vendor/doctrine/orm/lib/Doctrine/ORM/Internal/Hydration/ObjectHydrator.php line 325

  1. <?php
  3. declare(strict_types=1);
  5. namespace Doctrine\ORM\Internal\Hydration;
  7. use BackedEnum;
  8. use Doctrine\Common\Collections\ArrayCollection;
  9. use Doctrine\ORM\Mapping\ClassMetadata;
  10. use Doctrine\ORM\PersistentCollection;
  11. use Doctrine\ORM\Query;
  12. use Doctrine\ORM\UnitOfWork;
  13. use Doctrine\Persistence\Proxy;
  15. use function array_fill_keys;
  16. use function array_keys;
  17. use function count;
  18. use function is_array;
  19. use function key;
  20. use function ltrim;
  21. use function spl_object_id;
  23. /**
  24.  * The ObjectHydrator constructs an object graph out of an SQL result set.
  25.  *
  26.  * Internal note: Highly performance-sensitive code.
  27.  */
  28. class ObjectHydrator extends AbstractHydrator
  29. {
  30.     /** @var mixed[] */
  31.     private $identifierMap = [];
  33.     /** @var mixed[] */
  34.     private $resultPointers = [];
  36.     /** @var mixed[] */
  37.     private $idTemplate = [];
  39.     /** @var int */
  40.     private $resultCounter = 0;
  42.     /** @var mixed[] */
  43.     private $rootAliases = [];
  45.     /** @var mixed[] */
  46.     private $initializedCollections = [];
  48.     /** @var array<string, PersistentCollection> */
  49.     private $uninitializedCollections = [];
  51.     /** @var mixed[] */
  52.     private $existingCollections = [];
  54.     /**
  55.      * {@inheritdoc}
  56.      */
  57.     protected function prepare()
  58.     {
  59.         if (! isset($this->_hints[UnitOfWork::HINT_DEFEREAGERLOAD])) {
  60.             $this->_hints[UnitOfWork::HINT_DEFEREAGERLOAD] = true;
  61.         }
  63.         foreach ($this->resultSetMapping()->aliasMap as $dqlAlias => $className) {
  64.             $this->identifierMap[$dqlAlias] = [];
  65.             $this->idTemplate[$dqlAlias]    = '';
  67.             // Remember which associations are "fetch joined", so that we know where to inject
  68.             // collection stubs or proxies and where not.
  69.             if (! isset($this->resultSetMapping()->relationMap[$dqlAlias])) {
  70.                 continue;
  71.             }
  73.             $parent = $this->resultSetMapping()->parentAliasMap[$dqlAlias];
  75.             if (! isset($this->resultSetMapping()->aliasMap[$parent])) {
  76.                 throw HydrationException::parentObjectOfRelationNotFound($dqlAlias, $parent);
  77.             }
  79.             $sourceClassName = $this->resultSetMapping()->aliasMap[$parent];
  80.             $sourceClass     = $this->getClassMetadata($sourceClassName);
  81.             $assoc           = $sourceClass->associationMappings[$this->resultSetMapping()->relationMap[$dqlAlias]];
  83.             $this->_hints['fetched'][$parent][$assoc['fieldName']] = true;
  85.             if ($assoc['type'] === ClassMetadata::MANY_TO_MANY) {
  86.                 continue;
  87.             }
  89.             // Mark any non-collection opposite sides as fetched, too.
  90.             if ($assoc['mappedBy']) {
  91.                 $this->_hints['fetched'][$dqlAlias][$assoc['mappedBy']] = true;
  93.                 continue;
  94.             }
  96.             // handle fetch-joined owning side bi-directional one-to-one associations
  97.             if ($assoc['inversedBy']) {
  98.                 $class        = $this->getClassMetadata($className);
  99.                 $inverseAssoc = $class->associationMappings[$assoc['inversedBy']];
  101.                 if (! ($inverseAssoc['type'] & ClassMetadata::TO_ONE)) {
  102.                     continue;
  103.                 }
  105.                 $this->_hints['fetched'][$dqlAlias][$inverseAssoc['fieldName']] = true;
  106.             }
  107.         }
  108.     }
  110.     /**
  111.      * {@inheritdoc}
  112.      */
  113.     protected function cleanup()
  114.     {
  115.         $eagerLoad = isset($this->_hints[UnitOfWork::HINT_DEFEREAGERLOAD]) && $this->_hints[UnitOfWork::HINT_DEFEREAGERLOAD] === true;
  117.         parent::cleanup();
  119.         $this->identifierMap            =
  120.         $this->initializedCollections   =
  121.         $this->uninitializedCollections =
  122.         $this->existingCollections      =
  123.         $this->resultPointers           = [];
  125.         if ($eagerLoad) {
  126.             $this->_uow->triggerEagerLoads();
  127.         }
  129.         $this->_uow->hydrationComplete();
  130.     }
  132.     protected function cleanupAfterRowIteration(): void
  133.     {
  134.         $this->identifierMap            =
  135.         $this->initializedCollections   =
  136.         $this->uninitializedCollections =
  137.         $this->existingCollections      =
  138.         $this->resultPointers           = [];
  139.     }
  141.     /**
  142.      * {@inheritdoc}
  143.      */
  144.     protected function hydrateAllData()
  145.     {
  146.         $result = [];
  148.         while ($row = $this->statement()->fetchAssociative()) {
  149.             $this->hydrateRowData($row, $result);
  150.         }
  152.         // Take snapshots from all newly initialized collections
  153.         foreach ($this->initializedCollections as $coll) {
  154.             $coll->takeSnapshot();
  155.         }
  157.         foreach ($this->uninitializedCollections as $coll) {
  158.             if (! $coll->isInitialized()) {
  159.                 $coll->setInitialized(true);
  160.             }
  161.         }
  163.         return $result;
  164.     }
  166.     /**
  167.      * Initializes a related collection.
  168.      *
  169.      * @param object $entity         The entity to which the collection belongs.
  170.      * @param string $fieldName      The name of the field on the entity that holds the collection.
  171.      * @param string $parentDqlAlias Alias of the parent fetch joining this collection.
  172.      */
  173.     private function initRelatedCollection(
  174.         $entity,
  175.         ClassMetadata $class,
  176.         string $fieldName,
  177.         string $parentDqlAlias
  178.     ): PersistentCollection {
  179.         $oid      = spl_object_id($entity);
  180.         $relation = $class->associationMappings[$fieldName];
  181.         $value    = $class->reflFields[$fieldName]->getValue($entity);
  183.         if ($value === null || is_array($value)) {
  184.             $value = new ArrayCollection((array) $value);
  185.         }
  187.         if (! $value instanceof PersistentCollection) {
  188.             $value = new PersistentCollection(
  189.                 $this->_em,
  190.                 $this->_metadataCache[$relation['targetEntity']],
  191.                 $value
  192.             );
  193.             $value->setOwner($entity, $relation);
  195.             $class->reflFields[$fieldName]->setValue($entity, $value);
  196.             $this->_uow->setOriginalEntityProperty($oid, $fieldName, $value);
  198.             $this->initializedCollections[$oid . $fieldName] = $value;
  199.         } elseif (
  200.             isset($this->_hints[Query::HINT_REFRESH]) ||
  201.             isset($this->_hints['fetched'][$parentDqlAlias][$fieldName]) &&
  202.              ! $value->isInitialized()
  203.         ) {
  204.             // Is already PersistentCollection, but either REFRESH or FETCH-JOIN and UNINITIALIZED!
  205.             $value->setDirty(false);
  206.             $value->setInitialized(true);
  207.             $value->unwrap()->clear();
  209.             $this->initializedCollections[$oid . $fieldName] = $value;
  210.         } else {
  211.             // Is already PersistentCollection, and DON'T REFRESH or FETCH-JOIN!
  212.             $this->existingCollections[$oid . $fieldName] = $value;
  213.         }
  215.         return $value;
  216.     }
  218.     /**
  219.      * Gets an entity instance.
  220.      *
  221.      * @param string $dqlAlias The DQL alias of the entity's class.
  222.      * @psalm-param array<string, mixed> $data     The instance data.
  223.      *
  224.      * @return object
  225.      *
  226.      * @throws HydrationException
  227.      */
  228.     private function getEntity(array $data, string $dqlAlias)
  229.     {
  230.         $className = $this->resultSetMapping()->aliasMap[$dqlAlias];
  232.         if (isset($this->resultSetMapping()->discriminatorColumns[$dqlAlias])) {
  233.             $fieldName = $this->resultSetMapping()->discriminatorColumns[$dqlAlias];
  235.             if (! isset($this->resultSetMapping()->metaMappings[$fieldName])) {
  236.                 throw HydrationException::missingDiscriminatorMetaMappingColumn($className, $fieldName, $dqlAlias);
  237.             }
  239.             $discrColumn = $this->resultSetMapping()->metaMappings[$fieldName];
  241.             if (! isset($data[$discrColumn])) {
  242.                 throw HydrationException::missingDiscriminatorColumn($className, $discrColumn, $dqlAlias);
  243.             }
  245.             if ($data[$discrColumn] === '') {
  246.                 throw HydrationException::emptyDiscriminatorValue($dqlAlias);
  247.             }
  249.             $discrMap           = $this->_metadataCache[$className]->discriminatorMap;
  250.             $discriminatorValue = $data[$discrColumn];
  251.             if ($discriminatorValue instanceof BackedEnum) {
  252.                 $discriminatorValue = $discriminatorValue->value;
  253.             }
  255.             $discriminatorValue = (string) $discriminatorValue;
  257.             if (! isset($discrMap[$discriminatorValue])) {
  258.                 throw HydrationException::invalidDiscriminatorValue($discriminatorValue, array_keys($discrMap));
  259.             }
  261.             $className = $discrMap[$discriminatorValue];
  263.             unset($data[$discrColumn]);
  264.         }
  266.         if (isset($this->_hints[Query::HINT_REFRESH_ENTITY], $this->rootAliases[$dqlAlias])) {
  267.             $this->registerManaged($this->_metadataCache[$className], $this->_hints[Query::HINT_REFRESH_ENTITY], $data);
  268.         }
  270.         $this->_hints['fetchAlias'] = $dqlAlias;
  272.         return $this->_uow->createEntity($className, $data, $this->_hints);
  273.     }
  275.     /**
  276.      * @psalm-param class-string $className
  277.      * @psalm-param array<string, mixed> $data
  278.      *
  279.      * @return mixed
  280.      */
  281.     private function getEntityFromIdentityMap(string $className, array $data)
  282.     {
  283.         // TODO: Abstract this code and UnitOfWork::createEntity() equivalent?
  284.         $class = $this->_metadataCache[$className];
  286.         if ($class->isIdentifierComposite) {
  287.             $idHash = '';
  289.             foreach ($class->identifier as $fieldName) {
  290.                 $idHash .= ' ' . (isset($class->associationMappings[$fieldName])
  291.                     ? $data[$class->associationMappings[$fieldName]['joinColumns'][0]['name']]
  292.                     : $data[$fieldName]);
  293.             }
  295.             return $this->_uow->tryGetByIdHash(ltrim($idHash), $class->rootEntityName);
  296.         } elseif (isset($class->associationMappings[$class->identifier[0]])) {
  297.             return $this->_uow->tryGetByIdHash($data[$class->associationMappings[$class->identifier[0]]['joinColumns'][0]['name']], $class->rootEntityName);
  298.         }
  300.         return $this->_uow->tryGetByIdHash($data[$class->identifier[0]], $class->rootEntityName);
  301.     }
  303.     /**
  304.      * Hydrates a single row in an SQL result set.
  305.      *
  306.      * @internal
  307.      * First, the data of the row is split into chunks where each chunk contains data
  308.      * that belongs to a particular component/class. Afterwards, all these chunks
  309.      * are processed, one after the other. For each chunk of class data only one of the
  310.      * following code paths is executed:
  311.      *
  312.      * Path A: The data chunk belongs to a joined/associated object and the association
  313.      *         is collection-valued.
  314.      * Path B: The data chunk belongs to a joined/associated object and the association
  315.      *         is single-valued.
  316.      * Path C: The data chunk belongs to a root result element/object that appears in the topmost
  317.      *         level of the hydrated result. A typical example are the objects of the type
  318.      *         specified by the FROM clause in a DQL query.
  319.      *
  320.      * @param mixed[] $row    The data of the row to process.
  321.      * @param mixed[] $result The result array to fill.
  322.      *
  323.      * @return void
  324.      */
  325.     protected function hydrateRowData(array $row, array &$result)
  326.     {
  327.         // Initialize
  328.         $id                 = $this->idTemplate; // initialize the id-memory
  329.         $nonemptyComponents = [];
  330.         // Split the row data into chunks of class data.
  331.         $rowData = $this->gatherRowData($row, $id, $nonemptyComponents);
  333.         // reset result pointers for each data row
  334.         $this->resultPointers = [];
  336.         // Hydrate the data chunks
  337.         foreach ($rowData['data'] as $dqlAlias => $data) {
  338.             $entityName = $this->resultSetMapping()->aliasMap[$dqlAlias];
  340.             if (isset($this->resultSetMapping()->parentAliasMap[$dqlAlias])) {
  341.                 // It's a joined result
  343.                 $parentAlias = $this->resultSetMapping()->parentAliasMap[$dqlAlias];
  344.                 // we need the $path to save into the identifier map which entities were already
  345.                 // seen for this parent-child relationship
  346.                 $path = $parentAlias . '.' . $dqlAlias;
  348.                 // We have a RIGHT JOIN result here. Doctrine cannot hydrate RIGHT JOIN Object-Graphs
  349.                 if (! isset($nonemptyComponents[$parentAlias])) {
  350.                     // TODO: Add special case code where we hydrate the right join objects into identity map at least
  351.                     continue;
  352.                 }
  354.                 $parentClass   = $this->_metadataCache[$this->resultSetMapping()->aliasMap[$parentAlias]];
  355.                 $relationField = $this->resultSetMapping()->relationMap[$dqlAlias];
  356.                 $relation      = $parentClass->associationMappings[$relationField];
  357.                 $reflField     = $parentClass->reflFields[$relationField];
  359.                 // Get a reference to the parent object to which the joined element belongs.
  360.                 if ($this->resultSetMapping()->isMixed && isset($this->rootAliases[$parentAlias])) {
  361.                     $objectClass  = $this->resultPointers[$parentAlias];
  362.                     $parentObject = $objectClass[key($objectClass)];
  363.                 } elseif (isset($this->resultPointers[$parentAlias])) {
  364.                     $parentObject = $this->resultPointers[$parentAlias];
  365.                 } else {
  366.                     // Parent object of relation not found, mark as not-fetched again
  367.                     $element = $this->getEntity($data, $dqlAlias);
  369.                     // Update result pointer and provide initial fetch data for parent
  370.                     $this->resultPointers[$dqlAlias]               = $element;
  371.                     $rowData['data'][$parentAlias][$relationField] = $element;
  373.                     // Mark as not-fetched again
  374.                     unset($this->_hints['fetched'][$parentAlias][$relationField]);
  375.                     continue;
  376.                 }
  378.                 $oid = spl_object_id($parentObject);
  380.                 // Check the type of the relation (many or single-valued)
  381.                 if (! ($relation['type'] & ClassMetadata::TO_ONE)) {
  382.                     // PATH A: Collection-valued association
  383.                     $reflFieldValue = $reflField->getValue($parentObject);
  385.                     if (isset($nonemptyComponents[$dqlAlias])) {
  386.                         $collKey = $oid . $relationField;
  387.                         if (isset($this->initializedCollections[$collKey])) {
  388.                             $reflFieldValue = $this->initializedCollections[$collKey];
  389.                         } elseif (! isset($this->existingCollections[$collKey])) {
  390.                             $reflFieldValue = $this->initRelatedCollection($parentObject, $parentClass, $relationField, $parentAlias);
  391.                         }
  393.                         $indexExists  = isset($this->identifierMap[$path][$id[$parentAlias]][$id[$dqlAlias]]);
  394.                         $index        = $indexExists ? $this->identifierMap[$path][$id[$parentAlias]][$id[$dqlAlias]] : false;
  395.                         $indexIsValid = $index !== false ? isset($reflFieldValue[$index]) : false;
  397.                         if (! $indexExists || ! $indexIsValid) {
  398.                             if (isset($this->existingCollections[$collKey])) {
  399.                                 // Collection exists, only look for the element in the identity map.
  400.                                 $element = $this->getEntityFromIdentityMap($entityName, $data);
  401.                                 if ($element) {
  402.                                     $this->resultPointers[$dqlAlias] = $element;
  403.                                 } else {
  404.                                     unset($this->resultPointers[$dqlAlias]);
  405.                                 }
  406.                             } else {
  407.                                 $element = $this->getEntity($data, $dqlAlias);
  409.                                 if (isset($this->resultSetMapping()->indexByMap[$dqlAlias])) {
  410.                                     $indexValue = $row[$this->resultSetMapping()->indexByMap[$dqlAlias]];
  411.                                     $reflFieldValue->hydrateSet($indexValue, $element);
  412.                                     $this->identifierMap[$path][$id[$parentAlias]][$id[$dqlAlias]] = $indexValue;
  413.                                 } else {
  414.                                     if (! $reflFieldValue->contains($element)) {
  415.                                         $reflFieldValue->hydrateAdd($element);
  416.                                         $reflFieldValue->last();
  417.                                     }
  419.                                     $this->identifierMap[$path][$id[$parentAlias]][$id[$dqlAlias]] = $reflFieldValue->key();
  420.                                 }
  422.                                 // Update result pointer
  423.                                 $this->resultPointers[$dqlAlias] = $element;
  424.                             }
  425.                         } else {
  426.                             // Update result pointer
  427.                             $this->resultPointers[$dqlAlias] = $reflFieldValue[$index];
  428.                         }
  429.                     } elseif (! $reflFieldValue) {
  430.                         $this->initRelatedCollection($parentObject, $parentClass, $relationField, $parentAlias);
  431.                     } elseif ($reflFieldValue instanceof PersistentCollection && $reflFieldValue->isInitialized() === false && ! isset($this->uninitializedCollections[$oid . $relationField])) {
  432.                         $this->uninitializedCollections[$oid . $relationField] = $reflFieldValue;
  433.                     }
  434.                 } else {
  435.                     // PATH B: Single-valued association
  436.                     $reflFieldValue = $reflField->getValue($parentObject);
  438.                     if (! $reflFieldValue || isset($this->_hints[Query::HINT_REFRESH]) || ($reflFieldValue instanceof Proxy && ! $reflFieldValue->__isInitialized())) {
  439.                         // we only need to take action if this value is null,
  440.                         // we refresh the entity or its an uninitialized proxy.
  441.                         if (isset($nonemptyComponents[$dqlAlias])) {
  442.                             $element = $this->getEntity($data, $dqlAlias);
  443.                             $reflField->setValue($parentObject, $element);
  444.                             $this->_uow->setOriginalEntityProperty($oid, $relationField, $element);
  445.                             $targetClass = $this->_metadataCache[$relation['targetEntity']];
  447.                             if ($relation['isOwningSide']) {
  448.                                 // TODO: Just check hints['fetched'] here?
  449.                                 // If there is an inverse mapping on the target class its bidirectional
  450.                                 if ($relation['inversedBy']) {
  451.                                     $inverseAssoc = $targetClass->associationMappings[$relation['inversedBy']];
  452.                                     if ($inverseAssoc['type'] & ClassMetadata::TO_ONE) {
  453.                                         $targetClass->reflFields[$inverseAssoc['fieldName']]->setValue($element, $parentObject);
  454.                                         $this->_uow->setOriginalEntityProperty(spl_object_id($element), $inverseAssoc['fieldName'], $parentObject);
  455.                                     }
  456.                                 } elseif ($parentClass === $targetClass && $relation['mappedBy']) {
  457.                                     // Special case: bi-directional self-referencing one-one on the same class
  458.                                     $targetClass->reflFields[$relationField]->setValue($element, $parentObject);
  459.                                 }
  460.                             } else {
  461.                                 // For sure bidirectional, as there is no inverse side in unidirectional mappings
  462.                                 $targetClass->reflFields[$relation['mappedBy']]->setValue($element, $parentObject);
  463.                                 $this->_uow->setOriginalEntityProperty(spl_object_id($element), $relation['mappedBy'], $parentObject);
  464.                             }
  466.                             // Update result pointer
  467.                             $this->resultPointers[$dqlAlias] = $element;
  468.                         } else {
  469.                             $this->_uow->setOriginalEntityProperty($oid, $relationField, null);
  470.                             $reflField->setValue($parentObject, null);
  471.                         }
  472.                         // else leave $reflFieldValue null for single-valued associations
  473.                     } else {
  474.                         // Update result pointer
  475.                         $this->resultPointers[$dqlAlias] = $reflFieldValue;
  476.                     }
  477.                 }
  478.             } else {
  479.                 // PATH C: Its a root result element
  480.                 $this->rootAliases[$dqlAlias] = true; // Mark as root alias
  481.                 $entityKey                    = $this->resultSetMapping()->entityMappings[$dqlAlias] ?: 0;
  483.                 // if this row has a NULL value for the root result id then make it a null result.
  484.                 if (! isset($nonemptyComponents[$dqlAlias])) {
  485.                     if ($this->resultSetMapping()->isMixed) {
  486.                         $result[] = [$entityKey => null];
  487.                     } else {
  488.                         $result[] = null;
  489.                     }
  491.                     $resultKey = $this->resultCounter;
  492.                     ++$this->resultCounter;
  493.                     continue;
  494.                 }
  496.                 // check for existing result from the iterations before
  497.                 if (! isset($this->identifierMap[$dqlAlias][$id[$dqlAlias]])) {
  498.                     $element = $this->getEntity($data, $dqlAlias);
  500.                     if ($this->resultSetMapping()->isMixed) {
  501.                         $element = [$entityKey => $element];
  502.                     }
  504.                     if (isset($this->resultSetMapping()->indexByMap[$dqlAlias])) {
  505.                         $resultKey = $row[$this->resultSetMapping()->indexByMap[$dqlAlias]];
  507.                         if (isset($this->_hints['collection'])) {
  508.                             $this->_hints['collection']->hydrateSet($resultKey, $element);
  509.                         }
  511.                         $result[$resultKey] = $element;
  512.                     } else {
  513.                         $resultKey = $this->resultCounter;
  514.                         ++$this->resultCounter;
  516.                         if (isset($this->_hints['collection'])) {
  517.                             $this->_hints['collection']->hydrateAdd($element);
  518.                         }
  520.                         $result[] = $element;
  521.                     }
  523.                     $this->identifierMap[$dqlAlias][$id[$dqlAlias]] = $resultKey;
  525.                     // Update result pointer
  526.                     $this->resultPointers[$dqlAlias] = $element;
  527.                 } else {
  528.                     // Update result pointer
  529.                     $index                           = $this->identifierMap[$dqlAlias][$id[$dqlAlias]];
  530.                     $this->resultPointers[$dqlAlias] = $result[$index];
  531.                     $resultKey                       = $index;
  532.                 }
  533.             }
  535.             if (isset($this->_hints[Query::HINT_INTERNAL_ITERATION]) && $this->_hints[Query::HINT_INTERNAL_ITERATION]) {
  536.                 $this->_uow->hydrationComplete();
  537.             }
  538.         }
  540.         if (! isset($resultKey)) {
  541.             $this->resultCounter++;
  542.         }
  544.         // Append scalar values to mixed result sets
  545.         if (isset($rowData['scalars'])) {
  546.             if (! isset($resultKey)) {
  547.                 $resultKey = isset($this->resultSetMapping()->indexByMap['scalars'])
  548.                     ? $row[$this->resultSetMapping()->indexByMap['scalars']]
  549.                     : $this->resultCounter - 1;
  550.             }
  552.             foreach ($rowData['scalars'] as $name => $value) {
  553.                 $result[$resultKey][$name] = $value;
  554.             }
  555.         }
  557.         // Append new object to mixed result sets
  558.         if (isset($rowData['newObjects'])) {
  559.             if (! isset($resultKey)) {
  560.                 $resultKey = $this->resultCounter - 1;
  561.             }
  563.             $scalarCount = (isset($rowData['scalars']) ? count($rowData['scalars']) : 0);
  565.             foreach ($rowData['newObjects'] as $objIndex => $newObject) {
  566.                 $class = $newObject['class'];
  567.                 $args  = $newObject['args'];
  568.                 $obj   = $class->newInstanceArgs($args);
  570.                 if ($scalarCount === 0 && count($rowData['newObjects']) === 1) {
  571.                     $result[$resultKey] = $obj;
  573.                     continue;
  574.                 }
  576.                 $result[$resultKey][$objIndex] = $obj;
  577.             }
  578.         }
  579.     }
  581.     /**
  582.      * When executed in a hydrate() loop we may have to clear internal state to
  583.      * decrease memory consumption.
  584.      *
  585.      * @param mixed $eventArgs
  586.      *
  587.      * @return void
  588.      */
  589.     public function onClear($eventArgs)
  590.     {
  591.         parent::onClear($eventArgs);
  593.         $aliases = array_keys($this->identifierMap);
  595.         $this->identifierMap = array_fill_keys($aliases, []);
  596.     }
  597. }