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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;
/**
* FileResource represents a resource stored on the filesystem.
*
* The resource can be a file or a directory.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class FileResource implements SelfCheckingResourceInterface, \Serializable
{
/**
* @var string|false
*/
private $resource;
/**
* Constructor.
*
* @param string $resource The file path to the resource
*
* @throws \InvalidArgumentException
*/
public function __construct($resource)
{
$this->resource = realpath($resource) ?: (file_exists($resource) ? $resource : false);
if (false === $this->resource) {
throw new \InvalidArgumentException(sprintf('The file "%s" does not exist.', $resource));
}
}
/**
* {@inheritdoc}
*/
public function __toString()
{
return $this->resource;
}
/**
* @return string The canonicalized, absolute path to the resource
*/
public function getResource()
{
return $this->resource;
}
/**
* {@inheritdoc}
*/
public function isFresh($timestamp)
{
return file_exists($this->resource) && @filemtime($this->resource) <= $timestamp;
}
public function serialize()
{
return serialize($this->resource);
}
public function unserialize($serialized)
{
$this->resource = unserialize($serialized);
}
}
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