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KeyCache.php
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<?php /* * This file is part of SwiftMailer. * (c) 2004-2009 Chris Corbyn * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ /** * Provides a mechanism for storing data using two keys. * * @author Chris Corbyn */ interface Swift_KeyCache { /** Mode for replacing existing cached data */ const MODE_WRITE = 1; /** Mode for appending data to the end of existing cached data */ const MODE_APPEND = 2; /** * Set a string into the cache under $itemKey for the namespace $nsKey. * * @see MODE_WRITE, MODE_APPEND * * @param string $nsKey * @param string $itemKey * @param string $string * @param int $mode */ public function setString($nsKey, $itemKey, $string, $mode); /** * Set a ByteStream into the cache under $itemKey for the namespace $nsKey. * * @see MODE_WRITE, MODE_APPEND * * @param string $nsKey * @param string $itemKey * @param Swift_OutputByteStream $os * @param int $mode */ public function importFromByteStream($nsKey, $itemKey, Swift_OutputByteStream $os, $mode); /** * Provides a ByteStream which when written to, writes data to $itemKey. * * NOTE: The stream will always write in append mode. * If the optional third parameter is passed all writes will go through $is. * * @param string $nsKey * @param string $itemKey * @param Swift_InputByteStream $is optional input stream * * @return Swift_InputByteStream */ public function getInputByteStream($nsKey, $itemKey, Swift_InputByteStream $is = null); /** * Get data back out of the cache as a string. * * @param string $nsKey * @param string $itemKey * * @return string */ public function getString($nsKey, $itemKey); /** * Get data back out of the cache as a ByteStream. * * @param string $nsKey * @param string $itemKey * @param Swift_InputByteStream $is stream to write the data to */ public function exportToByteStream($nsKey, $itemKey, Swift_InputByteStream $is); /** * Check if the given $itemKey exists in the namespace $nsKey. * * @param string $nsKey * @param string $itemKey * * @return bool */ public function hasKey($nsKey, $itemKey); /** * Clear data for $itemKey in the namespace $nsKey if it exists. * * @param string $nsKey * @param string $itemKey */ public function clearKey($nsKey, $itemKey); /** * Clear all data in the namespace $nsKey if it exists. * * @param string $nsKey */ public function clearAll($nsKey); }
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