MapClassLoader.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Symfony\Component\ClassLoader;


/**
 * A class loader that uses a mapping file to look up paths.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class MapClassLoader {
  private $map = array();

  /**
   * Constructor.
   *
   * @param array $map A map where keys are classes and values the absolute file path
   */
  public function __construct(array $map) {
    $this->map = $map;
  }

  /**
   * Registers this instance as an autoloader.
   *
   * @param Boolean $prepend Whether to prepend the autoloader or not
   */
  public function register($prepend = false) {
    spl_autoload_register(array(
      $this,
      'loadClass',
    ), true, $prepend);
  }

  /**
   * Loads the given class or interface.
   *
   * @param string $class The name of the class
   */
  public function loadClass($class) {
    if ('\\' === $class[0]) {
      $class = substr($class, 1);
    }
    if (isset($this->map[$class])) {
      require $this->map[$class];
    }
  }

  /**
   * Finds the path to the file where the class is defined.
   *
   * @param string $class The name of the class
   *
   * @return string|null The path, if found
   */
  public function findFile($class) {
    if ('\\' === $class[0]) {
      $class = substr($class, 1);
    }
    if (isset($this->map[$class])) {
      return $this->map[$class];
    }
  }

}