text: <?php
  /*
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * This software consists of voluntary contributions made by many individuals
   * and is licensed under the MIT license. For more information, see
   * <http://www.doctrine-project.org>.
   */
  
  namespace Doctrine\Common\Cache;
  
  /**
   * Array cache driver.
   *
   * @link   www.doctrine-project.org
   * @since  2.0
   * @author Benjamin Eberlei <kontakt@beberlei.de>
   * @author Guilherme Blanco <guilhermeblanco@hotmail.com>
   * @author Jonathan Wage <jonwage@gmail.com>
   * @author Roman Borschel <roman@code-factory.org>
   * @author David Abdemoulaie <dave@hobodave.com>
   */
  class ArrayCache extends CacheProvider
  {
      /**
       * @var array $data
       */
      private $data = array();
  
      /**
       * {@inheritdoc}
       */
      protected function doFetch($id)
      {
          return $this->doContains($id) ? $this->data[$id] : false;
      }
  
      /**
       * {@inheritdoc}
       */
      protected function doContains($id)
      {
          return isset($this->data[$id]) || array_key_exists($id, $this->data);
      }
  
      /**
       * {@inheritdoc}
       */
      protected function doSave($id, $data, $lifeTime = 0)
      {
          $this->data[$id] = $data;
  
          return true;
      }
  
      /**
       * {@inheritdoc}
       */
      protected function doDelete($id)
      {
          unset($this->data[$id]);
  
          return true;
      }
  
      /**
       * {@inheritdoc}
       */
      protected function doFlush()
      {
          $this->data = array();
  
          return true;
      }
  
      /**
       * {@inheritdoc}
       */
      protected function doGetStats()
      {
          return null;
      }
  }
  