openstamanager/src/Util/Singleton.php

69 lines
1.8 KiB
PHP
Executable File

<?php
/*
* OpenSTAManager: il software gestionale open source per l'assistenza tecnica e la fatturazione
* Copyright (C) DevCode s.r.l.
*
* 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 <https://www.gnu.org/licenses/>.
*/
namespace Util;
/**
* Classe astratta per la generazione di oggetti istanziabili una singola volta.
*
* @since 2.3
*/
abstract class Singleton
{
/** @var Singleton Oggetti istanziati */
protected static $instance = [];
/**
* Protected constructor to prevent creating a new instance of the <b>Singleton</b> via the `new` operator from outside of this class.
*/
protected function __construct()
{
}
/**
* Private clone method to prevent cloning of the instance of the <b>Singleton</b> instance.
*/
private function __clone()
{
}
/**
* Private unserialize method to prevent unserializing of the <b>Singleton</b> instance.
*/
private function __wakeup()
{
}
/**
* Restituisce l'istanza della classe in oggetto.
*
* @return Singleton
*/
public static function getInstance()
{
$class = get_called_class();
if (!isset(self::$instance[$class])) {
self::$instance[$class] = new static();
}
return self::$instance[$class];
}
}