<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Config\Resource;
/**
* ClassExistenceResource represents a class existence.
* Freshness is only evaluated against resource existence.
*
* The resource must be a fully-qualified class name.
*
* @author Fabien Potencier <[email protected]>
*/
class ClassExistenceResource implements SelfCheckingResourceInterface, \Serializable
{
private $resource;
private $exists;
/**
* @param string $resource The fully-qualified class name
*/
public function __construct($resource)
{
$this->resource = $resource;
$this->exists = class_exists($resource);
}
/**
* {@inheritdoc}
*/
public function __toString()
{
return $this->resource;
}
/**
* @return string The file path to the resource
*/
public function getResource()
{
return $this->resource;
}
/**
* {@inheritdoc}
*/
public function isFresh($timestamp)
{
return class_exists($this->resource) === $this->exists;
}
/**
* {@inheritdoc}
*/
public function serialize()
{
return serialize(array($this->resource, $this->exists));
}
/**
* {@inheritdoc}
*/
public function unserialize($serialized)
{
list($this->resource, $this->exists) = unserialize($serialized);
}
}