677 lines
17 KiB
PHP
677 lines
17 KiB
PHP
<?php
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/*
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* $Id$
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.doctrine-project.org>.
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*/
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namespace Doctrine\ORM;
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use Doctrine\ORM\Mapping\AssociationMapping,
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\Closure;
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/**
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* A PersistentCollection represents a collection of elements that have persistent state.
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*
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* Collections of entities represent only the associations (links) to those entities.
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* That means, if the collection is part of a many-many mapping and you remove
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* entities from the collection, only the links in the relation table are removed (on flush).
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* Similarly, if you remove entities from a collection that is part of a one-many
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* mapping this will only result in the nulling out of the foreign keys on flush.
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*
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @since 2.0
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* @version $Revision: 4930 $
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* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
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* @author Roman Borschel <roman@code-factory.org>
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* @author Giorgio Sironi <piccoloprincipeazzurro@gmail.com>
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*/
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final class PersistentCollection implements \Doctrine\Common\Collections\Collection
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{
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/**
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* A snapshot of the collection at the moment it was fetched from the database.
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* This is used to create a diff of the collection at commit time.
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*
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* @var array
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*/
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private $_snapshot = array();
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/**
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* The entity that owns this collection.
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*
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* @var object
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*/
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private $_owner;
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/**
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* The association mapping the collection belongs to.
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* This is currently either a OneToManyMapping or a ManyToManyMapping.
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*
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* @var Doctrine\ORM\Mapping\AssociationMapping
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*/
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private $_association;
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/**
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* The EntityManager that manages the persistence of the collection.
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*
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* @var Doctrine\ORM\EntityManager
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*/
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private $_em;
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/**
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* The name of the field on the target entities that points to the owner
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* of the collection. This is only set if the association is bi-directional.
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*
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* @var string
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*/
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private $_backRefFieldName;
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/**
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* The class descriptor of the collection's entity type.
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*/
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private $_typeClass;
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/**
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* Whether the collection is dirty and needs to be synchronized with the database
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* when the UnitOfWork that manages its persistent state commits.
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*
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* @var boolean
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*/
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private $_isDirty = false;
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/**
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* Whether the collection has already been initialized.
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*
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* @var boolean
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*/
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private $_initialized = true;
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/**
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* The wrapped Collection instance.
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*
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* @var Collection
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*/
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private $_coll;
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/**
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* Creates a new persistent collection.
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*
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* @param EntityManager $em The EntityManager the collection will be associated with.
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* @param ClassMetadata $class The class descriptor of the entity type of this collection.
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* @param array The collection elements.
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*/
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public function __construct(EntityManager $em, $class, $coll)
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{
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$this->_coll = $coll;
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$this->_em = $em;
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$this->_typeClass = $class;
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}
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/**
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* INTERNAL:
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* Sets the collection's owning entity together with the AssociationMapping that
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* describes the association between the owner and the elements of the collection.
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*
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* @param object $entity
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* @param AssociationMapping $assoc
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*/
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public function setOwner($entity, AssociationMapping $assoc)
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{
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$this->_owner = $entity;
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$this->_association = $assoc;
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// Check for bidirectionality
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if ( ! $assoc->isOwningSide) {
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// For sure bi-directional
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$this->_backRefFieldName = $assoc->mappedByFieldName;
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} else {
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if (isset($this->_typeClass->inverseMappings[$assoc->sourceEntityName][$assoc->sourceFieldName])) {
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// Bi-directional
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$this->_backRefFieldName = $this->_typeClass->inverseMappings[$assoc->sourceEntityName][$assoc->sourceFieldName]->sourceFieldName;
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}
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}
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}
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/**
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* INTERNAL:
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* Gets the collection owner.
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*
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* @return object
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*/
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public function getOwner()
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{
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return $this->_owner;
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}
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public function getTypeClass()
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{
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return $this->_typeClass;
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}
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/**
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* INTERNAL:
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* Adds an element to a collection during hydration. This will automatically
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* complete bidirectional associations.
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*
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* @param mixed $element The element to add.
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*/
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public function hydrateAdd($element)
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{
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$this->_coll->add($element);
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// If _backRefFieldName is set, then the association is bidirectional
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// and we need to set the back reference.
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if ($this->_backRefFieldName) {
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// Set back reference to owner
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if ($this->_association->isOneToMany()) {
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// OneToMany
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$this->_typeClass->reflFields[$this->_backRefFieldName]
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->setValue($element, $this->_owner);
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$this->_em->getUnitOfWork()->setOriginalEntityProperty(
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spl_object_hash($element),
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$this->_backRefFieldName,
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$this->_owner);
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} else {
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// ManyToMany
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$this->_typeClass->reflFields[$this->_backRefFieldName]
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->getValue($element)->unwrap()->add($this->_owner);
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}
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}
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}
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/**
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* INTERNAL:
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* Sets a keyed element in the collection during hydration.
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*
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* @param mixed $key The key to set.
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* $param mixed $value The element to set.
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*/
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public function hydrateSet($key, $element)
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{
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$this->_coll->set($key, $element);
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// If _backRefFieldName is set, then the association is bidirectional
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// and we need to set the back reference.
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if ($this->_backRefFieldName) {
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// Set back reference to owner
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if ($this->_association->isOneToMany()) {
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// OneToMany
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$this->_typeClass->reflFields[$this->_backRefFieldName]
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->setValue($element, $this->_owner);
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} else {
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// ManyToMany
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$this->_typeClass->reflFields[$this->_backRefFieldName]
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->getValue($element)->set($key, $this->_owner);
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}
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}
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}
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/**
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* Initializes the collection by loading its contents from the database
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* if the collection is not yet initialized.
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*/
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private function _initialize()
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{
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if ( ! $this->_initialized) {
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if ($this->_isDirty) {
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// Has NEW objects added through add(). Remember them.
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$newObjects = $this->_coll->toArray();
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}
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$this->_coll->clear();
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$this->_association->load($this->_owner, $this, $this->_em);
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$this->takeSnapshot();
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// Reattach NEW objects added through add(), if any.
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if (isset($newObjects)) {
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foreach ($newObjects as $obj) {
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$this->_coll->add($obj);
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}
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$this->_isDirty = true;
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}
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$this->_initialized = true;
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}
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}
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/**
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* INTERNAL:
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* Tells this collection to take a snapshot of its current state.
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*/
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public function takeSnapshot()
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{
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$this->_snapshot = $this->_coll->toArray();
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$this->_isDirty = false;
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}
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/**
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* INTERNAL:
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* Returns the last snapshot of the elements in the collection.
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*
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* @return array The last snapshot of the elements.
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*/
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public function getSnapshot()
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{
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return $this->_snapshot;
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}
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/**
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* INTERNAL:
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* getDeleteDiff
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*
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* @return array
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*/
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public function getDeleteDiff()
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{
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return array_udiff_assoc($this->_snapshot, $this->_coll->toArray(),
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function($a, $b) {return $a === $b ? 0 : 1;});
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}
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/**
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* INTERNAL:
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* getInsertDiff
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*
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* @return array
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*/
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public function getInsertDiff()
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{
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return array_udiff_assoc($this->_coll->toArray(), $this->_snapshot,
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function($a, $b) {return $a === $b ? 0 : 1;});
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}
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/**
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* INTERNAL: Gets the association mapping of the collection.
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*
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* @return Doctrine\ORM\Mapping\AssociationMapping
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*/
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public function getMapping()
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{
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return $this->_association;
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}
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/**
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* Marks this collection as changed/dirty.
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*/
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private function _changed()
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{
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$this->_isDirty = true;
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}
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/**
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* Gets a boolean flag indicating whether this colleciton is dirty which means
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* its state needs to be synchronized with the database.
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*
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* @return boolean TRUE if the collection is dirty, FALSE otherwise.
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*/
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public function isDirty()
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{
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return $this->_isDirty;
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}
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/**
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* Sets a boolean flag, indicating whether this collection is dirty.
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*
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* @param boolean $dirty Whether the collection should be marked dirty or not.
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*/
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public function setDirty($dirty)
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{
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$this->_isDirty = $dirty;
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}
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/**
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* Sets the initialized flag of the collection, forcing it into that state.
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*
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* @param boolean $bool
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*/
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public function setInitialized($bool)
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{
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$this->_initialized = $bool;
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}
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/**
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* Checks whether this collection has been initialized.
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*
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* @return boolean
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*/
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public function isInitialized()
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{
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return $this->_initialized;
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}
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/** {@inheritdoc} */
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public function first()
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{
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$this->_initialize();
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return $this->_coll->first();
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}
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/** {@inheritdoc} */
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public function last()
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{
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$this->_initialize();
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return $this->_coll->last();
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}
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/**
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* {@inheritdoc}
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*/
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public function remove($key)
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{
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// TODO: If the keys are persistent as well (not yet implemented)
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// and the collection is not initialized and orphanRemoval is
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// not used we can issue a straight SQL delete/update on the
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// association (table). Without initializing the collection.
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$this->_initialize();
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$removed = $this->_coll->remove($key);
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if ($removed) {
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$this->_changed();
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if ($this->_association !== null && $this->_association->isOneToMany() &&
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$this->_association->orphanRemoval) {
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$this->_em->getUnitOfWork()->scheduleOrphanRemoval($removed);
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}
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}
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return $removed;
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}
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/**
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* {@inheritdoc}
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*/
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public function removeElement($element)
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{
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// TODO: Assuming the identity of entities in a collection is always based
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// on their primary key (there is no equals/hashCode in PHP),
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// if the collection is not initialized, we could issue a straight
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// SQL DELETE/UPDATE on the association (table) without initializing
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// the collection.
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/*if ( ! $this->_initialized) {
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$this->_em->getUnitOfWork()->getCollectionPersister($this->_association)
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->deleteRows($this, $element);
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}*/
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$this->_initialize();
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$result = $this->_coll->removeElement($element);
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$this->_changed();
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return $result;
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}
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/**
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* {@inheritdoc}
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*/
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public function containsKey($key)
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{
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$this->_initialize();
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return $this->_coll->containsKey($key);
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}
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/**
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* {@inheritdoc}
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*/
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public function contains($element)
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{
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/* DRAFT
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if ($this->_initialized) {
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return $this->_coll->contains($element);
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} else {
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if ($element is MANAGED) {
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if ($this->_coll->contains($element)) {
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return true;
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}
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$exists = check db for existence;
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if ($exists) {
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$this->_coll->add($element);
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}
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return $exists;
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}
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return false;
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}*/
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$this->_initialize();
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return $this->_coll->contains($element);
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}
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/**
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* {@inheritdoc}
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*/
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public function exists(Closure $p)
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{
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$this->_initialize();
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return $this->_coll->exists($p);
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}
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/**
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* {@inheritdoc}
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*/
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public function search($element)
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{
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$this->_initialize();
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return $this->_coll->search($element);
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}
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/**
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* {@inheritdoc}
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*/
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public function get($key)
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{
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$this->_initialize();
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return $this->_coll->get($key);
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}
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/**
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* {@inheritdoc}
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*/
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public function getKeys()
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{
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$this->_initialize();
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return $this->_coll->getKeys();
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}
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/**
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* {@inheritdoc}
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*/
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public function getValues()
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{
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$this->_initialize();
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return $this->_coll->getValues();
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}
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/**
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* {@inheritdoc}
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*/
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public function count()
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{
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$this->_initialize();
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return $this->_coll->count();
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}
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/**
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* {@inheritdoc}
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*/
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public function set($key, $value)
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{
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$this->_initialize();
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$this->_coll->set($key, $value);
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$this->_changed();
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}
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/**
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* {@inheritdoc}
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*/
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public function add($value)
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{
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$this->_coll->add($value);
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$this->_changed();
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return true;
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}
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/**
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* {@inheritdoc}
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*/
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public function isEmpty()
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{
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$this->_initialize();
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return $this->_coll->isEmpty();
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}
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/**
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* {@inheritdoc}
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*/
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public function getIterator()
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{
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$this->_initialize();
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return $this->_coll->getIterator();
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}
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/**
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* {@inheritdoc}
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*/
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public function map(Closure $func)
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{
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$this->_initialize();
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$result = $this->_coll->map($func);
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$this->_changed();
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return $result;
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}
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/**
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* {@inheritdoc}
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*/
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public function filter(Closure $p)
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{
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$this->_initialize();
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return $this->_coll->filter($p);
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}
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/**
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* {@inheritdoc}
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*/
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public function forAll(Closure $p)
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{
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$this->_initialize();
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return $this->_coll->forAll($p);
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}
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/**
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* {@inheritdoc}
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*/
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public function partition(Closure $p)
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{
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$this->_initialize();
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return $this->_coll->partition($p);
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}
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/**
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* {@inheritdoc}
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*/
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public function toArray()
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{
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$this->_initialize();
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return $this->_coll->toArray();
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}
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/**
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* {@inheritdoc}
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*/
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public function clear()
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{
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$this->_initialize();
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$result = $this->_coll->clear();
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if ($this->_association->isOwningSide) {
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$this->_changed();
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$this->_em->getUnitOfWork()->scheduleCollectionDeletion($this);
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}
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return $result;
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}
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/**
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* Called by PHP when this collection is serialized. Ensures that only the
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* elements are properly serialized.
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*
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* @internal Tried to implement Serializable first but that did not work well
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* with circular references. This solution seems simpler and works well.
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*/
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public function __sleep()
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{
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return array('_coll');
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}
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|
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/* ArrayAccess implementation */
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/**
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* @see containsKey()
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*/
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public function offsetExists($offset)
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{
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return $this->containsKey($offset);
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}
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|
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/**
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* @see get()
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*/
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public function offsetGet($offset)
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{
|
|
return $this->get($offset);
|
|
}
|
|
|
|
/**
|
|
* @see add()
|
|
* @see set()
|
|
*/
|
|
public function offsetSet($offset, $value)
|
|
{
|
|
if ( ! isset($offset)) {
|
|
return $this->add($value);
|
|
}
|
|
return $this->set($offset, $value);
|
|
}
|
|
|
|
/**
|
|
* @see remove()
|
|
*/
|
|
public function offsetUnset($offset)
|
|
{
|
|
return $this->remove($offset);
|
|
}
|
|
|
|
public function key()
|
|
{
|
|
return $this->_coll->key();
|
|
}
|
|
|
|
/**
|
|
* Gets the element of the collection at the current iterator position.
|
|
*/
|
|
public function current()
|
|
{
|
|
return $this->_coll->current();
|
|
}
|
|
|
|
/**
|
|
* Moves the internal iterator position to the next element.
|
|
*/
|
|
public function next()
|
|
{
|
|
return $this->_coll->next();
|
|
}
|
|
|
|
/**
|
|
* Retrieves the wrapped Collection instance.
|
|
*/
|
|
public function unwrap()
|
|
{
|
|
return $this->_coll;
|
|
}
|
|
}
|