+++ /dev/null
-<?php
-/**
- * A registry for several data types and objects. Objects should be added by
- * addInstance() and therefore must implement the interface Registerable.
- *
- * @author Roland Haeder <webmaster@ship-simu.org>
- * @version 0.0.0
- * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009, 2010 Core Developer Team
- * @license GNU GPL 3.0 or any newer version
- * @link http://www.ship-simu.org
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-class Registry extends BaseFrameworkSystem implements Register {
- /**
- * Instance of this class
- */
- private static $registryInstance = null;
-
- /**
- * Instance registry
- */
- private $instanceRegistry = array();
-
- /**
- * Protected constructor
- *
- * @return void
- */
- protected function __construct () {
- // Call parent constructor
- parent::__construct(__CLASS__);
- }
-
- /**
- * Singleton getter for self instance. This class has no factory pattern
- * because here is no need for special parameters.
- *
- * @return $registryInstance Instance of this class
- */
- public final static function getRegistry () {
- // Is an instance there?
- if (is_null(self::$registryInstance)) {
- // Not yet, so create one
- self::$registryInstance = new Registry();
- } // END - if
-
- // Return the instance
- return self::$registryInstance;
- }
-
- /**
- * Checks wether an instance key was found
- *
- * @param $instanceKey The key holding an instance in registry
- * @return $exists Wether the key exists in registry
- */
- public function instanceExists ($instanceKey) {
- // Does this key exists?
- $exists = (isset($this->instanceRegistry[$instanceKey]));
-
- // Return the result
- return $exists;
- }
-
- /**
- * Adds/overwrites a new instance to the registry at the given key
- *
- * @param $instanceKey The key to identify the instance
- * @param $objectInstance An instance we shall store
- * @return void
- */
- public function addInstance ($instanceKey, Registerable $objectInstance) {
- $this->instanceRegistry[$instanceKey] = $objectInstance;
- }
-
- /**
- * Gets a registered instance or null if not found
- *
- * @param $instanceKey The key to identify the instance
- * @return $objectInstance An instance we shall store
- * @throws NullPointerException If the requested key is not found
- */
- public function getInstance ($instanceKey) {
- // By default the instance is not in registry
- $objectInstance = null;
-
- // Is the instance there?
- if ($this->instanceExists($instanceKey)) {
- $objectInstance = $this->instanceRegistry[$instanceKey];
- } // END - if
-
- // Still not fetched?
- if (is_null($objectInstance)) {
- // This might happen if a non-registered key was requested
- throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
- } // END - if
-
- // Return the result
- return $objectInstance;
- }
-}
-
-// [EOF]
-?>