Gson-Fire TypeSelector Hierarchy

gson-fire_type_selector_hierarchy_question.groovy

@Grab(group='io.gsonfire', module='gson-fire', version='1.3.1')

import com.google.gson.Gson
import com.google.gson.GsonBuilder
import com.google.gson.JsonElement

import io.gsonfire.GsonFireBuilder
import io.gsonfire.TypeSelector

GsonFireBuilder builder = new GsonFireBuilder()
    .registerTypeSelector(Base.class, new TypeSelector<Base>() {
        @Override
        public Class<? extends Base> getClassForElement(JsonElement readElement) {
            String type = readElement.getAsJsonObject().get("type").getAsString()
            return Class.forName(type)
        }
    })
Gson gson = builder.createGsonBuilder().setPrettyPrinting().create()

C c1 = new C()
c1.type = 'C'

C c2 = new C()
c2.type = 'C'
c1.myA = new B('B')

println gson.toJson(c1)

def obj = gson.fromJson(gson.toJson(c1), C.class)

println gson.toJson(c1)

abstract class Base {

    String type
}

abstract class A extends Base {

    String a = 'Abstract value'
}

class B extends A {
    
    String b = 'Something B'
    B(String type){ this.type = type }
}

class C extends Base {
    
    A myA
}