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doctrine2/lib/Doctrine/ORM/PersistentCollection.php

674 lines
17 KiB
PHP

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