424 lines
19 KiB
PHP
424 lines
19 KiB
PHP
<?php
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/*
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* $Id$
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.doctrine-project.org>.
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*/
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namespace Doctrine\ORM\Internal\Hydration;
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use PDO,
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Doctrine\ORM\PersistentCollection,
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Doctrine\ORM\Query,
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Doctrine\Common\Collections\ArrayCollection,
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Doctrine\Common\Collections\Collection;
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/**
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* The ObjectHydrator constructs an object graph out of an SQL result set.
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*
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* @author Roman Borschel <roman@code-factory.org>
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* @since 2.0
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* @internal Highly performance-sensitive code.
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*/
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class ObjectHydrator extends AbstractHydrator
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{
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/* Local ClassMetadata cache to avoid going to the EntityManager all the time.
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* This local cache is maintained between hydration runs and not cleared.
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*/
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private $_ce = array();
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/* The following parts are reinitialized on every hydration run. */
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private $_identifierMap;
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private $_resultPointers;
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private $_idTemplate;
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private $_resultCounter;
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private $_rootAliases = array();
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private $_initializedCollections = array();
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private $_existingCollections = array();
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//private $_createdEntities;
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/** @override */
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protected function _prepare()
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{
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$this->_identifierMap =
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$this->_resultPointers =
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$this->_idTemplate = array();
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$this->_resultCounter = 0;
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foreach ($this->_rsm->aliasMap as $dqlAlias => $className) {
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$this->_identifierMap[$dqlAlias] = array();
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$this->_idTemplate[$dqlAlias] = '';
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$class = $this->_em->getClassMetadata($className);
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if ( ! isset($this->_ce[$className])) {
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$this->_ce[$className] = $class;
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}
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// Remember which associations are "fetch joined", so that we know where to inject
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// collection stubs or proxies and where not.
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if (isset($this->_rsm->relationMap[$dqlAlias])) {
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$sourceClassName = $this->_rsm->aliasMap[$this->_rsm->parentAliasMap[$dqlAlias]];
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$sourceClass = $this->_getClassMetadata($sourceClassName);
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$assoc = $sourceClass->associationMappings[$this->_rsm->relationMap[$dqlAlias]];
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$this->_hints['fetched'][$sourceClassName][$assoc->sourceFieldName] = true;
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if ($sourceClass->subClasses) {
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foreach ($sourceClass->subClasses as $sourceSubclassName) {
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$this->_hints['fetched'][$sourceSubclassName][$assoc->sourceFieldName] = true;
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}
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}
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if ( ! $assoc->isManyToMany()) {
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// Mark any non-collection opposite sides as fetched, too.
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if ($assoc->mappedBy) {
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$this->_hints['fetched'][$className][$assoc->mappedBy] = true;
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} else {
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if (isset($class->inverseMappings[$sourceClassName][$assoc->sourceFieldName])) {
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$inverseAssoc = $class->inverseMappings[$sourceClassName][$assoc->sourceFieldName];
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if ($inverseAssoc->isOneToOne()) {
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$this->_hints['fetched'][$className][$inverseAssoc->sourceFieldName] = true;
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if ($class->subClasses) {
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foreach ($class->subClasses as $targetSubclassName) {
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$this->_hints['fetched'][$targetSubclassName][$inverseAssoc->sourceFieldName] = true;
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}
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}
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}
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}
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}
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}
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}
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}
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}
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/**
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* {@inheritdoc}
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*/
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protected function _cleanup()
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{
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parent::_cleanup();
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$this->_identifierMap =
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$this->_initializedCollections =
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$this->_existingCollections =
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$this->_resultPointers = array();
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}
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/**
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* {@inheritdoc}
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*/
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protected function _hydrateAll()
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{
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$result = array();
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$cache = array();
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while ($row = $this->_stmt->fetch(PDO::FETCH_ASSOC)) {
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$this->_hydrateRow($row, $cache, $result);
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}
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// Take snapshots from all newly initialized collections
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foreach ($this->_initializedCollections as $coll) {
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$coll->takeSnapshot();
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}
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return $result;
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}
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/**
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* Initializes a related collection.
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*
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* @param object $entity The entity to which the collection belongs.
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* @param string $name The name of the field on the entity that holds the collection.
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*/
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private function _initRelatedCollection($entity, $class, $fieldName)
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{
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$oid = spl_object_hash($entity);
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$relation = $class->associationMappings[$fieldName];
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$value = $class->reflFields[$fieldName]->getValue($entity);
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if ($value === null) {
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$value = new ArrayCollection;
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}
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if ( ! $value instanceof PersistentCollection) {
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$value = new PersistentCollection(
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$this->_em,
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$this->_ce[$relation->targetEntityName],
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$value
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);
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$value->setOwner($entity, $relation);
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$class->reflFields[$fieldName]->setValue($entity, $value);
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$this->_uow->setOriginalEntityProperty($oid, $fieldName, $value);
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$this->_initializedCollections[$oid . $fieldName] = $value;
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} else if (isset($this->_hints[Query::HINT_REFRESH])) {
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// Is already PersistentCollection, but REFRESH
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$value->setDirty(false);
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$value->setInitialized(true);
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$value->unwrap()->clear();
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$this->_initializedCollections[$oid . $fieldName] = $value;
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} else {
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// Is already PersistentCollection, and DONT REFRESH
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$this->_existingCollections[$oid . $fieldName] = $value;
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}
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return $value;
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}
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/**
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* Gets an entity instance.
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*
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* @param $data The instance data.
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* @param $dqlAlias The DQL alias of the entity's class.
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* @return object The entity.
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*/
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private function _getEntity(array $data, $dqlAlias)
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{
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$className = $this->_rsm->aliasMap[$dqlAlias];
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if (isset($this->_rsm->discriminatorColumns[$dqlAlias])) {
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$discrColumn = $this->_rsm->metaMappings[$this->_rsm->discriminatorColumns[$dqlAlias]];
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$className = $this->_ce[$className]->discriminatorMap[$data[$discrColumn]];
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unset($data[$discrColumn]);
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}
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return $this->_uow->createEntity($className, $data, $this->_hints);
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}
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private function _getEntityFromIdentityMap($className, array $data)
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{
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$class = $this->_ce[$className];
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if ($class->isIdentifierComposite) {
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$idHash = '';
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foreach ($class->identifier as $fieldName) {
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$idHash .= $data[$fieldName] . ' ';
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}
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return $this->_uow->tryGetByIdHash(rtrim($idHash), $class->rootEntityName);
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} else {
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return $this->_uow->tryGetByIdHash($data[$class->identifier[0]], $class->rootEntityName);
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}
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}
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/**
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* Gets a ClassMetadata instance from the local cache.
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* If the instance is not yet in the local cache, it is loaded into the
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* local cache.
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*
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* @param string $className The name of the class.
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* @return ClassMetadata
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*/
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private function _getClassMetadata($className)
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{
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if ( ! isset($this->_ce[$className])) {
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$this->_ce[$className] = $this->_em->getClassMetadata($className);
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}
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return $this->_ce[$className];
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}
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/**
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* Hydrates a single row in an SQL result set.
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*
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* @internal
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* First, the data of the row is split into chunks where each chunk contains data
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* that belongs to a particular component/class. Afterwards, all these chunks
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* are processed, one after the other. For each chunk of class data only one of the
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* following code paths is executed:
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*
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* Path A: The data chunk belongs to a joined/associated object and the association
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* is collection-valued.
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* Path B: The data chunk belongs to a joined/associated object and the association
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* is single-valued.
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* Path C: The data chunk belongs to a root result element/object that appears in the topmost
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* level of the hydrated result. A typical example are the objects of the type
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* specified by the FROM clause in a DQL query.
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*
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* @param array $data The data of the row to process.
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* @param array $cache
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* @param array $result
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*/
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protected function _hydrateRow(array $data, array &$cache, array &$result)
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{
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// Initialize
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$id = $this->_idTemplate; // initialize the id-memory
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$nonemptyComponents = array();
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// Split the row data into chunks of class data.
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$rowData = $this->_gatherRowData($data, $cache, $id, $nonemptyComponents);
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// Extract scalar values. They're appended at the end.
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if (isset($rowData['scalars'])) {
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$scalars = $rowData['scalars'];
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unset($rowData['scalars']);
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if (empty($rowData)) {
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++$this->_resultCounter;
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}
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}
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// Hydrate the data chunks
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foreach ($rowData as $dqlAlias => $data) {
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$entityName = $this->_rsm->aliasMap[$dqlAlias];
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if (isset($this->_rsm->parentAliasMap[$dqlAlias])) {
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// It's a joined result
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$parentAlias = $this->_rsm->parentAliasMap[$dqlAlias];
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// Get a reference to the parent object to which the joined element belongs.
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if ($this->_rsm->isMixed && isset($this->_rootAliases[$parentAlias])) {
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$first = reset($this->_resultPointers);
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$parentObject = $this->_resultPointers[$parentAlias][key($first)];
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} else if (isset($this->_resultPointers[$parentAlias])) {
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$parentObject = $this->_resultPointers[$parentAlias];
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} else {
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// Parent object of relation not found, so skip it.
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continue;
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}
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$parentClass = $this->_ce[$this->_rsm->aliasMap[$parentAlias]];
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$oid = spl_object_hash($parentObject);
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$relationField = $this->_rsm->relationMap[$dqlAlias];
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$relation = $parentClass->associationMappings[$relationField];
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$reflField = $parentClass->reflFields[$relationField];
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// Check the type of the relation (many or single-valued)
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if ( ! $relation->isOneToOne()) {
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// PATH A: Collection-valued association
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if (isset($nonemptyComponents[$dqlAlias])) {
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$collKey = $oid . $relationField;
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if (isset($this->_initializedCollections[$collKey])) {
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$reflFieldValue = $this->_initializedCollections[$collKey];
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} else if ( ! isset($this->_existingCollections[$collKey])) {
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$reflFieldValue = $this->_initRelatedCollection($parentObject, $parentClass, $relationField);
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}
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$indexExists = isset($this->_identifierMap[$dqlAlias][$id[$dqlAlias]]);
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$index = $indexExists ? $this->_identifierMap[$dqlAlias][$id[$dqlAlias]] : false;
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$indexIsValid = $index !== false ? isset($reflFieldValue[$index]) : false;
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if ( ! $indexExists || ! $indexIsValid) {
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if (isset($this->_existingCollections[$collKey])) {
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// Collection exists, only look for the element in the identity map.
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if ($element = $this->_getEntityFromIdentityMap($entityName, $data)) {
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$this->_resultPointers[$dqlAlias] = $element;
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} else {
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unset($this->_resultPointers[$dqlAlias]);
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}
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} else {
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$element = $this->_getEntity($data, $dqlAlias);
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if (isset($this->_rsm->indexByMap[$dqlAlias])) {
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$field = $this->_rsm->indexByMap[$dqlAlias];
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$indexValue = $this->_ce[$entityName]->reflFields[$field]->getValue($element);
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$reflFieldValue->hydrateSet($indexValue, $element);
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$this->_identifierMap[$dqlAlias][$id[$dqlAlias]] = $indexValue;
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} else {
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$reflFieldValue->hydrateAdd($element);
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$reflFieldValue->last();
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$this->_identifierMap[$dqlAlias][$id[$dqlAlias]] = $reflFieldValue->key();
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}
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// Update result pointer
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$this->_resultPointers[$dqlAlias] = $element;
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}
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} else {
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// Update result pointer
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$this->_resultPointers[$dqlAlias] = $reflFieldValue[$index];
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}
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} else if ( ! $reflField->getValue($parentObject)) {
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$coll = new PersistentCollection($this->_em, $this->_ce[$entityName], new ArrayCollection);
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$reflField->setValue($parentObject, $coll);
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$this->_uow->setOriginalEntityProperty($oid, $relationField, $coll);
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}
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} else {
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// PATH B: Single-valued association
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$reflFieldValue = $reflField->getValue($parentObject);
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if ( ! $reflFieldValue || isset($this->_hints[Query::HINT_REFRESH])) {
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if (isset($nonemptyComponents[$dqlAlias])) {
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$element = $this->_getEntity($data, $dqlAlias);
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$reflField->setValue($parentObject, $element);
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$this->_uow->setOriginalEntityProperty($oid, $relationField, $element);
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$targetClass = $this->_ce[$relation->targetEntityName];
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if ($relation->isOwningSide) {
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// If there is an inverse mapping on the target class its bidirectional
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if (isset($targetClass->inverseMappings[$relation->sourceEntityName][$relationField])) {
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$inverseAssoc = $targetClass->inverseMappings[$relation->sourceEntityName][$relationField];
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if ($inverseAssoc->isOneToOne()) {
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$targetClass->reflFields[$inverseAssoc->sourceFieldName]->setValue($element, $parentObject);
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$this->_uow->setOriginalEntityProperty(spl_object_hash($element), $inverseAssoc->sourceFieldName, $parentObject);
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}
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} else if ($parentClass === $targetClass && $relation->mappedBy) {
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// Special case: bi-directional self-referencing one-one on the same class
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$targetClass->reflFields[$relationField]->setValue($element, $parentObject);
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}
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} else {
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// For sure bidirectional, as there is no inverse side in unidirectional mappings
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$targetClass->reflFields[$relation->mappedBy]->setValue($element, $parentObject);
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$this->_uow->setOriginalEntityProperty(spl_object_hash($element), $relation->mappedBy, $parentObject);
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}
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// Update result pointer
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$this->_resultPointers[$dqlAlias] = $element;
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}
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// else leave $reflFieldValue null for single-valued associations
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} else {
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// Update result pointer
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$this->_resultPointers[$dqlAlias] = $reflFieldValue;
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}
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}
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} else {
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// PATH C: Its a root result element
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$this->_rootAliases[$dqlAlias] = true; // Mark as root alias
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if ( ! isset($this->_identifierMap[$dqlAlias][$id[$dqlAlias]])) {
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$element = $this->_getEntity($rowData[$dqlAlias], $dqlAlias);
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if (isset($this->_rsm->indexByMap[$dqlAlias])) {
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$field = $this->_rsm->indexByMap[$dqlAlias];
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$key = $this->_ce[$entityName]->reflFields[$field]->getValue($element);
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if ($this->_rsm->isMixed) {
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$element = array($key => $element);
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$result[] = $element;
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$this->_identifierMap[$dqlAlias][$id[$dqlAlias]] = $this->_resultCounter;
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++$this->_resultCounter;
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} else {
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$result[$key] = $element;
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$this->_identifierMap[$dqlAlias][$id[$dqlAlias]] = $key;
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}
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} else {
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if ($this->_rsm->isMixed) {
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$element = array(0 => $element);
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}
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$result[] = $element;
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$this->_identifierMap[$dqlAlias][$id[$dqlAlias]] = $this->_resultCounter;
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++$this->_resultCounter;
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}
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// Update result pointer
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$this->_resultPointers[$dqlAlias] = $element;
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} else {
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// Update result pointer
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$index = $this->_identifierMap[$dqlAlias][$id[$dqlAlias]];
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$this->_resultPointers[$dqlAlias] = $result[$index];
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/*if ($this->_rsm->isMixed) {
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$result[] = $result[$index];
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++$this->_resultCounter;
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}*/
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}
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}
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}
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// Append scalar values to mixed result sets
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if (isset($scalars)) {
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foreach ($scalars as $name => $value) {
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$result[$this->_resultCounter - 1][$name] = $value;
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}
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}
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}
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}
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