api - Gson Deserialization error: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING -

i've seen many questions on topic, can't seem find solution problem.

i'm getting deserialization error:

com.google.gson.jsonsyntaxexception: java.lang.illegalstateexception: expected begin_object string @ line 1 column 3384

when deserializing routingtable clas specifically, decerialization works else. i've uploaded serialized json data here: http://jsonfiddle.net/bx0ga

class serialize:

public class routingtable {     private transient final node localnode;  // current node     private final kadbucket[] buckets;       {         buckets = new kadbucket[nodeid.id_length];     }     // methods.... } 

kadbucket class:

public class kadbucket implements bucket {     private final int depth;     private final map<nodeid, node> nodes;      {         nodes = new hashmap<>();     }     // methods , on } 

serialization code: have serialization class handles serialization using generics:

public class jsonserializer<t> implements kadserializer<t> {     private final gson gson;     {         gson = new gson();     }      @override     public void write(t data, dataoutputstream out) throws ioexception     {         try (jsonwriter writer = new jsonwriter(new outputstreamwriter(out)))         {             writer.beginarray();              /* store content type */             gson.tojson(data.getclass().getname(), string.class, writer);              /* store content */             gson.tojson(data, data.getclass(), writer);              writer.endarray();         }     }      @override     public t read(datainputstream in) throws ioexception, classnotfoundexception     {         try (datainputstream din = new datainputstream(in);                 jsonreader reader = new jsonreader(new inputstreamreader(in)))         {             reader.beginarray();              /* read class name */             string classname = gson.fromjson(reader, string.class);              /* read , return content*/             return gson.fromjson(reader, class.forname(classname));         }     } } 

so serialization, do:

// writing dout output stream new jsonserializer<routingtable>().write(this.localnode.getroutingtable(), dout);  // reading din input stream routingtable irtbl = new jsonserializer<routingtable>().read(din); 

using works every other class in system, except routing tables.

routingtable contains class variable transient, used indicate field should not serialized.