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1 | <?php |
2 | /** |
3 | * Efficient concatenated text storage. |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by |
7 | * the Free Software Foundation; either version 2 of the License, or |
8 | * (at your option) any later version. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * GNU General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program; if not, write to the Free Software Foundation, Inc., |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
18 | * http://www.gnu.org/copyleft/gpl.html |
19 | * |
20 | * @file |
21 | */ |
22 | |
23 | /** |
24 | * Base class for general text storage via the "object" flag in old_flags, or |
25 | * two-part external storage URLs. Used for represent efficient concatenated |
26 | * storage, and migration-related pointer objects. |
27 | */ |
28 | interface HistoryBlob { |
29 | /** |
30 | * Adds an item of text, returns a stub object which points to the item. |
31 | * You must call setLocation() on the stub object before storing it to the |
32 | * database |
33 | * |
34 | * @param string $text |
35 | * |
36 | * @return string The key for getItem() |
37 | */ |
38 | public function addItem( $text ); |
39 | |
40 | /** |
41 | * Get item by key, or false if the key is not present |
42 | * |
43 | * @param string $key |
44 | * |
45 | * @return string|bool |
46 | */ |
47 | public function getItem( $key ); |
48 | |
49 | /** |
50 | * Set the "default text" |
51 | * This concept is an odd property of the current DB schema, whereby each text item has a revision |
52 | * associated with it. The default text is the text of the associated revision. There may, however, |
53 | * be other revisions in the same object. |
54 | * |
55 | * Default text is not required for two-part external storage URLs. |
56 | * |
57 | * @param string $text |
58 | */ |
59 | public function setText( $text ); |
60 | |
61 | /** |
62 | * Get default text. |
63 | * |
64 | * @return string|false |
65 | */ |
66 | public function getText(); |
67 | } |