libs/Yii/validators/CBooleanValidator.php

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<?php
/**
 * CBooleanValidator 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/
 */

/**
 * CBooleanValidator validates that the attribute value is either {@link trueValue}  or {@link falseValue}.
 *
 * When using the {@link message} property to define a custom error message, the message
 * may contain additional placeholders that will be replaced with the actual content. In addition
 * to the "{attribute}" placeholder, recognized by all validators (see {@link CValidator}),
 * CBooleanValidator allows for the following placeholders to be specified:
 * <ul>
 * <li>{true}: replaced with value representing the true status {@link trueValue}.</li>
 * <li>{false}: replaced with value representing the false status {@link falseValue}.</li>
 * </ul>
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id$
 * @package system.validators
 */
class CBooleanValidator extends CValidator
{
	/**
	 * @var mixed the value representing true status. Defaults to '1'.
	 */
	public $trueValue='1';
	/**
	 * @var mixed the value representing false status. Defaults to '0'.
	 */
	public $falseValue='0';
	/**
	 * @var boolean whether the comparison to {@link trueValue} and {@link falseValue} is strict.
	 * When this is true, the attribute value and type must both match those of {@link trueValue} or {@link falseValue}.
	 * Defaults to false, meaning only the value needs to be matched.
	 */
	public $strict=false;
	/**
	 * @var boolean whether the attribute value can be null or empty. Defaults to true,
	 * meaning that if the attribute is empty, it is considered valid.
	 */
	public $allowEmpty=true;

	/**
	 * Validates the attribute of the object.
	 * If there is any error, the error message is added to the object.
	 * @param CModel $object the object being validated
	 * @param string $attribute the attribute being validated
	 */
	protected function validateAttribute($object,$attribute)
	{
		$value=$object->$attribute;
		if($this->allowEmpty && $this->isEmpty($value))
			return;
		if(!$this->strict && $value!=$this->trueValue && $value!=$this->falseValue
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