MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / includes / config / MultiConfig.php

diff --git a/includes/config/MultiConfig.php b/includes/config/MultiConfig.php
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+++ b/includes/config/MultiConfig.php
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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
+ */
+
+/**
+ * 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;
+       }
+}