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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_Queue
* @subpackage Message
* @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: Iterator.php 18951 2009-11-12 16:26:19Z alexander $
*/
/**
* @category Zend
* @package Zend_Queue
* @subpackage Message
* @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_Queue_Message_Iterator implements Iterator, Countable
{
/**
* The data for the queue message
*
* @var array
*/
protected $_data = array();
/**
* Connected is true if we have a reference to a live
* Zend_Queue_Adapter_AdapterInterface object.
* This is false after the Message has been deserialized.
*
* @var boolean
*/
protected $_connected = true;
/**
* Zend_Queue_Adapter_AdapterInterface parent class or instance
*
* @var Zend_Queue_Adapter_AdapterInterface
*/
protected $_queue = null;
/**
* Name of the class of the Zend_Queue_Adapter_AdapterInterface object.
*
* @var string
*/
protected $_queueClass = null;
/**
* Zend_Queue_Message class name
*
* @var string
*/
protected $_messageClass = 'Zend_Queue_Message';
/**
* Iterator pointer.
*
* @var integer
*/
protected $_pointer = 0;
/**
* Constructor
*
* @param array $options ('queue', 'messageClass', 'data'=>array());
* @return void
*/
public function __construct(array $options = array())
{
if (isset($options['queue'])) {
$this->_queue = $options['queue'];
$this->_queueClass = get_class($this->_queue);
$this->_connected = true;
} else {
$this->_connected = false;
}
if (isset($options['messageClass'])) {
$this->_messageClass = $options['messageClass'];
}
if (!is_array($options['data'])) {
require_once 'Zend/Queue/Exception.php';
throw new Zend_Queue_Exception('array optionsuration must have $options[\'data\'] = array');
}
// load the message class
$classname = $this->_messageClass;
if (!class_exists($classname)) {
require_once 'Zend/Loader.php';
Zend_Loader::loadClass($classname);
}
// for each of the messages
foreach ($options['data'] as $data) {
// construct the message parameters
$message = array('data' => $data);
// If queue has not been set, then use the default.
if (empty($message['queue'])) {
$message['queue'] = $this->_queue;
}
// construct the message and add it to _data[];
$this->_data[] = new $classname($message);
}
}
/**
* Store queue and data in serialized object
*
* @return array
*/
public function __sleep()
{
return array('_data', '_queueClass', '_messageClass', '_pointer');
}
/**
* Setup to do on wakeup.
* A de-serialized Message should not be assumed to have access to a live
* queue connection, so set _connected = false.
*
* @return void
*/
public function __wakeup()
{
$this->_connected = false;
}
/**
* Returns all data as an array.
*
* Used for debugging.
*
* @return array
*/
public function toArray()
{
// @todo This works only if we have iterated through
// the result set once to instantiate the messages.
foreach ($this->_data as $i => $message) {
$this->_data[$i] = $message->toArray();
}
return $this->_data;
}
/**
* Returns the queue object, or null if this is disconnected message set
*
* @return Zend_Queue|null
*/
public function getQueue()
{
return $this->_queue;
}
/**
* Set the queue object, to re-establish a live connection
* to the queue for a Message that has been de-serialized.
*
* @param Zend_Queue_Adapter_AdapterInterface $queue
* @return boolean
* @throws Zend_Queue_Exception
*/
public function setQueue(Zend_Queue $queue)
{
$this->_queue = $queue;
$this->_connected = false;
// @todo This works only if we have iterated through
// the result set once to instantiate the rows.
foreach ($this->_data as $i => $message) {
$this->_connected = $this->_connected || $message->setQueue($queue);
}
return $this->_connected;
}
/**
* Query the class name of the Queue object for which this
* Message was created.
*
* @return string
*/
public function getQueueClass()
{
return $this->_queueClass;
}
/*
* Iterator implementation
*/
/**
* Rewind the Iterator to the first element.
* Similar to the reset() function for arrays in PHP.
* Required by interface Iterator.
*
* @return void
*/
public function rewind()
{
$this->_pointer = 0;
}
/**
* Return the current element.
* Similar to the current() function for arrays in PHP
* Required by interface Iterator.
*
* @return Zend_Queue_Message current element from the collection
*/
public function current()
{
return (($this->valid() === false)
? null
: $this->_data[$this->_pointer]); // return the messages object
}
/**
* Return the identifying key of the current element.
* Similar to the key() function for arrays in PHP.
* Required by interface Iterator.
*
* @return integer
*/
public function key()
{
return $this->_pointer;
}
/**
* Move forward to next element.
* Similar to the next() function for arrays in PHP.
* Required by interface Iterator.
*
* @return void
*/
public function next()
{
++$this->_pointer;
}
/**
* Check if there is a current element after calls to rewind() or next().
* Used to check if we've iterated to the end of the collection.
* Required by interface Iterator.
*
* @return bool False if there's nothing more to iterate over
*/
public function valid()
{
return $this->_pointer < count($this);
}
/*
* Countable Implementation
*/
/**
* Returns the number of elements in the collection.
*
* Implements Countable::count()
*
* @return integer
*/
public function count()
{
return count($this->_data);
}
}
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