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<?php
/**
* TPageStatePersister class file
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link https://github.com/pradosoft/prado
* @copyright Copyright © 2005-2015 The PRADO Group
* @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT
* @package System.Web.UI
*/
/**
* TPageStatePersister class
*
* TPageStatePersister implements a page state persistent method based on
* form hidden fields.
*
* Since page state can be very big for complex pages, consider using
* alternative persisters, such as {@link TSessionPageStatePersister},
* which store page state on the server side and thus reduce the network
* traffic for transmitting bulky page state.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @package System.Web.UI
* @since 3.0
*/
class TPageStatePersister extends TComponent implements IPageStatePersister
{
private $_page;
/**
* @return TPage the page that this persister works for
*/
public function getPage()
{
return $this->_page;
}
/**
* @param TPage the page that this persister works for
*/
public function setPage(TPage $page)
{
$this->_page=$page;
}
/**
* Saves state in hidden fields.
* @param mixed state to be stored
*/
public function save($state)
{
$this->_page->setClientState(TPageStateFormatter::serialize($this->_page,$state));
}
/**
* Loads page state from hidden fields.
* @return mixed the restored state
* @throws THttpException if page state is corrupted
*/
public function load()
{
if(($data=TPageStateFormatter::unserialize($this->_page,$this->_page->getRequestClientState()))!==null)
return $data;
else
throw new THttpException(400,'pagestatepersister_pagestate_corrupted');
}
}
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