1<?php
2
3/*
4 * This file is part of SwiftMailer.
5 * (c) 2004-2009 Chris Corbyn
6 *
7 * For the full copyright and license information, please view the LICENSE
8 * file that was distributed with this source code.
9 */
10
11/**
12 * A null KeyCache that does not cache at all.
13 *
14 * @author Chris Corbyn
15 */
16class Swift_KeyCache_NullKeyCache implements Swift_KeyCache
17{
18    /**
19     * Set a string into the cache under $itemKey for the namespace $nsKey.
20     *
21     * @see MODE_WRITE, MODE_APPEND
22     *
23     * @param string $nsKey
24     * @param string $itemKey
25     * @param string $string
26     * @param int    $mode
27     */
28    public function setString($nsKey, $itemKey, $string, $mode)
29    {
30    }
31
32    /**
33     * Set a ByteStream into the cache under $itemKey for the namespace $nsKey.
34     *
35     * @see MODE_WRITE, MODE_APPEND
36     *
37     * @param string $nsKey
38     * @param string $itemKey
39     * @param int    $mode
40     */
41    public function importFromByteStream($nsKey, $itemKey, Swift_OutputByteStream $os, $mode)
42    {
43    }
44
45    /**
46     * Provides a ByteStream which when written to, writes data to $itemKey.
47     *
48     * NOTE: The stream will always write in append mode.
49     *
50     * @param string $nsKey
51     * @param string $itemKey
52     *
53     * @return Swift_InputByteStream
54     */
55    public function getInputByteStream($nsKey, $itemKey, Swift_InputByteStream $writeThrough = null)
56    {
57    }
58
59    /**
60     * Get data back out of the cache as a string.
61     *
62     * @param string $nsKey
63     * @param string $itemKey
64     *
65     * @return string
66     */
67    public function getString($nsKey, $itemKey)
68    {
69    }
70
71    /**
72     * Get data back out of the cache as a ByteStream.
73     *
74     * @param string                $nsKey
75     * @param string                $itemKey
76     * @param Swift_InputByteStream $is      to write the data to
77     */
78    public function exportToByteStream($nsKey, $itemKey, Swift_InputByteStream $is)
79    {
80    }
81
82    /**
83     * Check if the given $itemKey exists in the namespace $nsKey.
84     *
85     * @param string $nsKey
86     * @param string $itemKey
87     *
88     * @return bool
89     */
90    public function hasKey($nsKey, $itemKey)
91    {
92        return false;
93    }
94
95    /**
96     * Clear data for $itemKey in the namespace $nsKey if it exists.
97     *
98     * @param string $nsKey
99     * @param string $itemKey
100     */
101    public function clearKey($nsKey, $itemKey)
102    {
103    }
104
105    /**
106     * Clear all data in the namespace $nsKey if it exists.
107     *
108     * @param string $nsKey
109     */
110    public function clearAll($nsKey)
111    {
112    }
113}
114