如何在AS3中获取类的别名字符串？

Question

var alias:String = 'models.User';
registerClassAlias(alias, models.User);

// If I have the alias, then
// I can get the class like this:
var klass:Class = flash.net.getClassByAlias(alias);

// How do I do the reverse
// (get the alias from the class)?
//
// I want to do this, but I can't find a 
// 'getAliasByClass' function.
alias = getAliasByClass(klass);

Answer 1

看看flash.utils.describeType（）

Answer 2

getQualifiedClassName should do the trick.

alias = flash.utils.getQualifiedClassName( klass );
// should return: "models::User"

You can pass it a class reference, or an instance of the class, either way.

Answer 3

As stated above you can call flash.utils.describeType() and use "reflection" on your Actionscript object's class to query attributes, properties, methods of the object.

For example the following code snippet for ObjectCodec.as seems to retrieve the alias attribute by using "@":

override protected function encodeComplex(o:Object, b:IBinary, context:IContext=null):void
{
        var desc:XML = describeType(o);
        var classAlias:String = desc.@alias;
        //...
}