+<?php
+/**
+ * A general Registry
+ *
+ * @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 BaseRegistry extends BaseFrameworkSystem {
+ /**
+ * Instance of this class
+ */
+ private static $registryInstance = null;
+
+ /**
+ * Instance registry
+ */
+ private $instanceRegistry = array();
+
+ /**
+ * Protected constructor
+ *
+ * @param $className Name of the class
+ * @return void
+ */
+ protected function __construct ($className) {
+ // Call parent constructor
+ parent::__construct($className);
+ }
+
+ /**
+ * 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]
+?>
+
projects / core.git / commitdiff