<?php

final class Factory {
  private static $objectStore = array();

  public static function get()
  {
    if (!func_num_args())
      throw new Exception('Factory::get called without class name');

    $args = func_get_args();
    $class = array_shift($args);

    $obj = self::getInstance($class, $args);

    if ($obj === false) {
      $reflection = new ReflectionClass($class);
      $obj = $reflection->newInstanceArgs($args);
      self::$objectStore[$class][] = array('args' => $args, 'object' => $obj);
    }

    return $obj;
  }

  private static function getInstance($class, $args)
  {
    if (!array_key_exists($class, self::$objectStore)) return false;

    foreach (self::$objectStore[$class] as $item) {
      if ($item['args'] == $args)
	return $item['object'];
    }

    return false;
  }
}