1: <?php
 2: 
 3: /**
 4:  * This file is part of the Nette Framework (https://nette.org)
 5:  * Copyright (c) 2004 David Grudl (http://davidgrudl.com)
 6:  * @package Nette\Caching\Storages
 7:  */
 8: 
 9: 
10: 
11: /**
12:  * Memory cache storage.
13:  *
14:  * @author     David Grudl
15:  * @package Nette\Caching\Storages
16:  */
17: class MemoryStorage extends Object implements ICacheStorage
18: {
19:     /** @var array */
20:     private $data = array();
21: 
22: 
23:     /**
24:      * Read from cache.
25:      * @param  string key
26:      * @return mixed|NULL
27:      */
28:     public function read($key)
29:     {
30:         return isset($this->data[$key]) ? $this->data[$key] : NULL;
31:     }
32: 
33: 
34:     /**
35:      * Prevents item reading and writing. Lock is released by write() or remove().
36:      * @param  string key
37:      * @return void
38:      */
39:     public function lock($key)
40:     {
41:     }
42: 
43: 
44:     /**
45:      * Writes item into the cache.
46:      * @param  string key
47:      * @param  mixed  data
48:      * @param  array  dependencies
49:      * @return void
50:      */
51:     public function write($key, $data, array $dependencies)
52:     {
53:         $this->data[$key] = $data;
54:     }
55: 
56: 
57:     /**
58:      * Removes item from the cache.
59:      * @param  string key
60:      * @return void
61:      */
62:     public function remove($key)
63:     {
64:         unset($this->data[$key]);
65:     }
66: 
67: 
68:     /**
69:      * Removes items from the cache by conditions & garbage collector.
70:      * @param  array  conditions
71:      * @return void
72:      */
73:     public function clean(array $conditions)
74:     {
75:         if (!empty($conditions[Cache::ALL])) {
76:             $this->data = array();
77:         }
78:     }
79: 
80: }
81: