libs/Yii/web/auth/CBaseUserIdentity.php

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<?php
/**
 * CBaseUserIdentity 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/
 */

/**
 * CBaseUserIdentity is a base class implementing {@link IUserIdentity}.
 *
 * CBaseUserIdentity implements the scheme for representing identity
 * information that needs to be persisted. It also provides the way
 * to represent the authentication errors.
 *
 * Derived classes should implement {@link IUserIdentity::authenticate}
 * and {@link IUserIdentity::getId} that are required by the {@link IUserIdentity}
 * interface.
 *
 * @property mixed $id A value that uniquely represents the identity (e.g. primary key value).
 * The default implementation simply returns {@link name}.
 * @property string $name The display name for the identity.
 * The default implementation simply returns empty string.
 * @property array $persistentStates The identity states that should be persisted.
 * @property whether $isAuthenticated The authentication is successful.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id$
 * @package system.web.auth
 * @since 1.0
 */
abstract class CBaseUserIdentity extends CComponent implements IUserIdentity
{
	const ERROR_NONE=0;
	const ERROR_USERNAME_INVALID=1;
	const ERROR_PASSWORD_INVALID=2;
	const ERROR_UNKNOWN_IDENTITY=100;

	/**
	 * @var integer the authentication error code. If there is an error, the error code will be non-zero.
	 * Defaults to 100, meaning unknown identity. Calling {@link authenticate} will change this value.
	 */
	public $errorCode=self::ERROR_UNKNOWN_IDENTITY;
	/**
	 * @var string the authentication error message. Defaults to empty.
	 */
	public $errorMessage='';

	private $_state=array();

	/**
	 * Returns a value that uniquely represents the identity.
	 * @return mixed a value that uniquely represents the identity (e.g. primary key value).
	 * The default implementation simply returns {@link name}.
	 */
	public function getId()
	{
		return $this->getName();