forked from vergnet/site-accueil-insa
74 lines
1.5 KiB
PHP
74 lines
1.5 KiB
PHP
<?php
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/**
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* Matomo - free/libre analytics platform
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*
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* @link https://matomo.org
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* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
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*
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*/
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namespace Piwik;
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/**
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* The singleton base class restricts the instantiation of derived classes to one object only.
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*
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* All plugin APIs are singletons and thus extend this class.
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*
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* @api
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*/
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class Singleton
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{
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protected static $instances;
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protected function __construct()
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{
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}
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final protected function __clone()
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{
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}
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/**
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* Returns the singleton instance for the derived class. If the singleton instance
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* has not been created, this method will create it.
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*
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* @return static
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*/
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public static function getInstance()
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{
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$class = get_called_class();
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if (!isset(self::$instances[$class])) {
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self::$instances[$class] = new $class;
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}
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return self::$instances[$class];
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}
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/**
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* Used in tests only
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* @ignore
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*/
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public static function unsetInstance()
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{
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$class = get_called_class();
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unset(self::$instances[$class]);
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}
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/**
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* Sets the singleton instance. For testing purposes.
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* @ignore
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*/
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public static function setSingletonInstance($instance)
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{
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$class = get_called_class();
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self::$instances[$class] = $instance;
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}
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/**
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* @ignore
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*/
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public static function clearAll()
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{
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self::$instances = array();
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}
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}
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