includes/config/MultiConfig.php

   1 <?php
   2 /**
   3  * Copyright 2014
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * Provides a fallback sequence for Config objects
  25  *
  26  * @since 1.24
  27  */
  28 class MultiConfig implements Config {
  29
  30         /**
  31          * Array of Config objects to use
  32          * Order matters, the Config objects
  33          * will be checked in order to see
  34          * whether they have the requested setting
  35          *
  36          * @var Config[]
  37          */
  38         private $configs;
  39
  40         /**
  41          * @param Config[] $configs
  42          */
  43         public function __construct( array $configs ) {
  44                 $this->configs = $configs;
  45         }
  46
  47         /**
  48          * @see Config::get
  49          */
  50         public function get( $name ) {
  51                 foreach ( $this->configs as $config ) {
  52                         if ( $config->has( $name ) ) {
  53                                 return $config->get( $name );
  54                         }
  55                 }
  56
  57                 throw new ConfigException( __METHOD__ . ": undefined option: '$name'" );
  58         }
  59
  60         /**
  61          * @see Config::has
  62          */
  63         public function has( $name ) {
  64                 foreach ( $this->configs as $config ) {
  65                         if ( $config->has( $name ) ) {
  66                                 return true;
  67                         }
  68                 }
  69
  70                 return false;
  71         }
  72 }