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testMinimumPhpVersion.php
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Singleton.php
67 lines
| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * Matomo - free/libre analytics platform |
| 5 | * |
| 6 | * @link https://matomo.org |
| 7 | * @license https://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later |
| 8 | */ |
| 9 | namespace Piwik; |
| 10 | |
| 11 | /** |
| 12 | * The singleton base class restricts the instantiation of derived classes to one object only. |
| 13 | * |
| 14 | * All plugin APIs are singletons and thus extend this class. |
| 15 | * |
| 16 | * @api |
| 17 | */ |
| 18 | class Singleton |
| 19 | { |
| 20 | protected static $instances; |
| 21 | protected function __construct() |
| 22 | { |
| 23 | } |
| 24 | protected final function __clone() |
| 25 | { |
| 26 | } |
| 27 | /** |
| 28 | * Returns the singleton instance for the derived class. If the singleton instance |
| 29 | * has not been created, this method will create it. |
| 30 | * |
| 31 | * @return static |
| 32 | */ |
| 33 | public static function getInstance() |
| 34 | { |
| 35 | $class = get_called_class(); |
| 36 | if (!isset(self::$instances[$class])) { |
| 37 | self::$instances[$class] = new $class(); |
| 38 | } |
| 39 | return self::$instances[$class]; |
| 40 | } |
| 41 | /** |
| 42 | * Used in tests only |
| 43 | * @ignore |
| 44 | */ |
| 45 | public static function unsetInstance() |
| 46 | { |
| 47 | $class = get_called_class(); |
| 48 | unset(self::$instances[$class]); |
| 49 | } |
| 50 | /** |
| 51 | * Sets the singleton instance. For testing purposes. |
| 52 | * @ignore |
| 53 | */ |
| 54 | public static function setSingletonInstance($instance) |
| 55 | { |
| 56 | $class = get_called_class(); |
| 57 | self::$instances[$class] = $instance; |
| 58 | } |
| 59 | /** |
| 60 | * @ignore |
| 61 | */ |
| 62 | public static function clearAll() |
| 63 | { |
| 64 | self::$instances = array(); |
| 65 | } |
| 66 | } |
| 67 |