Question

I am using GSON library.
I have a programm which returns JSON.
JSON constructs and returns in this way:

Gson gson = new Gson();
//findNewComments returns List<Comment> comments
return gson.toJson(service.findNewComments(id,lastId));

So the result is:

[
    {
        "id": 43,
        "entryId": 19,
        "author": " m8w46",
        "body": "mw86",
        "date": "WED 9, 2011"
    },
    {
        "id": 44,
        "entryId": 19,
        "author": " n7w4",
        "body": "nw77w4",
        "date": "WED 9, 2011"
    }
]

But this array must be named as “comments”!

"comments": [
    {
        "id": 43,
        "entryId": 19,
        "author": " m8w46",
        "body": "mw86",
        "date": "WED 9, 2011"
    },
    {
        "id": 44,
        "entryId": 19,
        "author": " n7w4",
        "body": "nw77w4",
        "date": "WED 9, 2011"
    }
]

How can i do that?

Answer 1

Not sure if this is acceptable to you but:

public class CommentWrapper {
    List<Comments> comments;
    public CommentWrapper(List<Comment> comments) {
       this.comments = comments;
    }
}

Then you can do:

return new Gson().toJson(new CommentWrapper(service.findNewComments(id,lastId)));

Which results in:

{
    "comments": [
        ....your data here...
    ]
}

Not sure if the object syntax is acceptable to you or not.