Where does this array come from ?

[Mateusz Romanowski]

Hi Brian,
I was thinking of overriding toString() and other object methods using
this.getClass()' RecordComponents.
Furthermore, the methods could be final or/and non-public.

Mateusz

On Wednesday, April 8, 2020, Brian Goetz <brian.goetz at oracle.com> wrote:
> Turning this around, though: what’s the use case you have in mind where
interfaces aren’t good enough?  For _new_ code, you can always turn it into
an interface.  So I guess it would be for _exisitng_ abstract classes, like
Number?  Are there other examples you have in mind?
>
>> On Apr 7, 2020, at 2:33 PM, Mateusz Romanowski <
romanowski.mateusz at gmail.com> wrote:
>>
>> Hi,
>> Could we allow record classes to extend abstract stateless classes (same
as
>> in valhalla) that also extend java.lang.Record.
>>
>> I think that such functionality is needed (at least in JVM view) for
inline
>> records.
>>
>> Should it also be made available to non-inline records?
>>
>> Thanks,
>> Mateusz
>>
>>
>>
>> On Tuesday, April 7, 2020, Remi Forax <forax at univ-mlv.fr> wrote:
>>> Create an an interface with a default method toJSON().
>>>
>>> interface DeriveJSON {
>>>  public default String toJSON() {
>>>    // use an object mapper or whatever you want here
>>>  }
>>> }
>>>
>>> so when you want a Point with a method toJSON(), you can write
>>>  record Point(x, y) implements DeriveJSON { }
>>>
>>> With a little work, you can make toJSON to use a polymorphic inlining
>> cache (good for benchmark) and with the upcoming hidden classes have a
>> constant cost if it becomes megamorphic without generating bytecode.
>>>
>>> Rémi
>>>
>>> ----- Mail original -----
>>>> De: "Stephen Colebourne" <scolebourne at joda.org>
>>>> À: "amber-dev" <amber-dev at openjdk.java.net>
>>>> Envoyé: Lundi 6 Avril 2020 15:45:48
>>>> Objet: Re: Where does this array come from ?
>>>
>>>> FWIW, a colleague has previously argued that the toString of a bean
>>>> should be JSON. At a company he worked at, all their beans were JSON
>>>> and it apparently allowed them to build tooling on top of the
>>>> toString. I'm not sure I'm convinced about JSON, but I do think a
>>>> record is closer to a map than a list. And yes, Joda-Beans uses {} not
>>>> [].
>>>> Stephen
>>>>
>>>>
>>>> On Mon, 6 Apr 2020 at 14:01, Brian Goetz <brian.goetz at oracle.com>
wrote:
>>>>>
>>>>> Perhaps we should rotate the punctuation every version just to
>> discourage
>>>>> parsing :)
>>>>>
>>>>>> On Apr 6, 2020, at 7:34 AM, Remi Forax <forax at univ-mlv.fr> wrote:
>>>>>>
>>>>>> I've was debugging a code yesterday that was printing
>>>>>> Empty[]
>>>>>>
>>>>>> After some head scratching, trying to find an array of Empty, i found
>> that it
>>>>>> was just an empty record
>>>>>> record Empty() { }
>>>>>>
>>>>>> This is another clue that using square brackets for toString() is a
>> bad idea !
>>>>>>
>>>>>> regards,
>>>>>> Rémi
>>>
>
>