AttributesFactory.java 文件源码

public void addGatewaySenderId(String gatewaySenderId) {
  if (this.gatewaySenderIds == null) {
    this.gatewaySenderIds = new CopyOnWriteArraySet<String>();
    this.gatewaySenderIds.add(gatewaySenderId);
  } else {
    synchronized (this.gatewaySenderIds) { // TODO: revisit this
      // synchronization : added as per
      // above code
      if (this.gatewaySenderIds.contains(gatewaySenderId)) {
        throw new IllegalArgumentException(
            LocalizedStrings.AttributesFactory_GATEWAY_SENDER_ID_0_IS_ALREADY_ADDED
                .toLocalizedString(gatewaySenderId));
      }
      this.gatewaySenderIds.add(gatewaySenderId);
    }
  }
  setHasGatewaySenderIds(true);
}