<?php /** * Zend Framework * * LICENSE * * This source file is subject to the new BSD license that is bundled * with this package in the file LICENSE.txt. * It is also available through the world-wide-web at this URL: * http://framework.zend.com/license/new-bsd * If you did not receive a copy of the license and are unable to * obtain it through the world-wide-web, please send an email * to license@zend.com so we can send you a copy immediately. * * @category Zend * @package Zend_EventManager * @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License */ require_once 'Zend/Stdlib/CallbackHandler.php'; require_once 'Zend/Stdlib/SplPriorityQueue.php'; /** * Specialized priority queue implementation for use with an intercepting * filter chain. * * Allows removal * * @category Zend * @package Zend_EventManager * @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License */ class Zend_EventManager_Filter_FilterIterator extends Zend_Stdlib_SplPriorityQueue { /** * Does the queue contain a given value? * * @param mixed $datum * @return bool */ public function contains($datum) { $chain = clone $this; foreach ($chain as $item) { if ($item === $datum) { return true; } } return false; } /** * Remove a value from the queue * * This is an expensive operation. It must first iterate through all values, * and then re-populate itself. Use only if absolutely necessary. * * @param mixed $datum * @return bool */ public function remove($datum) { $this->setExtractFlags(self::EXTR_BOTH); // Iterate and remove any matches $removed = false; $items = array(); $this->rewind(); while (!$this->isEmpty()) { $item = $this->extract(); if ($item['data'] === $datum) { $removed = true; continue; } $items[] = $item; } // Repopulate foreach ($items as $item) { $this->insert($item['data'], $item['priority']); } $this->setExtractFlags(self::EXTR_DATA); return $removed; } /** * Iterate the next filter in the chain * * Iterates and calls the next filter in the chain. * * @param mixed $context * @param array $params * @param Zend_EventManager_Filter_FilterIterator $chain * @return void */ public function next($context = null, array $params = array(), $chain = null) { if (empty($context) || $chain->isEmpty()) { return; } $next = $this->extract(); if (!$next instanceof Zend_Stdlib_CallbackHandler) { return; } $return = call_user_func($next->getCallback(), $context, $params, $chain); return $return; } }