<?php
  
  /*
   * This file is part of the Assetic package, an OpenSky project.
   *
   * (c) 2010-2014 OpenSky Project Inc
   *
   * For the full copyright and license information, please view the LICENSE
   * file that was distributed with this source code.
   */
  
  namespace Assetic\Cache;
  
  /**
   * A simple array cache
   *
   * @author Michael Mifsud <xzyfer@gmail.com>
   */
  class ArrayCache implements CacheInterface
  {
      private $cache = array();
  
      /**
       * @see CacheInterface::has()
       */
      public function has($key)
      {
          return isset($this->cache[$key]);
      }
  
      /**
       * @see CacheInterface::get()
       */
      public function get($key)
      {
          if(!$this->has($key)) {
              throw new \RuntimeException('There is no cached value for '.$key);
          }
  
          return $this->cache[$key];
      }
  
      /**
       * @see CacheInterface::set()
       */
      public function set($key, $value)
      {
          $this->cache[$key] = $value;
      }
  
      /**
       * @see CacheInterface::remove()
       */
      public function remove($key)
      {
          unset($this->cache[$key]);
      }
  }