<?php/** * Swift Mailer Joint Output stream to chain multiple output streams together * Please read the LICENSE file * @author Chris Corbyn <chris@w3style.co.uk> * @package Swift_Cache * @license GNU Lesser General Public License */require_once dirname(__FILE__) . "/../ClassLoader.php";Swift_ClassLoader::load("Swift_Cache_OutputStream");/** * Makes multiple output streams act as one super sream * @package Swift_Cache * @author Chris Corbyn <chris@w3style.co.uk> */class Swift_Cache_JointOutputStream extends Swift_Cache_OutputStream{  /**   * The streams to join   * @var array   */  protected $streams = array();  /**   * The current stream in use   * @var int   */  protected $pointer = 0;    /**   * Ctor   * @param array An array of Swift_Cache_OutputStream instances   */  public function __construct($streams=array())  {    $this->streams = $streams;  }  /**   * Add a new output stream   * @param Swift_Cache_OutputStream   */  public function addStream(Swift_Cache_OutputStream $stream)  {    $this->streams[] = $stream;  }  /**   * Read data from all streams as if they are one stream   * @param int The number of bytes to read from each stream   * @return string   */  public function read($size=null)  {    $ret = $this->streams[$this->pointer]->read($size);    if ($ret !== false)    {      return $ret;    }    else    {      if (isset($this->streams[($this->pointer+1)]))      {        $this->pointer++;        return $this->read($size);      }      else      {        $this->pointer = 0;        return false;      }    }  }}