69 lines
1.8 KiB
PHP
Executable File
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];
|
|
}
|
|
}
|