Check whether a Movieclip exists in library

Question

I am trying to add sound from library. Like backGroundSound:Sound = new BackGroundSound(); // BackGroundSound is mp3 file class name.

I want to use this as common for all developers who use Backgroundsound for their game.

I want to check before adding it like whether it is exported in library to prevent compilation error.

Please help me to solve this problem.

Answer 1

Try the following:

var classExist:Boolean = isClassExists("BackGroundSound");

private function isClassExists(className:String, domain:ApplicationDomain = null):Boolean
{
    var res:Boolean;

    if(domain)
    {
        res = domain.hasDefinition(className);
    }
    else
    {
        res = getDefinitionByName(className);
        //or the same
        //res = ApplicationDomain.currentDomain.hasDefinition(className);
    }

    return res;
}