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\Iterators
 7:  */
 8: 
 9: 
10: 
11: /**
12:  * Instance iterator filter.
13:  *
14:  * @author     David Grudl
15:  * @package Nette\Iterators
16:  */
17: class InstanceFilterIterator extends FilterIterator implements Countable
18: {
19:     /** @var string */
20:     private $type;
21: 
22: 
23:     /**
24:      * Constructs a filter around another iterator.
25:      * @param  Iterator
26:      * @param  string  class/interface name
27:      */
28:     public function __construct(Iterator $iterator, $type)
29:     {
30:         $this->type = $type;
31:         parent::__construct($iterator);
32:     }
33: 
34: 
35:     /**
36:      * Expose the current element of the inner iterator?
37:      * @return bool
38:      */
39:     public function accept()
40:     {
41:         return $this->current() instanceof $this->type;
42:     }
43: 
44: 
45:     /**
46:      * Returns the count of elements.
47:      * @return int
48:      */
49:     public function count()
50:     {
51:         return iterator_count($this);
52:     }
53: 
54: }
55: