react-native/Libraries/EventEmitter/MissingNativeEventEmitterSh...

55 lines
1.6 KiB
JavaScript

/**
* 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.
*
* @providesModule MissingNativeEventEmitterShim
* @flow
*/
'use strict';
const EmitterSubscription = require('EmitterSubscription');
const EventEmitter = require('EventEmitter');
const invariant = require('fbjs/lib/invariant');
class MissingNativeEventEmitterShim extends EventEmitter {
isAvailable: boolean = false;
_nativeModuleName: string;
_nativeEventEmitterName: string;
constructor(nativeModuleName: string, nativeEventEmitterName: string) {
super(null);
this._nativeModuleName = nativeModuleName;
this._nativeEventEmitterName = nativeEventEmitterName;
}
throwMissingNativeModule() {
invariant(
false,
`Cannot use '${this._nativeEventEmitterName}' module when ` +
`native '${this._nativeModuleName}' is not included in the build. ` +
`Either include it, or check '${this._nativeEventEmitterName}'.isAvailable ` +
'before calling any methods.'
);
}
// EventEmitter
addListener(eventType: string, listener: Function, context: ?Object): EmitterSubscription {
this.throwMissingNativeModule();
}
removeAllListeners(eventType: string) {
this.throwMissingNativeModule();
}
removeSubscription(subscription: EmitterSubscription) {
this.throwMissingNativeModule();
}
}
module.exports = MissingNativeEventEmitterShim;