vendor/doctrine/orm/lib/Doctrine/ORM/EntityManagerInterface.php

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<?php
/*
 * 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 MIT license. For more information, see
 * <http://www.doctrine-project.org>.
 */

namespace Doctrine\ORM;

use Doctrine\Common\Persistence\ObjectManager;
use Doctrine\ORM\Query\ResultSetMapping;

/**
 * EntityManager interface
 *
 * @since   2.4
 * @author  Lars Strojny <lars@strojny.net
 */
interface EntityManagerInterface extends ObjectManager
{
    /**
     * Gets the database connection object used by the EntityManager.
     *
     * @return \Doctrine\DBAL\Connection
     */
    public function getConnection();

    /**
     * Gets an ExpressionBuilder used for object-oriented construction of query expressions.
     *
     * Example:
     *
     * <code>
     *     $qb = $em->createQueryBuilder();
     *     $expr = $em->getExpressionBuilder();
     *     $qb->select('u')->from('User', 'u')
     *         ->where($expr->orX($expr->eq('u.id', 1), $expr->eq('u.id', 2)));
     * </code>
     *
     * @return \Doctrine\ORM\Query\Expr
     */
    public function getExpressionBuilder();

    /**
     * Starts a transaction on the underlying database connection.
     *
     * @return void
     */