试图从JSONArray中提取json对象

Question

这是我的JSONArray结构

{
"docs": [
    {
        "_index": "junit",
        "_type": "type",
        "_id": "2003",
        "_version": 1,
        "found": true,
        "_source": {
            "data": "\"year\":\"2003\"",
            "name": "2003",
            "type": "year",
            "ancestors": [
                "PARTS"
            ],
            "child": {
                "year_make": [
                    {
                        "name": "Honda",
                        "id": "2003_Honda"
                    }
                ]
            }
        }
    },
    {
        "_index": "junit",
        "_type": "type",
        "_id": "2003_Honda",
        "_version": 1,
        "found": true,
        "_source": {
            "data": "\"year\":\"2003\", \"make\":\"Honda\"",
            "name": "2003_Honda",
            "type": "year_make",
            "ancestors": [],
            "child": {}
        }
    }
]}

这是我想将响应转换为

的java对象

public class PartsNode extends Node {

   @Id
   String id;
   ...
}

上面的类扩展了这个抽象类

public abstract class Node {

   String name;

   List<String> ancestors = new ArrayList<>();

   String type;

   Map <String, Set<ChildInfo>> child = new LinkedHashMap<>();

   String data;
} 

我正在尝试做这样的事情

 private List<T> translateResponseToNodes(String responseBody, Class<T> classType) {
    List<T> nodes = new ArrayList<T>();
    if(StringUtils.isNotBlank(responseBody)) {
        JSONObject responseJson = new JSONObject(responseBody);
        JSONArray jsonArr = responseJson.getJSONArray("docs");
        int length = jsonArr.length();

        for(int i=0; i<length; i++){
            JSONObject jObj = jsonArr.getJSONObject(i);
            JsonElement data = (JsonElement) jObj.get("_source");
            Gson gson = new Gson();
            T node = gson.fromJson(data, classType);
            node.setId(jObj.get("_id").toString());
            nodes.add(node);
        }

    }

    return nodes;
}

目前我正在使用输入classtype来确定Node的类型。假设应该有更好的方法来做到这一点。