Convert JSON String to generic object in JAVA (with GSON) -

i have api returns json. response in format can fit object called apiresult , contains context <t> , int code.

apiresult declared in generic way, e.g. apiresult<someobject>

i know how gson convert incoming json string apiresult<t>

so far have:

type apiresulttype = new typetoken<apiresult<t>>() { }.gettype(); apiresult<t> result = gson.fromjson(json, apiresulttype); 

but still returns converts context linkedhashmap instead (which assume gson falls to)

you have know t going be. incoming json fundamentally text. gson has no idea object want become. if there's in json can clue off of create t instance, can this:

public static class myjsonadapter<x> implements jsondeserializer<apiresult<x>> {     public apiresult<x> deserialize( jsonelement jsonelement, type type, jsondeserializationcontext context )       throws jsonparseexception     {       string classname = jsonelement.getasjsonobject().get( "_class" ).getasstring();       try       {         x mything = context.deserialize( jsonelement, class.forname( classname ) );         return new apiresult<>(mything);       }       catch ( classnotfoundexception e )       {         throw new runtimeexception( e );       }     } } 

i'm using field "_class" decide x needs , instantiating via reflection (similar pompom's example). don't have such obvious field, there has way @ jsonelement , decide based on what's itn type of x should be.

this code hacked version of similar did gson while back, see line 184+ at: https://github.com/chriskessel/myhex/blob/master/src/kessel/hex/domain/gameitem.java