3 * A filter chain for pre and post filters
5 * @author Roland Haeder <webmaster@ship-simu.org>
7 * @copyright Copyright(c) 2007, 2008 Roland Haeder, this is free software
8 * @license GNU GPL 3.0 or any newer version
9 * @link http://www.ship-simu.org
11 * This program is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 class FilterChain extends BaseFrameworkSystem {
26 * All filters together
28 private $filters = array();
35 protected function __construct () {
36 // Call parent constructor
37 parent::__construct(__CLASS__);
39 // Set part description
40 $this->setObjectDescription("");
42 // Create unique ID number
43 $this->createUniqueID();
46 $this->removeNumberFormaters();
47 $this->removeSystemArray();
51 * Creates an instance of this class
53 * @return $chainInstance An instance of this class
55 public final static function createFilterChain () {
57 $chainInstance = new FilterChain();
59 // Return the prepared instance
60 return $chainInstance;
66 * @param $filerInstance An instance of a filter class
69 public final function addFilter (Filterable $filterInstance) {
70 $this->filters[] = $filterInstance;
74 * Process all added filters
76 * @param $requestInstance An instance of a request class
77 * @param $responseInstance An instance of a response class
80 public function processFilters (Requestable $requestInstance, Responseable $responseInstance) {
82 //* DEBUG */ echo "COUNT=".count($this->filters)."<br />\n";
83 foreach ($this->filters as $filterInstance) {
84 // Execute this filter
85 //* DEBUG */ echo "FILTER: ".$filterInstance->__toString().": Processing started.<br />\n";
86 $filterInstance->execute($requestInstance, $responseInstance);
87 //* DEBUG */ echo "FILTER: ".$filterInstance->__toString().": Processing ended.<br />\n";