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GSON Ожидаемый BEGIN_ARRAY, но был BEGIN_OBJECT

Я получаю эту ошибку, когда получаю только один элемент в списке. Я использую Jersey в серверной веб-службе REST, я получаю ошибку только тогда, когда List возвращает один единственный элемент, и когда он имеет 0 elements, я получаю Java.lang.NullPointerException, но когда он имеет более одного, он работает отлично, и это Вот как я это делаю:

@GET
@Path("getproject")
@Produces(MediaType.APPLICATION_JSON)
public List<Project> getPagedProjects(
       @QueryParam("offset") int offset,
       @QueryParam("limit") int limit,
       @QueryParam("searchKey") String searchKey) throws Exception {

  System.out.println("Returning Paged Project ");
  return projectService.getPagedProjects(offset, limit, searchKey);
}

Почему Джерси не отправляет список, содержащий один элемент? Это ошибка в Джерси? Есть ли способ заставить его всегда сериализовать как массив?

Это мои данные JSON, когда веб-сервис возвращает 0 элемент:

null

И это мои данные JSON, когда веб-сервис возвращает 1 элемент:

{
    "project": {
        "abbreviation": "abc",
        "customer": "customer1",
        "description": "description3",
        "icon": "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",
        "name": "projectname3",
        "plannedEndDate": "2012-05-23T00:00:00+01:00",
        "plannedStartDate": "2012-05-23T00:00:00+01:00",
        "projectStatus": {
            "name": "In Progress"
        },
        "realEndDate": "2012-05-23T00:00:00+01:00",
        "realStartDate": "2012-05-23T00:00:00+01:00"
    }
}

И это мои данные JSON, когда веб-сервис возвращает более 1 элемента:

{
    "project": [
        {
            "abbreviation": "abd",
            "customer": "customer1",
            "description": "description1",
            "icon": "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",
            "name": "projectname1",
            "plannedEndDate": "2012-05-25T00:00:00+01:00",
            "plannedStartDate": "2012-05-23T00:00:00+01:00",
            "projectStatus": {
                "name": "Opened"
            },
            "realEndDate": "2012-05-25T00:00:00+01:00",
            "realStartDate": "2012-05-23T00:00:00+01:00"
        },
        {
            "abbreviation": "bd",
            "customer": "customer1",
            "description": "description2",
            "icon": "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",
            "name": "projectname2",
            "plannedEndDate": "2012-05-23T00:00:00+01:00",
            "plannedStartDate": "2012-05-23T00:00:00+01:00",
            "projectStatus": {
                "name": "Closed"
            },
            "realEndDate": "2012-05-23T00:00:00+01:00",
            "realStartDate": "2012-05-23T00:00:00+01:00"
        },
        {
            "abbreviation": "abc",
            "customer": "customer1",
            "description": "description3",
            "icon": "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",
            "name": "projectname3",
            "plannedEndDate": "2012-05-23T00:00:00+01:00",
            "plannedStartDate": "2012-05-23T00:00:00+01:00",
            "projectStatus": {
                "name": "In Progress"
            },
            "realEndDate": "2012-05-23T00:00:00+01:00",
            "realStartDate": "2012-05-23T00:00:00+01:00"
        }
    ]
}

А на стороне Android я десериализирую ответ JSON следующим образом:

Gson gson = new Gson();
final ProjectContainer container = gson.fromJson(resultat, ProjectContainer.class);
final ListView lv = (ListView) findViewById(R.id.list);
adaptateur = new ProjectAdapter(ProjectActivity.this, R.layout.ligne_project, container);
lv.setAdapter(adaptateur);

Это мой класс ProjectContainer:

  public class ProjectContainer {
        @SerializedName("project")
        List<Project> projects ;

        public List<Project> getProjects() {
            return projects;
        }    
        public void setProjects(List<Project> projects) {
            this.projects = projects;
        }
    }

Буду очень признателен за помощь в решении этой проблемы. заранее спасибо

12
Wijden

Результаты вашей проблемы действительно странные для меня ... кажется, что должна быть какая-то проблема с сериализацией JSON Джерси для одноэлементных массивов Джерси ... если вы Google "одноэлементные массивы JSON Джерси" вы найдете такая же проблема, как здесь или здесь . Я не слишком много знаю о Джерси, поэтому я не могу помочь вам с этим ...


Тем не менее, я могу предложить обходной путь, используя ручной синтаксический анализ в Gson, чтобы адаптировать ваш анализ к 2 различным ответам (объект или массив). Вы могли бы сделать что-то вроде этого:

//manually parsing until get the "project" element...
JsonParser parser = new JsonParser();
JsonObject rootObejct = parser.parse(yourJsonString).getAsJsonObject();
JsonElement projectElement = rootObejct.get("project");

Gson gson = new Gson();
List<Project> projectList = new ArrayList<>();

//Check if "project" element is an array or an object and parse accordingly...
if (projectElement.isJsonObject()) {
    //The returned list has only 1 element
    Project project = gson.fromJson(projectElement, Project.class);
    projectList.add(project);
}
else if (projectElement.isJsonArray()) {
    //The returned list has >1 elements
    Type projectListType = new TypeToken<List<Project>>() {}.getType();
    projectList = gson.fromJson(projectElement, projectListType);
}

//Now you have a List<Project> projectList with one or many Project elements, 
//depending on the response...

Обратите внимание, что вам не нужен ваш класс ProjectContainer.

Нечто подобное должно работать для вас, хотя, очевидно, лучше всего было бы исправить проблему сериализации!

13
MikO

По сути, ваш веб-сервис не работает с точки зрения того, как он отвечает. Если для project есть только один объект, он возвращает только объект вместо массива. 

Ответ MikO решает проблему, но другой подход заключается в инкапсуляции этой логики в пользовательский десериализатор: 

class MyDeserializer implements JsonDeserializer<ProjectContainer> {

    @Override
    public ProjectContainer deserialize(JsonElement je, Type type, JsonDeserializationContext jdc) throws JsonParseException {

        JsonObject jo = je.getAsJsonObject().getAsJsonObject("project");
        if (jo.isJsonArray()) {
             return new Gson().fromJson(je, ProjectContainer.class);
        } else {
             Project p = jdc.deserialize(jo, Project.class);
             List<Project> pList = new ArrayList<Project>(1);
             pList.add(p);
             ProjectContainer pc = new ProjectContainer();
             pc.setProjects(pList);
             return pc;
        }
    }
}

Тогда вы можете использовать:

Gson gson = new GsonBuilder()
                .registerTypeAdapter(ProjectContainer.class, new MyDeserializer())
                .build();
ProjectContainer pContainer = gson.fromJson(myJson, ProjectContainer.class);
5
Brian Roach

В итоге я использовал библиотеку Джексона вместо gson для анализа ответа json. Он автоматически преобразует объект в ArrayList. Это очень похоже на gson с точки зрения простоты использования. Надеюсь, поможет!

0
Abhishek V