crm.fsf.org/20131203/files/sites/all/modules-old/civicrm/vendor/symfony/finder/Symfony/Component/Finder/Iterator/CustomFilterIterator.php

   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\Finder\Iterator;
  13
  14 /**
  15  * CustomFilterIterator filters files by applying anonymous functions.
  16  *
  17  * The anonymous function receives a \SplFileInfo and must return false
  18  * to remove files.
  19  *
  20  * @author Fabien Potencier <fabien@symfony.com>
  21  */
  22 class CustomFilterIterator extends FilterIterator
  23 {
  24     private $filters = array();
  25
  26     /**
  27      * Constructor.
  28      *
  29      * @param \Iterator  $iterator The Iterator to filter
  30      * @param callable[] $filters  An array of PHP callbacks
  31      *
  32      * @throws \InvalidArgumentException
  33      */
  34     public function __construct(\Iterator $iterator, array $filters)
  35     {
  36         foreach ($filters as $filter) {
  37             if (!is_callable($filter)) {
  38                 throw new \InvalidArgumentException('Invalid PHP callback.');
  39             }
  40         }
  41         $this->filters = $filters;
  42
  43         parent::__construct($iterator);
  44     }
  45
  46     /**
  47      * Filters the iterator values.
  48      *
  49      * @return bool true if the value should be kept, false otherwise
  50      */
  51     public function accept()
  52     {
  53         $fileinfo = $this->current();
  54
  55         foreach ($this->filters as $filter) {
  56             if (false === call_user_func($filter, $fileinfo)) {
  57                 return false;
  58             }
  59         }
  60
  61         return true;
  62     }
  63 }