@Roberto,
Agreed in all points. double[] and Double[] is not the same thing in java
although it may be possible to be the same in js.
So until java supports autoboxing and unboxing in arrays I can see your
point.
Vassilis
On Tue, Jun 27, 2017 at 1:41 AM, 'Roberto Lublinerman' via GWT Contributors
<[email protected]> wrote:
>
>> @Roberto
>> Please note that I am not mixing stuff (java and js objects in the same
>> array, or different kind of objects in the same array).
>>
>> D3 is doing the correct thing here. If you pass an array of something,
>> let's say T[] you can expect that you will be getting T and T[] out of D3
>> functions (can't really remember the specifics). What I am passing are pure
>> js objects modeled with jsinterop, and they still count as js, not java. So
>> I am expecting to get back what I feed in / declared at the start.
>>
>>
> D3 is a JS api, even if some function says it will return an array of T,
> it is a JavaScript array, so there is no (type) guarantee that the array is
> of T. So it is an array of things, all of them of type T.
>
> A java T[] has even stronger semantics, if you set an element it will
> check that it is the correct type. So the D3 array is like an Object[] that
> happens to be filled all with Ts.
>
>
>> So what do I want: Double[] to be castable to double[] in the GWT js
>> context (not in the java context). I don't know if this is possible but it
>> is definitely desirable. (The same for String[] and Boolean[]) and a pony
>> of course :-)
>>
>>
> Again here Double[] and double[] have very different semantics in Java.
>
> - you can cast Double[] to Object[] but not double[] to Object[]
> - you can store nulls in Double[] but not in double[].
>
> They are semantically different. I agree that in some circumstances it
> seems convenient to ignore those. But in general GWT follows Java semantics
> (with a few exceptions)
>
>
>> Thanks again.
>>
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