foam-framework/js/foam/dao/NoSelectAllDAO.js

MVC metaprogramming framework

/**
 * @license
 * Copyright 2015 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: 'NoSelectAllDAO',
  extends: 'foam.dao.ProxyDAO',

  documentation: function() {/*
    A DAO which does nothing on 'select all' but otherwise acts as a ProxyDAO.
    A 'select all' contains no query, limit, or skip.
  */},

  methods: [
    function select(sink, options) {
      if ( options &&
           ( (typeof options.query !== 'undefined' && options.query !== TRUE) ||
            typeof options.limit !== 'undefined' ||
            typeof options.skip !== 'undefined' ) ) {
        return this.delegate.select(sink, options);
      }

      var future = afuture();
      sink && sink.eof && sink.eof();
      future.set(sink);
      return future.get;
    }
  ]
});