反序列化复杂的json主体，验证其中的一个元素，然后通过它，映射到另一个元素（JAVA）是可能的吗？

我需要处理一个json数组，如下所示：

[
    {
        "id": "12345",
        "eauthId": "123451234512345123451234512345",
        "firstName": "Jane",
        "middieInitial": "M",
        "lastName": "Doe",
        "email": "janedoe@usda.gov",
        "roles": [
            {
                "id": "CTIS_ROLE_ID",
                "name": "A test role for CTIS",
                "treatmentName": "Fumigation"
            }
        ]
    },
    {
        "id": "67890",
        "eauthId": "678906789067890678906789067890",
        "firstName": "John",
        "middieInitial": "Q",
        "lastName": "Admin",
        "email": "johnadmin@usda.gov",
        "roles": [
            {
                "id": "CTIS_ADMIN",
                "name": "An admin role for CTIS",
                "treatmentName": "System Administration"
            }
        ]
    }
]

我的任务是找出用户的“角色”->“名称”，一旦匹配，获取该用户的电子邮件地址并使用该电子邮件地址登录。这似乎是一项简单的任务，但它真的让我扫兴不已，因为深入API对我来说是一项新任务。我尝试了不同的库（Jackson、restasured、jsonsimple），最后是GSon。我没有时间坐下来从头开始研究一切。我只是需要一个快速的解决方案。但这肯定不是很快。有人能帮我解决这个问题吗。我真的很感激

closeableHttpResponse = restClient.get(ConfigurationReader.get("base_url") + ConfigurationReader.get("user_endpoint"));
//Status code
int statusCode = closeableHttpResponse.getStatusLine().getStatusCode();
System.out.println("statusCode = " + statusCode);
String responseString = EntityUtils.toString(closeableHttpResponse.getEntity(), "UTF-8");
Type userListType = new TypeToken<List<Users>>(){}.getType(); 
List<Users> users = (List<Users>) new Gson().fromJson(responseString, userListType); 
Roles roles = new Gson().fromJson(responseString, Roles.class); 

---

代码的问题是

Type userListType = new TypeToken<List>(){}.getType();
List users = (List) new Gson().fromJson(responseString, userListType);

Type userListType = new TypeToken<List>(){}.getType();
List users = (List) new Gson().fromJson(responseString, userListType);

List[] users = (List[]) new Gson().fromJson(responseString, List[].class);