com.google.gson.JsonObject cannot be cast to com.google.gson.JsonArray

Question

I have some trouble with parsing a JSON response. The response data:

{
    "deal": {
        "categorie": {
            "description": "Offres Shopping",
            "idcategorie": "1",
            "nom": "Shopping"
        },
        "conditions": "2 personne au plus",
        "dateAjout": "2013-01-07T00:00:00+01:00",
        "dateExp": "2013-01-31T00:00:00+01:00",
        "description": "nuit dans un hotel 5 etoile",
        "heurexp": "12",
        "iddeal": "1",
        "minutesexp": "30",
        "prestataire": {
            "adresse": "Qu zohour 44",
            "codePostale": "12600",
            "description": "Hotel 5 etoiles",
            "idprestataire": "1",
            "nom": "Hotel ronald",
            "pays": "France",
            "telephone": "99999999",
            "ville": "Brest"
        },
        "prix": "80.0",
        "prixHabituel": "200.0",
        "tags": "hotel",
        "titre": "Nuit 5 etoiles"
    }
}

When trying to parse this response to a List<Deal> I get this exception:

com.google.gson.JsonObject cannot be cast to com.google.gson.JsonArray

This is the code that I am using for the parse:

if (reponse != null && !reponse.isEmpty()) {
System.out.println(reponse);

Gson g = new Gson();
JsonParser parser = new JsonParser();
JsonObject jObject = parser.parse(reponse).getAsJsonObject();
JsonArray jArray =  jObject.getAsJsonArray("deal");  // here goes the Exception
for (JsonElement elem : dealArray) {
deals.add(g.fromJson(elem, Deal.class));
}

    System.out.println(deals.toString());
    return "success";
}

thanks

Perception · Accepted Answer · 2013-01-07 03:26:27Z

5

Well, deal is not a JSON array, its a JSON object. Hence the exception. A JSON array, for reference, would look more like this:

"deal" : [{"attr" : "value"}, {"attr" : "value"}]

answered Jan 7, 2013 at 3:26

Perception

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6 Comments

stackHunter Over a year ago

yes but when i call jsonObejct.getAsJsonArray("deal") i want to get the JsonArray i have this exception

Perception Over a year ago

I'm not sure how to break this down further, you can't get a JSON array from your object, because there is no array in it. There is literally no array in the entirety of the JSON you posted. Are you, perhaps, trying to access the attributes of deal?

stackHunter Over a year ago

yes but i use the google library for json Gson & it's offer that possibility transform a jsonObject to an JsonArray but i don't know why i have this error

Perception Over a year ago

Ok, oblige me here. Before doing the conversion, add this line to your code, and tell me the result - System.out.println("Is Array: " + jsonObject.get("deal").isJsonArray());

stackHunter Over a year ago

I want to convert the JsonObject to a JsonArray to create my object usin new Gson().from(JsonElement,Deal.class)

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