java - Prevent GSON from serializing JSON string -

i'm new gson, , have newby question have not found answer to, please bear me. stackoverflow , google not friend :(

i have java class "user", , 1 of properties, "externalprofile" java string containing serialized json. when gson serializes user object, treat externalprofile primitive , escaping json adding slashes etc. want gson leave string alone, using "as is", because valid , usable json.

to distinguish json string, created simple class called jsonstring, , i've tried using reader/writers, registertypeadapter, nothing works. can me out?

public class user {     private jsonstring externalprofile;     public void setexternalprofile(jsonstring externalprofile) { this.externalprofile = externalprofile; }  }  public final class jsonstring {     private string simplestring;     public jsonstring(string simplestring) { this.simplestring = simplestring; } }  public customjsonbuilder(object object) {     gsonbuilder builder = new gsonbuilder();         builder.registertypeadapter(gregoriancalendar.class, new jsonserializer<gregoriancalendar>() {             public jsonelement serialize(gregoriancalendar src, type type, jsonserializationcontext context) {                 if (src == null) {                     return null;                 }                 return new jsonprimitive(new simpledateformat("yyyy-mm-dd hh:mm:ss").format(src.gettime()));             }         });         gson gson = builder.create();         return gson.tojson(object); } 

as en example, externalprofile hold (as string value):

{"profile":{"registrationnumber": 11111}} 

after store jsonstring in user object, , convert user object json:

user user = new user(); user.setexternalprofile(new jsonstring(externalprofile)),   string json = customjsonbuilder(user); 

json hold like:

{\"profile\":{\"registrationnumber\": 11111}} 

so, externalprofile jsonstring serialized gson string primitive, adding slashes in front of doublequotes. want gson leave jsonstring is, because usable json. i'm looking type adapter / reader-writer this, can't work.

as stated alexis c:

store externalprofile jsonobject first:

new gson().fromjson(externalprofile, jsonobject.class)); 

and let gson serialize again when outputting user object. produce same json!