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<?php
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/**
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* TPageStatePersister class file
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @link http://www.pradosoft.com/
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* @copyright Copyright © 2005-2008 PradoSoft
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* @license http://www.pradosoft.com/license/
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* @version $Id: TPageStatePersister.php 2541 2008-10-21 15:05:13Z qiang.xue $
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* @package System.Web.UI
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*/
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/**
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* TPageStatePersister class
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*
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* TPageStatePersister implements a page state persistent method based on
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* form hidden fields.
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*
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* Since page state can be very big for complex pages, consider using
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* alternative persisters, such as {@link TSessionPageStatePersister},
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* which store page state on the server side and thus reduce the network
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* traffic for transmitting bulky page state.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @version $Id: TPageStatePersister.php 2541 2008-10-21 15:05:13Z qiang.xue $
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* @package System.Web.UI
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* @since 3.0
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*/
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class TPageStatePersister extends TComponent implements IPageStatePersister
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{
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private $_page;
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/**
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* @return TPage the page that this persister works for
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*/
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public function getPage()
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{
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return $this->_page;
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}
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/**
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* @param TPage the page that this persister works for
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*/
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public function setPage(TPage $page)
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{
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$this->_page=$page;
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}
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/**
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* Saves state in hidden fields.
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* @param mixed state to be stored
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*/
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public function save($state)
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{
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$this->_page->setClientState(TPageStateFormatter::serialize($this->_page,$state));
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}
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/**
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* Loads page state from hidden fields.
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* @return mixed the restored state
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* @throws THttpException if page state is corrupted
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*/
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public function load()
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{
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if(($data=TPageStateFormatter::unserialize($this->_page,$this->_page->getRequestClientState()))!==null)
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return $data;
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else
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throw new THttpException(400,'pagestatepersister_pagestate_corrupted');
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}
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}
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