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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Http
* @subpackage UserAgent
* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* @category Zend
* @package Zend_Http
* @subpackage UserAgent
* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
interface Zend_Http_UserAgent_Storage
{
/**
* Returns true if and only if storage is empty
*
* @throws Zend_Http_UserAgent_Storage_Exception If it is impossible to determine whether storage is empty
* @return boolean
*/
public function isEmpty();
/**
* Returns the contents of storage associated to the key parameter
*
* Behavior is undefined when storage is empty.
*
* @throws Zend_Http_UserAgent_Storage_Exception If reading contents from storage is impossible
* @return mixed
*/
public function read();
/**
* Writes $contents associated to the key parameter to storage
*
* @param mixed $contents
* @throws Zend_Http_UserAgent_Storage_Exception If writing $contents to storage is impossible
* @return void
*/
public function write($contents);
/**
* Clears contents from storage
*
* @throws Zend_Http_UserAgent_Storage_Exception If clearing contents from storage is impossible
* @return void
*/
public function clear();
}
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