Actualización

vendor/doctrine/orm/lib/Doctrine/ORM/Internal/CommitOrderCalculator.php

@@ -0,0 +1,195 @@
+<?php
+
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\ORM\Internal;
+
+/**
+ * CommitOrderCalculator implements topological sorting, which is an ordering
+ * algorithm for directed graphs (DG) and/or directed acyclic graphs (DAG) by
+ * using a depth-first searching (DFS) to traverse the graph built in memory.
+ * This algorithm have a linear running time based on nodes (V) and dependency
+ * between the nodes (E), resulting in a computational complexity of O(V + E).
+ *
+ * @since  2.0
+ * @author Guilherme Blanco <guilhermeblanco@hotmail.com>
+ * @author Roman Borschel <roman@code-factory.org>
+ */
+class CommitOrderCalculator
+{
+    const NOT_VISITED = 0;
+    const IN_PROGRESS = 1;
+    const VISITED     = 2;
+
+    /**
+     * Matrix of nodes (aka. vertex).
+     * Keys are provided hashes and values are the node definition objects.
+     *
+     * The node state definition contains the following properties:
+     *
+     * - <b>state</b> (integer)
+     * Whether the node is NOT_VISITED or IN_PROGRESS
+     *
+     * - <b>value</b> (object)
+     * Actual node value
+     *
+     * - <b>dependencyList</b> (array<string>)
+     * Map of node dependencies defined as hashes.
+     *
+     * @var array<\stdClass>
+     */
+    private $nodeList = [];
+
+    /**
+     * Volatile variable holding calculated nodes during sorting process.
+     *
+     * @var array
+     */
+    private $sortedNodeList = [];
+
+    /**
+     * Checks for node (vertex) existence in graph.
+     *
+     * @param string $hash
+     *
+     * @return boolean
+     */
+    public function hasNode($hash)
+    {
+        return isset($this->nodeList[$hash]);
+    }
+
+    /**
+     * Adds a new node (vertex) to the graph, assigning its hash and value.
+     *
+     * @param string $hash
+     * @param object $node
+     *
+     * @return void
+     */
+    public function addNode($hash, $node)
+    {
+        $vertex = new \stdClass();
+
+        $vertex->hash           = $hash;
+        $vertex->state          = self::NOT_VISITED;
+        $vertex->value          = $node;
+        $vertex->dependencyList = [];
+
+        $this->nodeList[$hash] = $vertex;
+    }
+
+    /**
+     * Adds a new dependency (edge) to the graph using their hashes.
+     *
+     * @param string  $fromHash
+     * @param string  $toHash
+     * @param integer $weight
+     *
+     * @return void
+     */
+    public function addDependency($fromHash, $toHash, $weight)
+    {
+        $vertex = $this->nodeList[$fromHash];
+        $edge   = new \stdClass();
+
+        $edge->from   = $fromHash;
+        $edge->to     = $toHash;
+        $edge->weight = $weight;
+
+        $vertex->dependencyList[$toHash] = $edge;
+    }
+
+    /**
+     * Return a valid order list of all current nodes.
+     * The desired topological sorting is the reverse post order of these searches.
+     *
+     * {@internal Highly performance-sensitive method.}
+     *
+     * @return array
+     */
+    public function sort()
+    {
+        foreach ($this->nodeList as $vertex) {
+            if ($vertex->state !== self::NOT_VISITED) {
+                continue;
+            }
+
+            $this->visit($vertex);
+        }
+
+        $sortedList = $this->sortedNodeList;
+
+        $this->nodeList       = [];
+        $this->sortedNodeList = [];
+
+        return array_reverse($sortedList);
+    }
+
+    /**
+     * Visit a given node definition for reordering.
+     *
+     * {@internal Highly performance-sensitive method.}
+     *
+     * @param \stdClass $vertex
+     */
+    private function visit($vertex)
+    {
+        $vertex->state = self::IN_PROGRESS;
+
+        foreach ($vertex->dependencyList as $edge) {
+            $adjacentVertex = $this->nodeList[$edge->to];
+
+            switch ($adjacentVertex->state) {
+                case self::VISITED:
+                    // Do nothing, since node was already visited
+                    break;
+
+                case self::IN_PROGRESS:
+                    if (isset($adjacentVertex->dependencyList[$vertex->hash]) &&
+                        $adjacentVertex->dependencyList[$vertex->hash]->weight < $edge->weight) {
+
+                        // If we have some non-visited dependencies in the in-progress dependency, we
+                        // need to visit them before adding the node.
+                        foreach ($adjacentVertex->dependencyList as $adjacentEdge) {
+                            $adjacentEdgeVertex = $this->nodeList[$adjacentEdge->to];
+
+                            if ($adjacentEdgeVertex->state === self::NOT_VISITED) {
+                                $this->visit($adjacentEdgeVertex);
+                            }
+                        }
+
+                        $adjacentVertex->state = self::VISITED;
+
+                        $this->sortedNodeList[] = $adjacentVertex->value;
+                    }
+                    break;
+
+                case self::NOT_VISITED:
+                    $this->visit($adjacentVertex);
+            }
+        }
+
+        if ($vertex->state !== self::VISITED) {
+            $vertex->state = self::VISITED;
+
+            $this->sortedNodeList[] = $vertex->value;
+        }
+    }
+}

vendor/doctrine/orm/lib/Doctrine/ORM/Internal/Hydration/AbstractHydrator.php

@@ -0,0 +1,538 @@
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\ORM\Internal\Hydration;
+
+use Doctrine\DBAL\Types\Type;
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\Events;
+use Doctrine\ORM\Mapping\ClassMetadata;
+use Doctrine\ORM\Tools\Pagination\LimitSubqueryWalker;
+use PDO;
+use function array_map;
+use function in_array;
+
+/**
+ * Base class for all hydrators. A hydrator is a class that provides some form
+ * of transformation of an SQL result set into another structure.
+ *
+ * @since  2.0
+ * @author Konsta Vesterinen <kvesteri@cc.hut.fi>
+ * @author Roman Borschel <roman@code-factory.org>
+ * @author Guilherme Blanco <guilhermeblanoc@hotmail.com>
+ */
+abstract class AbstractHydrator
+{
+    /**
+     * The ResultSetMapping.
+     *
+     * @var \Doctrine\ORM\Query\ResultSetMapping
+     */
+    protected $_rsm;
+
+    /**
+     * The EntityManager instance.
+     *
+     * @var EntityManagerInterface
+     */
+    protected $_em;
+
+    /**
+     * The dbms Platform instance.
+     *
+     * @var \Doctrine\DBAL\Platforms\AbstractPlatform
+     */
+    protected $_platform;
+
+    /**
+     * The UnitOfWork of the associated EntityManager.
+     *
+     * @var \Doctrine\ORM\UnitOfWork
+     */
+    protected $_uow;
+
+    /**
+     * Local ClassMetadata cache to avoid going to the EntityManager all the time.
+     *
+     * @var array
+     */
+    protected $_metadataCache = [];
+
+    /**
+     * The cache used during row-by-row hydration.
+     *
+     * @var array
+     */
+    protected $_cache = [];
+
+    /**
+     * The statement that provides the data to hydrate.
+     *
+     * @var \Doctrine\DBAL\Driver\Statement
+     */
+    protected $_stmt;
+
+    /**
+     * The query hints.
+     *
+     * @var array
+     */
+    protected $_hints;
+
+    /**
+     * Initializes a new instance of a class derived from <tt>AbstractHydrator</tt>.
+     *
+     * @param EntityManagerInterface $em The EntityManager to use.
+     */
+    public function __construct(EntityManagerInterface $em)
+    {
+        $this->_em       = $em;
+        $this->_platform = $em->getConnection()->getDatabasePlatform();
+        $this->_uow      = $em->getUnitOfWork();
+    }
+
+    /**
+     * Initiates a row-by-row hydration.
+     *
+     * @param object $stmt
+     * @param object $resultSetMapping
+     * @param array  $hints
+     *
+     * @return IterableResult
+     */
+    public function iterate($stmt, $resultSetMapping, array $hints = [])
+    {
+        $this->_stmt  = $stmt;
+        $this->_rsm   = $resultSetMapping;
+        $this->_hints = $hints;
+
+        $evm = $this->_em->getEventManager();
+
+        $evm->addEventListener([Events::onClear], $this);
+
+        $this->prepare();
+
+        return new IterableResult($this);
+    }
+
+    /**
+     * Hydrates all rows returned by the passed statement instance at once.
+     *
+     * @param object $stmt
+     * @param object $resultSetMapping
+     * @param array  $hints
+     *
+     * @return array
+     */
+    public function hydrateAll($stmt, $resultSetMapping, array $hints = [])
+    {
+        $this->_stmt  = $stmt;
+        $this->_rsm   = $resultSetMapping;
+        $this->_hints = $hints;
+
+        $this->_em->getEventManager()->addEventListener([Events::onClear], $this);
+
+        $this->prepare();
+
+        $result = $this->hydrateAllData();
+
+        $this->cleanup();
+
+        return $result;
+    }
+
+    /**
+     * Hydrates a single row returned by the current statement instance during
+     * row-by-row hydration with {@link iterate()}.
+     *
+     * @return mixed
+     */
+    public function hydrateRow()
+    {
+        $row = $this->_stmt->fetch(PDO::FETCH_ASSOC);
+
+        if ( ! $row) {
+            $this->cleanup();
+
+            return false;
+        }
+
+        $result = [];
+
+        $this->hydrateRowData($row, $result);
+
+        return $result;
+    }
+
+    /**
+     * When executed in a hydrate() loop we have to clear internal state to
+     * decrease memory consumption.
+     *
+     * @param mixed $eventArgs
+     *
+     * @return void
+     */
+    public function onClear($eventArgs)
+    {
+    }
+
+    /**
+     * Executes one-time preparation tasks, once each time hydration is started
+     * through {@link hydrateAll} or {@link iterate()}.
+     *
+     * @return void
+     */
+    protected function prepare()
+    {
+    }
+
+    /**
+     * Executes one-time cleanup tasks at the end of a hydration that was initiated
+     * through {@link hydrateAll} or {@link iterate()}.
+     *
+     * @return void
+     */
+    protected function cleanup()
+    {
+        $this->_stmt->closeCursor();
+
+        $this->_stmt          = null;
+        $this->_rsm           = null;
+        $this->_cache         = [];
+        $this->_metadataCache = [];
+
+        $this
+            ->_em
+            ->getEventManager()
+            ->removeEventListener([Events::onClear], $this);
+    }
+
+    /**
+     * Hydrates a single row from the current statement instance.
+     *
+     * Template method.
+     *
+     * @param mixed[] $row    The row data.
+     * @param mixed[] $result The result to fill.
+     *
+     * @return void
+     *
+     * @throws HydrationException
+     */
+    protected function hydrateRowData(array $row, array &$result)
+    {
+        throw new HydrationException("hydrateRowData() not implemented by this hydrator.");
+    }
+
+    /**
+     * Hydrates all rows from the current statement instance at once.
+     *
+     * @return array
+     */
+    abstract protected function hydrateAllData();
+
+    /**
+     * Processes a row of the result set.
+     *
+     * Used for identity-based hydration (HYDRATE_OBJECT and HYDRATE_ARRAY).
+     * Puts the elements of a result row into a new array, grouped by the dql alias
+     * they belong to. The column names in the result set are mapped to their
+     * field names during this procedure as well as any necessary conversions on
+     * the values applied. Scalar values are kept in a specific key 'scalars'.
+     *
+     * @param array  $data               SQL Result Row.
+     * @param array &$id                 Dql-Alias => ID-Hash.
+     * @param array &$nonemptyComponents Does this DQL-Alias has at least one non NULL value?
+     *
+     * @return array<string, array<string, mixed>> An array with all the fields
+     *                                             (name => value) of the data
+     *                                             row, grouped by their
+     *                                             component alias.
+     *
+     * @psalm-return array{
+     *                   data: array<array-key, array>,
+     *                   newObjects?: array<array-key, array{
+     *                       class: mixed,
+     *                       args?: array
+     *                   }>,
+     *                   scalars?: array
+     *               }
+     */
+    protected function gatherRowData(array $data, array &$id, array &$nonemptyComponents)
+    {
+        $rowData = ['data' => []];
+
+        foreach ($data as $key => $value) {
+            if (($cacheKeyInfo = $this->hydrateColumnInfo($key)) === null) {
+                continue;
+            }
+
+            $fieldName = $cacheKeyInfo['fieldName'];
+
+            switch (true) {
+                case (isset($cacheKeyInfo['isNewObjectParameter'])):
+                    $argIndex = $cacheKeyInfo['argIndex'];
+                    $objIndex = $cacheKeyInfo['objIndex'];
+                    $type     = $cacheKeyInfo['type'];
+                    $value    = $type->convertToPHPValue($value, $this->_platform);
+
+                    $rowData['newObjects'][$objIndex]['class']           = $cacheKeyInfo['class'];
+                    $rowData['newObjects'][$objIndex]['args'][$argIndex] = $value;
+                    break;
+
+                case (isset($cacheKeyInfo['isScalar'])):
+                    $type  = $cacheKeyInfo['type'];
+                    $value = $type->convertToPHPValue($value, $this->_platform);
+
+                    $rowData['scalars'][$fieldName] = $value;
+                    break;
+
+                //case (isset($cacheKeyInfo['isMetaColumn'])):
+                default:
+                    $dqlAlias = $cacheKeyInfo['dqlAlias'];
+                    $type     = $cacheKeyInfo['type'];
+
+                    // If there are field name collisions in the child class, then we need
+                    // to only hydrate if we are looking at the correct discriminator value
+                    if (isset($cacheKeyInfo['discriminatorColumn'], $data[$cacheKeyInfo['discriminatorColumn']])
+                        && ! in_array((string) $data[$cacheKeyInfo['discriminatorColumn']], $cacheKeyInfo['discriminatorValues'], true)
+                    ) {
+                        break;
+                    }
+
+                    // in an inheritance hierarchy the same field could be defined several times.
+                    // We overwrite this value so long we don't have a non-null value, that value we keep.
+                    // Per definition it cannot be that a field is defined several times and has several values.
+                    if (isset($rowData['data'][$dqlAlias][$fieldName])) {
+                        break;
+                    }
+
+                    $rowData['data'][$dqlAlias][$fieldName] = $type
+                        ? $type->convertToPHPValue($value, $this->_platform)
+                        : $value;
+
+                    if ($cacheKeyInfo['isIdentifier'] && $value !== null) {
+                        $id[$dqlAlias] .= '|' . $value;
+                        $nonemptyComponents[$dqlAlias] = true;
+                    }
+                    break;
+            }
+        }
+
+        return $rowData;
+    }
+
+    /**
+     * Processes a row of the result set.
+     *
+     * Used for HYDRATE_SCALAR. This is a variant of _gatherRowData() that
+     * simply converts column names to field names and properly converts the
+     * values according to their types. The resulting row has the same number
+     * of elements as before.
+     *
+     * @param array $data
+     *
+     * @return array The processed row.
+     */
+    protected function gatherScalarRowData(&$data)
+    {
+        $rowData = [];
+
+        foreach ($data as $key => $value) {
+            if (($cacheKeyInfo = $this->hydrateColumnInfo($key)) === null) {
+                continue;
+            }
+
+            $fieldName = $cacheKeyInfo['fieldName'];
+
+            // WARNING: BC break! We know this is the desired behavior to type convert values, but this
+            // erroneous behavior exists since 2.0 and we're forced to keep compatibility.
+            if (! isset($cacheKeyInfo['isScalar'])) {
+                $type  = $cacheKeyInfo['type'];
+                $value = $type ? $type->convertToPHPValue($value, $this->_platform) : $value;
+
+                $fieldName = $cacheKeyInfo['dqlAlias'] . '_' . $fieldName;
+            }
+
+            $rowData[$fieldName] = $value;
+        }
+
+        return $rowData;
+    }
+
+    /**
+     * Retrieve column information from ResultSetMapping.
+     *
+     * @param string $key Column name
+     *
+     * @return array|null
+     */
+    protected function hydrateColumnInfo($key)
+    {
+        if (isset($this->_cache[$key])) {
+            return $this->_cache[$key];
+        }
+
+        switch (true) {
+            // NOTE: Most of the times it's a field mapping, so keep it first!!!
+            case (isset($this->_rsm->fieldMappings[$key])):
+                $classMetadata = $this->getClassMetadata($this->_rsm->declaringClasses[$key]);
+                $fieldName     = $this->_rsm->fieldMappings[$key];
+                $fieldMapping  = $classMetadata->fieldMappings[$fieldName];
+                $ownerMap      = $this->_rsm->columnOwnerMap[$key];
+                $columnInfo    = [
+                    'isIdentifier' => \in_array($fieldName, $classMetadata->identifier, true),
+                    'fieldName'    => $fieldName,
+                    'type'         => Type::getType($fieldMapping['type']),
+                    'dqlAlias'     => $ownerMap,
+                ];
+
+                // the current discriminator value must be saved in order to disambiguate fields hydration,
+                // should there be field name collisions
+                if ($classMetadata->parentClasses && isset($this->_rsm->discriminatorColumns[$ownerMap])) {
+                    return $this->_cache[$key] = \array_merge(
+                        $columnInfo,
+                        [
+                            'discriminatorColumn' => $this->_rsm->discriminatorColumns[$ownerMap],
+                            'discriminatorValue'  => $classMetadata->discriminatorValue,
+                            'discriminatorValues' => $this->getDiscriminatorValues($classMetadata),
+                        ]
+                    );
+                }
+
+                return $this->_cache[$key] = $columnInfo;
+
+            case (isset($this->_rsm->newObjectMappings[$key])):
+                // WARNING: A NEW object is also a scalar, so it must be declared before!
+                $mapping = $this->_rsm->newObjectMappings[$key];
+
+                return $this->_cache[$key] = [
+                    'isScalar'             => true,
+                    'isNewObjectParameter' => true,
+                    'fieldName'            => $this->_rsm->scalarMappings[$key],
+                    'type'                 => Type::getType($this->_rsm->typeMappings[$key]),
+                    'argIndex'             => $mapping['argIndex'],
+                    'objIndex'             => $mapping['objIndex'],
+                    'class'                => new \ReflectionClass($mapping['className']),
+                ];
+
+            case isset($this->_rsm->scalarMappings[$key], $this->_hints[LimitSubqueryWalker::FORCE_DBAL_TYPE_CONVERSION]):
+                return $this->_cache[$key] = [
+                    'fieldName' => $this->_rsm->scalarMappings[$key],
+                    'type'      => Type::getType($this->_rsm->typeMappings[$key]),
+                    'dqlAlias'  => '',
+                ];
+            case (isset($this->_rsm->scalarMappings[$key])):
+                return $this->_cache[$key] = [
+                    'isScalar'  => true,
+                    'fieldName' => $this->_rsm->scalarMappings[$key],
+                    'type'      => Type::getType($this->_rsm->typeMappings[$key]),
+                ];
+
+            case (isset($this->_rsm->metaMappings[$key])):
+                // Meta column (has meaning in relational schema only, i.e. foreign keys or discriminator columns).
+                $fieldName = $this->_rsm->metaMappings[$key];
+                $dqlAlias  = $this->_rsm->columnOwnerMap[$key];
+                $type      = isset($this->_rsm->typeMappings[$key])
+                    ? Type::getType($this->_rsm->typeMappings[$key])
+                    : null;
+
+                // Cache metadata fetch
+                $this->getClassMetadata($this->_rsm->aliasMap[$dqlAlias]);
+
+                return $this->_cache[$key] = [
+                    'isIdentifier' => isset($this->_rsm->isIdentifierColumn[$dqlAlias][$key]),
+                    'isMetaColumn' => true,
+                    'fieldName'    => $fieldName,
+                    'type'         => $type,
+                    'dqlAlias'     => $dqlAlias,
+                ];
+        }
+
+        // this column is a left over, maybe from a LIMIT query hack for example in Oracle or DB2
+        // maybe from an additional column that has not been defined in a NativeQuery ResultSetMapping.
+        return null;
+    }
+
+    /**
+     * @return string[]
+     */
+    private function getDiscriminatorValues(ClassMetadata $classMetadata) : array
+    {
+        $values = array_map(
+            function (string $subClass) : string {
+                return (string) $this->getClassMetadata($subClass)->discriminatorValue;
+            },
+            $classMetadata->subClasses
+        );
+
+        $values[] = (string) $classMetadata->discriminatorValue;
+
+        return $values;
+    }
+
+    /**
+     * Retrieve ClassMetadata associated to entity class name.
+     *
+     * @param string $className
+     *
+     * @return \Doctrine\ORM\Mapping\ClassMetadata
+     */
+    protected function getClassMetadata($className)
+    {
+        if ( ! isset($this->_metadataCache[$className])) {
+            $this->_metadataCache[$className] = $this->_em->getClassMetadata($className);
+        }
+
+        return $this->_metadataCache[$className];
+    }
+
+    /**
+     * Register entity as managed in UnitOfWork.
+     *
+     * @param ClassMetadata $class
+     * @param object        $entity
+     * @param array         $data
+     *
+     * @return void
+     *
+     * @todo The "$id" generation is the same of UnitOfWork#createEntity. Remove this duplication somehow
+     */
+    protected function registerManaged(ClassMetadata $class, $entity, array $data)
+    {
+        if ($class->isIdentifierComposite) {
+            $id = [];
+
+            foreach ($class->identifier as $fieldName) {
+                $id[$fieldName] = isset($class->associationMappings[$fieldName])
+                    ? $data[$class->associationMappings[$fieldName]['joinColumns'][0]['name']]
+                    : $data[$fieldName];
+            }
+        } else {
+            $fieldName = $class->identifier[0];
+            $id        = [
+                $fieldName => isset($class->associationMappings[$fieldName])
+                    ? $data[$class->associationMappings[$fieldName]['joinColumns'][0]['name']]
+                    : $data[$fieldName]
+            ];
+        }
+
+        $this->_em->getUnitOfWork()->registerManaged($entity, $id, $data);
+    }
+}

vendor/doctrine/orm/lib/Doctrine/ORM/Internal/Hydration/ArrayHydrator.php

@@ -0,0 +1,307 @@
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\ORM\Internal\Hydration;
+
+use PDO;
+use Doctrine\ORM\Mapping\ClassMetadata;
+
+/**
+ * The ArrayHydrator produces a nested array "graph" that is often (not always)
+ * interchangeable with the corresponding object graph for read-only access.
+ *
+ * @since  2.0
+ * @author Roman Borschel <roman@code-factory.org>
+ * @author Guilherme Blanco <guilhermeblanoc@hotmail.com>
+ */
+class ArrayHydrator extends AbstractHydrator
+{
+    /**
+     * @var array
+     */
+    private $_rootAliases = [];
+
+    /**
+     * @var bool
+     */
+    private $_isSimpleQuery = false;
+
+    /**
+     * @var array
+     */
+    private $_identifierMap = [];
+
+    /**
+     * @var array
+     */
+    private $_resultPointers = [];
+
+    /**
+     * @var array
+     */
+    private $_idTemplate = [];
+
+    /**
+     * @var int
+     */
+    private $_resultCounter = 0;
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function prepare()
+    {
+        $this->_isSimpleQuery = count($this->_rsm->aliasMap) <= 1;
+
+        foreach ($this->_rsm->aliasMap as $dqlAlias => $className) {
+            $this->_identifierMap[$dqlAlias]  = [];
+            $this->_resultPointers[$dqlAlias] = [];
+            $this->_idTemplate[$dqlAlias]     = '';
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function hydrateAllData()
+    {
+        $result = [];
+
+        while ($data = $this->_stmt->fetch(PDO::FETCH_ASSOC)) {
+            $this->hydrateRowData($data, $result);
+        }
+
+        return $result;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function hydrateRowData(array $row, array &$result)
+    {
+        // 1) Initialize
+        $id = $this->_idTemplate; // initialize the id-memory
+        $nonemptyComponents = [];
+        $rowData = $this->gatherRowData($row, $id, $nonemptyComponents);
+
+        // 2) Now hydrate the data found in the current row.
+        foreach ($rowData['data'] as $dqlAlias => $data) {
+            $index = false;
+
+            if (isset($this->_rsm->parentAliasMap[$dqlAlias])) {
+                // It's a joined result
+
+                $parent = $this->_rsm->parentAliasMap[$dqlAlias];
+                $path   = $parent . '.' . $dqlAlias;
+
+                // missing parent data, skipping as RIGHT JOIN hydration is not supported.
+                if ( ! isset($nonemptyComponents[$parent]) ) {
+                    continue;
+                }
+
+                // Get a reference to the right element in the result tree.
+                // This element will get the associated element attached.
+                if ($this->_rsm->isMixed && isset($this->_rootAliases[$parent])) {
+                    $first = reset($this->_resultPointers);
+                    // TODO: Exception if $key === null ?
+                    $baseElement =& $this->_resultPointers[$parent][key($first)];
+                } else if (isset($this->_resultPointers[$parent])) {
+                    $baseElement =& $this->_resultPointers[$parent];
+                } else {
+                    unset($this->_resultPointers[$dqlAlias]); // Ticket #1228
+
+                    continue;
+                }
+
+                $relationAlias = $this->_rsm->relationMap[$dqlAlias];
+                $parentClass   = $this->_metadataCache[$this->_rsm->aliasMap[$parent]];
+                $relation      = $parentClass->associationMappings[$relationAlias];
+
+                // Check the type of the relation (many or single-valued)
+                if ( ! ($relation['type'] & ClassMetadata::TO_ONE)) {
+                    $oneToOne = false;
+
+                    if ( ! isset($baseElement[$relationAlias])) {
+                        $baseElement[$relationAlias] = [];
+                    }
+
+                    if (isset($nonemptyComponents[$dqlAlias])) {
+                        $indexExists  = isset($this->_identifierMap[$path][$id[$parent]][$id[$dqlAlias]]);
+                        $index        = $indexExists ? $this->_identifierMap[$path][$id[$parent]][$id[$dqlAlias]] : false;
+                        $indexIsValid = $index !== false ? isset($baseElement[$relationAlias][$index]) : false;
+
+                        if ( ! $indexExists || ! $indexIsValid) {
+                            $element = $data;
+
+                            if (isset($this->_rsm->indexByMap[$dqlAlias])) {
+                                $baseElement[$relationAlias][$row[$this->_rsm->indexByMap[$dqlAlias]]] = $element;
+                            } else {
+                                $baseElement[$relationAlias][] = $element;
+                            }
+
+                            end($baseElement[$relationAlias]);
+
+                            $this->_identifierMap[$path][$id[$parent]][$id[$dqlAlias]] = key($baseElement[$relationAlias]);
+                        }
+                    }
+                } else {
+                    $oneToOne = true;
+
+                    if (
+                        ( ! isset($nonemptyComponents[$dqlAlias])) &&
+                        ( ! isset($baseElement[$relationAlias]))
+                    ) {
+                        $baseElement[$relationAlias] = null;
+                    } else if ( ! isset($baseElement[$relationAlias])) {
+                        $baseElement[$relationAlias] = $data;
+                    }
+                }
+
+                $coll =& $baseElement[$relationAlias];
+
+                if (is_array($coll)) {
+                    $this->updateResultPointer($coll, $index, $dqlAlias, $oneToOne);
+                }
+            } else {
+                // It's a root result element
+
+                $this->_rootAliases[$dqlAlias] = true; // Mark as root
+                $entityKey = $this->_rsm->entityMappings[$dqlAlias] ?: 0;
+
+                // if this row has a NULL value for the root result id then make it a null result.
+                if ( ! isset($nonemptyComponents[$dqlAlias]) ) {
+                    $result[] = $this->_rsm->isMixed
+                        ? [$entityKey => null]
+                        : null;
+
+                    $resultKey = $this->_resultCounter;
+                    ++$this->_resultCounter;
+
+                    continue;
+                }
+
+                // Check for an existing element
+                if ($this->_isSimpleQuery || ! isset($this->_identifierMap[$dqlAlias][$id[$dqlAlias]])) {
+                    $element = $this->_rsm->isMixed
+                        ? [$entityKey => $data]
+                        : $data;
+
+                    if (isset($this->_rsm->indexByMap[$dqlAlias])) {
+                        $resultKey = $row[$this->_rsm->indexByMap[$dqlAlias]];
+                        $result[$resultKey] = $element;
+                    } else {
+                        $resultKey = $this->_resultCounter;
+                        $result[] = $element;
+
+                        ++$this->_resultCounter;
+                    }
+
+                    $this->_identifierMap[$dqlAlias][$id[$dqlAlias]] = $resultKey;
+                } else {
+                    $index = $this->_identifierMap[$dqlAlias][$id[$dqlAlias]];
+                    $resultKey = $index;
+                }
+
+                $this->updateResultPointer($result, $index, $dqlAlias, false);
+            }
+        }
+
+        if ( ! isset($resultKey)) {
+            $this->_resultCounter++;
+        }
+
+        // Append scalar values to mixed result sets
+        if (isset($rowData['scalars'])) {
+            if ( ! isset($resultKey)) {
+                // this only ever happens when no object is fetched (scalar result only)
+                $resultKey = isset($this->_rsm->indexByMap['scalars'])
+                    ? $row[$this->_rsm->indexByMap['scalars']]
+                    : $this->_resultCounter - 1;
+            }
+
+            foreach ($rowData['scalars'] as $name => $value) {
+                $result[$resultKey][$name] = $value;
+            }
+        }
+
+        // Append new object to mixed result sets
+        if (isset($rowData['newObjects'])) {
+            if ( ! isset($resultKey)) {
+                $resultKey = $this->_resultCounter - 1;
+            }
+
+            $scalarCount = (isset($rowData['scalars'])? count($rowData['scalars']): 0);
+
+            foreach ($rowData['newObjects'] as $objIndex => $newObject) {
+                $class  = $newObject['class'];
+                $args   = $newObject['args'];
+                $obj    = $class->newInstanceArgs($args);
+
+                if (count($args) == $scalarCount || ($scalarCount == 0 && count($rowData['newObjects']) == 1)) {
+                    $result[$resultKey] = $obj;
+
+                    continue;
+                }
+
+                $result[$resultKey][$objIndex] = $obj;
+            }
+        }
+    }
+
+    /**
+     * Updates the result pointer for an Entity. The result pointers point to the
+     * last seen instance of each Entity type. This is used for graph construction.
+     *
+     * @param array           $coll     The element.
+     * @param boolean|integer $index    Index of the element in the collection.
+     * @param string          $dqlAlias
+     * @param boolean         $oneToOne Whether it is a single-valued association or not.
+     *
+     * @return void
+     */
+    private function updateResultPointer(array &$coll, $index, $dqlAlias, $oneToOne)
+    {
+        if ($coll === null) {
+            unset($this->_resultPointers[$dqlAlias]); // Ticket #1228
+
+            return;
+        }
+
+        if ($oneToOne) {
+            $this->_resultPointers[$dqlAlias] =& $coll;
+
+            return;
+        }
+
+        if ($index !== false) {
+            $this->_resultPointers[$dqlAlias] =& $coll[$index];
+
+            return;
+        }
+
+        if ( ! $coll) {
+            return;
+        }
+
+        end($coll);
+        $this->_resultPointers[$dqlAlias] =& $coll[key($coll)];
+
+        return;
+    }
+}

vendor/doctrine/orm/lib/Doctrine/ORM/Internal/Hydration/HydrationException.php

@@ -0,0 +1,105 @@
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\ORM\Internal\Hydration;
+
+class HydrationException extends \Doctrine\ORM\ORMException
+{
+    /**
+     * @return HydrationException
+     */
+    public static function nonUniqueResult()
+    {
+        return new self("The result returned by the query was not unique.");
+    }
+
+    /**
+     * @param string $alias
+     * @param string $parentAlias
+     *
+     * @return HydrationException
+     */
+    public static function parentObjectOfRelationNotFound($alias, $parentAlias)
+    {
+        return new self("The parent object of entity result with alias '$alias' was not found."
+            . " The parent alias is '$parentAlias'.");
+    }
+
+    /**
+     * @param string $dqlAlias
+     *
+     * @return HydrationException
+     */
+    public static function emptyDiscriminatorValue($dqlAlias)
+    {
+        return new self("The DQL alias '" . $dqlAlias . "' contains an entity ".
+            "of an inheritance hierarchy with an empty discriminator value. This means " .
+            "that the database contains inconsistent data with an empty " .
+            "discriminator value in a table row."
+        );
+    }
+
+    /**
+     * @since 2.3
+     *
+     * @param string $entityName
+     * @param string $discrColumnName
+     * @param string $dqlAlias
+     *
+     * @return HydrationException
+     */
+    public static function missingDiscriminatorColumn($entityName, $discrColumnName, $dqlAlias)
+    {
+        return new self(sprintf(
+            'The discriminator column "%s" is missing for "%s" using the DQL alias "%s".',
+            $discrColumnName, $entityName, $dqlAlias
+        ));
+    }
+
+    /**
+     * @since 2.3
+     *
+     * @param string $entityName
+     * @param string $discrColumnName
+     * @param string $dqlAlias
+     *
+     * @return HydrationException
+     */
+    public static function missingDiscriminatorMetaMappingColumn($entityName, $discrColumnName, $dqlAlias)
+    {
+        return new self(sprintf(
+            'The meta mapping for the discriminator column "%s" is missing for "%s" using the DQL alias "%s".',
+            $discrColumnName, $entityName, $dqlAlias
+        ));
+    }
+
+    /**
+     * @param string $discrValue
+     * @param array  $discrMap
+     *
+     * @return HydrationException
+     */
+    public static function invalidDiscriminatorValue($discrValue, $discrMap)
+    {
+        return new self(sprintf(
+            'The discriminator value "%s" is invalid. It must be one of "%s".',
+            $discrValue, implode('", "', $discrMap)
+        ));
+    }
+}

vendor/doctrine/orm/lib/Doctrine/ORM/Internal/Hydration/IterableResult.php

@@ -0,0 +1,110 @@
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\ORM\Internal\Hydration;
+
+/**
+ * Represents a result structure that can be iterated over, hydrating row-by-row
+ * during the iteration. An IterableResult is obtained by AbstractHydrator#iterate().
+ *
+ * @author robo
+ * @since 2.0
+ */
+class IterableResult implements \Iterator
+{
+    /**
+     * @var \Doctrine\ORM\Internal\Hydration\AbstractHydrator
+     */
+    private $_hydrator;
+
+    /**
+     * @var boolean
+     */
+    private $_rewinded = false;
+
+    /**
+     * @var integer
+     */
+    private $_key = -1;
+
+    /**
+     * @var object|null
+     */
+    private $_current = null;
+
+    /**
+     * @param \Doctrine\ORM\Internal\Hydration\AbstractHydrator $hydrator
+     */
+    public function __construct($hydrator)
+    {
+        $this->_hydrator = $hydrator;
+    }
+
+    /**
+     * @return void
+     *
+     * @throws HydrationException
+     */
+    public function rewind()
+    {
+        if ($this->_rewinded == true) {
+            throw new HydrationException("Can only iterate a Result once.");
+        } else {
+            $this->_current = $this->next();
+            $this->_rewinded = true;
+        }
+    }
+
+    /**
+     * Gets the next set of results.
+     *
+     * @return array|false
+     */
+    public function next()
+    {
+        $this->_current = $this->_hydrator->hydrateRow();
+        $this->_key++;
+
+        return $this->_current;
+    }
+
+    /**
+     * @return mixed
+     */
+    public function current()
+    {
+        return $this->_current;
+    }
+
+    /**
+     * @return int
+     */
+    public function key()
+    {
+        return $this->_key;
+    }
+
+    /**
+     * @return bool
+     */
+    public function valid()
+    {
+        return ($this->_current!=false);
+    }
+}

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

@@ -0,0 +1,593 @@
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\ORM\Internal\Hydration;
+
+use Doctrine\ORM\UnitOfWork;
+use PDO;
+use Doctrine\ORM\Mapping\ClassMetadata;
+use Doctrine\ORM\PersistentCollection;
+use Doctrine\ORM\Query;
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\ORM\Proxy\Proxy;
+
+/**
+ * The ObjectHydrator constructs an object graph out of an SQL result set.
+ *
+ * Internal note: Highly performance-sensitive code.
+ *
+ * @since  2.0
+ * @author Roman Borschel <roman@code-factory.org>
+ * @author Guilherme Blanco <guilhermeblanoc@hotmail.com>
+ * @author Fabio B. Silva <fabio.bat.silva@gmail.com>
+ */
+class ObjectHydrator extends AbstractHydrator
+{
+    /**
+     * @var array
+     */
+    private $identifierMap = [];
+
+    /**
+     * @var array
+     */
+    private $resultPointers = [];
+
+    /**
+     * @var array
+     */
+    private $idTemplate = [];
+
+    /**
+     * @var integer
+     */
+    private $resultCounter = 0;
+
+    /**
+     * @var array
+     */
+    private $rootAliases = [];
+
+    /**
+     * @var array
+     */
+    private $initializedCollections = [];
+
+    /**
+     * @var array
+     */
+    private $existingCollections = [];
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function prepare()
+    {
+        if ( ! isset($this->_hints[UnitOfWork::HINT_DEFEREAGERLOAD])) {
+            $this->_hints[UnitOfWork::HINT_DEFEREAGERLOAD] = true;
+        }
+
+        foreach ($this->_rsm->aliasMap as $dqlAlias => $className) {
+            $this->identifierMap[$dqlAlias] = [];
+            $this->idTemplate[$dqlAlias]    = '';
+
+            // Remember which associations are "fetch joined", so that we know where to inject
+            // collection stubs or proxies and where not.
+            if ( ! isset($this->_rsm->relationMap[$dqlAlias])) {
+                continue;
+            }
+
+            $parent = $this->_rsm->parentAliasMap[$dqlAlias];
+
+            if ( ! isset($this->_rsm->aliasMap[$parent])) {
+                throw HydrationException::parentObjectOfRelationNotFound($dqlAlias, $parent);
+            }
+
+            $sourceClassName = $this->_rsm->aliasMap[$parent];
+            $sourceClass     = $this->getClassMetadata($sourceClassName);
+            $assoc           = $sourceClass->associationMappings[$this->_rsm->relationMap[$dqlAlias]];
+
+            $this->_hints['fetched'][$parent][$assoc['fieldName']] = true;
+
+            if ($assoc['type'] === ClassMetadata::MANY_TO_MANY) {
+                continue;
+            }
+
+            // Mark any non-collection opposite sides as fetched, too.
+            if ($assoc['mappedBy']) {
+                $this->_hints['fetched'][$dqlAlias][$assoc['mappedBy']] = true;
+
+                continue;
+            }
+
+            // handle fetch-joined owning side bi-directional one-to-one associations
+            if ($assoc['inversedBy']) {
+                $class        = $this->getClassMetadata($className);
+                $inverseAssoc = $class->associationMappings[$assoc['inversedBy']];
+
+                if ( ! ($inverseAssoc['type'] & ClassMetadata::TO_ONE)) {
+                    continue;
+                }
+
+                $this->_hints['fetched'][$dqlAlias][$inverseAssoc['fieldName']] = true;
+            }
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function cleanup()
+    {
+        $eagerLoad = (isset($this->_hints[UnitOfWork::HINT_DEFEREAGERLOAD])) && $this->_hints[UnitOfWork::HINT_DEFEREAGERLOAD] == true;
+
+        parent::cleanup();
+
+        $this->identifierMap =
+        $this->initializedCollections =
+        $this->existingCollections =
+        $this->resultPointers = [];
+
+        if ($eagerLoad) {
+            $this->_uow->triggerEagerLoads();
+        }
+
+        $this->_uow->hydrationComplete();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function hydrateAllData()
+    {
+        $result = [];
+
+        while ($row = $this->_stmt->fetch(PDO::FETCH_ASSOC)) {
+            $this->hydrateRowData($row, $result);
+        }
+
+        // Take snapshots from all newly initialized collections
+        foreach ($this->initializedCollections as $coll) {
+            $coll->takeSnapshot();
+        }
+
+        return $result;
+    }
+
+    /**
+     * Initializes a related collection.
+     *
+     * @param object        $entity         The entity to which the collection belongs.
+     * @param ClassMetadata $class
+     * @param string        $fieldName      The name of the field on the entity that holds the collection.
+     * @param string        $parentDqlAlias Alias of the parent fetch joining this collection.
+     *
+     * @return \Doctrine\ORM\PersistentCollection
+     */
+    private function initRelatedCollection($entity, $class, $fieldName, $parentDqlAlias)
+    {
+        $oid      = spl_object_hash($entity);
+        $relation = $class->associationMappings[$fieldName];
+        $value    = $class->reflFields[$fieldName]->getValue($entity);
+
+        if ($value === null || is_array($value)) {
+            $value = new ArrayCollection((array) $value);
+        }
+
+        if ( ! $value instanceof PersistentCollection) {
+            $value = new PersistentCollection(
+                $this->_em, $this->_metadataCache[$relation['targetEntity']], $value
+            );
+            $value->setOwner($entity, $relation);
+
+            $class->reflFields[$fieldName]->setValue($entity, $value);
+            $this->_uow->setOriginalEntityProperty($oid, $fieldName, $value);
+
+            $this->initializedCollections[$oid . $fieldName] = $value;
+        } else if (
+            isset($this->_hints[Query::HINT_REFRESH]) ||
+            isset($this->_hints['fetched'][$parentDqlAlias][$fieldName]) &&
+             ! $value->isInitialized()
+        ) {
+            // Is already PersistentCollection, but either REFRESH or FETCH-JOIN and UNINITIALIZED!
+            $value->setDirty(false);
+            $value->setInitialized(true);
+            $value->unwrap()->clear();
+
+            $this->initializedCollections[$oid . $fieldName] = $value;
+        } else {
+            // Is already PersistentCollection, and DON'T REFRESH or FETCH-JOIN!
+            $this->existingCollections[$oid . $fieldName] = $value;
+        }
+
+        return $value;
+    }
+
+    /**
+     * Gets an entity instance.
+     *
+     * @param array  $data     The instance data.
+     * @param string $dqlAlias The DQL alias of the entity's class.
+     *
+     * @return object The entity.
+     *
+     * @throws HydrationException
+     */
+    private function getEntity(array $data, $dqlAlias)
+    {
+        $className = $this->_rsm->aliasMap[$dqlAlias];
+
+        if (isset($this->_rsm->discriminatorColumns[$dqlAlias])) {
+            $fieldName = $this->_rsm->discriminatorColumns[$dqlAlias];
+
+            if ( ! isset($this->_rsm->metaMappings[$fieldName])) {
+                throw HydrationException::missingDiscriminatorMetaMappingColumn($className, $fieldName, $dqlAlias);
+            }
+
+            $discrColumn = $this->_rsm->metaMappings[$fieldName];
+
+            if ( ! isset($data[$discrColumn])) {
+                throw HydrationException::missingDiscriminatorColumn($className, $discrColumn, $dqlAlias);
+            }
+
+            if ($data[$discrColumn] === "") {
+                throw HydrationException::emptyDiscriminatorValue($dqlAlias);
+            }
+
+            $discrMap = $this->_metadataCache[$className]->discriminatorMap;
+            $discriminatorValue = (string) $data[$discrColumn];
+
+            if ( ! isset($discrMap[$discriminatorValue])) {
+                throw HydrationException::invalidDiscriminatorValue($discriminatorValue, array_keys($discrMap));
+            }
+
+            $className = $discrMap[$discriminatorValue];
+
+            unset($data[$discrColumn]);
+        }
+
+        if (isset($this->_hints[Query::HINT_REFRESH_ENTITY]) && isset($this->rootAliases[$dqlAlias])) {
+            $this->registerManaged($this->_metadataCache[$className], $this->_hints[Query::HINT_REFRESH_ENTITY], $data);
+        }
+
+        $this->_hints['fetchAlias'] = $dqlAlias;
+
+        return $this->_uow->createEntity($className, $data, $this->_hints);
+    }
+
+    /**
+     * @param string $className
+     * @param array  $data
+     *
+     * @return mixed
+     */
+    private function getEntityFromIdentityMap($className, array $data)
+    {
+        // TODO: Abstract this code and UnitOfWork::createEntity() equivalent?
+        $class = $this->_metadataCache[$className];
+
+        /* @var $class ClassMetadata */
+        if ($class->isIdentifierComposite) {
+            $idHash = '';
+
+            foreach ($class->identifier as $fieldName) {
+                $idHash .= ' ' . (isset($class->associationMappings[$fieldName])
+                    ? $data[$class->associationMappings[$fieldName]['joinColumns'][0]['name']]
+                    : $data[$fieldName]);
+            }
+
+            return $this->_uow->tryGetByIdHash(ltrim($idHash), $class->rootEntityName);
+        } else if (isset($class->associationMappings[$class->identifier[0]])) {
+            return $this->_uow->tryGetByIdHash($data[$class->associationMappings[$class->identifier[0]]['joinColumns'][0]['name']], $class->rootEntityName);
+        }
+
+        return $this->_uow->tryGetByIdHash($data[$class->identifier[0]], $class->rootEntityName);
+    }
+
+    /**
+     * Hydrates a single row in an SQL result set.
+     *
+     * @internal
+     * First, the data of the row is split into chunks where each chunk contains data
+     * that belongs to a particular component/class. Afterwards, all these chunks
+     * are processed, one after the other. For each chunk of class data only one of the
+     * following code paths is executed:
+     *
+     * Path A: The data chunk belongs to a joined/associated object and the association
+     *         is collection-valued.
+     * Path B: The data chunk belongs to a joined/associated object and the association
+     *         is single-valued.
+     * Path C: The data chunk belongs to a root result element/object that appears in the topmost
+     *         level of the hydrated result. A typical example are the objects of the type
+     *         specified by the FROM clause in a DQL query.
+     *
+     * @param array $row    The data of the row to process.
+     * @param array $result The result array to fill.
+     *
+     * @return void
+     */
+    protected function hydrateRowData(array $row, array &$result)
+    {
+        // Initialize
+        $id = $this->idTemplate; // initialize the id-memory
+        $nonemptyComponents = [];
+        // Split the row data into chunks of class data.
+        $rowData = $this->gatherRowData($row, $id, $nonemptyComponents);
+
+        // reset result pointers for each data row
+        $this->resultPointers = [];
+
+        // Hydrate the data chunks
+        foreach ($rowData['data'] as $dqlAlias => $data) {
+            $entityName = $this->_rsm->aliasMap[$dqlAlias];
+
+            if (isset($this->_rsm->parentAliasMap[$dqlAlias])) {
+                // It's a joined result
+
+                $parentAlias = $this->_rsm->parentAliasMap[$dqlAlias];
+                // we need the $path to save into the identifier map which entities were already
+                // seen for this parent-child relationship
+                $path = $parentAlias . '.' . $dqlAlias;
+
+                // We have a RIGHT JOIN result here. Doctrine cannot hydrate RIGHT JOIN Object-Graphs
+                if ( ! isset($nonemptyComponents[$parentAlias])) {
+                    // TODO: Add special case code where we hydrate the right join objects into identity map at least
+                    continue;
+                }
+
+                $parentClass    = $this->_metadataCache[$this->_rsm->aliasMap[$parentAlias]];
+                $relationField  = $this->_rsm->relationMap[$dqlAlias];
+                $relation       = $parentClass->associationMappings[$relationField];
+                $reflField      = $parentClass->reflFields[$relationField];
+
+                // Get a reference to the parent object to which the joined element belongs.
+                if ($this->_rsm->isMixed && isset($this->rootAliases[$parentAlias])) {
+                    $objectClass = $this->resultPointers[$parentAlias];
+                    $parentObject = $objectClass[key($objectClass)];
+                } else if (isset($this->resultPointers[$parentAlias])) {
+                    $parentObject = $this->resultPointers[$parentAlias];
+                } else {
+                    // Parent object of relation not found, mark as not-fetched again
+                    $element = $this->getEntity($data, $dqlAlias);
+
+                    // Update result pointer and provide initial fetch data for parent
+                    $this->resultPointers[$dqlAlias] = $element;
+                    $rowData['data'][$parentAlias][$relationField] = $element;
+
+                    // Mark as not-fetched again
+                    unset($this->_hints['fetched'][$parentAlias][$relationField]);
+                    continue;
+                }
+
+                $oid = spl_object_hash($parentObject);
+
+                // Check the type of the relation (many or single-valued)
+                if ( ! ($relation['type'] & ClassMetadata::TO_ONE)) {
+                    // PATH A: Collection-valued association
+                    $reflFieldValue = $reflField->getValue($parentObject);
+
+                    if (isset($nonemptyComponents[$dqlAlias])) {
+                        $collKey = $oid . $relationField;
+                        if (isset($this->initializedCollections[$collKey])) {
+                            $reflFieldValue = $this->initializedCollections[$collKey];
+                        } else if ( ! isset($this->existingCollections[$collKey])) {
+                            $reflFieldValue = $this->initRelatedCollection($parentObject, $parentClass, $relationField, $parentAlias);
+                        }
+
+                        $indexExists    = isset($this->identifierMap[$path][$id[$parentAlias]][$id[$dqlAlias]]);
+                        $index          = $indexExists ? $this->identifierMap[$path][$id[$parentAlias]][$id[$dqlAlias]] : false;
+                        $indexIsValid   = $index !== false ? isset($reflFieldValue[$index]) : false;
+
+                        if ( ! $indexExists || ! $indexIsValid) {
+                            if (isset($this->existingCollections[$collKey])) {
+                                // Collection exists, only look for the element in the identity map.
+                                if ($element = $this->getEntityFromIdentityMap($entityName, $data)) {
+                                    $this->resultPointers[$dqlAlias] = $element;
+                                } else {
+                                    unset($this->resultPointers[$dqlAlias]);
+                                }
+                            } else {
+                                $element = $this->getEntity($data, $dqlAlias);
+
+                                if (isset($this->_rsm->indexByMap[$dqlAlias])) {
+                                    $indexValue = $row[$this->_rsm->indexByMap[$dqlAlias]];
+                                    $reflFieldValue->hydrateSet($indexValue, $element);
+                                    $this->identifierMap[$path][$id[$parentAlias]][$id[$dqlAlias]] = $indexValue;
+                                } else {
+                                    $reflFieldValue->hydrateAdd($element);
+                                    $reflFieldValue->last();
+                                    $this->identifierMap[$path][$id[$parentAlias]][$id[$dqlAlias]] = $reflFieldValue->key();
+                                }
+                                // Update result pointer
+                                $this->resultPointers[$dqlAlias] = $element;
+                            }
+                        } else {
+                            // Update result pointer
+                            $this->resultPointers[$dqlAlias] = $reflFieldValue[$index];
+                        }
+                    } else if ( ! $reflFieldValue) {
+                        $this->initRelatedCollection($parentObject, $parentClass, $relationField, $parentAlias);
+                    } else if ($reflFieldValue instanceof PersistentCollection && $reflFieldValue->isInitialized() === false) {
+                        $reflFieldValue->setInitialized(true);
+                    }
+
+                } else {
+                    // PATH B: Single-valued association
+                    $reflFieldValue = $reflField->getValue($parentObject);
+
+                    if ( ! $reflFieldValue || isset($this->_hints[Query::HINT_REFRESH]) || ($reflFieldValue instanceof Proxy && !$reflFieldValue->__isInitialized__)) {
+                        // we only need to take action if this value is null,
+                        // we refresh the entity or its an uninitialized proxy.
+                        if (isset($nonemptyComponents[$dqlAlias])) {
+                            $element = $this->getEntity($data, $dqlAlias);
+                            $reflField->setValue($parentObject, $element);
+                            $this->_uow->setOriginalEntityProperty($oid, $relationField, $element);
+                            $targetClass = $this->_metadataCache[$relation['targetEntity']];
+
+                            if ($relation['isOwningSide']) {
+                                // TODO: Just check hints['fetched'] here?
+                                // If there is an inverse mapping on the target class its bidirectional
+                                if ($relation['inversedBy']) {
+                                    $inverseAssoc = $targetClass->associationMappings[$relation['inversedBy']];
+                                    if ($inverseAssoc['type'] & ClassMetadata::TO_ONE) {
+                                        $targetClass->reflFields[$inverseAssoc['fieldName']]->setValue($element, $parentObject);
+                                        $this->_uow->setOriginalEntityProperty(spl_object_hash($element), $inverseAssoc['fieldName'], $parentObject);
+                                    }
+                                } else if ($parentClass === $targetClass && $relation['mappedBy']) {
+                                    // Special case: bi-directional self-referencing one-one on the same class
+                                    $targetClass->reflFields[$relationField]->setValue($element, $parentObject);
+                                }
+                            } else {
+                                // For sure bidirectional, as there is no inverse side in unidirectional mappings
+                                $targetClass->reflFields[$relation['mappedBy']]->setValue($element, $parentObject);
+                                $this->_uow->setOriginalEntityProperty(spl_object_hash($element), $relation['mappedBy'], $parentObject);
+                            }
+                            // Update result pointer
+                            $this->resultPointers[$dqlAlias] = $element;
+                        } else {
+                            $this->_uow->setOriginalEntityProperty($oid, $relationField, null);
+                            $reflField->setValue($parentObject, null);
+                        }
+                        // else leave $reflFieldValue null for single-valued associations
+                    } else {
+                        // Update result pointer
+                        $this->resultPointers[$dqlAlias] = $reflFieldValue;
+                    }
+                }
+            } else {
+                // PATH C: Its a root result element
+                $this->rootAliases[$dqlAlias] = true; // Mark as root alias
+                $entityKey = $this->_rsm->entityMappings[$dqlAlias] ?: 0;
+
+                // if this row has a NULL value for the root result id then make it a null result.
+                if ( ! isset($nonemptyComponents[$dqlAlias]) ) {
+                    if ($this->_rsm->isMixed) {
+                        $result[] = [$entityKey => null];
+                    } else {
+                        $result[] = null;
+                    }
+                    $resultKey = $this->resultCounter;
+                    ++$this->resultCounter;
+                    continue;
+                }
+
+                // check for existing result from the iterations before
+                if ( ! isset($this->identifierMap[$dqlAlias][$id[$dqlAlias]])) {
+                    $element = $this->getEntity($data, $dqlAlias);
+
+                    if ($this->_rsm->isMixed) {
+                        $element = [$entityKey => $element];
+                    }
+
+                    if (isset($this->_rsm->indexByMap[$dqlAlias])) {
+                        $resultKey = $row[$this->_rsm->indexByMap[$dqlAlias]];
+
+                        if (isset($this->_hints['collection'])) {
+                            $this->_hints['collection']->hydrateSet($resultKey, $element);
+                        }
+
+                        $result[$resultKey] = $element;
+                    } else {
+                        $resultKey = $this->resultCounter;
+                        ++$this->resultCounter;
+
+                        if (isset($this->_hints['collection'])) {
+                            $this->_hints['collection']->hydrateAdd($element);
+                        }
+
+                        $result[] = $element;
+                    }
+
+                    $this->identifierMap[$dqlAlias][$id[$dqlAlias]] = $resultKey;
+
+                    // Update result pointer
+                    $this->resultPointers[$dqlAlias] = $element;
+
+                } else {
+                    // Update result pointer
+                    $index = $this->identifierMap[$dqlAlias][$id[$dqlAlias]];
+                    $this->resultPointers[$dqlAlias] = $result[$index];
+                    $resultKey = $index;
+                }
+            }
+
+            if (isset($this->_hints[Query::HINT_INTERNAL_ITERATION]) && $this->_hints[Query::HINT_INTERNAL_ITERATION]) {
+                $this->_uow->hydrationComplete();
+            }
+        }
+
+        if ( ! isset($resultKey) ) {
+            $this->resultCounter++;
+        }
+
+        // Append scalar values to mixed result sets
+        if (isset($rowData['scalars'])) {
+            if ( ! isset($resultKey) ) {
+                $resultKey = (isset($this->_rsm->indexByMap['scalars']))
+                    ? $row[$this->_rsm->indexByMap['scalars']]
+                    : $this->resultCounter - 1;
+            }
+
+            foreach ($rowData['scalars'] as $name => $value) {
+                $result[$resultKey][$name] = $value;
+            }
+        }
+
+        // Append new object to mixed result sets
+        if (isset($rowData['newObjects'])) {
+            if ( ! isset($resultKey) ) {
+                $resultKey = $this->resultCounter - 1;
+            }
+
+
+            $scalarCount = (isset($rowData['scalars'])? count($rowData['scalars']): 0);
+
+            foreach ($rowData['newObjects'] as $objIndex => $newObject) {
+                $class  = $newObject['class'];
+                $args   = $newObject['args'];
+                $obj    = $class->newInstanceArgs($args);
+
+                if ($scalarCount == 0 && count($rowData['newObjects']) == 1 ) {
+                    $result[$resultKey] = $obj;
+
+                    continue;
+                }
+
+                $result[$resultKey][$objIndex] = $obj;
+            }
+        }
+    }
+
+    /**
+     * When executed in a hydrate() loop we may have to clear internal state to
+     * decrease memory consumption.
+     *
+     * @param mixed $eventArgs
+     *
+     * @return void
+     */
+    public function onClear($eventArgs)
+    {
+        parent::onClear($eventArgs);
+
+        $aliases             = array_keys($this->identifierMap);
+
+        $this->identifierMap = array_fill_keys($aliases, []);
+    }
+}

vendor/doctrine/orm/lib/Doctrine/ORM/Internal/Hydration/ScalarHydrator.php

@@ -0,0 +1,54 @@
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\ORM\Internal\Hydration;
+
+/**
+ * Hydrator that produces flat, rectangular results of scalar data.
+ * The created result is almost the same as a regular SQL result set, except
+ * that column names are mapped to field names and data type conversions take place.
+ *
+ * @since  2.0
+ * @author Roman Borschel <roman@code-factory.org>
+ * @author Guilherme Blanco <guilhermeblanco@hotmail.com>
+ */
+class ScalarHydrator extends AbstractHydrator
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function hydrateAllData()
+    {
+        $result = [];
+
+        while ($data = $this->_stmt->fetch(\PDO::FETCH_ASSOC)) {
+            $this->hydrateRowData($data, $result);
+        }
+
+        return $result;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function hydrateRowData(array $row, array &$result)
+    {
+        $result[] = $this->gatherScalarRowData($row);
+    }
+}

vendor/doctrine/orm/lib/Doctrine/ORM/Internal/Hydration/SimpleObjectHydrator.php

@@ -0,0 +1,163 @@
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\ORM\Internal\Hydration;
+
+use PDO;
+use Doctrine\ORM\Mapping\ClassMetadata;
+use Doctrine\ORM\Query;
+use function array_keys;
+use function in_array;
+
+class SimpleObjectHydrator extends AbstractHydrator
+{
+    /**
+     * @var ClassMetadata
+     */
+    private $class;
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function prepare()
+    {
+        if (count($this->_rsm->aliasMap) !== 1) {
+            throw new \RuntimeException("Cannot use SimpleObjectHydrator with a ResultSetMapping that contains more than one object result.");
+        }
+
+        if ($this->_rsm->scalarMappings) {
+            throw new \RuntimeException("Cannot use SimpleObjectHydrator with a ResultSetMapping that contains scalar mappings.");
+        }
+
+        $this->class = $this->getClassMetadata(reset($this->_rsm->aliasMap));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function cleanup()
+    {
+        parent::cleanup();
+
+        $this->_uow->triggerEagerLoads();
+        $this->_uow->hydrationComplete();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function hydrateAllData()
+    {
+        $result = [];
+
+        while ($row = $this->_stmt->fetch(PDO::FETCH_ASSOC)) {
+            $this->hydrateRowData($row, $result);
+        }
+
+        $this->_em->getUnitOfWork()->triggerEagerLoads();
+
+        return $result;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function hydrateRowData(array $row, array &$result)
+    {
+        $entityName       = $this->class->name;
+        $data             = [];
+        $discrColumnValue = null;
+
+        // We need to find the correct entity class name if we have inheritance in resultset
+        if ($this->class->inheritanceType !== ClassMetadata::INHERITANCE_TYPE_NONE) {
+            $discrColumnName = $this->_platform->getSQLResultCasing($this->class->discriminatorColumn['name']);
+
+            // Find mapped discriminator column from the result set.
+            if ($metaMappingDiscrColumnName = array_search($discrColumnName, $this->_rsm->metaMappings)) {
+                $discrColumnName = $metaMappingDiscrColumnName;
+            }
+
+            if (! isset($row[$discrColumnName])) {
+                throw HydrationException::missingDiscriminatorColumn($entityName, $discrColumnName, key($this->_rsm->aliasMap));
+            }
+
+            if ($row[$discrColumnName] === '') {
+                throw HydrationException::emptyDiscriminatorValue(key($this->_rsm->aliasMap));
+            }
+
+            $discrMap = $this->class->discriminatorMap;
+
+            if (! isset($discrMap[$row[$discrColumnName]])) {
+                throw HydrationException::invalidDiscriminatorValue($row[$discrColumnName], array_keys($discrMap));
+            }
+
+            $entityName       = $discrMap[$row[$discrColumnName]];
+            $discrColumnValue = $row[$discrColumnName];
+
+            unset($row[$discrColumnName]);
+        }
+
+        foreach ($row as $column => $value) {
+            // An ObjectHydrator should be used instead of SimpleObjectHydrator
+            if (isset($this->_rsm->relationMap[$column])) {
+                throw new \Exception(sprintf('Unable to retrieve association information for column "%s"', $column));
+            }
+
+            $cacheKeyInfo = $this->hydrateColumnInfo($column);
+
+            if ( ! $cacheKeyInfo) {
+                continue;
+            }
+
+            // Check if value is null before conversion (because some types convert null to something else)
+            $valueIsNull = null === $value;
+
+            // Convert field to a valid PHP value
+            if (isset($cacheKeyInfo['type'])) {
+                $type  = $cacheKeyInfo['type'];
+                $value = $type->convertToPHPValue($value, $this->_platform);
+            }
+
+            $fieldName = $cacheKeyInfo['fieldName'];
+
+            // Prevent overwrite in case of inherit classes using same property name (See AbstractHydrator)
+            if ( ! isset($data[$fieldName]) || ! $valueIsNull) {
+                // If we have inheritance in resultset, make sure the field belongs to the correct class
+                if (isset($cacheKeyInfo['discriminatorValues']) && ! in_array((string) $discrColumnValue, $cacheKeyInfo['discriminatorValues'], true)) {
+                    continue;
+                }
+
+                $data[$fieldName] = $value;
+            }
+        }
+
+        if (isset($this->_hints[Query::HINT_REFRESH_ENTITY])) {
+            $this->registerManaged($this->class, $this->_hints[Query::HINT_REFRESH_ENTITY], $data);
+        }
+
+        $uow    = $this->_em->getUnitOfWork();
+        $entity = $uow->createEntity($entityName, $data, $this->_hints);
+
+        $result[] = $entity;
+
+        if (isset($this->_hints[Query::HINT_INTERNAL_ITERATION]) && $this->_hints[Query::HINT_INTERNAL_ITERATION]) {
+            $this->_uow->hydrationComplete();
+        }
+    }
+}

vendor/doctrine/orm/lib/Doctrine/ORM/Internal/Hydration/SingleScalarHydrator.php

@@ -0,0 +1,58 @@
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\ORM\Internal\Hydration;
+
+use Doctrine\ORM\NoResultException;
+use Doctrine\ORM\NonUniqueResultException;
+
+/**
+ * Hydrator that hydrates a single scalar value from the result set.
+ *
+ * @since  2.0
+ * @author Roman Borschel <roman@code-factory.org>
+ * @author Guilherme Blanco <guilhermeblanco@hotmail.com>
+ */
+class SingleScalarHydrator extends AbstractHydrator
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function hydrateAllData()
+    {
+        $data    = $this->_stmt->fetchAll(\PDO::FETCH_ASSOC);
+        $numRows = count($data);
+
+        if ($numRows === 0) {
+            throw new NoResultException();
+        }
+
+        if ($numRows > 1) {
+            throw new NonUniqueResultException('The query returned multiple rows. Change the query or use a different result function like getScalarResult().');
+        }
+        
+        if (count($data[key($data)]) > 1) {
+            throw new NonUniqueResultException('The query returned a row containing multiple columns. Change the query or use a different result function like getScalarResult().');
+        }
+
+        $result = $this->gatherScalarRowData($data[key($data)]);
+
+        return array_shift($result);
+    }
+}

vendor/doctrine/orm/lib/Doctrine/ORM/Internal/HydrationCompleteHandler.php

@@ -0,0 +1,103 @@
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\ORM\Internal;
+
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\Event\LifecycleEventArgs;
+use Doctrine\ORM\Event\ListenersInvoker;
+use Doctrine\ORM\Events;
+use Doctrine\ORM\Mapping\ClassMetadata;
+
+/**
+ * Class, which can handle completion of hydration cycle and produce some of tasks.
+ * In current implementation triggers deferred postLoad event.
+ *
+ * @author Artur Eshenbrener <strate@yandex.ru>
+ * @since 2.5
+ */
+final class HydrationCompleteHandler
+{
+    /**
+     * @var ListenersInvoker
+     */
+    private $listenersInvoker;
+
+    /**
+     * @var EntityManagerInterface
+     */
+    private $em;
+
+    /**
+     * @var array[]
+     */
+    private $deferredPostLoadInvocations = [];
+
+    /**
+     * Constructor for this object
+     *
+     * @param ListenersInvoker $listenersInvoker
+     * @param EntityManagerInterface $em
+     */
+    public function __construct(ListenersInvoker $listenersInvoker, EntityManagerInterface $em)
+    {
+        $this->listenersInvoker = $listenersInvoker;
+        $this->em               = $em;
+    }
+
+    /**
+     * Method schedules invoking of postLoad entity to the very end of current hydration cycle.
+     *
+     * @param ClassMetadata $class
+     * @param object        $entity
+     */
+    public function deferPostLoadInvoking(ClassMetadata $class, $entity)
+    {
+        $invoke = $this->listenersInvoker->getSubscribedSystems($class, Events::postLoad);
+
+        if ($invoke === ListenersInvoker::INVOKE_NONE) {
+            return;
+        }
+
+        $this->deferredPostLoadInvocations[] = [$class, $invoke, $entity];
+    }
+
+    /**
+     * This method should me called after any hydration cycle completed.
+     *
+     * Method fires all deferred invocations of postLoad events
+     */
+    public function hydrationComplete()
+    {
+        $toInvoke                          = $this->deferredPostLoadInvocations;
+        $this->deferredPostLoadInvocations = [];
+
+        foreach ($toInvoke as $classAndEntity) {
+            [$class, $invoke, $entity] = $classAndEntity;
+
+            $this->listenersInvoker->invoke(
+                $class,
+                Events::postLoad,
+                $entity,
+                new LifecycleEventArgs($entity, $this->em),
+                $invoke
+            );
+        }
+    }
+}