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<?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\Model;
/**
* Represents the identity of an individual domain object instance.
*
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
interface ObjectIdentityInterface
{
/**
* We specifically require this method so we can check for object equality
* explicitly, and do not have to rely on referencial equality instead.
*
* Though in most cases, both checks should result in the same outcome.
*
* Referential Equality: $object1 === $object2
* Example for Object Equality: $object1->getId() === $object2->getId()
*
* @param ObjectIdentityInterface $identity
* @return Boolean
*/
function equals(ObjectIdentityInterface $identity);
/**
* Obtains a unique identifier for this object. The identifier must not be
* re-used for other objects with the same type.
*
* @return string cannot return null
*/
function getIdentifier();
/**
* Returns a type for the domain object. Typically, this is the PHP class name.
*
* @return string cannot return null
*/
function getType();
}
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