class_Registry.php

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<?php
class Registry extends BaseFrameworkSystem implements Register {
        private static $selfInstance = null;

        private static $initialized = false;

        private $instanceRegistry = array();

        protected function __construct () {
                // Call parent constructor
                parent::__construct(__CLASS__);

                // Clean up a little
                $this->removeNumberFormaters();
                $this->removeSystemArray();
        }

        public final static function getRegistry () {
                // Is an instance there?
                if (is_null(self::$selfInstance)) {
                        // Not yet, so create one
                        self::$selfInstance = new Registry();
                }

                // Return the instance
                return self::$selfInstance;
        }

        public final static function isInitialized ($initialized = null) {
                if (is_null($initialized)) {
                        // Get status if initialized
                        return self::$initialized;
                } elseif (!is_null($initialized)) {
                        // Registry is initialized!
                        self::$initialized = true;
                }
        }

        public function instanceExists ($instanceKey) {
                // Does this key exists?
                $exists = (isset($this->instanceRegistry[$instanceKey]));

                // Return the result
                return $exists;
        }

        public function addInstance ($instanceKey, Registerable $objectInstance) {
                $this->instanceRegistry[$instanceKey] = $objectInstance;
        }

        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];
                }

                // Return the result
                return $objectInstance;
        }
}

// [EOF]
?>