69 lines
1.8 KiB
PHP
Executable File
69 lines
1.8 KiB
PHP
Executable File
<?php
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/*
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* OpenSTAManager: il software gestionale open source per l'assistenza tecnica e la fatturazione
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* Copyright (C) DevCode s.r.l.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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namespace Util;
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/**
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* Classe astratta per la generazione di oggetti istanziabili una singola volta.
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*
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* @since 2.3
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*/
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abstract class Singleton
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{
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/** @var Singleton Oggetti istanziati */
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protected static $instance = [];
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/**
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* Protected constructor to prevent creating a new instance of the <b>Singleton</b> via the `new` operator from outside of this class.
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*/
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protected function __construct()
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{
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}
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/**
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* Private clone method to prevent cloning of the instance of the <b>Singleton</b> instance.
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*/
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private function __clone()
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{
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}
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/**
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* Private unserialize method to prevent unserializing of the <b>Singleton</b> instance.
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*/
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private function __wakeup()
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{
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}
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/**
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* Restituisce l'istanza della classe in oggetto.
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*
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* @return Singleton
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*/
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public static function getInstance()
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{
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$class = static::class;
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if (!isset(self::$instance[$class])) {
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self::$instance[$class] = new static();
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}
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return self::$instance[$class];
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}
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}
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