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/vendor/fusonic/linq/src/Fusonic/Linq/Iterator/IntersectIterator.php
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<?php
 
/*
* This file is part of Fusonic-linq.
* https://github.com/fusonic/fusonic-linq
*
* (c) Fusonic GmbH
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
 
namespace Fusonic\Linq\Iterator;
 
use ArrayIterator;
use Iterator;
 
class IntersectIterator implements Iterator
{
private $first;
private $second;
private $intersections;
 
public function __construct(Iterator $first, Iterator $second)
{
$this->first = $first;
$this->second = $second;
}
 
public function current()
{
return $this->intersections->current();
}
 
public function next()
{
$this->intersections->next();
}
 
public function key()
{
return $this->intersections->key();
}
 
public function valid()
{
return $this->intersections->valid();
}
 
public function rewind()
{
if ($this->intersections === null) {
$this->calcIntersections();
}
 
$this->intersections->rewind();
}
 
private function calcIntersections()
{
$firstArray = iterator_to_array($this->first);
$secondArray = iterator_to_array($this->second);
$this->intersections = new ArrayIterator(array_intersect($firstArray, $secondArray));
}
}