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   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  }