Custom ParameterizedType to work with generics in Gson

package stackoverflow.generics;

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.List;

import com.google.gson.Gson;

public class TypeTokenAndGenerics {

    public static void main(String[] args) {
        d(new Factory<Integer>().deserialize("[1, 2, 3, 4]", Integer.class));
        d(new Factory<String>().deserialize("[\"foo\", \"bar\", \"baz\"]", String.class));
        d(new Factory<Color>().deserialize("[{\"label\": \"red\" }, {\"label\": \"blue\"}]", Color.class));
    }

    static void d(List<?> list) {
        System.out.println(java.util.Arrays.toString(list.toArray()));
    }

    static class Factory<T> {
        public List<T> deserialize(String json, Class<T> klass) {
            Gson gson = new Gson();
            return gson.fromJson(json, new ListOfSomething<T>(klass));
        }
    }

    static class ListOfSomething<X> implements ParameterizedType {

        private Class<?> wrapped;

        public ListOfSomething(Class<X> wrapped) {
            this.wrapped = wrapped;
        }

        @Override
        public Type[] getActualTypeArguments() {
            return new Type[] {wrapped};
        }

        @Override
        public Type getRawType() {
            return List.class;
        }

        @Override
        public Type getOwnerType() {
            return null;
        }

    }

    static class Color {

        public String label = "EMPTY";

        @Override
        public String toString() {
            return label;
        }
    }

}