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<?php
namespace DeepCopy\TypeFilter\Spl;
use Closure;
use DeepCopy\DeepCopy;
use DeepCopy\TypeFilter\TypeFilter;
use SplDoublyLinkedList;
/**
* @final
*/
class SplDoublyLinkedListFilter implements TypeFilter
{
private $copier;
public function __construct(DeepCopy $copier)
{
$this->copier = $copier;
}
/**
* {@inheritdoc}
*/
public function apply($element)
{
$newElement = clone $element;
$copy = $this->createCopyClosure();
return $copy($newElement);
}
private function createCopyClosure()
{
$copier = $this->copier;
$copy = function (SplDoublyLinkedList $list) use ($copier) {
// Replace each element in the list with a deep copy of itself
for ($i = 1; $i <= $list->count(); $i++) {
$copy = $copier->recursiveCopy($list->shift());
$list->push($copy);
}
return $list;
};
return Closure::bind($copy, null, DeepCopy::class);
}
}
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