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<?php
/**
* TActiveControlAdapter and TCallbackPageStateTracker class file.
*
* @author Wei Zhuo <weizhuo[at]gamil[dot]com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2014 PradoSoft
* @license http://www.pradosoft.com/license/
* @package Prado\Web\UI\ActiveControls
*/
namespace Prado\Web\UI\ActiveControls;
/**
* TMapCollectionDiff class.
*
* Calculate the changes to attributes collection.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @package Prado\Web\UI\ActiveControls
* @since 3.1
*/
class TMapCollectionDiff extends TViewStateDiff
{
/**
* @return array updates to the attributes collection.
*/
public function getDifference()
{
if($this->_old===null)
{
return ($this->_new!==null) ? $this->_new->toArray() : $this->_null;
}
else
{
$new = $this->_new->toArray();
$old = $this->_old->toArray();
$diff = array_diff_assoc($new, $old);
return count($diff) > 0 ? $diff : $this->_null;
}
}
}
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