ObjectHydrator::__construct() - Code Metrics - Inspection of "[WIP] #6638 #6648 one-to-one association being ref..." - doctrine/orm - Measure and Improve Code Quality continuously with Scrutinizer

Test Failed
Pull Request — master (#6649)

by Marco
created 2017-08-25 21:52 UTC
ObjectHydrator::__construct() A

↳ Parent: ObjectHydrator
Complexity

Conditions	1
Paths	1
Size

Total Lines	6
Code Lines	3
Duplication

Lines	0
Ratio	0 %
Code Coverage

Tests	2
CRAP Score	1
Importance

Changes
Metric	Value
dl	0
loc	6
ccs	2
cts	2
cp	1
rs	9.4285
c	0
b	0
f	0
cc	1
eloc	3
nc	1
nop	1
crap	1
<?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\EntityManagerInterface;
use Doctrine\ORM\Internal\Hydration\Cache\LazyPropertyMap;
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 <[email protected]>
 * @author Guilherme Blanco <[email protected]>
 * @author Fabio B. Silva <[email protected]>
 */
class ObjectHydrator extends AbstractHydrator
{
    /**
     * @var array
     */
    private $identifierMap = [];

    /**
     * @var object[] indexed by oid
     */
    private $createdEntities = [];

    /**
     * @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 = [];

    /**
     * @var LazyPropertyMap|callable[]
     */
    private $entityTryGetCallbacksByEntityName;

    public function __construct(EntityManagerInterface $em)
    {
        parent::__construct($em);

        $this->entityTryGetCallbacksByEntityName = new LazyPropertyMap([$this, 'buildEntityTryGet']);
    }

    /**
     * {@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);
            }

            /* @var $sourceClass ClassMetadata */
            $sourceClass = $this->_metadataCache->{$this->_rsm->aliasMap[$parent]};
            $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']) {
                /* @var $class ClassMetadata */
                $class        = $this->_metadataCache->{$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);
            }

            /* @var $class ClassMetadata */
            $class    = $this->_metadataCache->{$className};
            $discrMap = $class->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;

        $managedEntity = ($this->entityTryGetCallbacksByEntityName->{$className})($data);

        // If the entity is not existing in the UnitOfWork, then we
        // are the one creating it: let's track the object hash to
        // allow writing to it. Note that we discard `$managedEntity`
        // anyway, as we need to call `createEntity` with the data
        // in any case to allow refreshing proxy information, for
        // example
        if (! $managedEntity) {
            $entity = $this->_uow->createEntity($className, $data, $this->_hints);

            $this->createdEntities[\spl_object_hash($entity)] = true;

            return $entity;
        }

        $entity = $this->_uow->createEntity($className, $data, $this->_hints);

        // If the entity is not created by us, we can only consider
        // it to be created in here if it's a non-initialized proxy
        if ($entity instanceof Proxy && ! $entity->__isInitialized()) {
            $this->createdEntities[\spl_object_hash($entity)] = true;
        }

        return $entity;
    }

    /**
     * @internal do not use this or you shall be punished with the wrath of the debugger
     * @private
     *
     * @param string $className
     *
     * @return callable
     */
    public function buildEntityTryGet(string $className) : callable
    {
        /* @var $metadata ClassMetadata */
        $metadata       = $this->_metadataCache->{$className};
        $rootEntityName = $metadata->rootEntityName;
        /* @var $idColumns string[] */
        $idColumns      = [];

        foreach ($metadata->identifier as $idFieldName) {
            $idColumns[] = isset($metadata->associationMappings[$idFieldName])
                ? $metadata->associationMappings[$idFieldName]['joinColumns'][0]['name']
                : $idFieldName;
        }

        /**
         * @return object|Proxy|null
         */
        return function (array $data) use ($idColumns, $rootEntityName) {
            $idHashData = [];

            foreach ($idColumns as $idColumn) {
                if (! isset($data[$idColumn])) {
                    return null;
                }

                $idHashData[] = $data[$idColumn];
            }

            return $this->_uow->tryGetByIdHash(\implode(' ', $idHashData), $rootEntityName) ?: null;
        };
    }

    /**
     * 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 = ($this->entityTryGetCallbacksByEntityName->{$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) {
                        $reflFieldValue = $this->initRelatedCollection($parentObject, $parentClass, $relationField, $parentAlias);
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}
                    } else if ($reflFieldValue instanceof PersistentCollection && $reflFieldValue->isInitialized() === false) {
                        $reflFieldValue->setInitialized(true);
                    }

                } else {
                    // PATH B: Single-valued association
                    $reflFieldValue = $reflField->getValue($parentObject);

                    if (isset($this->createdEntities[$oid]) || isset($this->_hints[Query::HINT_REFRESH])) {
                        // we only need to take action if `$parentObject` was not built or is not to be refreshed by this hydrator,
                        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, []);
    }
}

doctrine / orm

Pull Request — master (#6649)

ObjectHydrator::__construct() A

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