<?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\Repository;

use Doctrine\ORM\EntityManagerInterface;

/**
 * This factory is used to create default repository objects for entities at runtime.
 *
 * @author Guilherme Blanco <guilhermeblanco@hotmail.com>
 * @since 2.4
 */
final class DefaultRepositoryFactory implements RepositoryFactory
{
    /**
     * The list of EntityRepository instances.
     *
     * @var \Doctrine\Common\Persistence\ObjectRepository[]
     */
    private $repositoryList = array();

    /**
     * {@inheritdoc}
     */
    public function getRepository(EntityManagerInterface $entityManager, $entityName)
    {
        $repositoryHash = $entityManager->getClassMetadata($entityName)->getName() . spl_object_hash($entityManager);

        if (isset($this->repositoryList[$repositoryHash])) {
            return $this->repositoryList[$repositoryHash];
        }

        return $this->repositoryList[$repositoryHash] = $this->createRepository($entityManager, $entityName);
    }

    /**
     * Create a new repository instance for an entity class.
     *
     * @param \Doctrine\ORM\EntityManagerInterface $entityManager The EntityManager instance.
     * @param string                               $entityName    The name of the entity.
     *
     * @return \Doctrine\Common\Persistence\ObjectRepository
     */
    private function createRepository(EntityManagerInterface $entityManager, $entityName)
    {
        /* @var $metadata \Doctrine\ORM\Mapping\ClassMetadata */
        $metadata            = $entityManager->getClassMetadata($entityName);
        $repositoryClassName = $metadata->customRepositoryClassName
            ?: $entityManager->getConfiguration()->getDefaultRepositoryClassName();

        return new $repositoryClassName($entityManager, $metadata);
    }
}
