javascript - JSON.parse(), reconnecting to nested objects -

i'm having trouble converting json javascript objects when json data has nested objects. top level 'person' object gets recreated fine, 'residence' object property not

function person(first, last) {     this.firstname = first;     this.lastname = last;     this.residence = {}; }  person.revive = function (data) {     return new person(data.firstname, data.lastname); }  object.defineproperty(person.prototype, "fullname", {     get: function() { return this.firstname + " " + this.lastname; } });  person.prototype.tojson = function () {    this.__class__ = "person";     return this; });  function residence(lat, long) {     this.latitude = lat;     this.longitude = long; }  residence.prototype.tojson = function () {     this.__class__ = "residence";     return this; }  residence.revive = function (data) {     return new residence(data.latitude, data.longitude); }  object.defineproperty(residence.prototype, "location", {     get: function () { return this.latitude + ", " + this.longitude; } });  var p = new person("foo", "bar"); p.residence = new residence(44, 33);  console.log("full name = " + p.fullname); console.log("location = " + p.residence.location);  var serialization = json.stringify(p); console.log(serialization);  var rawobj = json.parse(serialization, function (key, value) {     if (value instanceof object && value.__class__ == 'person') {         return person.revive(value);     }     if (value instanceof object && value.__class__ == 'residence') {         return residence.revive(value);     }     return value; }); console.log("full name = " + rawobj.fullname); console.log("location = " + rawobj.residence.location); 

the json.parse function key/value pair 'residence' object, , new residence object created , returned. however, resulting 'rawobj.residence' empty object. can point out i'm doing wrong?

the console output follows:

full name = foo bar location = 44, 33 {"firstname":"foo","lastname":"bar","age":22,"residence":{"latitude":44,"longitude":33,"__class__":"residence"},"__class__":"person"} full name = foo bar location = undefined 

fiddle: http://jsfiddle.net/cadguy/yyq4dqtx/

var p = new person("foo", "bar"); p.residence = new residence(44, 33); 

well, if constructing person objects that, you'll have revive them well:

person.revive = function (data) {     var p = new person(data.firstname, data.lastname);     p.residence = data.residence;     return p; }; 

of course, might idea make residence (optional?) parameter person in first place.