1: <?php
 2: 
 3: /*
 4:  * This file is part of the Symfony package.
 5:  *
 6:  * (c) Fabien Potencier <fabien@symfony.com>
 7:  *
 8:  * For the full copyright and license information, please view the LICENSE
 9:  * file that was distributed with this source code.
10:  */
11: 
12: namespace Symfony\Component\Config\Resource;
13: 
14: /**
15:  * FileResource represents a resource stored on the filesystem.
16:  *
17:  * The resource can be a file or a directory.
18:  *
19:  * @author Fabien Potencier <fabien@symfony.com>
20:  */
21: class FileResource implements ResourceInterface, \Serializable
22: {
23:     private $resource;
24: 
25:     /**
26:      * Constructor.
27:      *
28:      * @param string $resource The file path to the resource
29:      */
30:     public function __construct($resource)
31:     {
32:         $this->resource = realpath($resource);
33:     }
34: 
35:     /**
36:      * Returns a string representation of the Resource.
37:      *
38:      * @return string A string representation of the Resource
39:      */
40:     public function __toString()
41:     {
42:         return (string) $this->resource;
43:     }
44: 
45:     /**
46:      * Returns the resource tied to this Resource.
47:      *
48:      * @return mixed The resource
49:      */
50:     public function getResource()
51:     {
52:         return $this->resource;
53:     }
54: 
55:     /**
56:      * Returns true if the resource has not been updated since the given timestamp.
57:      *
58:      * @param integer $timestamp The last time the resource was loaded
59:      *
60:      * @return Boolean true if the resource has not been updated, false otherwise
61:      */
62:     public function isFresh($timestamp)
63:     {
64:         if (!file_exists($this->resource)) {
65:             return false;
66:         }
67: 
68:         return filemtime($this->resource) < $timestamp;
69:     }
70: 
71:     public function serialize()
72:     {
73:         return serialize($this->resource);
74:     }
75: 
76:     public function unserialize($serialized)
77:     {
78:         $this->resource = unserialize($serialized);
79:     }
80: }
81: