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15 * This software consists of voluntary contributions made by many individuals
16 * and is licensed under the MIT license. For more information, see
17 * <http://www.doctrine-project.org>.
20 namespace Doctrine\ORM\Id;
22 use Serializable, Doctrine\ORM\EntityManager;
25 * Represents an ID generator that uses the database UUID expression
28 * @author Maarten de Keizer <m.de.keizer@markei.nl>
30 class UuidGenerator extends AbstractIdGenerator
34 * Generates an ID for the given entity.
36 * @param Doctrine\ORM\EntityManager $em The EntityManager to user
37 * @param object $entity
38 * @return string The generated value.
41 public function generate(EntityManager $em, $entity)
43 $conn = $em->getConnection();
44 $sql = 'SELECT ' . $conn->getDatabasePlatform()->getGuidExpression();
45 return $conn->query($sql)->fetchColumn(0);