JsonUtil helper for GWT

import java.util.*;
import com.google.gwt.json.client.*;

public class JsonUtil {

    public static <T extends JSONValue> List<T> toList(JSONArray array, Class<T> clazz) {
        final List<T> list = new ArrayList<>(array.size());
        for (int i = 0; i < array.size(); i++) {
            switch (clazz.getSimpleName()) {
                case "JSONArray":   list.add((T) array.get(i).isArray());   break;
                case "JSONObject":  list.add((T) array.get(i).isObject());  break;
                case "JSONString":  list.add((T) array.get(i).isString());  break;
                case "JSONNull":    list.add((T) array.get(i).isNull());    break;
                case "JSONBoolean": list.add((T) array.get(i).isBoolean()); break;
                case "JSONNumber":  list.add((T) array.get(i).isNumber());  break;
            }
        }
        return list;
    }
}