Gson - deserialization to specific object type based on field value

Question

I want to deserialize json objects to specific types of objects (using Gson library) based on type field value, eg.:

[
    {
          \"type\":         


        

Answer 1

use https://github.com/google/gson/blob/master/extras/src/main/java/com/google/gson/typeadapters/RuntimeTypeAdapterFactory.java

then configure it with

public static final class JsonAdapterFactory extends 
    RuntimeTypeAdapterFactory {
        public JsonAdapterFactory() {
            super(MyBaseType.class, "type");
            registerSubtype(MySubtype1.class, "type1");
            registerSubtype(MySubtype2.class, "type2");
        }
}

and add the annotation:

@JsonAdapter(MyBaseType.JsonAdapterFactory.class)

to MyBaseType

Much better.