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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 Amazon
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: ResultSet.php 16211 2009-06-21 19:23:55Z thomas $
*/
/**
* @see Zend_Service_Amazon_Item
*/
require_once 'Zend/Service/Amazon/Item.php';
/**
* @category Zend
* @package Zend_Service
* @subpackage Amazon
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Service_Amazon_ResultSet implements SeekableIterator
{
/**
* A DOMNodeList of <Item> elements
*
* @var DOMNodeList
*/
protected $_results = null;
/**
* Amazon Web Service Return Document
*
* @var DOMDocument
*/
protected $_dom;
/**
* XPath Object for $this->_dom
*
* @var DOMXPath
*/
protected $_xpath;
/**
* Current index for SeekableIterator
*
* @var int
*/
protected $_currentIndex = 0;
/**
* Create an instance of Zend_Service_Amazon_ResultSet and create the necessary data objects
*
* @param DOMDocument $dom
* @return void
*/
public function __construct(DOMDocument $dom)
{
$this->_dom = $dom;
$this->_xpath = new DOMXPath($dom);
$this->_xpath->registerNamespace('az', 'http://webservices.amazon.com/AWSECommerceService/2005-10-05');
$this->_results = $this->_xpath->query('//az:Item');
}
/**
* Total Number of results returned
*
* @return int Total number of results returned
*/
public function totalResults()
{
$result = $this->_xpath->query('//az:TotalResults/text()');
return (int) $result->item(0)->data;
}
/**
* Total Number of pages returned
*
* @return int Total number of pages returned
*/
public function totalPages()
{
$result = $this->_xpath->query('//az:TotalPages/text()');
return (int) $result->item(0)->data;
}
/**
* Implement SeekableIterator::current()
*
* @return Zend_Service_Amazon_Item
*/
public function current()
{
return new Zend_Service_Amazon_Item($this->_results->item($this->_currentIndex));
}
/**
* Implement SeekableIterator::key()
*
* @return int
*/
public function key()
{
return $this->_currentIndex;
}
/**
* Implement SeekableIterator::next()
*
* @return void
*/
public function next()
{
$this->_currentIndex += 1;
}
/**
* Implement SeekableIterator::rewind()
*
* @return void
*/
public function rewind()
{
$this->_currentIndex = 0;
}
/**
* Implement SeekableIterator::seek()
*
* @param int $index
* @throws OutOfBoundsException
* @return void
*/
public function seek($index)
{
$indexInt = (int) $index;
if ($indexInt >= 0 && (null === $this->_results || $indexInt < $this->_results->length)) {
$this->_currentIndex = $indexInt;
} else {
throw new OutOfBoundsException("Illegal index '$index'");
}
}
/**
* Implement SeekableIterator::valid()
*
* @return boolean
*/
public function valid()
{
return null !== $this->_results && $this->_currentIndex < $this->_results->length;
}
}
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