我遇到的问题是我正在解析的API为大小为1的ARRAY返回一个OBJECT.

例如,有时API会响应：

{
    "monument": [
        {
            "key": 4152,
            "name": "MTS - Corporate Head Office",
            "categories": {},
            "address": {}
        },
        {
            "key": 4151,
            "name": "Canadian Transportation Agency",
            "categories": {},
            "address": {}
        },
        {
            "key": 4153,
            "name": "Bank of Montreal Building",
            "categories": {},
            "address": {}
        }
    ],
}

但是,如果纪念碑阵列只有1个项目,它就变成了一个OBJECT(注意缺少[]括号),如下所示：

{
    "monument": {
        "key": 4152,
        "name": "MTS - Corporate Head Office",
        "categories": {},
        "address": {}
    }
}

如果我像这样定义我的模型,只返回一个项目时会出错：

public class Locations {
    public List<Monument> monument;
}

如果只返回一个项目,我会收到以下错误：

Expected BEGIN_OBJECT but was BEGIN_ARRAY ...

如果我像这样定义我的模型：

public class Locations {
    public Monument monument;
}

并且API返回ARRAY我得到了相反的错误

Expected BEGIN_ARRAY  but was BEGIN_OBJECT ...

我无法在模型中定义多个具有相同名称的项目.
我该如何处理这个案子？

注意：我无法对API进行更改.

解决方法:

作为我之前回答的补充,这是使用TypeAdapter的解决方案.

public class LocationsTypeAdapter extends TypeAdapter<Locations> {

    private Gson gson = new Gson();

    @Override
    public void write(JsonWriter jsonWriter, Locations locations) throws IOException {
        gson.toJson(locations, Locations.class, jsonWriter);
    }

    @Override
    public Locations read(JsonReader jsonReader) throws IOException {
        Locations locations;

        jsonReader.beginObject();
        jsonReader.nextName();       

        if (jsonReader.peek() == JsonToken.BEGIN_ARRAY) {
            locations = new Locations((Monument[]) gson.fromJson(jsonReader, Monument[].class));
        } else if(jsonReader.peek() == JsonToken.BEGIN_OBJECT) {
            locations = new Locations((Monument) gson.fromJson(jsonReader, Monument.class));
        } else {
            throw new JsonParseException("Unexpected token " + jsonReader.peek());
        }

        jsonReader.endObject();
        return locations;
    }
}