wikimedia/mediawiki-core

<?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
 */

namespace MediaWiki\Config;

/**
 * Provides a fallback sequence for Config objects
 *
 * @since 1.24
 */
class MultiConfig implements Config {

    /**
     * Array of Config objects to use
     * Order matters, the Config objects
     * will be checked in order to see
     * whether they have the requested setting
     *
     * @var Config[]
     */
    private $configs;

    /**
     * @param Config[] $configs
     */
    public function __construct( array $configs ) {
        $this->configs = $configs;
    }

    /**
     * @inheritDoc
     */
    public function get( $name ) {
        foreach ( $this->configs as $config ) {
            if ( $config->has( $name ) ) {
                return $config->get( $name );
            }
        }

        throw new ConfigException( __METHOD__ . ": undefined option: '$name'" );
    }

    /**
     * @inheritDoc
     */
    public function has( $name ) {
        foreach ( $this->configs as $config ) {
            if ( $config->has( $name ) ) {
                return true;
            }
        }

        return false;
    }
}

/** @deprecated class alias since 1.41 */
class_alias( MultiConfig::class, 'MultiConfig' );