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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Service_Rackspace
  * @subpackage Servers
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 
 // require_once 'Zend/Service/Rackspace/Servers.php';
 // require_once 'Zend/Service/Rackspace/Servers/Server.php';
 
 /**
  * List of servers of Rackspace
  *
  * @uses       ArrayAccess
  * @uses       Countable
  * @uses       Iterator
  * @uses       OutOfBoundsException
  * @uses       Zend_Service_Rackspace_Servers
  * @category   Zend
  * @package    Zend_Service_Rackspace
  * @subpackage Servers
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Service_Rackspace_Servers_ServerList implements Countable, Iterator, ArrayAccess
 {
     /**
      * @var array of Zend_Service_Rackspace_Servers_Server
      */
     protected $servers = array();
     /**
      * @var int Iterator key
      */
     protected $iteratorKey = 0;
     /**
      * @var Zend_Service_Rackspace_Servers
      */
     protected $service;
     /**
      * Construct
      *
      * @param  Zend_Service_Rackspace_Servers $service
      * @param  array $list
      * @return void
      */
     public function __construct($service,$list = array())
     {
         if (!($service instanceof Zend_Service_Rackspace_Servers) || !is_array($list)) {
             // require_once 'Zend/Service/Rackspace/Servers/Exception.php';
             throw new Zend_Service_Rackspace_Servers_Exception("You must pass a Zend_Service_Rackspace_Servers object and an array");
         }
         $this->service= $service;
         $this->constructFromArray($list);
     }
     /**
      * Transforms the array to array of Server
      *
      * @param  array $list
      * @return void
      */
     private function constructFromArray(array $list)
     {
         foreach ($list as $server) {
             $this->addServer(new Zend_Service_Rackspace_Servers_Server($this->service,$server));
         }
     }
     /**
      * Add a server
      *
      * @param  Zend_Service_Rackspace_Servers_Server $server
      * @return Zend_Service_Rackspace_Servers_ServerList
      */
     protected function addServer (Zend_Service_Rackspace_Servers_Server $server)
     {
         $this->servers[] = $server;
         return $this;
     }
     /**
      * To Array
      * 
      * @return array 
      */
     public function toArray()
     {
         $array= array();
         foreach ($this->servers as $server) {
             $array[]= $server->toArray();
         }
         return $array;
     }
     /**
      * Return number of servers
      *
      * Implement Countable::count()
      *
      * @return int
      */
     public function count()
     {
         return count($this->servers);
     }
     /**
      * Return the current element
      *
      * Implement Iterator::current()
      *
      * @return Zend_Service_Rackspace_Servers_Server
      */
     public function current()
     {
         return $this->servers[$this->iteratorKey];
     }
     /**
      * Return the key of the current element
      *
      * Implement Iterator::key()
      *
      * @return int
      */
     public function key()
     {
         return $this->iteratorKey;
     }
     /**
      * Move forward to next element
      *
      * Implement Iterator::next()
      *
      * @return void
      */
     public function next()
     {
         $this->iteratorKey += 1;
     }
     /**
      * Rewind the Iterator to the first element
      *
      * Implement Iterator::rewind()
      *
      * @return void
      */
     public function rewind()
     {
         $this->iteratorKey = 0;
     }
     /**
      * Check if there is a current element after calls to rewind() or next()
      *
      * Implement Iterator::valid()
      *
      * @return bool
      */
     public function valid()
     {
         $numItems = $this->count();
         if ($numItems > 0 && $this->iteratorKey < $numItems) {
             return true;
         } else {
             return false;
         }
     }
     /**
      * Whether the offset exists
      *
      * Implement ArrayAccess::offsetExists()
      *
      * @param   int     $offset
      * @return  bool
      */
     public function offsetExists($offset)
     {
         return ($offset < $this->count());
     }
     /**
      * Return value at given offset
      *
      * Implement ArrayAccess::offsetGet()
      *
      * @param   int     $offset
      * @throws  Zend_Service_Rackspace_Servers_Exception
      * @return  Zend_Service_Rackspace_Servers_Server
      */
     public function offsetGet($offset)
     {
         if ($this->offsetExists($offset)) {
             return $this->servers[$offset];
         } else {
             // require_once 'Zend/Service/Rackspace/Servers/Exception.php';
             throw new Zend_Service_Rackspace_Servers_Exception('Illegal index');
         }
     }
 
     /**
      * Throws exception because all values are read-only
      *
      * Implement ArrayAccess::offsetSet()
      *
      * @param   int     $offset
      * @param   string  $value
      * @throws  Zend_Service_Rackspace_Servers_Exception
      */
     public function offsetSet($offset, $value)
     {
         // require_once 'Zend/Service/Rackspace/Servers/Exception.php';
         throw new Zend_Service_Rackspace_Servers_Exception('You are trying to set read-only property');
     }
 
     /**
      * Throws exception because all values are read-only
      *
      * Implement ArrayAccess::offsetUnset()
      *
      * @param   int     $offset
      * @throws  Zend_Service_Rackspace_Servers_Exception
      */
     public function offsetUnset($offset)
     {
         // require_once 'Zend/Service/Rackspace/Servers/Exception.php';
         throw new Zend_Service_Rackspace_Servers_Exception('You are trying to unset read-only property');
     }
 }