我可以在改造方法声明中使用可变参数吗? [英] Can I use varargs in a retrofit method declaration?

问题描述

我有一个 API 端点定义为:

I've got an API endpoint that is defined as:

GET https://api-server.com/something/{id_or_ids}

其中 ids 可以是单个对象 ID 或逗号分隔的 ID 列表.
例如
https://api-server.com/something/abcd1234
https://api-server.com/something/abcd1234,abcd4567,gdht64332

where ids can be a single object id or a comma separated list of ids.
e.g.
https://api-server.com/something/abcd1234
https://api-server.com/something/abcd1234,abcd4567,gdht64332

如果给出了单个 id(并且找到了匹配的对象)，我会返回一个 json 对象:
{ "blah" : "blah" }

if a single id is given (and a matching object is found) I get back a json object:
{ "blah" : "blah" }

如果给出多个 id，我会在 json 数组中得到响应:
[{"blah1":"bleh"}, {"blah2":"meh"}, {"blah3":"blah"}]

If multiple ids are given, I get the response in a json array:
[{"blah1":"bleh"}, {"blah2":"meh"}, {"blah3":"blah"}]

我目前认为我应该将其实现为两种方法(可以用一种方法完成吗?):

I'm currently thinking that I should implement this as two methods (can it be done in one?):

采用单个 ID 并返回单个对象:

@GET("/something/{id}")
void getObject (@Path("id") String objectId, Callback<MyObject> callback)

和

接受多个 id 并返回一组对象.

@GET("/something/{ids}")
void getObject (Callback<MyObject[]> callback,@Path("ids") String ... objectIds)

有没有办法提供第二种方法 varargs 并将它们连接到 id 字段中?

Is there a way to feed the 2nd method varargs and concatenate them in the id field?

谢谢

推荐答案

Retrofit 不知道你想如何加入路径中的字符串.虽然逗号似乎很明显，但没有理由有人想要管道 (|) 或冒号 (:) 或其他任何东西.

Retrofit can't know how you want to join the strings in the path. While commas seem obvious, there's no reason why someone might want pipes (|) or colons (:) or whatever.

正因为如此，我们什么都不做，全靠你来选择.

Because of this fact, we don't do anything and rely on you to choose.

有两种解决方案:

• 使用 String 作为参数类型并在调用站点加入.例如:

• Use String as the argument type and join at the call site. For example:

foo.getObject(Joiner.on(',').join(things));

使用自定义对象，其 toString() 方法处理返回一个或多个对象的正确格式.

Use a custom object whose toString() method deals with returning the correct format for one or many objects.

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