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<?php
/**
 * CUserIdentity class file
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright 2008-2013 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

/**
 * CUserIdentity is a base class for representing identities that are authenticated based on a username and a password.
 *
 * Derived classes should implement {@link authenticate} with the actual
 * authentication scheme (e.g. checking username and password against a DB table).
 *
 * By default, CUserIdentity assumes the {@link username} is a unique identifier
 * and thus use it as the {@link id ID} of the identity.
 *
 * @property string $id The unique identifier for the identity.
 * @property string $name The display name for the identity.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @package system.web.auth
 * @since 1.0
 */
class CUserIdentity extends CBaseUserIdentity
{
	/**
	 * @var string username
	 */
	public $username;
	/**
	 * @var string password
	 */
	public $password;

/**
	 * Constructor.
	 * @param string $username username
	 * @param string $password password
	 */
	public function __construct($username,$password)
	{
		$this->username=$username;
		$this->password=$password;
	}

/**
	 * Authenticates a user based on {@link username} and {@link password}.
	 * Derived classes should override this method, or an exception will be thrown.
	 * This method is required by {@link IUserIdentity}.
	 * @return boolean whether authentication succeeds.
	 * @throws CException
	 */
	public function authenticate()
	{
		throw new CException(Yii::t('yii','{class}::authenticate() must be implemented.',array('{class}'=>get_class($this))));
	}

/**
	 * Returns the unique identifier for the identity.
	 * The default implementation simply returns {@link username}.
	 * This method is required by {@link IUserIdentity}.
	 * @return string the unique identifier for the identity.
	 */
	public function getId()
	{
		return $this->username;
	}

/**
	 * Returns the display name for the identity.
	 * The default implementation simply returns {@link username}.
	 * This method is required by {@link IUserIdentity}.
	 * @return string the display name for the identity.
	 */
	public function getName()
	{
		return $this->username;
	}
}