foam-framework/js/foam/dao/NullDAO.js

MVC metaprogramming framework

/**
 * @license
 * Copyright 2014 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

CLASS({
  package: 'foam.dao',
  name: 'NullDAO',
  help: 'A DAO that stores nothing and does nothing.',
  methods: {
    put: function(obj, sink) { sink && sink.put && sink.put(obj); },
    remove: function(obj, sink) { sink && sink.remove && sink.remove(obj); },
    select: function(sink) {
      sink && sink.eof && sink.eof();
      return aconstant(sink || [].sink);
    },
    find: function(q, sink) { sink && sink.error && sink.error('find', q); },
    listen: function() {},
    removeAll: function() {},
    unlisten: function() {},
    pipe: function() {},
    where: function() { return this; },
    limit: function() { return this; },
    skip: function() { return this; },
    orderBy: function() { return this; }
  }
});