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<?php
/**
* Copyright 2014
*
* 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.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
/**
* Factory class to create Config objects
*
* @since 1.23
*/
class ConfigFactory {
/**
* Map of config name => callback
* @var array
*/
protected $factoryFunctions = [];
/**
* Config objects that have already been created
* name => Config object
* @var array
*/
protected $configs = [];
/**
* @deprecated since 1.27, use MediaWikiServices::getConfigFactory() instead.
*
* @return ConfigFactory
*/
public static function getDefaultInstance() {
return \MediaWiki\MediaWikiServices::getInstance()->getConfigFactory();
}
/**
* Register a new config factory function
* Will override if it's already registered
* @param string $name
* @param callable $callback That takes this ConfigFactory as an argument
* @throws InvalidArgumentException If an invalid callback is provided
*/
public function register( $name, $callback ) {
if ( !is_callable( $callback ) ) {
throw new InvalidArgumentException( 'Invalid callback provided' );
}
$this->factoryFunctions[$name] = $callback;
}
/**
* Create a given Config using the registered callback for $name.
* If an object was already created, the same Config object is returned.
* @param string $name Name of the extension/component you want a Config object for
* 'main' is used for core
* @throws ConfigException If a factory function isn't registered for $name
* @throws UnexpectedValueException If the factory function returns a non-Config object
* @return Config
*/
public function makeConfig( $name ) {
if ( !isset( $this->configs[$name] ) ) {
if ( !isset( $this->factoryFunctions[$name] ) ) {
throw new ConfigException( "No registered builder available for $name." );
}
$conf = call_user_func( $this->factoryFunctions[$name], $this );
if ( $conf instanceof Config ) {
$this->configs[$name] = $conf;
} else {
throw new UnexpectedValueException( "The builder for $name returned a non-Config object." );
}
}
return $this->configs[$name];
}
}