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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
  * @subpackage Ebay
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id: Abstract.php 20166 2010-01-09 19:00:17Z bkarwin $
  */
 
 /**
  * @category   Zend
  * @package    Zend_Service
  * @subpackage Ebay
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 abstract class Zend_Service_Ebay_Finding_Set_Abstract implements SeekableIterator, Countable
 {
     /**
      * @var DOMNodeList
      */
     protected $_nodes;
 
     /**
      * @var integer
      */
     protected $_key = 0;
 
     /**
      * @param  DOMNodeList $nodes
      * @return void
      */
     public function __construct(DOMNodeList $nodes)
     {
         $this->_nodes = $nodes;
         $this->_init();
     }
 
     /**
      * Initialize object.
      *
      * Called from {@link __construct()} as final step of object initialization.
      *
      * @return void
      */
     protected function _init()
     {
     }
 
     /**
      * Implement SeekableIterator::seek()
      *
      * @param  integer $key
      * @throws OutOfBoundsException When $key is not seekable
      * @return void
      */
     public function seek($key)
     {
         if ($key < 0 || $key >= $this->count()) {
             $message = "Position '{$key}' is not seekable.";
             throw new OutOfBoundsException($message);
         }
         $this->_key = $key;
     }
 
     /**
      * Implement Iterator::key()
      *
      * @return integer
      */
     public function key()
     {
         return $this->_key;
     }
 
     /**
      * Implement Iterator::next()
      *
      * @return void
      */
     public function next()
     {
         $this->_key++;
     }
 
     /**
      * Implement Iterator::rewind()
      *
      * @return void
      */
     public function rewind()
     {
         $this->_key = 0;
     }
 
     /**
      * Implement Iterator::valid()
      *
      * @return boolean
      */
     public function valid()
     {
         return $this->_key >= 0 && $this->_key < $this->count();
     }
 
     /**
      * Implement Countable::current()
      *
      * @return integer
      */
     public function count()
     {
         return $this->_nodes ? $this->_nodes->length : 0;
     }
 }