react-native/packager/react-packager/src/lib/ModuleTransport.js

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */
'use strict';

function ModuleTransport(data) {
  this.name = data.name;

  assertExists(data, 'code');
  this.code = data.code;

  assertExists(data, 'sourceCode');
  this.sourceCode = data.sourceCode;

  assertExists(data, 'sourcePath');
  this.sourcePath = data.sourcePath;

  this.virtual = data.virtual;

  if (this.virtual && data.map) {
    throw new Error('Virtual modules cannot have source maps');
  }

  this.map = data.map;

  Object.freeze(this);
}

module.exports = ModuleTransport;

function assertExists(obj, field) {
  if (obj[field] == null) {
    throw new Error('Modules must have `' + field + '`');
  }
}