119 lines
3.5 KiB
PHP
119 lines
3.5 KiB
PHP
<?php
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/*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the MIT license. For more information, see
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* <http://www.doctrine-project.org>.
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*/
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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\BasicEntityPersister;
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use Doctrine\ORM\Persisters\Entity\EntityPersister;
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/**
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* A lazy collection that allow 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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* @since 2.5
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* @author Guilherme Blanco <guilhermeblanco@hotmail.com>
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* @author Michaël Gallego <mic.gallego@gmail.com>
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*/
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class LazyCriteriaCollection extends AbstractLazyCollection implements Selectable
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{
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/**
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* @var BasicEntityPersister
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*/
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protected $entityPersister;
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/**
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* @var Criteria
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*/
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protected $criteria;
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/**
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* @var integer|null
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*/
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private $count;
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/**
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* @param EntityPersister $entityPersister
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* @param Criteria $criteria
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*/
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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 = $criteria;
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}
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/**
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* Do an efficient count on the collection
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*
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* @return integer
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*/
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public function count()
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{
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if ($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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* Do an optimized search of an element
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*
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* @param object $element
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* @return bool
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*/
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public function contains($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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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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