<?php
/**
* User: delboy1978uk
* Date: 27/11/2016
* Time: 13:41
*/
namespace Del\Form\Collection;
use Del\Form\Filter\FilterInterface;
use InvalidArgumentException;
class FilterCollection extends AbstractCollection implements CollectionInterface
{
/**
* @param FilterInterface $filter Pass in a filter
* @return $this
*/
public function append($filter)
{
if (!$filter instanceof FilterInterface) {
throw new InvalidArgumentException('You can only append a Del\Form\Filter\FilterInterface.');
}
parent::append($filter);
return $this;
}
/**
* @return FilterInterface
*/
public function current()
{
return parent::current();
}
}
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