3 * A factory class for URL sources
5 * @author Roland Haeder <webmaster@ship-simu.org>
7 * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2015 Hub Developer Team
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 UrlSourceObjectFactory extends ObjectFactory {
26 * Protected constructor
30 protected function __construct () {
31 // Call parent constructor
32 parent::__construct(__CLASS__);
36 * Returns a singleton (registry-based) UrlSource instance
38 * @param $taskInstance An instance of a class with an Taskable interface
39 * @return $sourceInstance An instance of a UrlSource class
41 public static final function createUrlSourceInstance (Taskable $taskInstance) {
42 // Get new factory instance
43 $factoryInstance = new UrlSourceObjectFactory();
45 // Get task handler instance
46 $handlerInstance = Registry::getRegistry()->getInstance('task_handler');
48 // Get source type by looking for given task instance in task handler
49 $sourceType = $handlerInstance->searchTask($taskInstance);
51 // Only let registered tasks pass
52 assert(!empty($sourceType));
54 // If there is no handler?
55 if (Registry::getRegistry()->instanceExists('source_' . $sourceType)) {
56 // Get handler from registry
57 $sourceInstance = Registry::getRegistry()->getInstance('source_' . $sourceType);
59 // Get the source instance
60 $sourceInstance = ObjectFactory::createObjectByConfiguredName($sourceType . '_class');
62 // Add it to the registry
63 Registry::getRegistry()->addInstance('source_' . $sourceType, $sourceInstance);
66 // Return the instance
67 return $sourceInstance;