ActionScript 3 loading external swf cast problem

Question

I had a problem trying to load external classes in ActionScript 3.0. I believe this is a problem with my understanding of the ApplicationDomain / LoaderContext classes, but even after looking at the documentation and a few web searches, I'm still stuck.

Essentially, I want to load swf, which contains a character, which is an implementation of an interface shared by calling swf and loaded swf. I can load swf fine and create instances and execute methods on it, but only until I try to pass it into a common interface type. If I try to execute it, I get TypeError: Error # 1034: Type Coercion failed: enter an error.

I suspected that this was due to the fact that when loading a new class, flash recognizes it as a completely different class, therefore an exception. The documentation suggests using the LoaderContext argument, and applicationDomain - ApplicationDomain.currentDomain.

The problem is that this has no effect. Regardless of whether I set ApplicationDomain to currentDomain, null or a child of the current domain, I still get a forced type error. It seems that the :: error part indicates that the class I loaded is in a different namespace or in some such cases when I want it to be in the same namespace as my loader.

The code:

import flash.display.Loader;
import flash.display.MovieClip;
import flash.events.Event;
import flash.net.URLRequest;
import flash.system.ApplicationDomain;
import flash.system.LoaderContext;

public class TestSkin extends MovieClip
{
    var mLoader:Loader;

    public function TestSkin()
    {
        super();
        startLoad("ExternalTest.swf");
    }

    private function startLoad(url:String):void
    {
        mLoader = new Loader();
        var mRequest:URLRequest = new URLRequest(url);
        var appDomain:ApplicationDomain = ApplicationDomain.currentDomain;
                    //Loading into different domains seems to have no effect
        //var appDomain:ApplicationDomain = new ApplicationDomain(ApplicationDomain.currentDomain);
        //var appDomain:ApplicationDomain = null;
        mLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, onCompleteHandler);
        mLoader.load(mRequest, new LoaderContext(false, appDomain));
    }

    private function onCompleteHandler(loadEvent:Event):void
    {
        //Get the object from the loadEvent
        var obj:Object = loadEvent.target.content;
        //Verify that the methods exist on the object
        trace("Loaded item id: " + obj.getInterfaceId());
                    //This returns Loaded item id: ExternalTestInterfaceImplementation!
        //Try assigning as an instance of the shared type - fails with type coercion error
                    //Throws the following type error:
                    //TypeError: Error #1034: Type Coercion failed: cannot convert myPackage::ExternalTestInterfaceImplementation@257b56a1 to myPackage.TestInterface.
        var castItem:TestInterface = TestInterface(obj);
        trace("castItem: " + castItem);
    }
}

Interface declaration:

public interface TestInterface 
{
    function getInterfaceId():String;
}

Interface execution

public class ExternalTestInterfaceImplementation extends MovieClip implements TestInterface 
{
    public function getInterfaceId() : String
    {
        return "ExternalTestInterfaceImplementation!";
    }

    public override function toString():String
    {
        return getInterfaceId();    
    }
}

Answer 1

, ​​. . :

https://bugs.adobe.com/jira/browse/ASC-3529

, swf URLLoader ( ), Loader::loadBytes ( Loader).

, :

http://blog.aleksandarandreev.com/?p=42