JSON  - AS3

 
 package {
    import flash.text.TextField;
    public class JSONExample extends TextField
    {
        static var nextId = 10000;
        static var revivable_objects:Array = [];
            public var id;

        public function JSONExample(s:String){
            super.text = s;
            id = ++nextId;
        }
        public function toJSON(k):*
        {
            // To be called internally by the JSON.stringify() method.
            // Save the original object internally.
            // Write out only a generated ID and the text value.
            revivable_objects[id] = this;
            return {"classJSONExample":{"reviveId":id,"contents":this.text}};
        }
        public static function revive(id:int):JSONExample
        {
            // For explicit use in the JSON.parse() method.
            // Revives the object using the ID obtained from the JSON string.
            return revivable_objects[id];
        }
    }
}

import flash.text.TextField;

var lastId = 20000;
var tf1:TextField = new TextField();
tf1.text = "Lorem ipsum";
var tf2:TextField = new TextField();
tf2.text = "Laughing cows";
var nt:JSONExample = new JSONExample("It was the best of times; it was the worst of times.");

var obj:Object = {a:tf1, b:nt, c:tf2};
var revivable_objects:Array = new Array();

var json_out = JSON.stringify(obj, function(k,v){
        if (v is JSONExample)
        {
            // Send JSONExample objects to the JSON output.
            // Note that stringify() calls JSONExample.toJSON() to serialize this object.
            return v;
        }
        if (v is TextField)
        {
            // Remove TextField objects from the JSON output.
            // Save the original object for reviving later.
            // Return a new object containing an identification marker
            // and the original object's revival ID.
            revivable_objects[++lastId] = v;
            return {"classTextField":{"reviveId":lastId}};
        }
        return v;
    }
);
               
trace("json_out: " + json_out);

var json_in = JSON.parse(json_out, function(k,v) {
        if ("classTextField" in v) { // special marker tag from stringify() replacer code
            // Retrieve the original object based on the ID stored in the stringify() replacer function.
            var id = v["classTextField"].reviveId;
            return revivable_objects[id];
        } else if ("classJSONExample" in v){
            // Retrieve the original object based on the ID generated in JSONExample.toJSON().
            return JSONExample.revive(v["classJSONExample"].reviveId);
        }
        return v;
    }
);

if (json_in.a)
{
    if (json_in.a.hasOwnProperty("text"))
        {
            trace("json_in.a: " + json_in.a.text);
        }
}
if (json_in.b)
{
    if (json_in.b.hasOwnProperty("text"))
        {
            trace("json_in.b: " + json_in.b.text);
        }
}

if (json_in.c)
{
    if (json_in.c.hasOwnProperty("text"))
        {
            trace("json_in.c: " + json_in.c.text);
        }
}