FileExistenceResource.php
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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\Config\Resource;
/**
* FileExistenceResource represents a resource stored on the filesystem.
* Freshness is only evaluated against resource creation or deletion.
*
* The resource can be a file or a directory.
*
* @author Charles-Henri Bruyand <charleshenri.bruyand@gmail.com>
*/
class FileExistenceResource implements SelfCheckingResourceInterface, \Serializable
{
private $resource;
private $exists;
/**
* Constructor.
*
* @param string $resource The file path to the resource
*/
public function __construct($resource)
{
$this->resource = (string) $resource;
$this->exists = file_exists($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 file_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);
}
}