602 lines
17 KiB
PHP
602 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\Common\EventManager;
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use Doctrine\Common\DoctrineException;
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use Doctrine\DBAL\Connection;
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use Doctrine\ORM\Mapping\ClassMetadata;
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use Doctrine\ORM\Mapping\ClassMetadataFactory;
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use Doctrine\ORM\Proxy\ProxyFactory;
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use Doctrine\ORM\Proxy\ProxyClassGenerator;
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/**
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* The EntityManager is the central access point to ORM functionality.
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*
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @link www.doctrine-project.org
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* @since 2.0
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* @version $Revision$
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* @author Roman Borschel <roman@code-factory.org>
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*/
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class EntityManager
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{
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/**
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* IMMEDIATE: Flush occurs automatically after each operation that issues database
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* queries. No operations are queued.
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*/
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const FLUSHMODE_IMMEDIATE = 1;
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/**
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* AUTO: Flush occurs automatically in the following situations:
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* - Before any query executions (to prevent getting stale data)
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* - On EntityManager#commit()
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*/
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const FLUSHMODE_AUTO = 2;
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/**
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* COMMIT: Flush occurs automatically only on EntityManager#commit().
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*/
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const FLUSHMODE_COMMIT = 3;
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/**
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* MANUAL: Flush occurs never automatically. The only way to flush is
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* through EntityManager#flush().
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*/
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const FLUSHMODE_MANUAL = 4;
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/**
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* The used Configuration.
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*
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* @var Doctrine\ORM\Configuration
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*/
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private $_config;
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/**
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* The database connection used by the EntityManager.
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*
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* @var Doctrine\DBAL\Connection
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*/
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private $_conn;
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/**
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* The metadata factory, used to retrieve the ORM metadata of entity classes.
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*
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* @var Doctrine\ORM\Mapping\ClassMetadataFactory
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*/
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private $_metadataFactory;
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/**
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* The EntityRepository instances.
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*
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* @var array
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*/
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private $_repositories = array();
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/**
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* The currently used flush mode. Defaults to 'commit'.
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*
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* @var string
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*/
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private $_flushMode = self::FLUSHMODE_COMMIT;
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/**
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* The UnitOfWork used to coordinate object-level transactions.
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*
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* @var Doctrine\ORM\UnitOfWork
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*/
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private $_unitOfWork;
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/**
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* The event manager that is the central point of the event system.
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*
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* @var Doctrine\Common\EventManager
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*/
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private $_eventManager;
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/**
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* The maintained (cached) hydrators. One instance per type.
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*
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* @var array
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*/
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private $_hydrators = array();
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/**
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* The proxy factory which creates association or reference proxies.
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*
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* @var ProxyFactory
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*/
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private $_proxyFactory;
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/**
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* Whether the EntityManager is closed or not.
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*/
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private $_closed = false;
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/**
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* Creates a new EntityManager that operates on the given database connection
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* and uses the given Configuration and EventManager implementations.
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*
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* @param Doctrine\DBAL\Connection $conn
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* @param string $name
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* @param Doctrine\ORM\Configuration $config
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* @param Doctrine\Common\EventManager $eventManager
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*/
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protected function __construct(Connection $conn, Configuration $config, EventManager $eventManager)
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{
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$this->_conn = $conn;
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$this->_config = $config;
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$this->_eventManager = $eventManager;
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$this->_metadataFactory = new ClassMetadataFactory($this);
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$this->_metadataFactory->setCacheDriver($this->_config->getMetadataCacheImpl());
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$this->_unitOfWork = new UnitOfWork($this);
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//FIX: this should be in a factory
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$this->_proxyFactory = new ProxyFactory($this, new ProxyClassGenerator($this, $this->_config->getCacheDir()));
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}
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/**
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* Gets the database connection object used by the EntityManager.
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*
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* @return Doctrine\DBAL\Connection
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*/
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public function getConnection()
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{
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return $this->_conn;
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}
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/**
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* Gets the metadata factory used to gather the metadata of classes.
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*
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* @return Doctrine\ORM\Mapping\ClassMetadataFactory
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*/
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public function getMetadataFactory()
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{
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return $this->_metadataFactory;
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}
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/**
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* Starts a transaction on the underlying database connection.
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*/
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public function beginTransaction()
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{
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$this->_conn->beginTransaction();
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}
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/**
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* Commits a running transaction.
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*
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* This causes a flush() of the EntityManager if the flush mode is set to
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* AUTO or COMMIT.
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*/
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public function commit()
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{
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if ($this->_flushMode == self::FLUSHMODE_AUTO || $this->_flushMode == self::FLUSHMODE_COMMIT) {
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$this->flush();
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}
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$this->_conn->commit();
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}
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/**
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* Performs a rollback on the underlying database connection and closes the
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* EntityManager as it may now be in a corrupted state.
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*/
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public function rollback()
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{
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$this->_conn->rollback();
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$this->close();
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}
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/**
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* Returns the metadata for a class.
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*
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* @return Doctrine\ORM\Mapping\ClassMetadata
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* @internal Performance-sensitive method.
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*/
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public function getClassMetadata($className)
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{
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return $this->_metadataFactory->getMetadataFor($className);
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}
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/**
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* Creates a new Query object.
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*
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* @param string The DQL string.
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* @return Doctrine\ORM\Query
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*/
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public function createQuery($dql = "")
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{
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$query = new Query($this);
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if ( ! empty($dql)) {
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$query->setDql($dql);
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}
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return $query;
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}
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/**
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* Creates a DQL query with the specified name.
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*
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* @todo Implementation.
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* @throws DoctrineException If there is no query registered with the given name.
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*/
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public function createNamedQuery($name)
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{
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//...
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}
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/**
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* Creates a native SQL query.
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*
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* @param string $sql
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* @param ResultSetMapping $rsm The ResultSetMapping to use.
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* @return Query
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*/
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public function createNativeQuery($sql, \Doctrine\ORM\Query\ResultSetMapping $rsm)
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{
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$query = new NativeQuery($this);
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$query->setSql($sql);
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$query->setResultSetMapping($rsm);
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return $query;
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}
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/**
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* @todo Implementation.
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*/
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public function createNamedNativeQuery($name)
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{
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//...
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}
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/**
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* Create a QueryBuilder instance
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*
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* @return QueryBuilder $qb
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*/
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public function createQueryBuilder()
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{
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return new QueryBuilder($this);
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}
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/**
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* Flushes all changes to objects that have been queued up to now to the database.
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* This effectively synchronizes the in-memory state of managed objects with the
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* database.
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*/
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public function flush()
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{
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$this->_errorIfClosed();
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$this->_unitOfWork->commit();
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}
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/**
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* Finds an Entity by its identifier.
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*
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* This is just a convenient shortcut for getRepository($entityName)->find($id).
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*
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* @param string $entityName
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* @param mixed $identifier
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* @return object
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*/
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public function find($entityName, $identifier)
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{
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return $this->getRepository($entityName)->find($identifier);
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}
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/**
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* Gets a reference to the entity identified by the given type and identifier
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* without actually loading it. Only the identifier of the returned entity
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* will be populated.
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*
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* NOTE: There is currently no magic proxying in place, that means the full state
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* of the entity will not be loaded upon accessing it.
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*
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* @return object The entity reference.
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*/
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public function getReference($entityName, $identifier)
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{
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$entity = new $entityName;
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$this->getClassMetadata($entityName)->setEntityIdentifier($entity, $identifier);
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return $entity;
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}
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/**
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* Sets the flush mode to use.
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*
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* @param string $flushMode
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*/
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public function setFlushMode($flushMode)
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{
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if ( ! $this->_isFlushMode($flushMode)) {
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throw EntityManagerException::invalidFlushMode();
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}
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$this->_flushMode = $flushMode;
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}
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/**
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* Checks whether the given value is a valid flush mode.
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*
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* @param string $value
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* @return boolean
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*/
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private function _isFlushMode($value)
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{
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return $value >= 1 && $value <= 4;
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}
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/**
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* Gets the currently used flush mode.
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*
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* @return string
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*/
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public function getFlushMode()
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{
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return $this->_flushMode;
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}
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/**
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* Clears the EntityManager. All entities that are currently managed
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* by this EntityManager become detached.
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*
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* @param string $entityName
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*/
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public function clear($entityName = null)
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{
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if ($entityName === null) {
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$this->_unitOfWork->clear();
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} else {
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//TODO
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throw DoctrineException::notImplemented();
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}
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}
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/**
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* Closes the EntityManager. All entities that are currently managed
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* by this EntityManager become detached. The EntityManager may no longer
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* be used after it is closed.
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*/
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public function close()
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{
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$this->clear();
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$this->_closed = true;
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}
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/**
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* Saves the given entity, persisting it's state.
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*
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* @param object $object
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*/
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public function save($object)
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{
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$this->_errorIfClosed();
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$this->_unitOfWork->save($object);
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if ($this->_flushMode == self::FLUSHMODE_IMMEDIATE) {
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$this->flush();
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}
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}
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/**
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* Deletes the persistent state of the given entity.
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*
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* @param object $entity
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*/
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public function delete($entity)
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{
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$this->_errorIfClosed();
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$this->_unitOfWork->delete($entity);
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if ($this->_flushMode == self::FLUSHMODE_IMMEDIATE) {
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$this->flush();
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}
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}
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/**
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* Refreshes the persistent state of the entity from the database,
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* overriding any local changes that have not yet been persisted.
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*
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* @param object $entity
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* @todo Implementation
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*/
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public function refresh($entity)
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{
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$this->_errorIfClosed();
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throw DoctrineException::notImplemented();
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}
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/**
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* Detaches an entity from the EntityManager. Its lifecycle is no longer managed.
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*
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* @param object $entity The entity to detach.
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* @return boolean
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*/
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public function detach($entity)
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{
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return $this->_unitOfWork->removeFromIdentityMap($entity);
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}
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/**
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* Merges the state of a detached entity into the persistence context
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* of this EntityManager.
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*
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* @param object $entity The entity to merge into the persistence context.
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* @return object The managed copy of the entity.
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*/
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public function merge($entity)
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{
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return $this->_unitOfWork->merge($entity);
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}
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/**
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* Creates a copy of the given entity. Can create a shallow or a deep copy.
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*
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* @param object $entity The entity to copy.
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* @return object The new entity.
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* @todo Implementation or remove.
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*/
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public function copy($entity, $deep = false)
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{
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throw DoctrineException::notImplemented();
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}
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/**
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* Gets the repository for an entity class.
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*
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* @param string $entityName The name of the Entity.
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* @return EntityRepository The repository.
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*/
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public function getRepository($entityName)
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{
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if (isset($this->_repositories[$entityName])) {
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return $this->_repositories[$entityName];
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}
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$metadata = $this->getClassMetadata($entityName);
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$customRepositoryClassName = $metadata->getCustomRepositoryClass();
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if ($customRepositoryClassName !== null) {
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$repository = new $customRepositoryClassName($entityName, $metadata);
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} else {
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$repository = new EntityRepository($this, $metadata);
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}
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$this->_repositories[$entityName] = $repository;
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return $repository;
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}
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/**
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* Checks if the instance is managed by the EntityManager.
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*
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* @param object $entity
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* @return boolean TRUE if this EntityManager currently manages the given entity
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* (and has it in the identity map), FALSE otherwise.
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*/
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public function contains($entity)
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{
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return $this->_unitOfWork->isInIdentityMap($entity) &&
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! $this->_unitOfWork->isRegisteredRemoved($entity);
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}
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/**
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* Gets the EventManager used by the EntityManager.
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*
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* @return Doctrine\Common\EventManager
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*/
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public function getEventManager()
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{
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return $this->_eventManager;
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}
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/**
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* Gets the Configuration used by the EntityManager.
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*
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* @return Doctrine\ORM\Configuration
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*/
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public function getConfiguration()
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{
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return $this->_config;
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}
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/**
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* Throws an exception if the EntityManager is closed or currently not active.
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*
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* @throws EntityManagerException If the EntityManager is closed or not active.
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*/
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private function _errorIfClosed()
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{
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if ($this->_closed) {
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throw EntityManagerException::notActiveOrClosed();
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}
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}
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/**
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* Gets the UnitOfWork used by the EntityManager to coordinate operations.
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*
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* @return Doctrine\ORM\UnitOfWork
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*/
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public function getUnitOfWork()
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{
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return $this->_unitOfWork;
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}
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/**
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* Gets a hydrator for the given hydration mode.
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*
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* @param $hydrationMode
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*/
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public function getHydrator($hydrationMode)
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{
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if ( ! isset($this->_hydrators[$hydrationMode])) {
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switch ($hydrationMode) {
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case Query::HYDRATE_OBJECT:
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$this->_hydrators[$hydrationMode] = new \Doctrine\ORM\Internal\Hydration\ObjectHydrator($this);
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break;
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case Query::HYDRATE_ARRAY:
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$this->_hydrators[$hydrationMode] = new \Doctrine\ORM\Internal\Hydration\ArrayHydrator($this);
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break;
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case Query::HYDRATE_SCALAR:
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$this->_hydrators[$hydrationMode] = new \Doctrine\ORM\Internal\Hydration\ScalarHydrator($this);
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break;
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case Query::HYDRATE_SINGLE_SCALAR:
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$this->_hydrators[$hydrationMode] = new \Doctrine\ORM\Internal\Hydration\SingleScalarHydrator($this);
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break;
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case Query::HYDRATE_NONE:
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$this->_hydrators[$hydrationMode] = new \Doctrine\ORM\Internal\Hydration\NoneHydrator($this);
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break;
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default:
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throw DoctrineException::updateMe("No hydrator found for hydration mode '$hydrationMode'.");
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}
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}
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return $this->_hydrators[$hydrationMode];
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}
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/**
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* Gets the proxy factory used by the EntityManager to create entity proxies.
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*
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* @return ProxyFactory
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*/
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public function getProxyGenerator()
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{
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return $this->_proxyFactory;
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}
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/**
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* Factory method to create EntityManager instances.
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*
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* @param mixed $conn An array with the connection parameters or an existing
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* Connection instance.
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* @param string $name The name of the EntityManager.
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* @param Configuration $config The Configuration instance to use.
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* @param EventManager $eventManager The EventManager instance to use.
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* @return EntityManager The created EntityManager.
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*/
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public static function create($conn, Configuration $config = null, EventManager $eventManager = null)
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{
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if (is_array($conn)) {
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$conn = \Doctrine\DBAL\DriverManager::getConnection($conn, $config, $eventManager);
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} else if ( ! $conn instanceof Connection) {
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throw DoctrineException::updateMe("Invalid parameter '$conn'.");
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}
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if ($config === null) {
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$config = new Configuration();
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}
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if ($eventManager === null) {
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$eventManager = new EventManager();
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}
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return new EntityManager($conn, $config, $eventManager);
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}
|
|
}
|