreach ($this->entityUpdates as $oid => $entity) { 
            if ($this->em->getClassMetadata(get_class($entity))->name !== $className) { 
                continue; 
            } 
 
            if ($preUpdateInvoke !== ListenersInvoker::INVOKE_NONE) { 
                $this->listenersInvoker->invoke($class, Events::preUpdate, $entity, new PreUpdateEventArgs($entity, $this->em, $this->getEntityChangeSet($entity)), $preUpdateInvoke); 
 
                $this->recomputeSingleEntityChangeSet($class, $entity); 
            } 
 
            if (! empty($this->entityChangeSets[$oid])) { 
                $persister->update($entity); 
            } 
 
            unset($this->entityUpdates[$oid]); 
 
            if ($postUpdateInvoke !== ListenersInvoker::INVOKE_NONE) { 
                $this->listenersInvoker->invoke($class, Events::postUpdate, $entity, new LifecycleEventArgs($entity, $this->em), $postUpdateInvoke); 
            } 
        } 
    } 
 
    /** 
     * Executes all entity deletions for entities of the specified type. 
     */ 
    private function executeDeletions(ClassMetadata $class): void 
    { 
        $className = $class->name; 
        $persister = $this->getEntityPersister($className); 
        $invoke    = $this->listenersInvoker->getSubscribedSystems($class, Events::postRemove); 
 
        foreach ($this->entityDeletions as $oid => $entity) { 
            if ($this->em->getClassMetadata(get_class($entity))->name !== $className) { 
                continue; 
            } 
 
            $persister->delete($entity); 
 
            unset( 
                $this->entityDeletions[$oid], 
                $this->entityIdentifiers[$oid], 
                $this->originalEntityData[$oid], 
                $this->entityStates[$oid] 
            ); 
 
            // Entity with this $oid after deletion treated as NEW, even if the $oid 
            // is obtained by a new entity because the old one went out of scope. 
            //$this->entityStates[$oid] = self::STATE_NEW; 
            if (! $class->isIdentifierNatural()) { 
                $class->reflFields[$class->identifier[0]]->setValue($entity, null); 
            } 
 
            if ($invoke !== ListenersInvoker::INVOKE_NONE) { 
                $this->listenersInvoker->invoke($class, Events::postRemove, $entity, new LifecycleEventArgs($entity, $this->em), $invoke); 
            } 
        } 
    } 
 
    /** 
     * Gets the commit order. 
     * 
     * @return list<object> 
     */ 
    private function getCommitOrder(): array 
    { 
        $calc = $this->getCommitOrderCalculator(); 
 
        // See if there are any new classes in the changeset, that are not in the 
        // commit order graph yet (don't have a node). 
        // We have to inspect changeSet to be able to correctly build dependencies. 
        // It is not possible to use IdentityMap here because post inserted ids 
        // are not yet available. 
        $newNodes = []; 
 
        foreach (array_merge($this->entityInsertions, $this->entityUpdates, $this->entityDeletions) as $entity) { 
            $class = $this->em->getClassMetadata(get_class($entity)); 
 
            if ($calc->hasNode($class->name)) { 
                continue; 
            } 
 
            $calc->addNode($class->name, $class); 
 
            $newNodes[] = $class; 
        } 
 
        // Calculate dependencies for new nodes 
        while ($class = array_pop($newNodes)) { 
            foreach ($class->associationMappings as $assoc) { 
                if (! ($assoc['isOwningSide'] && $assoc['type'] & ClassMetadata::TO_ONE)) { 
                    continue; 
                } 
 
                $targetClass = $this->em->getClassMetadata($assoc['targetEntity']); 
 
                if (! $calc->hasNode($targetClass->name)) { 
                    $calc->addNode($targetClass->name, $targetClass); 
 
                    $newNodes[] = $targetClass; 
                } 
 
                $joinColumns = reset($assoc['joinColumns']); 
 
                $calc->addDependency($targetClass->name, $class->name, (int) empty($joinColumns['nullable'])); 
 
                // If the target class has mapped subclasses, these share the same dependency. 
                if (! $targetClass->subClasses) { 
                    continue; 
                } 
 
                foreach ($targetClass->subClasses as $subClassName) { 
                    $targetSubClass = $this->em->getClassMetadata($subClassName); 
 
                    if (! $calc->hasNode($subClassName)) { 
                        $calc->addNode($targetSubClass->name, $targetSubClass); 
 
                        $newNodes[] = $targetSubClass; 
                    } 
 
                    $calc->addDependency($targetSubClass->name, $class->name, 1); 
                } 
            } 
        } 
 
        return $calc->sort(); 
    } 
 
    /** 
     * Schedules an entity for insertion into the database. 
     * If the entity already has an identifier, it will be added to the identity map. 
     * 
     * @param object $entity The entity to schedule for insertion. 
     * 
     * @return void 
     * 
     * @throws ORMInvalidArgumentException 
     * @throws InvalidArgumentException 
     */ 
    public function scheduleForInsert($entity) 
    { 
        $oid = spl_object_id($entity); 
 
        if (isset($this->entityUpdates[$oid])) { 
            throw new InvalidArgumentException('Dirty entity can not be scheduled for insertion.'); 
        } 
 
        if (isset($this->entityDeletions[$oid])) { 
            throw ORMInvalidArgumentException::scheduleInsertForRemovedEntity($entity); 
        } 
 
        if (isset($this->originalEntityData[$oid]) && ! isset($this->entityInsertions[$oid])) { 
            throw ORMInvalidArgumentException::scheduleInsertForManagedEntity($entity); 
        } 
 
        if (isset($this->entityInsertions[$oid])) { 
            throw ORMInvalidArgumentException::scheduleInsertTwice($entity); 
        } 
 
        $this->entityInsertions[$oid] = $entity; 
 
        if (isset($this->entityIdentifiers[$oid])) { 
            $this->addToIdentityMap($entity); 
        } 
 
        if ($entity instanceof NotifyPropertyChanged) { 
            $entity->addPropertyChangedListener($this); 
        } 
    } 
 
    /** 
     * Checks whether an entity is scheduled for insertion. 
     * 
     * @param object $entity 
     * 
     * @return bool 
     */ 
    public function isScheduledForInsert($entity) 
    { 
        return isset($this->entityInsertions[spl_object_id($entity)]); 
    } 
 
    /** 
     * Schedules an entity for being updated. 
     * 
     * @param object $entity The entity to schedule for being updated. 
     * 
     * @return void 
     * 
     * @throws ORMInvalidArgumentException 
     */ 
    public function scheduleForUpdate($entity) 
    { 
        $oid = spl_object_id($entity); 
 
        if (! isset($this->entityIdentifiers[$oid])) { 
            throw ORMInvalidArgumentException::entityHasNoIdentity($entity, 'scheduling for update'); 
        } 
 
        if (isset($this->entityDeletions[$oid])) { 
            throw ORMInvalidArgumentException::entityIsRemoved($entity, 'schedule for update'); 
        } 
 
        if (! isset($this->entityUpdates[$oid]) && ! isset($this->entityInsertions[$oid])) { 
            $this->entityUpdates[$oid] = $entity; 
        } 
    } 
 
    /** 
     * INTERNAL: 
     * Schedules an extra update that will be executed immediately after the 
     * regular entity updates within the currently running commit cycle. 
     * 
     * Extra updates for entities are stored as (entity, changeset) tuples. 
     * 
     * @param object $entity The entity for which to schedule an extra update. 
     * @psalm-param array<string, array{mixed, mixed}>  $changeset The changeset of the entity (what to update). 
     * 
     * @return void 
     * 
     * @ignore 
     */ 
    public function scheduleExtraUpdate($entity, array $changeset) 
    { 
        $oid         = spl_object_id($entity); 
        $extraUpdate = [$entity, $changeset]; 
 
        if (isset($this->extraUpdates[$oid])) { 
            [, $changeset2] = $this->extraUpdates[$oid]; 
 
            $extraUpdate = [$entity, $changeset + $changeset2]; 
        } 
 
        $this->extraUpdates[$oid] = $extraUpdate; 
    } 
 
    /** 
     * Checks whether an entity is registered as dirty in the unit of work. 
     * Note: Is not very useful currently as dirty entities are only registered 
     * at commit time. 
     * 
     * @param object $entity 
     * 
     * @return bool 
     */ 
    public function isScheduledForUpdate($entity) 
    { 
        return isset($this->entityUpdates[spl_object_id($entity)]); 
    } 
 
    /** 
     * Checks whether an entity is registered to be checked in the unit of work. 
     * 
     * @param object $entity 
     * 
     * @return bool 
     */ 
    public function isScheduledForDirtyCheck($entity) 
    { 
        $rootEntityName = $this->em->getClassMetadata(get_class($entity))->rootEntityName; 
 
        return isset($this->scheduledForSynchronization[$rootEntityName][spl_object_id($entity)]); 
    } 
 
    /** 
     * INTERNAL: 
     * Schedules an entity for deletion. 
     * 
     * @param object $entity 
     * 
     * @return void 
     */ 
    public function scheduleForDelete($entity) 
    { 
        $oid = spl_object_id($entity); 
 
        if (isset($this->entityInsertions[$oid])) { 
            if ($this->isInIdentityMap($entity)) { 
                $this->removeFromIdentityMap($entity); 
            } 
 
            unset($this->entityInsertions[$oid], $this->entityStates[$oid]); 
 
            return; // entity has not been persisted yet, so nothing more to do. 
        } 
 
        if (! $this->isInIdentityMap($entity)) { 
            return; 
        } 
 
        $this->removeFromIdentityMap($entity); 
 
        unset($this->entityUpdates[$oid]); 
 
        if (! isset($this->entityDeletions[$oid])) { 
            $this->entityDeletions[$oid] = $entity; 
            $this->entityStates[$oid]    = self::STATE_REMOVED; 
        } 
    } 
 
    /** 
     * Checks whether an entity is registered as removed/deleted with the unit 
     * of work. 
     * 
     * @param object $entity 
     * 
     * @return bool 
     */ 
    public function isScheduledForDelete($entity) 
    { 
        return isset($this->entityDeletions[spl_object_id($entity)]); 
    } 
 
    /** 
     * Checks whether an entity is scheduled for insertion, update or deletion. 
     * 
     * @param object $entity 
     * 
     * @return bool 
     */ 
    public function isEntityScheduled($entity) 
    { 
        $oid = spl_object_id($entity); 
 
        return isset($this->entityInsertions[$oid]) 
            || isset($this->entityUpdates[$oid]) 
            || isset($this->entityDeletions[$oid]); 
    } 
 
    /** 
     * INTERNAL: 
     * Registers an entity in the identity map. 
     * Note that entities in a hierarchy are registered with the class name of 
     * the root entity. 
     * 
     * @param object $entity The entity to register. 
     * 
     * @return bool TRUE if the registration was successful, FALSE if the identity of 
     * the entity in question is already managed. 
     * 
     * @throws ORMInvalidArgumentException 
     * 
     * @ignore 
     */ 
    public function addToIdentityMap($entity) 
    { 
        $classMetadata = $this->em->getClassMetadata(get_class($entity)); 
        $identifier    = $this->entityIdentifiers[spl_object_id($entity)]; 
 
        if (empty($identifier) || in_array(null, $identifier, true)) { 
            throw ORMInvalidArgumentException::entityWithoutIdentity($classMetadata->name, $entity); 
        } 
 
        $idHash    = implode(' ', $identifier); 
        $className = $classMetadata->rootEntityName; 
 
        if (isset($this->identityMap[$className][$idHash])) { 
            return false; 
        } 
 
        $this->identityMap[$className][$idHash] = $entity; 
 
        return true; 
    } 
 
    /** 
     * Gets the state of an entity with regard to the current unit of work. 
     * 
     * @param object   $entity 
     * @param int|null $assume The state to assume if the state is not yet known (not MANAGED or REMOVED). 
     *                         This parameter can be set to improve performance of entity state detection 
     *                         by potentially avoiding a database lookup if the distinction between NEW and DETACHED 
     *                         is either known or does not matter for the caller of the method. 
     * @psalm-param self::STATE_*|null $assume 
     * 
     * @return int The entity state. 
     * @psalm-return self::STATE_* 
     */ 
    public function getEntityState($entity, $assume = null) 
    { 
        $oid = spl_object_id($entity); 
 
        if (isset($this->entityStates[$oid])) { 
            return $this->entityStates[$oid]; 
        } 
 
        if ($assume !== null) { 
            return $assume; 
        } 
 
        // State can only be NEW or DETACHED, because MANAGED/REMOVED states are known. 
        // Note that you can not remember the NEW or DETACHED state in _entityStates since 
        // the UoW does not hold references to such objects and the object hash can be reused. 
        // More generally because the state may "change" between NEW/DETACHED without the UoW being aware of it. 
        $class = $this->em->getClassMetadata(get_class($entity)); 
        $id    = $class->getIdentifierValues($entity); 
 
        if (! $id) { 
            return self::STATE_NEW; 
        } 
 
        if ($class->containsForeignIdentifier) { 
            $id = $this->identifierFlattener->flattenIdentifier($class, $id); 
        } 
 
        switch (true) { 
            case $class->isIdentifierNatural(): 
                // Check for a version field, if available, to avoid a db lookup. 
                if ($class->isVersioned) { 
                    return $class->getFieldValue($entity, $class->versionField) 
                        ? self::STATE_DETACHED 
                        : self::STATE_NEW; 
                } 
 
                // Last try before db lookup: check the identity map. 
                if ($this->tryGetById($id, $class->rootEntityName)) { 
                    return self::STATE_DETACHED; 
                } 
 
                // db lookup 
                if ($this->getEntityPersister($class->name)->exists($entity)) { 
                    return self::STATE_DETACHED; 
                } 
 
                return self::STATE_NEW; 
 
            case ! $class->idGenerator->isPostInsertGenerator(): 
                // if we have a pre insert generator we can't be sure that having an id 
                // really means that the entity exists. We have to verify this through 
                // the last resort: a db lookup 
 
                // Last try before db lookup: check the identity map. 
                if ($this->tryGetById($id, $class->rootEntityName)) { 
                    return self::STATE_DETACHED; 
                } 
 
                // db lookup 
                if ($this->getEntityPersister($class->name)->exists($entity)) { 
                    return self::STATE_DETACHED; 
                } 
 
                return self::STATE_NEW; 
 
            default: 
                return self::STATE_DETACHED; 
        } 
    } 
 
    /** 
     * INTERNAL: 
     * Removes an entity from the identity map. This effectively detaches the 
     * entity from the persistence management of Doctrine. 
     * 
     * @param object $entity 
     * 
     * @return bool 
     * 
     * @throws ORMInvalidArgumentException 
     * 
     * @ignore 
     */ 
    public function removeFromIdentityMap($entity) 
    { 
        $oid           = spl_object_id($entity); 
        $classMetadata = $this->em->getClassMetadata(get_class($entity)); 
        $idHash        = implode(' ', $this->entityIdentifiers[$oid]); 
 
        if ($idHash === '') { 
            throw ORMInvalidArgumentException::entityHasNoIdentity($entity, 'remove from identity map'); 
        } 
 
        $className = $classMetadata->rootEntityName; 
 
        if (isset($this->identityMap[$className][$idHash])) { 
            unset($this->identityMap[$className][$idHash], $this->readOnlyObjects[$oid]); 
 
            //$this->entityStates[$oid] = self::STATE_DETACHED; 
 
            return true; 
        } 
 
        return false; 
    } 
 
    /** 
     * INTERNAL: 
     * Gets an entity in the identity map by its identifier hash. 
     * 
     * @param string $idHash 
     * @param string $rootClassName 
     * 
     * @return object 
     * 
     * @ignore 
     */ 
    public function getByIdHash($idHash, $rootClassName) 
    { 
        return $this->identityMap[$rootClassName][$idHash]; 
    } 
 
    /** 
     * INTERNAL: 
     * Tries to get an entity by its identifier hash. If no entity is found for 
     * the given hash, FALSE is returned. 
     * 
     * @param mixed  $idHash        (must be possible to cast it to string) 
     * @param string $rootClassName 
     * 
     * @return false|object The found entity or FALSE. 
     * 
     * @ignore 
     */ 
    public function tryGetByIdHash($idHash, $rootClassName) 
    { 
        $stringIdHash = (string) $idHash; 
 
        return $this->identityMap[$rootClassName][$stringIdHash] ?? false; 
    } 
 
    /** 
     * Checks whether an entity is registered in the identity map of this UnitOfWork. 
     * 
     * @param object $entity 
     * 
     * @return bool 
     */ 
    public function isInIdentityMap($entity) 
    { 
        $oid = spl_object_id($entity); 
 
        if (empty($this->entityIdentifiers[$oid])) { 
            return false; 
        } 
 
        $classMetadata = $this->em->getClassMetadata(get_class($entity)); 
        $idHash        = implode(' ', $this->entityIdentifiers[$oid]); 
 
        return isset($this->identityMap[$classMetadata->rootEntityName][$idHash]); 
    } 
 
    /** 
     * INTERNAL: 
     * Checks whether an identifier hash exists in the identity map. 
     * 
     * @param string $idHash 
     * @param string $rootClassName 
     * 
     * @return bool 
     * 
     * @ignore 
     */ 
    public function containsIdHash($idHash, $rootClassName) 
    { 
        return isset($this->identityMap[$rootClassName][$idHash]); 
    } 
 
    /** 
     * Persists an entity as part of the current unit of work. 
     * 
     * @param object $entity The entity to persist. 
     * 
     * @return void 
     */ 
    public function persist($entity) 
    { 
        $visited = []; 
 
        $this->doPersist($entity, $visited); 
    } 
 
    /** 
     * Persists an entity as part of the current unit of work. 
     * 
     * This method is internally called during persist() cascades as it tracks 
     * the already visited entities to prevent infinite recursions. 
     * 
     * @param object $entity The entity to persist. 
     * @psalm-param array<int, object> $visited The already visited entities. 
     * 
     * @throws ORMInvalidArgumentException 
     * @throws UnexpectedValueException 
     */ 
    private function doPersist($entity, array &$visited): void 
    { 
        $oid = spl_object_id($entity); 
 
        if (isset($visited[$oid])) { 
            return; // Prevent infinite recursion 
        } 
 
        $visited[$oid] = $entity; // Mark visited 
 
        $class = $this->em->getClassMetadata(get_class($entity)); 
 
        // We assume NEW, so DETACHED entities result in an exception on flush (constraint violation). 
        // If we would detect DETACHED here we would throw an exception anyway with the same 
        // consequences (not recoverable/programming error), so just assuming NEW here 
        // lets us avoid some database lookups for entities with natural identifiers. 
        $entityState = $this->getEntityState($entity, self::STATE_NEW); 
 
        switch ($entityState) { 
            case self::STATE_MANAGED: 
                // Nothing to do, except if policy is "deferred explicit" 
                if ($class->isChangeTrackingDeferredExplicit()) { 
                    $this->scheduleForDirtyCheck($entity); 
                } 
 
                break; 
 
            case self::STATE_NEW: 
                $this->persistNew($class, $entity); 
                break; 
 
            case self::STATE_REMOVED: 
                // Entity becomes managed again 
                unset($this->entityDeletions[$oid]); 
                $this->addToIdentityMap($entity); 
 
                $this->entityStates[$oid] = self::STATE_MANAGED; 
 
                if ($class->isChangeTrackingDeferredExplicit()) { 
                    $this->scheduleForDirtyCheck($entity); 
                } 
 
                break; 
 
            case self::STATE_DETACHED: 
                // Can actually not happen right now since we assume STATE_NEW. 
                throw ORMInvalidArgumentException::detachedEntityCannot($entity, 'persisted'); 
 
            default: 
                throw new UnexpectedValueException(sprintf( 
                    'Unexpected entity state: %s. %s', 
                    $entityState, 
                    self::objToStr($entity) 
                )); 
        } 
 
        $this->cascadePersist($entity, $visited); 
    } 
 
    /** 
     * Deletes an entity as part of the current unit of work. 
     * 
     * @param object $entity The entity to remove. 
     * 
     * @return void 
     */ 
    public function remove($entity) 
    { 
        $visited = []; 
 
        $this->doRemove($entity, $visited); 
    } 
 
    /** 
     * Deletes an entity as part of the current unit of work. 
     * 
     * This method is internally called during delete() cascades as it tracks 
     * the already visited entities to prevent infinite recursions. 
     * 
     * @param object $entity The entity to delete. 
     * @psalm-param array<int, object> $visited The map of the already visited entities. 
     * 
     * @throws ORMInvalidArgumentException If the instance is a detached entity. 
     * @throws UnexpectedValueException 
     */ 
    private function doRemove($entity, array &$visited): void 
    { 
        $oid = spl_object_id($entity); 
 
        if (isset($visited[$oid])) { 
            return; // Prevent infinite recursion 
        } 
 
        $visited[$oid] = $entity; // mark visited 
 
        // Cascade first, because scheduleForDelete() removes the entity from the identity map, which 
        // can cause problems when a lazy proxy has to be initialized for the cascade operation. 
        $this->cascadeRemove($entity, $visited); 
 
        $class       = $this->em->getClassMetadata(get_class($entity)); 
        $entityState = $this->getEntityState($entity); 
 
        switch ($entityState) { 
            case self::STATE_NEW: 
            case self::STATE_REMOVED: 
                // nothing to do 
                break; 
 
            case self::STATE_MANAGED: 
                $invoke = $this->listenersInvoker->getSubscribedSystems($class, Events::preRemove); 
 
                if ($invoke !== ListenersInvoker::INVOKE_NONE) { 
                    $this->listenersInvoker->invoke($class, Events::preRemove, $entity, new LifecycleEventArgs($entity, $this->em), $invoke); 
                } 
 
                $this->scheduleForDelete($entity); 
                break; 
 
            case self::STATE_DETACHED: 
                throw ORMInvalidArgumentException::detachedEntityCannot($entity, 'removed'); 
 
            default: 
                throw new UnexpectedValueException(sprintf( 
                    'Unexpected entity state: %s. %s', 
                    $entityState, 
                    self::objToStr($entity) 
                )); 
        } 
    } 
 
    /** 
     * Merges the state of the given detached entity into this UnitOfWork. 
     * 
     * @deprecated 2.7 This method is being removed from the ORM and won't have any replacement 
     * 
     * @param object $entity 
     * 
     * @return object The managed copy of the entity. 
     * 
     * @throws OptimisticLockException If the entity uses optimistic locking through a version 
     *         attribute and the version check against the managed copy fails. 
     */ 
    public function merge($entity) 
    { 
        $visited = []; 
 
        return $this->doMerge($entity, $visited); 
    } 
 
    /** 
     * Executes a merge operation on an entity. 
     * 
     * @param object   $entity 
     * @param string[] $assoc 
     * @psalm-param array<int, object> $visited 
     * 
     * @return object The managed copy of the entity. 
     * 
     * @throws OptimisticLockException If the entity uses optimistic locking through a version 
     *         attribute and the version check against the managed copy fails. 
     * @throws ORMInvalidArgumentException If the entity instance is NEW. 
     * @throws EntityNotFoundException if an assigned identifier is used in the entity, but none is provided. 
     */ 
    private function doMerge( 
        $entity, 
        array &$visited, 
        $prevManagedCopy = null, 
        array $assoc = [] 
    ) { 
        $oid = spl_object_id($entity); 
 
        if (isset($visited[$oid])) { 
            $managedCopy = $visited[$oid]; 
 
            if ($prevManagedCopy !== null) { 
                $this->updateAssociationWithMergedEntity($entity, $assoc, $prevManagedCopy, $managedCopy); 
            } 
 
            return $managedCopy; 
        } 
 
        $class = $this->em->getClassMetadata(get_class($entity)); 
 
        // First we assume DETACHED, although it can still be NEW but we can avoid 
        // an extra db-roundtrip this way. If it is not MANAGED but has an identity, 
        // we need to fetch it from the db anyway in order to merge. 
        // MANAGED entities are ignored by the merge operation. 
        $managedCopy = $entity; 
 
        if ($this->getEntityState($entity, self::STATE_DETACHED) !== self::STATE_MANAGED) { 
            // Try to look the entity up in the identity map. 
            $id = $class->getIdentifierValues($entity); 
 
            // If there is no ID, it is actually NEW. 
            if (! $id) { 
                $managedCopy = $this->newInstance($class); 
 
                $this->mergeEntityStateIntoManagedCopy($entity, $managedCopy); 
                $this->persistNew($class, $managedCopy); 
            } else { 
                $flatId = $class->containsForeignIdentifier 
                    ? $this->identifierFlattener->flattenIdentifier($class, $id) 
                    : $id; 
 
                $managedCopy = $this->tryGetById($flatId, $class->rootEntityName); 
 
                if ($managedCopy) { 
                    // We have the entity in-memory already, just make sure its not removed. 
                    if ($this->getEntityState($managedCopy) === self::STATE_REMOVED) { 
                        throw ORMInvalidArgumentException::entityIsRemoved($managedCopy, 'merge'); 
                    } 
                } else { 
                    // We need to fetch the managed copy in order to merge. 
                    $managedCopy = $this->em->find($class->name, $flatId); 
                } 
 
                if ($managedCopy === null) { 
                    // If the identifier is ASSIGNED, it is NEW, otherwise an error 
                    // since the managed entity was not found. 
                    if (! $class->isIdentifierNatural()) { 
                        throw EntityNotFoundException::fromClassNameAndIdentifier( 
                            $class->getName(), 
                            $this->identifierFlattener->flattenIdentifier($class, $id) 
                        ); 
                    } 
 
                    $managedCopy = $this->newInstance($class); 
                    $class->setIdentifierValues($managedCopy, $id); 
 
                    $this->mergeEntityStateIntoManagedCopy($entity, $managedCopy); 
                    $this->persistNew($class, $managedCopy); 
                } else { 
                    $this->ensureVersionMatch($class, $entity, $managedCopy); 
                    $this->mergeEntityStateIntoManagedCopy($entity, $managedCopy); 
                } 
            } 
 
            $visited[$oid] = $managedCopy; // mark visited 
 
            if ($class->isChangeTrackingDeferredExplicit()) { 
                $this->scheduleForDirtyCheck($entity); 
            } 
        } 
 
        if ($prevManagedCopy !== null) { 
            $this->updateAssociationWithMergedEntity($entity, $assoc, $prevManagedCopy, $managedCopy); 
        } 
 
        // Mark the managed copy visited as well 
        $visited[spl_object_id($managedCopy)] = $managedCopy; 
 
        $this->cascadeMerge($entity, $managedCopy, $visited); 
 
        return $managedCopy; 
    } 
 
    /** 
     * @param object $entity 
     * @param object $managedCopy 
     * @psalm-param ClassMetadata<T> $class 
     * @psalm-param T $entity 
     * @psalm-param T $managedCopy 
     * 
     * @throws OptimisticLockException 
     * 
     * @template T of object 
     */ 
    private function ensureVersionMatch( 
        ClassMetadata $class, 
        $entity, 
        $managedCopy 
    ): void { 
        if (! ($class->isVersioned && $this->isLoaded($managedCopy) && $this->isLoaded($entity))) { 
            return; 
        } 
 
        $reflField          = $class->reflFields[$class->versionField]; 
        $managedCopyVersion = $reflField->getValue($managedCopy); 
        $entityVersion      = $reflField->getValue($entity); 
 
        // Throw exception if versions don't match. 
        // phpcs:ignore SlevomatCodingStandard.Operators.DisallowEqualOperators.DisallowedEqualOperator 
        if ($managedCopyVersion == $entityVersion) { 
            return; 
        } 
 
        throw OptimisticLockException::lockFailedVersionMismatch($entity, $entityVersion, $managedCopyVersion); 
    } 
 
    /** 
     * Tests if an entity is loaded - must either be a loaded proxy or not a proxy 
     * 
     * @param object $entity 
     */ 
    private function isLoaded($entity): bool 
    { 
        return ! ($entity instanceof Proxy) || $entity->__isInitialized(); 
    } 
 
    /** 
     * Sets/adds associated managed copies into the previous entity's association field 
     * 
     * @param object   $entity 
     * @param string[] $association 
     */ 
    private function updateAssociationWithMergedEntity( 
        $entity, 
        array $association, 
        $previousManagedCopy, 
        $managedCopy 
    ): void { 
        $assocField = $association['fieldName']; 
        $prevClass  = $this->em->getClassMetadata(get_class($previousManagedCopy)); 
 
        if ($association['type'] & ClassMetadata::TO_ONE) { 
            $prevClass->reflFields[$assocField]->setValue($previousManagedCopy, $managedCopy); 
 
            return; 
        } 
 
        $value   = $prevClass->reflFields[$assocField]->getValue($previousManagedCopy); 
        $value[] = $managedCopy; 
 
        if ($association['type'] === ClassMetadata::ONE_TO_MANY) { 
            $class = $this->em->getClassMetadata(get_class($entity)); 
 
            $class->reflFields[$association['mappedBy']]->setValue($managedCopy, $previousManagedCopy); 
        } 
    } 
 
    /** 
     * Detaches an entity from the persistence management. It's persistence will 
     * no longer be managed by Doctrine. 
     * 
     * @param object $entity The entity to detach. 
     * 
     * @return void 
     */ 
    public function detach($entity) 
    { 
        $visited = []; 
 
        $this->doDetach($entity, $visited); 
    } 
 
    /** 
     * Executes a detach operation on the given entity. 
     * 
     * @param object  $entity 
     * @param mixed[] $visited 
     * @param bool    $noCascade if true, don't cascade detach operation. 
     */ 
    private function doDetach( 
        $entity, 
        array &$visited, 
        bool $noCascade = false 
    ): void { 
        $oid = spl_object_id($entity); 
 
        if (isset($visited[$oid])) { 
            return; // Prevent infinite recursion 
        } 
 
        $visited[$oid] = $entity; // mark visited 
 
        switch ($this->getEntityState($entity, self::STATE_DETACHED)) { 
            case self::STATE_MANAGED: 
                if ($this->isInIdentityMap($entity)) { 
                    $this->removeFromIdentityMap($entity); 
                } 
 
                unset( 
                    $this->entityInsertions[$oid], 
                    $this->entityUpdates[$oid], 
                    $this->entityDeletions[$oid], 
                    $this->entityIdentifiers[$oid], 
                    $this->entityStates[$oid], 
                    $this->originalEntityData[$oid] 
                ); 
                break; 
            case self::STATE_NEW: 
            case self::STATE_DETACHED: 
                return; 
        } 
 
        if (! $noCascade) { 
            $this->cascadeDetach($entity, $visited); 
        } 
    } 
 
    /** 
     * Refreshes the state of the given entity from the database, overwriting 
     * any local, unpersisted changes. 
     * 
     * @param object $entity The entity to refresh. 
     * 
     * @return void 
     * 
     * @throws InvalidArgumentException If the entity is not MANAGED. 
     */ 
    public function refresh($entity) 
    { 
        $visited = []; 
 
        $this->doRefresh($entity, $visited); 
    } 
 
    /** 
     * Executes a refresh operation on an entity. 
     * 
     * @param object $entity The entity to refresh. 
     * @psalm-param array<int, object>  $visited The already visited entities during cascades. 
     * 
     * @throws ORMInvalidArgumentException If the entity is not MANAGED. 
     */ 
    private function doRefresh($entity, array &$visited): void 
    { 
        $oid = spl_object_id($entity); 
 
        if (isset($visited[$oid])) { 
            return; // Prevent infinite recursion 
        } 
 
        $visited[$oid] = $entity; // mark visited 
 
        $class = $this->em->getClassMetadata(get_class($entity)); 
 
        if ($this->getEntityState($entity) !== self::STATE_MANAGED) { 
            throw ORMInvalidArgumentException::entityNotManaged($entity); 
        } 
 
        $this->getEntityPersister($class->name)->refresh( 
            array_combine($class->getIdentifierFieldNames(), $this->entityIdentifiers[$oid]), 
            $entity 
        ); 
 
        $this->cascadeRefresh($entity, $visited); 
    } 
 
    /** 
     * Cascades a refresh operation to associated entities. 
     * 
     * @param object $entity 
     * @psalm-param array<int, object> $visited 
     */ 
    private function cascadeRefresh($entity, array &$visited): void 
    { 
        $class = $this->em->getClassMetadata(get_class($entity)); 
 
        $associationMappings = array_filter( 
            $class->associationMappings, 
            static function ($assoc) { 
                return $assoc['isCascadeRefresh']; 
            } 
        ); 
 
        foreach ($associationMappings as $assoc) { 
            $relatedEntities = $class->reflFields[$assoc['fieldName']]->getValue($entity); 
 
            switch (true) { 
                case $relatedEntities instanceof PersistentCollection: 
                    // Unwrap so that foreach() does not initialize 
                    $relatedEntities = $relatedEntities->unwrap(); 
                    // break; is commented intentionally! 
 
                case $relatedEntities instanceof Collection: 
                case is_array($relatedEntities): 
                    foreach ($relatedEntities as $relatedEntity) { 
                        $this->doRefresh($relatedEntity, $visited); 
                    } 
 
                    break; 
 
                case $relatedEntities !== null: 
                    $this->doRefresh($relatedEntities, $visited); 
                    break; 
 
                default: 
                    // Do nothing 
            } 
        } 
    } 
 
    /** 
     * Cascades a detach operation to associated entities. 
     * 
     * @param object             $entity 
     * @param array<int, object> $visited 
     */ 
    private function cascadeDetach($entity, array &$visited): void 
    { 
        $class = $this->em->getClassMetadata(get_class($entity)); 
 
        $associationMappings = array_filter( 
            $class->associationMappings, 
            static function ($assoc) { 
                return $assoc['isCascadeDetach']; 
            } 
        ); 
 
        foreach ($associationMappings as $assoc) { 
            $relatedEntities = $class->reflFields[$assoc['fieldName']]->getValue($entity); 
 
            switch (true) { 
                case $relatedEntities instanceof PersistentCollection: 
                    // Unwrap so that foreach() does not initialize 
                    $relatedEntities = $relatedEntities->unwrap(); 
                    // break; is commented intentionally! 
 
                case $relatedEntities instanceof Collection: 
                case is_array($relatedEntities): 
                    foreach ($relatedEntities as $relatedEntity) { 
                        $this->doDetach($relatedEntity, $visited); 
                    } 
 
                    break; 
 
                case $relatedEntities !== null: 
                    $this->doDetach($relatedEntities, $visited); 
                    break; 
 
                default: 
                    // Do nothing 
            } 
        } 
    } 
 
    /** 
     * Cascades a merge operation to associated entities. 
     * 
     * @param object $entity 
     * @param object $managedCopy 
     * @psalm-param array<int, object> $visited 
     */ 
    private function cascadeMerge($entity, $managedCopy, array &$visited): void 
    { 
        $class = $this->em->getClassMetadata(get_class($entity)); 
 
        $associationMappings = array_filter( 
            $class->associationMappings, 
            static function ($assoc) { 
                return $assoc['isCascadeMerge']; 
            } 
        ); 
 
        foreach ($associationMappings as $assoc) { 
            $relatedEntities = $class->reflFields[$assoc['fieldName']]->getValue($entity); 
 
            if ($relatedEntities instanceof Collection) { 
                if ($relatedEntities === $class->reflFields[$assoc['fieldName']]->getValue($managedCopy)) { 
                    continue; 
                } 
 
                if ($relatedEntities instanceof PersistentCollection) { 
                    // Unwrap so that foreach() does not initialize 
                    $relatedEntities = $relatedEntities->unwrap(); 
                } 
 
                foreach ($relatedEntities as $relatedEntity) { 
                    $this->doMerge($relatedEntity, $visited, $managedCopy, $assoc); 
                } 
            } elseif ($relatedEntities !== null) { 
                $this->doMerge($relatedEntities, $visited, $managedCopy, $assoc); 
            } 
        } 
    } 
 
    /** 
     * Cascades the save operation to associated entities. 
     * 
     * @param object $entity 
     * @psalm-param array<int, object> $visited 
     */ 
    private function cascadePersist($entity, array &$visited): void 
    { 
        $class = $this->em->getClassMetadata(get_class($entity)); 
 
        $associationMappings = array_filter( 
            $class->associationMappings, 
            static function ($assoc) { 
                return $assoc['isCascadePersist']; 
            } 
        ); 
 
        foreach ($associationMappings as $assoc) { 
            $relatedEntities = $class->reflFields[$assoc['fieldName']]->getValue($entity); 
 
            switch (true) { 
                case $relatedEntities instanceof PersistentCollection: 
                    // Unwrap so that foreach() does not initialize 
                    $relatedEntities = $relatedEntities->unwrap(); 
                    // break; is commented intentionally! 
 
                case $relatedEntities instanceof Collection: 
                case is_array($relatedEntities): 
                    if (($assoc['type'] & ClassMetadata::TO_MANY) <= 0) { 
                        throw ORMInvalidArgumentException::invalidAssociation( 
                            $this->em->getClassMetadata($assoc['targetEntity']), 
                            $assoc, 
                            $relatedEntities 
                        ); 
                    } 
 
                    foreach ($relatedEntities as $relatedEntity) { 
                        $this->doPersist($relatedEntity, $visited); 
                    } 
 
                    break; 
 
                case $relatedEntities !== null: 
                    if (! $relatedEntities instanceof $assoc['targetEntity']) { 
                        throw ORMInvalidArgumentException::invalidAssociation( 
                            $this->em->getClassMetadata($assoc['targetEntity']), 
                            $assoc, 
                            $relatedEntities 
                        ); 
                    } 
 
                    $this->doPersist($relatedEntities, $visited); 
                    break; 
 
                default: 
                    // Do nothing 
            } 
        } 
    } 
 
    /** 
     * Cascades the delete operation to associated entities. 
     * 
     * @param object $entity 
     * @psalm-param array<int, object> $visited 
     */ 
    private function cascadeRemove($entity, array &$visited): void 
    { 
        $class = $this->em->getClassMetadata(get_class($entity)); 
 
        $associationMappings = array_filter( 
            $class->associationMappings, 
            static function ($assoc) { 
                return $assoc['isCascadeRemove']; 
            } 
        ); 
 
        $entitiesToCascade = []; 
 
        foreach ($associationMappings as $assoc) { 
            if ($entity instanceof Proxy && ! $entity->__isInitialized()) { 
                $entity->__load(); 
            } 
 
            $relatedEntities = $class->reflFields[$assoc['fieldName']]->getValue($entity); 
 
            switch (true) { 
                case $relatedEntities instanceof Collection: 
                case is_array($relatedEntities): 
                    // If its a PersistentCollection initialization is intended! No unwrap! 
                    foreach ($relatedEntities as $relatedEntity) { 
                        $entitiesToCascade[] = $relatedEntity; 
                    } 
 
                    break; 
 
                case $relatedEntities !== null: 
                    $entitiesToCascade[] = $relatedEntities; 
                    break; 
 
                default: 
                    // Do nothing 
            } 
        } 
 
        foreach ($entitiesToCascade as $relatedEntity) { 
            $this->doRemove($relatedEntity, $visited); 
        } 
    } 
 
    /** 
     * Acquire a lock on the given entity. 
     * 
     * @param object                     $entity 
     * @param int|DateTimeInterface|null $lockVersion 
     * @psalm-param LockMode::* $lockMode 
     * 
     * @throws ORMInvalidArgumentException 
     * @throws TransactionRequiredException 
     * @throws OptimisticLockException 
     */ 
    public function lock($entity, int $lockMode, $lockVersion = null): void 
    { 
        if ($this->getEntityState($entity, self::STATE_DETACHED) !== self::STATE_MANAGED) { 
            throw ORMInvalidArgumentException::entityNotManaged($entity); 
        } 
 
        $class = $this->em->getClassMetadata(get_class($entity)); 
 
        switch (true) { 
            case $lockMode === LockMode::OPTIMISTIC: 
                if (! $class->isVersioned) { 
                    throw OptimisticLockException::notVersioned($class->name); 
                } 
 
                if ($lockVersion === null) { 
                    return; 
                } 
 
                if ($entity instanceof Proxy && ! $entity->__isInitialized()) { 
                    $entity->__load(); 
                } 
 
                $entityVersion = $class->reflFields[$class->versionField]->getValue($entity); 
 
                // phpcs:ignore SlevomatCodingStandard.Operators.DisallowEqualOperators.DisallowedNotEqualOperator 
                if ($entityVersion != $lockVersion) { 
                    throw OptimisticLockException::lockFailedVersionMismatch($entity, $lockVersion, $entityVersion); 
                } 
 
                break; 
 
            case $lockMode === LockMode::NONE: 
            case $lockMode === LockMode::PESSIMISTIC_READ: 
            case $lockMode === LockMode::PESSIMISTIC_WRITE: 
                if (! $this->em->getConnection()->isTransactionActive()) { 
                    throw TransactionRequiredException::transactionRequired(); 
                } 
 
                $oid = spl_object_id($entity); 
 
                $this->getEntityPersister($class->name)->lock( 
                    array_combine($class->getIdentifierFieldNames(), $this->entityIdentifiers[$oid]), 
                    $lockMode 
                ); 
                break; 
 
            default: 
                // Do nothing 
        } 
    } 
 
    /** 
     * Gets the CommitOrderCalculator used by the UnitOfWork to order commits. 
     * 
     * @return CommitOrderCalculator 
     */ 
    public function getCommitOrderCalculator() 
    { 
        return new Internal\CommitOrderCalculator(); 
    } 
 
    /** 
     * Clears the UnitOfWork. 
     * 
     * @param string|null $entityName if given, only entities of this type will get detached. 
     * 
     * @return void 
     * 
     * @throws ORMInvalidArgumentException if an invalid entity name is given. 
     */ 
    public function clear($entityName = null) 
    { 
        if ($entityName === null) { 
            $this->identityMap                    = 
            $this->entityIdentifiers              = 
            $this->originalEntityData             = 
            $this->entityChangeSets               = 
            $this->entityStates                   = 
            $this->scheduledForSynchronization    = 
            $this->entityInsertions               = 
            $this->entityUpdates                  = 
            $this->entityDeletions                = 
            $this->nonCascadedNewDetectedEntities = 
            $this->collectionDeletions            = 
            $this->collectionUpdates              = 
            $this->extraUpdates                   = 
            $this->readOnlyObjects                = 
            $this->visitedCollections             = 
            $this->eagerLoadingEntities           = 
            $this->orphanRemovals                 = []; 
        } else { 
            Deprecation::triggerIfCalledFromOutside( 
                'doctrine/orm', 
                'https://github.com/doctrine/orm/issues/8460', 
                'Calling %s() with any arguments to clear specific entities is deprecated and will not be supported in Doctrine ORM 3.0.', 
                __METHOD__ 
            ); 
 
            $this->clearIdentityMapForEntityName($entityName); 
            $this->clearEntityInsertionsForEntityName($entityName); 
        } 
 
        if ($this->evm->hasListeners(Events::onClear)) { 
            $this->evm->dispatchEvent(Events::onClear, new Event\OnClearEventArgs($this->em, $entityName)); 
        } 
    } 
 
    /** 
     * INTERNAL: 
     * Schedules an orphaned entity for removal. The remove() operation will be 
     * invoked on that entity at the beginning of the next commit of this 
     * UnitOfWork. 
     * 
     * @param object $entity 
     * 
     * @return void 
     * 
     * @ignore 
     */ 
    public function scheduleOrphanRemoval($entity) 
    { 
        $this->orphanRemovals[spl_object_id($entity)] = $entity; 
    } 
 
    /** 
     * INTERNAL: 
     * Cancels a previously scheduled orphan removal. 
     * 
     * @param object $entity 
     * 
     * @return void 
     * 
     * @ignore 
     */ 
    public function cancelOrphanRemoval($entity) 
    { 
        unset($this->orphanRemovals[spl_object_id($entity)]); 
    } 
 
    /** 
     * INTERNAL: 
     * Schedules a complete collection for removal when this UnitOfWork commits. 
     * 
     * @return void 
     */ 
    public function scheduleCollectionDeletion(PersistentCollection $coll) 
    { 
        $coid = spl_object_id($coll); 
 
        // TODO: if $coll is already scheduled for recreation ... what to do? 
        // Just remove $coll from the scheduled recreations? 
        unset($this->collectionUpdates[$coid]); 
 
        $this->collectionDeletions[$coid] = $coll; 
    } 
 
    /** 
     * @return bool 
     */ 
    public function isCollectionScheduledForDeletion(PersistentCollection $coll) 
    { 
        return isset($this->collectionDeletions[spl_object_id($coll)]); 
    } 
 
    /** 
     * @return object 
     */ 
    private function newInstance(ClassMetadata $class) 
    { 
        $entity = $class->newInstance(); 
 
        if ($entity instanceof ObjectManagerAware) { 
            $entity->injectObjectManager($this->em, $class); 
        } 
 
        return $entity; 
    } 
 
    /** 
     * INTERNAL: 
     * Creates an entity. Used for reconstitution of persistent entities. 
     * 
     * Internal note: Highly performance-sensitive method. 
     * 
     * @param string  $className The name of the entity class. 
     * @param mixed[] $data      The data for the entity. 
     * @param mixed[] $hints     Any hints to account for during reconstitution/lookup of the entity. 
     * @psalm-param class-string $className 
     * @psalm-param array<string, mixed> $hints 
     * 
     * @return object The managed entity instance. 
     * 
     * @ignore 
     * @todo Rename: getOrCreateEntity 
     */ 
    public function createEntity($className, array $data, &$hints = []) 
    { 
        $class = $this->em->getClassMetadata($className); 
 
        $id     = $this->identifierFlattener->flattenIdentifier($class, $data); 
        $idHash = implode(' ', $id); 
 
        if (isset($this->identityMap[$class->rootEntityName][$idHash])) { 
            $entity = $this->identityMap[$class->rootEntityName][$idHash]; 
            $oid    = spl_object_id($entity); 
 
            if ( 
                isset($hints[Query::HINT_REFRESH], $hints[Query::HINT_REFRESH_ENTITY]) 
            ) { 
                $unmanagedProxy = $hints[Query::HINT_REFRESH_ENTITY]; 
                if ( 
                    $unmanagedProxy !== $entity 
                    && $unmanagedProxy instanceof Proxy 
                    && $this->isIdentifierEquals($unmanagedProxy, $entity) 
                ) { 
                    // DDC-1238 - we have a managed instance, but it isn't the provided one. 
                    // Therefore we clear its identifier. Also, we must re-fetch metadata since the 
                    // refreshed object may be anything 
 
                    foreach ($class->identifier as $fieldName) { 
                        $class->reflFields[$fieldName]->setValue($unmanagedProxy, null); 
                    } 
 
                    return $unmanagedProxy; 
                } 
            } 
 
            if ($entity instanceof Proxy && ! $entity->__isInitialized()) { 
                $entity->__setInitialized(true); 
 
                if ($entity instanceof NotifyPropertyChanged) { 
                    $entity->addPropertyChangedListener($this); 
                } 
            } else { 
                if ( 
                    ! isset($hints[Query::HINT_REFRESH]) 
                    || (isset($hints[Query::HINT_REFRESH_ENTITY]) && $hints[Query::HINT_REFRESH_ENTITY] !== $entity) 
                ) { 
                    return $entity; 
                } 
            } 
 
            // inject ObjectManager upon refresh. 
            if ($entity instanceof ObjectManagerAware) { 
                $entity->injectObjectManager($this->em, $class); 
            } 
 
            $this->originalEntityData[$oid] = $data; 
        } else { 
            $entity = $this->newInstance($class); 
            $oid    = spl_object_id($entity); 
 
            $this->entityIdentifiers[$oid]  = $id; 
            $this->entityStates[$oid]       = self::STATE_MANAGED; 
            $this->originalEntityData[$oid] = $data; 
 
            $this->identityMap[$class->rootEntityName][$idHash] = $entity; 
 
            if ($entity instanceof NotifyPropertyChanged) { 
                $entity->addPropertyChangedListener($this); 
            } 
 
            if (isset($hints[Query::HINT_READ_ONLY])) { 
                $this->readOnlyObjects[$oid] = true; 
            } 
        } 
 
        foreach ($data as $field => $value) { 
            if (isset($class->fieldMappings[$field])) { 
                $class->reflFields[$field]->setValue($entity, $value); 
            } 
        } 
 
        // Loading the entity right here, if its in the eager loading map get rid of it there. 
        unset($this->eagerLoadingEntities[$class->rootEntityName][$idHash]); 
 
        if (isset($this->eagerLoadingEntities[$class->rootEntityName]) && ! $this->eagerLoadingEntities[$class->rootEntityName]) { 
            unset($this->eagerLoadingEntities[$class->rootEntityName]); 
        } 
 
        // Properly initialize any unfetched associations, if partial objects are not allowed. 
        if (isset($hints[Query::HINT_FORCE_PARTIAL_LOAD])) { 
            Deprecation::trigger( 
                'doctrine/orm', 
                'https://github.com/doctrine/orm/issues/8471', 
                'Partial Objects are deprecated (here entity %s)', 
                $className 
            ); 
 
            return $entity; 
        } 
 
        foreach ($class->associationMappings as $field => $assoc) { 
            // Check if the association is not among the fetch-joined associations already. 
            if (isset($hints['fetchAlias'], $hints['fetched'][$hints['fetchAlias']][$field])) { 
                continue; 
            } 
 
            $targetClass = $this->em->getClassMetadata($assoc['targetEntity']); 
 
            switch (true) { 
                case $assoc['type'] & ClassMetadata::TO_ONE: 
                    if (! $assoc['isOwningSide']) { 
                        // use the given entity association 
                        if (isset($data[$field]) && is_object($data[$field]) && isset($this->entityStates[spl_object_id($data[$field])])) { 
                            $this->originalEntityData[$oid][$field] = $data[$field]; 
 
                            $class->reflFields[$field]->setValue($entity, $data[$field]); 
                            $targetClass->reflFields[$assoc['mappedBy']]->setValue($data[$field], $entity); 
 
                            continue 2; 
                        } 
 
                        // Inverse side of x-to-one can never be lazy 
                        $class->reflFields[$field]->setValue($entity, $this->getEntityPersister($assoc['targetEntity'])->loadOneToOneEntity($assoc, $entity)); 
 
                        continue 2; 
                    } 
 
                    // use the entity association 
                    if (isset($data[$field]) && is_object($data[$field]) && isset($this->entityStates[spl_object_id($data[$field])])) { 
                        $class->reflFields[$field]->setValue($entity, $data[$field]); 
                        $this->originalEntityData[$oid][$field] = $data[$field]; 
 
                        break; 
                    } 
 
                    $associatedId = []; 
 
                    // TODO: Is this even computed right in all cases of composite keys? 
                    foreach ($assoc['targetToSourceKeyColumns'] as $targetColumn => $srcColumn) { 
                        $joinColumnValue = $data[$srcColumn] ?? null; 
 
                        if ($joinColumnValue !== null) { 
                            if ($targetClass->containsForeignIdentifier) { 
                                $associatedId[$targetClass->getFieldForColumn($targetColumn)] = $joinColumnValue; 
                            } else { 
                                $associatedId[$targetClass->fieldNames[$targetColumn]] = $joinColumnValue; 
                            } 
                        } elseif ( 
                            $targetClass->containsForeignIdentifier 
                            && in_array($targetClass->getFieldForColumn($targetColumn), $targetClass->identifier, true) 
                        ) { 
                            // the missing key is part of target's entity primary key 
                            $associatedId = []; 
                            break; 
                        } 
                    } 
 
                    if (! $associatedId) { 
                        // Foreign key is NULL 
                        $class->reflFields[$field]->setValue($entity, null); 
                        $this->originalEntityData[$oid][$field] = null; 
 
                        break; 
                    } 
 
                    if (! isset($hints['fetchMode'][$class->name][$field])) { 
                        $hints['fetchMode'][$class->name][$field] = $assoc['fetch']; 
                    } 
 
                    // Foreign key is set 
                    // Check identity map first 
                    // FIXME: Can break easily with composite keys if join column values are in 
                    //        wrong order. The correct order is the one in ClassMetadata#identifier. 
                    $relatedIdHash = implode(' ', $associatedId); 
 
                    switch (true) { 
                        case isset($this->identityMap[$targetClass->rootEntityName][$relatedIdHash]): 
                            $newValue = $this->identityMap[$targetClass->rootEntityName][$relatedIdHash]; 
 
                            // If this is an uninitialized proxy, we are deferring eager loads, 
                            // this association is marked as eager fetch, and its an uninitialized proxy (wtf!) 
                            // then we can append this entity for eager loading! 
                            if ( 
                                $hints['fetchMode'][$class->name][$field] === ClassMetadata::FETCH_EAGER && 
                                isset($hints[self::HINT_DEFEREAGERLOAD]) && 
                                ! $targetClass->isIdentifierComposite && 
                                $newValue instanceof Proxy && 
                                $newValue->__isInitialized() === false 
                            ) { 
                                $this->eagerLoadingEntities[$targetClass->rootEntityName][$relatedIdHash] = current($associatedId); 
                            } 
 
                            break; 
 
                        case $targetClass->subClasses: 
                            // If it might be a subtype, it can not be lazy. There isn't even 
                            // a way to solve this with deferred eager loading, which means putting 
                            // an entity with subclasses at a *-to-one location is really bad! (performance-wise) 
                            $newValue = $this->getEntityPersister($assoc['targetEntity'])->loadOneToOneEntity($assoc, $entity, $associatedId); 
                            break; 
 
                        default: 
                            switch (true) { 
                                // We are negating the condition here. Other cases will assume it is valid! 
                                case $hints['fetchMode'][$class->name][$field] !== ClassMetadata::FETCH_EAGER: 
                                    $newValue = $this->em->getProxyFactory()->getProxy($assoc['targetEntity'], $associatedId); 
                                    break; 
 
                                // Deferred eager load only works for single identifier classes 
                                case isset($hints[self::HINT_DEFEREAGERLOAD]) && ! $targetClass->isIdentifierComposite: 
                                    // TODO: Is there a faster approach? 
                                    $this->eagerLoadingEntities[$targetClass->rootEntityName][$relatedIdHash] = current($associatedId); 
 
                                    $newValue = $this->em->getProxyFactory()->getProxy($assoc['targetEntity'], $associatedId); 
                                    break; 
 
                                default: 
                                    // TODO: This is very imperformant, ignore it? 
                                    $newValue = $this->em->find($assoc['targetEntity'], $associatedId); 
                                    break; 
                            } 
 
                            if ($newValue === null) { 
                                break; 
                            } 
 
                            // PERF: Inlined & optimized code from UnitOfWork#registerManaged() 
                            $newValueOid                                                     = spl_object_id($newValue); 
                            $this->entityIdentifiers[$newValueOid]                           = $associatedId; 
                            $this->identityMap[$targetClass->rootEntityName][$relatedIdHash] = $newValue; 
 
                            if ( 
                                $newValue instanceof NotifyPropertyChanged && 
                                ( ! $newValue instanceof Proxy || $newValue->__isInitialized()) 
                            ) { 
                                $newValue->addPropertyChangedListener($this); 
                            } 
 
                            $this->entityStates[$newValueOid] = self::STATE_MANAGED; 
                            // make sure that when an proxy is then finally loaded, $this->originalEntityData is set also! 
                            break; 
                    } 
 
                    $this->originalEntityData[$oid][$field] = $newValue; 
                    $class->reflFields[$field]->setValue($entity, $newValue); 
 
                    if ($assoc['inversedBy'] && $assoc['type'] & ClassMetadata::ONE_TO_ONE && $newValue !== null) { 
                        $inverseAssoc = $targetClass->associationMappings[$assoc['inversedBy']]; 
                        $targetClass->reflFields[$inverseAssoc['fieldName']]->setValue($newValue, $entity); 
                    } 
 
                    break; 
 
                default: 
                    // Ignore if its a cached collection 
                    if (isset($hints[Query::HINT_CACHE_ENABLED]) && $class->getFieldValue($entity, $field) instanceof PersistentCollection) { 
                        break; 
                    } 
 
                    // use the given collection 
                    if (isset($data[$field]) && $data[$field] instanceof PersistentCollection) { 
                        $data[$field]->setOwner($entity, $assoc); 
 
                        $class->reflFields[$field]->setValue($entity, $data[$field]); 
                        $this->originalEntityData[$oid][$field] = $data[$field]; 
 
                        break; 
                    } 
 
                    // Inject collection 
                    $pColl = new PersistentCollection($this->em, $targetClass, new ArrayCollection()); 
                    $pColl->setOwner($entity, $assoc); 
                    $pColl->setInitialized(false); 
 
                    $reflField = $class->reflFields[$field]; 
                    $reflField->setValue($entity, $pColl); 
 
                    if ($assoc['fetch'] === ClassMetadata::FETCH_EAGER) { 
                        $this->loadCollection($pColl); 
                        $pColl->takeSnapshot(); 
                    } 
 
                    $this->originalEntityData[$oid][$field] = $pColl; 
                    break; 
            } 
        } 
 
        // defer invoking of postLoad event to hydration complete step 
        $this->hydrationCompleteHandler->deferPostLoadInvoking($class, $entity); 
 
        return $entity; 
    } 
 
    /** 
     * @return void 
     */ 
    public function triggerEagerLoads() 
    { 
        if (! $this->eagerLoadingEntities) { 
            return; 
        } 
 
        // avoid infinite recursion 
        $eagerLoadingEntities       = $this->eagerLoadingEntities; 
        $this->eagerLoadingEntities = []; 
 
        foreach ($eagerLoadingEntities as $entityName => $ids) { 
            if (! $ids) { 
                continue; 
            } 
 
            $class = $this->em->getClassMetadata($entityName); 
 
            $this->getEntityPersister($entityName)->loadAll( 
                array_combine($class->identifier, [array_values($ids)]) 
            ); 
        } 
    } 
 
    /** 
     * Initializes (loads) an uninitialized persistent collection of an entity. 
     * 
     * @param PersistentCollection $collection The collection to initialize. 
     * 
     * @return void 
     * 
     * @todo Maybe later move to EntityManager#initialize($proxyOrCollection). See DDC-733. 
     */ 
    public function loadCollection(PersistentCollection $collection) 
    { 
        $assoc     = $collection->getMapping(); 
        $persister = $this->getEntityPersister($assoc['targetEntity']); 
 
        switch ($assoc['type']) { 
            case ClassMetadata::ONE_TO_MANY: 
                $persister->loadOneToManyCollection($assoc, $collection->getOwner(), $collection); 
                break; 
 
            case ClassMetadata::MANY_TO_MANY: 
                $persister->loadManyToManyCollection($assoc, $collection->getOwner(), $collection); 
                break; 
        } 
 
        $collection->setInitialized(true); 
    } 
 
    /** 
     * Gets the identity map of the UnitOfWork. 
     * 
     * @psalm-return array<class-string, array<string, object|null>> 
     */ 
    public function getIdentityMap() 
    { 
        return $this->identityMap; 
    } 
 
    /** 
     * Gets the original data of an entity. The original data is the data that was 
     * present at the time the entity was reconstituted from the database. 
     * 
     * @param object $entity 
     * 
     * @return mixed[] 
     * @psalm-return array<string, mixed> 
     */ 
    public function getOriginalEntityData($entity) 
    { 
        $oid = spl_object_id($entity); 
 
        return $this->originalEntityData[$oid] ?? []; 
    } 
 
    /** 
     * @param object  $entity 
     * @param mixed[] $data 
     * 
     * @return void 
     * 
     * @ignore 
     */ 
    public function setOriginalEntityData($entity, array $data) 
    { 
        $this->originalEntityData[spl_object_id($entity)] = $data; 
    } 
 
    /** 
     * INTERNAL: 
     * Sets a property value of the original data array of an entity. 
     * 
     * @param int    $oid 
     * @param string $property 
     * @param mixed  $value 
     * 
     * @return void 
     * 
     * @ignore 
     */ 
    public function setOriginalEntityProperty($oid, $property, $value) 
    { 
        $this->originalEntityData[$oid][$property] = $value; 
    } 
 
    /** 
     * Gets the identifier of an entity. 
     * The returned value is always an array of identifier values. If the entity 
     * has a composite identifier then the identifier values are in the same 
     * order as the identifier field names as returned by ClassMetadata#getIdentifierFieldNames(). 
     * 
     * @param object $entity 
     * 
     * @return mixed[] The identifier values. 
     */ 
    public function getEntityIdentifier($entity) 
    { 
        if (! isset($this->entityIdentifiers[spl_object_id($entity)])) { 
            throw EntityNotFoundException::noIdentifierFound(get_debug_type($entity)); 
        } 
 
        return $this->entityIdentifiers[spl_object_id($entity)]; 
    } 
 
    /** 
     * Processes an entity instance to extract their identifier values. 
     * 
     * @param object $entity The entity instance. 
     * 
     * @return mixed A scalar value. 
     * 
     * @throws ORMInvalidArgumentException 
     */ 
    public function getSingleIdentifierValue($entity) 
    { 
        $class = $this->em->getClassMetadata(get_class($entity)); 
 
        if ($class->isIdentifierComposite) { 
            throw ORMInvalidArgumentException::invalidCompositeIdentifier(); 
        } 
 
        $values = $this->isInIdentityMap($entity) 
            ? $this->getEntityIdentifier($entity) 
            : $class->getIdentifierValues($entity); 
 
        return $values[$class->identifier[0]] ?? null; 
    } 
 
    /** 
     * Tries to find an entity with the given identifier in the identity map of 
     * this UnitOfWork. 
     * 
     * @param mixed  $id            The entity identifier to look for. 
     * @param string $rootClassName The name of the root class of the mapped entity hierarchy. 
     * @psalm-param class-string $rootClassName 
     * 
     * @return object|false Returns the entity with the specified identifier if it exists in 
     *                      this UnitOfWork, FALSE otherwise. 
     */ 
    public function tryGetById($id, $rootClassName) 
    { 
        $idHash = implode(' ', (array) $id); 
 
        return $this->identityMap[$rootClassName][$idHash] ?? false; 
    } 
 
    /** 
     * Schedules an entity for dirty-checking at commit-time. 
     * 
     * @param object $entity The entity to schedule for dirty-checking. 
     * 
     * @return void 
     * 
     * @todo Rename: scheduleForSynchronization 
     */ 
    public function scheduleForDirtyCheck($entity) 
    { 
        $rootClassName = $this->em->getClassMetadata(get_class($entity))->rootEntityName; 
 
        $this->scheduledForSynchronization[$rootClassName][spl_object_id($entity)] = $entity; 
    } 
 
    /** 
     * Checks whether the UnitOfWork has any pending insertions. 
     * 
     * @return bool TRUE if this UnitOfWork has pending insertions, FALSE otherwise. 
     */ 
    public function hasPendingInsertions() 
    { 
        return ! empty($this->entityInsertions); 
    } 
 
    /** 
     * Calculates the size of the UnitOfWork. The size of the UnitOfWork is the 
     * number of entities in the identity map. 
     * 
     * @return int 
     */ 
    public function size() 
    { 
        return array_sum(array_map('count', $this->identityMap)); 
    } 
 
    /** 
     * Gets the EntityPersister for an Entity. 
     * 
     * @param string $entityName The name of the Entity. 
     * @psalm-param class-string $entityName 
     * 
     * @return EntityPersister 
     */ 
    public function getEntityPersister($entityName) 
    { 
        if (isset($this->persisters[$entityName])) { 
            return $this->persisters[$entityName]; 
        } 
 
        $class = $this->em->getClassMetadata($entityName); 
 
        switch (true) { 
            case $class->isInheritanceTypeNone(): 
                $persister = new BasicEntityPersister($this->em, $class); 
                break; 
 
            case $class->isInheritanceTypeSingleTable(): 
                $persister = new SingleTablePersister($this->em, $class); 
                break; 
 
            case $class->isInheritanceTypeJoined(): 
                $persister = new JoinedSubclassPersister($this->em, $class); 
                break; 
 
            default: 
                throw new RuntimeException('No persister found for entity.'); 
        } 
 
        if ($this->hasCache && $class->cache !== null) { 
            $persister = $this->em->getConfiguration() 
                ->getSecondLevelCacheConfiguration() 
                ->getCacheFactory() 
                ->buildCachedEntityPersister($this->em, $persister, $class); 
        } 
 
        $this->persisters[$entityName] = $persister; 
 
        return $this->persisters[$entityName]; 
    } 
 
    /** 
     * Gets a collection persister for a collection-valued association. 
     * 
     * @psalm-param array<string, mixed> $association 
     * 
     * @return CollectionPersister 
     */ 
    public function getCollectionPersister(array $association) 
    { 
        $role = isset($association['cache']) 
            ? $association['sourceEntity'] . '::' . $association['fieldName'] 
            : $association['type']; 
 
        if (isset($this->collectionPersisters[$role])) { 
            return $this->collectionPersisters[$role]; 
        } 
 
        $persister = $association['type'] === ClassMetadata::ONE_TO_MANY 
            ? new OneToManyPersister($this->em) 
            : new ManyToManyPersister($this->em); 
 
        if ($this->hasCache && isset($association['cache'])) { 
            $persister = $this->em->getConfiguration() 
                ->getSecondLevelCacheConfiguration() 
                ->getCacheFactory() 
                ->buildCachedCollectionPersister($this->em, $persister, $association); 
        } 
 
        $this->collectionPersisters[$role] = $persister; 
 
        return $this->collectionPersisters[$role]; 
    } 
 
    /** 
     * INTERNAL: 
     * Registers an entity as managed. 
     * 
     * @param object  $entity The entity. 
     * @param mixed[] $id     The identifier values. 
     * @param mixed[] $data   The original entity data. 
     * 
     * @return void 
     */ 
    public function registerManaged($entity, array $id, array $data) 
    { 
        $oid = spl_object_id($entity); 
 
        $this->entityIdentifiers[$oid]  = $id; 
        $this->entityStates[$oid]       = self::STATE_MANAGED; 
        $this->originalEntityData[$oid] = $data; 
 
        $this->addToIdentityMap($entity); 
 
        if ($entity instanceof NotifyPropertyChanged && ( ! $entity instanceof Proxy || $entity->__isInitialized())) { 
            $entity->addPropertyChangedListener($this); 
        } 
    } 
 
    /** 
     * INTERNAL: 
     * Clears the property changeset of the entity with the given OID. 
     * 
     * @param int $oid The entity's OID. 
     * 
     * @return void 
     */ 
    public function clearEntityChangeSet($oid) 
    { 
        unset($this->entityChangeSets[$oid]); 
    } 
 
    /* PropertyChangedListener implementation */ 
 
    /** 
     * Notifies this UnitOfWork of a property change in an entity. 
     * 
     * @param object $sender       The entity that owns the property. 
     * @param string $propertyName The name of the property that changed. 
     * @param mixed  $oldValue     The old value of the property. 
     * @param mixed  $newValue     The new value of the property. 
     * 
     * @return void 
     */ 
    public function propertyChanged($sender, $propertyName, $oldValue, $newValue) 
    { 
        $oid   = spl_object_id($sender); 
        $class = $this->em->getClassMetadata(get_class($sender)); 
 
        $isAssocField = isset($class->associationMappings[$propertyName]); 
 
        if (! $isAssocField && ! isset($class->fieldMappings[$propertyName])) { 
            return; // ignore non-persistent fields 
        } 
 
        // Update changeset and mark entity for synchronization 
        $this->entityChangeSets[$oid][$propertyName] = [$oldValue, $newValue]; 
 
        if (! isset($this->scheduledForSynchronization[$class->rootEntityName][$oid])) { 
            $this->scheduleForDirtyCheck($sender); 
        } 
    } 
 
    /** 
     * Gets the currently scheduled entity insertions in this UnitOfWork. 
     * 
     * @psalm-return array<int, object> 
     */ 
    public function getScheduledEntityInsertions() 
    { 
        return $this->entityInsertions; 
    } 
 
    /** 
     * Gets the currently scheduled entity updates in this UnitOfWork. 
     * 
     * @psalm-return array<int, object> 
     */ 
    public function getScheduledEntityUpdates() 
    { 
        return $this->entityUpdates; 
    } 
 
    /** 
     * Gets the currently scheduled entity deletions in this UnitOfWork. 
     * 
     * @psalm-return array<int, object> 
     */ 
    public function getScheduledEntityDeletions() 
    { 
        return $this->entityDeletions; 
    } 
 
    /** 
     * Gets the currently scheduled complete collection deletions 
     * 
     * @psalm-return array<int, Collection<array-key, object>> 
     */ 
    public function getScheduledCollectionDeletions() 
    { 
        return $this->collectionDeletions; 
    } 
 
    /** 
     * Gets the currently scheduled collection inserts, updates and deletes. 
     * 
     * @psalm-return array<int, Collection<array-key, object>> 
     */ 
    public function getScheduledCollectionUpdates() 
    { 
        return $this->collectionUpdates; 
    } 
 
    /** 
     * Helper method to initialize a lazy loading proxy or persistent collection. 
     * 
     * @param object $obj 
     * 
     * @return void 
     */ 
    public function initializeObject($obj) 
    { 
        if ($obj instanceof Proxy) { 
            $obj->__load(); 
 
            return; 
        } 
 
        if ($obj instanceof PersistentCollection) { 
            $obj->initialize(); 
        } 
    } 
 
    /** 
     * Helper method to show an object as string. 
     * 
     * @param object $obj 
     */ 
    private static function objToStr($obj): string 
    { 
        return method_exists($obj, '__toString') ? (string) $obj : get_debug_type($obj) . '@' . spl_object_id($obj); 
    } 
 
    /** 
     * Marks an entity as read-only so that it will not be considered for updates during UnitOfWork#commit(). 
     * 
     * This operation cannot be undone as some parts of the UnitOfWork now keep gathering information 
     * on this object that might be necessary to perform a correct update. 
     * 
     * @param object $object 
     * 
     * @return void 
     * 
     * @throws ORMInvalidArgumentException 
     */ 
    public function markReadOnly($object) 
    { 
        if (! is_object($object) || ! $this->isInIdentityMap($object)) { 
            throw ORMInvalidArgumentException::readOnlyRequiresManagedEntity($object); 
        } 
 
        $this->readOnlyObjects[spl_object_id($object)] = true; 
    } 
 
    /** 
     * Is this entity read only? 
     * 
     * @param object $object 
     * 
     * @return bool 
     * 
     * @throws ORMInvalidArgumentException 
     */ 
    public function isReadOnly($object) 
    { 
        if (! is_object($object)) { 
            throw ORMInvalidArgumentException::readOnlyRequiresManagedEntity($object); 
        } 
 
        return isset($this->readOnlyObjects[spl_object_id($object)]); 
    } 
 
    /** 
     * Perform whatever processing is encapsulated here after completion of the transaction. 
     */ 
    private function afterTransactionComplete(): void 
    { 
        $this->performCallbackOnCachedPersister(static function (CachedPersister $persister) { 
            $persister->afterTransactionComplete(); 
        }); 
    } 
 
    /** 
     * Perform whatever processing is encapsulated here after completion of the rolled-back. 
     */ 
    private function afterTransactionRolledBack(): void 
    { 
        $this->performCallbackOnCachedPersister(static function (CachedPersister $persister) { 
            $persister->afterTransactionRolledBack(); 
        }); 
    } 
 
    /** 
     * Performs an action after the transaction. 
     */ 
    private function performCallbackOnCachedPersister(callable $callback): void 
    { 
        if (! $this->hasCache) { 
            return; 
        } 
 
        foreach (array_merge($this->persisters, $this->collectionPersisters) as $persister) { 
            if ($persister instanceof CachedPersister) { 
                $callback($persister); 
            } 
        } 
    } 
 
    private function dispatchOnFlushEvent(): void 
    { 
        if ($this->evm->hasListeners(Events::onFlush)) { 
            $this->evm->dispatchEvent(Events::onFlush, new OnFlushEventArgs($this->em)); 
        } 
    } 
 
    private function dispatchPostFlushEvent(): void 
    { 
        if ($this->evm->hasListeners(Events::postFlush)) { 
            $this->evm->dispatchEvent(Events::postFlush, new PostFlushEventArgs($this->em)); 
        } 
    } 
 
    /** 
     * Verifies if two given entities actually are the same based on identifier comparison 
     * 
     * @param object $entity1 
     * @param object $entity2 
     */ 
    private function isIdentifierEquals($entity1, $entity2): bool 
    { 
        if ($entity1 === $entity2) { 
            return true; 
        } 
 
        $class = $this->em->getClassMetadata(get_class($entity1)); 
 
        if ($class !== $this->em->getClassMetadata(get_class($entity2))) { 
            return false; 
        } 
 
        $oid1 = spl_object_id($entity1); 
        $oid2 = spl_object_id($entity2); 
 
        $id1 = $this->entityIdentifiers[$oid1] ?? $this->identifierFlattener->flattenIdentifier($class, $class->getIdentifierValues($entity1)); 
        $id2 = $this->entityIdentifiers[$oid2] ?? $this->identifierFlattener->flattenIdentifier($class, $class->getIdentifierValues($entity2)); 
 
        return $id1 === $id2 || implode(' ', $id1) === implode(' ', $id2); 
    } 
 
    /** 
     * @throws ORMInvalidArgumentException 
     */ 
    private function assertThatThereAreNoUnintentionallyNonPersistedAssociations(): void 
    { 
        $entitiesNeedingCascadePersist = array_diff_key($this->nonCascadedNewDetectedEntities, $this->entityInsertions); 
 
        $this->nonCascadedNewDetectedEntities = []; 
 
        if ($entitiesNeedingCascadePersist) { 
            throw ORMInvalidArgumentException::newEntitiesFoundThroughRelationships( 
                array_values($entitiesNeedingCascadePersist) 
            ); 
        } 
    } 
 
    /** 
     * @param object $entity 
     * @param object $managedCopy 
     * 
     * @throws ORMException 
     * @throws OptimisticLockException 
     * @throws TransactionRequiredException 
     */ 
    private function mergeEntityStateIntoManagedCopy($entity, $managedCopy): void 
    { 
        if (! $this->isLoaded($entity)) { 
            return; 
        } 
 
        if (! $this->isLoaded($managedCopy)) { 
            $managedCopy->__load(); 
        } 
 
        $class = $this->em->getClassMetadata(get_class($entity)); 
 
        foreach ($this->reflectionPropertiesGetter->getProperties($class->name) as $prop) { 
            $name = $prop->name; 
 
            $prop->setAccessible(true); 
 
            if (! isset($class->associationMappings[$name])) { 
                if (! $class->isIdentifier($name)) { 
                    $prop->setValue($managedCopy, $prop->getValue($entity)); 
                } 
            } else { 
                $assoc2 = $class->associationMappings[$name]; 
 
                if ($assoc2['type'] & ClassMetadata::TO_ONE) { 
                    $other = $prop->getValue($entity); 
                    if ($other === null) { 
                        $prop->setValue($managedCopy, null); 
                    } else { 
                        if ($other instanceof Proxy && ! $other->__isInitialized()) { 
                            // do not merge fields marked lazy that have not been fetched. 
                            continue; 
                        } 
 
                        if (! $assoc2['isCascadeMerge']) { 
                            if ($this->getEntityState($other) === self::STATE_DETACHED) { 
                                $targetClass = $this->em->getClassMetadata($assoc2['targetEntity']); 
                                $relatedId   = $targetClass->getIdentifierValues($other); 
 
                                if ($targetClass->subClasses) { 
                                    $other = $this->em->find($targetClass->name, $relatedId); 
                                } else { 
                                    $other = $this->em->getProxyFactory()->getProxy( 
                                        $assoc2['targetEntity'], 
                                        $relatedId 
                                    ); 
                                    $this->registerManaged($other, $relatedId, []); 
                                } 
                            } 
 
                            $prop->setValue($managedCopy, $other); 
                        } 
                    } 
                } else { 
                    $mergeCol = $prop->getValue($entity); 
 
                    if ($mergeCol instanceof PersistentCollection && ! $mergeCol->isInitialized()) { 
                        // do not merge fields marked lazy that have not been fetched. 
                        // keep the lazy persistent collection of the managed copy. 
                        continue; 
                    } 
 
                    $managedCol = $prop->getValue($managedCopy); 
 
                    if (! $managedCol) { 
                        $managedCol = new PersistentCollection( 
                            $this->em, 
                            $this->em->getClassMetadata($assoc2['targetEntity']), 
                            new ArrayCollection() 
                        ); 
                        $managedCol->setOwner($managedCopy, $assoc2); 
                        $prop->setValue($managedCopy, $managedCol); 
                    } 
 
                    if ($assoc2['isCascadeMerge']) { 
                        $managedCol->initialize(); 
 
                        // clear and set dirty a managed collection if its not also the same collection to merge from. 
                        if (! $managedCol->isEmpty() && $managedCol !== $mergeCol) { 
                            $managedCol->unwrap()->clear(); 
                            $managedCol->setDirty(true); 
 
                            if ( 
                                $assoc2['isOwningSide'] 
                                && $assoc2['type'] === ClassMetadata::MANY_TO_MANY 
                                && $class->isChangeTrackingNotify() 
                            ) { 
                                $this->scheduleForDirtyCheck($managedCopy); 
                            } 
                        } 
                    } 
                } 
            } 
 
            if ($class->isChangeTrackingNotify()) { 
                // Just treat all properties as changed, there is no other choice. 
                $this->propertyChanged($managedCopy, $name, null, $prop->getValue($managedCopy)); 
            } 
        } 
    } 
 
    /** 
     * This method called by hydrators, and indicates that hydrator totally completed current hydration cycle. 
     * Unit of work able to fire deferred events, related to loading events here. 
     * 
     * @internal should be called internally from object hydrators 
     * 
     * @return void 
     */ 
    public function hydrationComplete() 
    { 
        $this->hydrationCompleteHandler->hydrationComplete(); 
    } 
 
    private function clearIdentityMapForEntityName(string $entityName): void 
    { 
        if (! isset($this->identityMap[$entityName])) { 
            return; 
        } 
 
        $visited = []; 
 
        foreach ($this->identityMap[$entityName] as $entity) { 
            $this->doDetach($entity, $visited, false); 
        } 
    } 
 
    private function clearEntityInsertionsForEntityName(string $entityName): void 
    { 
        foreach ($this->entityInsertions as $hash => $entity) { 
            // note: performance optimization - `instanceof` is much faster than a function call 
            if ($entity instanceof $entityName && get_class($entity) === $entityName) { 
                unset($this->entityInsertions[$hash]); 
            } 
        } 
    } 
 
    /** 
     * @param mixed $identifierValue 
     * 
     * @return mixed the identifier after type conversion 
     * 
     * @throws MappingException if the entity has more than a single identifier. 
     */ 
    private function convertSingleFieldIdentifierToPHPValue(ClassMetadata $class, $identifierValue) 
    { 
        return $this->em->getConnection()->convertToPHPValue( 
            $identifierValue, 
            $class->getTypeOfField($class->getSingleIdentifierFieldName()) 
        ); 
    } 
}