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<?php
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/**
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* This file is part of the O2System Framework package.
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*
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* @author Steeve Andrian Salim
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* @copyright Copyright (c) Steeve Andrian Salim
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*/
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// ------------------------------------------------------------------------
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namespace O2System\Spl\Patterns\Creational\Singleton;
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/**
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* Class AbstractSingleton
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* @package O2System\Spl\Patterns\Creational\Singleton
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*/
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class AbstractSingleton implements InstanceInterface
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{
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/**
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* AbstractSingleton::$instance
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*
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* Singleton Instance
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*
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* @var static
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*/
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protected static $instance;
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// ------------------------------------------------------------------------
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/**
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* AbstractSingleton::__construct
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*
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* Protected constructor to prevent creating a new instance of the
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* *Singleton* via the `new` operator from outside of this class.
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*/
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protected function __construct()
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{
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static::$instance =& $this;
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}
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// ------------------------------------------------------------------------
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/**
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* AbstractSingleton::getInstance
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*
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* Returns the *Singleton* instance of this class.
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*
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* @return static Returns the instance class
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*/
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public static function getInstance()
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{
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if (empty(static::$instance)) {
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$className = get_called_class();
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static::$instance = new $className();
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if (method_exists(static::$instance, '__reconstruct')) {
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call_user_func_array([&static::$instance, '__reconstruct'], func_get_args());
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}
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}
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return static::$instance;
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}
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// ------------------------------------------------------------------------
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/**
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* AbstractSingleton::__clone
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*
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* Application of __clone magic method with private visibility to prevent cloning of
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* the *Singleton* instance.
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*
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* @return void
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*/
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protected function __clone()
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{
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}
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// ------------------------------------------------------------------------
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/**
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* AbstractSingleton::__wakeup
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*
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* Application of __wakeup magic method with private visibiliry to prevent unserializing of
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* the *Singleton* instance.
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*
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* @return void
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*/
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protected function __wakeup()
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{
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}
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} |
o2system /
spl
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