114 lines
2.8 KiB
PHP
114 lines
2.8 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Doctrine\ORM;
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use Doctrine\Common\Collections\AbstractLazyCollection;
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use Doctrine\Common\Collections\ArrayCollection;
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use Doctrine\Common\Collections\Criteria;
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use Doctrine\Common\Collections\Selectable;
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use Doctrine\ORM\Persisters\Entity\EntityPersister;
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use ReturnTypeWillChange;
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use function assert;
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/**
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* A lazy collection that allows a fast count when using criteria object
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* Once count gets executed once without collection being initialized, result
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* is cached and returned on subsequent calls until collection gets loaded,
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* then returning the number of loaded results.
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*
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* @template TKey of array-key
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* @template TValue of object
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* @extends AbstractLazyCollection<TKey, TValue>
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* @implements Selectable<TKey, TValue>
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*/
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class LazyCriteriaCollection extends AbstractLazyCollection implements Selectable
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{
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/** @var EntityPersister */
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protected $entityPersister;
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/** @var Criteria */
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protected $criteria;
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/** @var int|null */
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private $count;
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public function __construct(EntityPersister $entityPersister, Criteria $criteria)
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{
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$this->entityPersister = $entityPersister;
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$this->criteria = $criteria;
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}
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/**
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* Do an efficient count on the collection
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*
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* @return int
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*/
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#[ReturnTypeWillChange]
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public function count()
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{
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if ($this->isInitialized()) {
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return $this->collection->count();
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}
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// Return cached result in case count query was already executed
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if ($this->count !== null) {
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return $this->count;
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}
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return $this->count = $this->entityPersister->count($this->criteria);
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}
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/**
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* check if collection is empty without loading it
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*
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* @return bool TRUE if the collection is empty, FALSE otherwise.
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*/
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public function isEmpty()
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{
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if ($this->isInitialized()) {
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return $this->collection->isEmpty();
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}
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return ! $this->count();
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}
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/**
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* {@inheritDoc}
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*
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* Do an optimized search of an element
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*
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* @template TMaybeContained
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*/
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public function contains($element)
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{
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if ($this->isInitialized()) {
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return $this->collection->contains($element);
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}
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return $this->entityPersister->exists($element, $this->criteria);
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}
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/**
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* {@inheritDoc}
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*/
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public function matching(Criteria $criteria)
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{
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$this->initialize();
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assert($this->collection instanceof Selectable);
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return $this->collection->matching($criteria);
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}
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/**
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* {@inheritDoc}
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*/
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protected function doInitialize()
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{
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$elements = $this->entityPersister->loadCriteria($this->criteria);
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$this->collection = new ArrayCollection($elements);
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}
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}
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