<?php

/*

 * This file is part of the Symfony package.

 *

 * (c) Fabien Potencier <fabien@symfony.com>

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace Symfony\Component\Security\Acl\Domain;

use Symfony\Component\Security\Acl\Exception\InvalidDomainObjectException;

use Symfony\Component\Security\Acl\Model\ObjectIdentityRetrievalStrategyInterface;

/**

 * Strategy to be used for retrieving object identities from domain objects

 *

 * @author Johannes M. Schmitt <schmittjoh@gmail.com>

 */

class ObjectIdentityRetrievalStrategy implements ObjectIdentityRetrievalStrategyInterface

{

    /**

     * {@inheritDoc}

     */

    public function getObjectIdentity($domainObject)

    {

        try {

            return ObjectIdentity::fromDomainObject($domainObject);

        } catch (InvalidDomainObjectException $failed) {

            return null;

        }

    }

}