77 lines
2.0 KiB
PHP
77 lines
2.0 KiB
PHP
<?php
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/**
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* Useful PHP Traits
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* Copyright (C) 2023 Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
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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 <http://www.gnu.org/licenses/>.
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*/
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namespace OCC\Traits;
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/**
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* Allows just a single instance of a class.
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*
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* @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
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* @package opencultureconsulting/traits
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* @access public
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*/
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trait Singleton
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{
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/**
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* Holds the singleton instances.
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*
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* @access protected
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* @static
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*
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* @var array
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*/
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protected static $singleton = [];
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/**
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* Get a singleton instance of this class.
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*
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* @access public
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* @final
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* @static
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*
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* @return self
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*/
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final public static function getInstance(): self
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{
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if (!isset(self::$singleton[__CLASS__])) {
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$reflectionClass = new \ReflectionClass(__CLASS__);
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self::$instance[__CLASS__] = $reflectionClass->newInstanceArgs(func_get_args());
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}
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return self::$singleton[__CLASS__];
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}
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/**
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* This is a singleton class, thus the constructor is protected.
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* (Get an instance of this class by calling self::getInstance())
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*
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* @access protected
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* @abstract
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*/
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abstract protected function __construct();
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/**
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* This is a singleton class, thus cloning is prohibited.
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*
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* @access protected
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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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