Flex - Cross domain objects

Question

I have an object being passed between flash and flex using the a custom event. I am importing a library in flex containing a copy of the object's class. The classes are identical, but when I attempt to access the object in flex I get this error:

TypeError: Error #1034: Type Coercion failed: cannot convert com.cackleberries.data.api::ApiObject$ to com.cackleberries.data.api.ApiObject.

Any ideas?

This function is passed into flash as a callback from AIR / flex

public function airEventHandler(type:String, data:Object):void
{
    switch(type)
    {
            case "air_api_call":
                if(data)
                {
                    if(data.hasOwnProperty("apiObject"))
                    {
                        trace("got air api call event in application");
                        serverApi.makeApiCall(ApiObject(data.apiObject));
                    }
                }
                break;
    }
}

I am getting the error when I pass the ApiObject to serverApi.makeApiCall. That function takes an ApiObject as its parameter. Initially, the data object is created with with the apiObject key with a ApiObject as the value (done in flash).

What method of passing the data are you using. Show some code. — The_asMan
Now show the code where you are assigning data.apiObject = ???? — The_asMan

Creynders Creynders · Accepted Answer · 2011-09-14T10:02:29

The problem's not with serverApi.makeApiCall, but with the cast of data.apiObject to ApiObject.

The reason you're getting this error is because data.apiObject is of the type ApiObject included in the flash app, while the flex app is using ApiObject as included into itself. Even though the source files are identical, to the player they apparently are not. I think this is because the flex compiler doesn't compile in exactly the same way as the flash compiler, but I'm not 100% on that.

Anyway, to solve this you should use interfaces. Let ApiObject implement an IApiObject interface with all the necessary methods (ie. the methods the flex app will need) defined in it and then on the flex side cast data.apiObject to IApiObject instead of ApiObject.

Flex - Cross domain objects

1 Answers