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<?php declare(strict_types = 1);
/*
** Zabbix
** Copyright (C) 2001-2021 Zabbix SIA
**
** 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 2 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, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
final class CComponentRegistry {
private $components = [];
/**
* Return registered component class instance.
*
* @param string $name Component name.
*
* @return object
*
* @throws Exception when component with $name is not found.
*/
final public function get(string $name): object {
if (!$this->has($name)) {
throw new Exception(_s('Component %1$s is not registered.', $name));
}
return $this->components[$name];
}
/**
* Register component.
*
* @param string $name Component name.
* @param object $instance Component class instance.
*
* @throws Exception when name is already registered.
*/
final public function register(string $name, object $instance): void {
if ($this->has($name)) {
throw new Exception(_s('Component %1$s already registered.', $name));
}
$this->components[$name] = $instance;
}
/**
* Check if а component has been registered.
*
* @param string $name Component name.
*
* @return bool
*/
final public function has(string $name): bool {
return array_key_exists($name, $this->components);
}
/**
* Magic method to allow short syntax for the component instance get.
*
* @param string $name Component name.
*
* @return object
*
* @throws Exception when component with $name is not found.
*/
final public function __get(string $name): object {
return $this->get($name);
}
/**
* Magic method to allow short syntax for the component registration.
*
* @param string $name Requested property name.
* @param object $instance Component class instance.
*
* @throws Exception when name is already registered.
*/
final public function __set(string $name, object $instance): void {
$this->register($name, $instance);
}
}
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