air javascript类扩展-air.urlloader和静态事件

我正在使用多个异步air.urlloader对象,并希望激发的事件能够知道urlloader的“myid”。 我下载的对象本身都有ID,所以我想知道在我的事件侦听器回调函数中,下载ID的进度/完成/错误事件来自哪个函数。

代码:

# loader
addonLoader = new air.URLLoader();
//addonLoader.myId = my_id; <- does not work:
     // error: Failed: Error #1056: Cannot create property my_id on flash.net.URLLoader.
addonLoader.dataFormat = air.URLLoaderDataFormat.BINARY;
addonLoader.addEventListener(air.IOErrorEvent.IO_ERROR, myDownloadListenerError);
addonLoader.addEventListener(air.ProgressEvent.PROGRESS, myDownloadListenerProgress);
addonLoader.addEventListener(air.Event.COMPLETE, myDownloadListenerFinished);
addonLoader.load(addonRequest);

# listener callback
function myDownloadListenerFinished(event)
{
    air.trace('finished: '+event.target.myId);
        // i need the addonLoader.myId here
        // i have access to the caller, but i cannot add my own property/value to it
    air.Introspector.Console.dump(event);
}

每个框架的addEventListener回调函数仅限于事件作为参数。事件也来自空气,我不知道如何改变它们(注入myid,即)。

我还尝试在air.urlloader上使用一个简单的value/getter/setter对象jquery.extend(),但没有成功。

事件转储:

{
  bubbles=false
  bytesLoaded=262144
  bytesTotal=10933705
  cancelable=false
  clone=[function]
    {
      length=0
    }
  currentTarget=[object URLLoader]
    {
      addEventListener=[function]
      bytesLoaded=262144
      bytesTotal=10933705
      close=[function]
      data=undefined
      dataFormat=binary
      dispatchEvent=[function]
      hasEventListener=[function]
      load=[function]
      removeEventListener=[function]
      toString=[function]
      willTrigger=[function]
    }
  eventPhase=2
  formatToString=[function]
    {
      length=1
    }
  isDefaultPrevented=[function]
    {
      length=0
    }
  preventDefault=[function]
    {
      length=0
    }
  stopImmediatePropagation=[function]
    {
      length=0
    }
  stopPropagation=[function]
    {
      length=0
    }
  target=[object URLLoader]
    {
      addEventListener=[function]
      bytesLoaded=262144
      bytesTotal=10933705
      close=[function]
      data=undefined
      dataFormat=binary
      dispatchEvent=[function]
      hasEventListener=[function]
      load=[function]
      removeEventListener=[function]
      toString=[function]
      willTrigger=[function]
    }
  toString=[function]
    {
      length=0
    }
  type=progress
}