/**
* Executes the pre-filter action.
*
* This method applies the pre-filter actions to the passed response. It
* executes any piped filters first.
*
* @param T_Response $response response object to apply filter to
*/
function preFilter(T_Response $response)
{
if ($this->filter) {
$this->filter->preFilter($response);
}
$this->doPreFilter($response);
$this->is_exe = true;
}
/**
* Append a filter to the end of the current filter chain.
*
* @param T_Response_Filter $filter filter to apply
* @param mixed $key optional filter access key
*/
function appendFilter(T_Response_Filter $filter, $key = null)
{
if (!is_null($key) && !array_key_exists($key, $this->filter)) {
$this->filter[$key] = $filter;
} elseif (is_null($key)) {
$this->filter[] = $filter;
} else {
throw new InvalidArgumentException("existing key {$key}");
}
/* filter is stored BEFORE pre-filtering in case a redirect is thrown in
the prefilter process. */
$filter->preFilter($this);
}
