gecko/services/sync/modules/stores.js

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Bookmarks Sync.
 *
 * The Initial Developer of the Original Code is Mozilla.
 * Portions created by the Initial Developer are Copyright (C) 2007
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *  Dan Mills <thunder@mozilla.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

const EXPORTED_SYMBOLS = ["Store"];

const Cc = Components.classes;
const Ci = Components.interfaces;
const Cr = Components.results;
const Cu = Components.utils;

Cu.import("resource://services-sync/constants.js");
Cu.import("resource://services-sync/log4moz.js");
Cu.import("resource://services-sync/util.js");

/*
 * Data Stores
 * These can wrap, serialize items and apply commands
 */

function Store(name) {
  name = name || "Unnamed";
  this.name = name.toLowerCase();

  this._log = Log4Moz.repository.getLogger("Store." + name);
  let level = Svc.Prefs.get("log.logger.engine." + this.name, "Debug");
  this._log.level = Log4Moz.Level[level];
}
Store.prototype = {
  applyIncoming: function Store_applyIncoming(record) {
    if (record.deleted)
      this.remove(record);
    else if (!this.itemExists(record.id))
      this.create(record);
    else
      this.update(record);
  },

  // override these in derived objects

  create: function Store_create(record) {
    throw "override create in a subclass";
  },

  remove: function Store_remove(record) {
    throw "override remove in a subclass";
  },

  update: function Store_update(record) {
    throw "override update in a subclass";
  },

  itemExists: function Store_itemExists(id) {
    throw "override itemExists in a subclass";
  },

  createRecord: function Store_createRecord(id, collection) {
    throw "override createRecord in a subclass";
  },

  changeItemID: function Store_changeItemID(oldID, newID) {
    throw "override changeItemID in a subclass";
  },

  getAllIDs: function Store_getAllIDs() {
    throw "override getAllIDs in a subclass";
  },

  wipe: function Store_wipe() {
    throw "override wipe in a subclass";
  }
};