3 * Efficient concatenated text storage.
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.
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.
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
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.
28 interface HistoryBlob
{
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
36 * @return string The key for getItem()
38 function addItem( $text );
41 * Get item by key, or false if the key is not present
47 function getItem( $key );
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.
55 * Default text is not required for two-part external storage URLs.
59 function setText( $text );
62 * Get default text. This is called from Revision::getRevisionText()