realm-js/lib/browser/objects.js

56 lines
1.8 KiB
JavaScript

////////////////////////////////////////////////////////////////////////////
//
// Copyright 2016 Realm Inc.
//
// 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.
//
////////////////////////////////////////////////////////////////////////////
'use strict';
import { keys } from './constants';
import { getterForProperty, setterForProperty } from './util';
const registeredConstructors = {};
export function create(realmId, info) {
let schema = info.schema;
let constructor = (registeredConstructors[realmId] || {})[schema.name];
let object = constructor ? Object.create(constructor.prototype) : {};
object[keys.realm] = realmId;
object[keys.id] = info.id;
object[keys.type] = info.type;
schema.properties.forEach((name) => {
Object.defineProperty(object, name, {
enumerable: true,
get: getterForProperty(name),
set: setterForProperty(name),
});
});
if (constructor) {
let result = constructor.call(object);
if (result != null && result != object) {
throw new Error('Realm object constructor must not return another value');
}
}
return object;
}
export function registerConstructors(realmId, constructors) {
registeredConstructors[realmId] = constructors;
}