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<?php
/**
* CDefaultValueValidator class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2011 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/

/**
* CDefaultValueValidator sets the attributes with the specified value.
* It does not do validation but rather allows setting a default value at the
* same time validation is performed. Usually this happens when calling either
* <code>$model->validate()</code> or <code>$model->save()</code>.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.validators
*/
class CDefaultValueValidator extends CValidator
{
/**
* @var mixed the default value to be set to the specified attributes.
*/
public $value;
/**
* @var boolean whether to set the default value only when the attribute value is null or empty string.
* Defaults to true. If false, the attribute will always be assigned with the default value,
* even if it is already explicitly assigned a value.
*/
public $setOnEmpty=true;

/**
* Validates the attribute of the object.
* @param CModel $object the object being validated
* @param string $attribute the attribute being validated
*/
protected function validateAttribute($object,$attribute)
{
if(!$this->setOnEmpty)
$object->$attribute=$this->value;
else
{
$value=$object->$attribute;
if($value===null || $value==='')
$object->$attribute=$this->value;
}
}
}
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