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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to version 1.0 of the Zend Framework
* license, that is bundled with this package in the file LICENSE, and
* is available through the world-wide-web at the following URL:
* http://www.zend.com/license/framework/1_0.txt. If you did not receive
* a copy of the Zend Framework license and are unable to obtain it
* through the world-wide-
web, please send a note to license@zend.com
* so we can mail you a copy immediately.
*
* @package Zend_Service
* @subpackage Amazon
* @copyright Copyright (c) 2005-2006 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://www.zend.com/license/framework/1_0.txt Zend Framework License version 1.0
*/
/**
* @package Zend_Service
* @subpackage Amazon
* @copyright Copyright (c) 2005-2006 Zend Technologies Inc. (http://www.zend.com)
* @license Zend Framework License version 1.0
*/
class Zend_Service_Amazon_ResultSet implements SeekableIterator
{
/**
* @var DomNodeList $_result A DomNodeList of <Item> elements
*/
protected $_results;
/**
* @var DomDocument Amazon Web Service Return Document
*/
protected $_dom;
/**
* @var DOMXpath Xpath Object for $this->_dom
*/
protected $_xpath;
/**
* @var int Current Item
*/
protected $_currentItem = 0;
/**
* Create an instance of Zend_Service_Amazon_ResultSet and create the necessary data objects
*
* @param DOMDocument $dom
*/
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) $result->item(0)->data;
}
/**
* Implement SeekableIterator::current
*
* @return Zend_Service_Amazon_Item
*/
public function current()
{
return new Zend_Service_Amazon_Item($this->_results->item($this->_currentItem));
}
/**
* Implement SeekableIterator::key
*
* @return int
*/
public function key()
{
return $this->_currentItem;
}
/**
* Implement SeekableIterator::next
*/
public function next()
{
$this->_currentItem += 1;
}
/**
* Implement SeekableIterator::rewind
*
* @return boolean
*/
public function rewind()
{
$this->_currentItem = 0;
return true;
}
/**
* Implement SeekableIterator::sek
*
* @param int $item
* @return Zend_Service_Amazon_Item
* @throws Zend_Service_Exception
*/
public function seek($item)
{
if ($this->valid($item)) {
$this->_currentItem = $item;
return $this->current();
} else {
/* @todo Should be an OutOfBoundsException but that was only added in
PHP 5.1 */
throw new Zend_Service_Exception('Item not found');
}
}
/**
* Implement SeekableIterator::valid
*
* @param int $item
* @return boolean
*/
public function valid($item = null)
{
if ($item === null && $this->_currentItem < $this->_results->length) {
return true;
} else if ($item !== null && $item <= $this->_results->length) {
return true;
} else {
return false;
}
}
}