/**
* Return an instance of InputFilter
*
* @return InputFilter
*/
public function getInputFilter()
{
if (!isset($this->inputFilter)) {
$inputFilter = parent::getInputFilter();
// count
$count = new Input('count');
$count->setAllowEmpty(true);
$count->getFilterChain()->attach(new Int());
$count->getValidatorChain()->attach(new Digits());
$inputFilter->add($count);
$this->inputFilter = $inputFilter;
}
return $this->inputFilter;
}
