Hi Christian and Fabrice, thanks for your suggestion which indeed makes sense! :D Happy that at least my message has been useful for something else. Regards, Marco.

On 23/01/2017 17:24, Christian Grün wrote:

Hi Marco,

Fabrice has already given you the correct hint: Wrapping your json elements with <json <json type='array'> should do the trick.

Anyway, thanks for the hint to the NullPointerException, this issue has been fixed.

Cheers, Christian

On Mon, Jan 23, 2017 at 9:31 AM, Marco Lettere m.lettere@gmail.com wrote:

...

Hello all,

this morning just stumbled into this issue and I'm wondering whether it could be somehow smoothed up ...

I have the following RestXQ function:

declare %rest:path("/f") %rest:GET %output:method("json") function a:f() { (:code ...:) };

1. Replacing comment with the following code correctly returns an empty

object:

let $out := (<json type="object"></json>) return $out

2. Replacing comment with the following code correctly returns an expected

exception (" [SERE0023] Only one item can be serialized with JSON." :

let $out := (<json type="object"></json>, <json type="object"></json>) return $out

3. Replacing comment with the following code returns a somewhat less

expected Null-pointer exception :

let $out := (<json type="object"></json>, <json type="object"></json>) return array{$out}

4. In order to get the expected Json array I need to write the code like the

following:

let $out := (<json type="object"></json>, <json type="object"></json>) return array{ $out ! json:parse(json:serialize(.), map{ "format" : "map"}) }

I'm not sure whether the array could be inferred from the sequence directly in a pattern like 2. But I would expect that 3) should work. Isn't it?

Thanks for any explanation.

Regards,

Marco.