3 * A factory class for unit sources
5 * @author Roland Haeder <webmaster@ship-simu.org>
7 * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2011 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 UnitSourceFactory extends ObjectFactory {
28 private static $sourceInstances = array();
31 * Protected constructor
35 protected function __construct () {
36 // Call parent constructor
37 parent::__construct(__CLASS__);
41 * Creates an instance of a configurable and singleton unit source
43 * @param $unitType Type of the unit source
44 * @return $sourceInstance A Sourceable class instance
46 public static final function createUnitSourceInstance ($unitType) {
48 if (!isset(self::$sourceInstances[$unitType])) {
49 // Then construct the class' configuraton entry
50 $className = '' . $unitType . '_unit_source_class';
52 // Get a class from that configuration entry
53 self::$sourceInstances[$unitType] = self::createObjectByConfiguredName($className);
56 // For any purposes, return the source instance
57 return self::$sourceInstances[$unitType];