In javascript a map is simply a different way of accessing the r/w the
properties of an object.
var map = {};
map["FirstName"] = ''Niclas";
map["LastName"] = "Hedhman";
var keys = Object.keys(map); // ['Firstname', 'LastName']
ending up as
map : {
"FirstName" : "Niclas",
"LastName" : "Hedhman"
}
when serialized as JSon.
So i would say that the second form is definitely the "natural" one.
Could the implementation of migrations for stored data, possibly
combined with specifying some sort of "protocol version" be of some use?
/Kent
Den 21-05-2015 kl. 10:37 skrev Niclas Hedhman:
> I have been looking at this issue and I wonder if there are any notes from
> the original implementation...
>
> For instance, a regular Map is serialized to
> map: [
> { "key" : "FirstName", "value" : "Niclas" },
> { "key" : "LastName", "value" : "Hedhman" }
> ]
> but it could have been made;
>
> map : {
> "FirstName" : "Niclas",
> "LastName" : "Hedhman"
> }
>
> My guess is that there is "schema" reasons for this. Also, it is not
> something that can now be changed, at least not without adding built-in
> handing of old format (which is a possibility).
>
> One of the usecases of this outside of the storage, would be using this
> serialization SPI for the toValue() and toEntity() methods, in which case
> the serialization would end up being processable in JavaScript.
>
> So, in that case, would it makes more sense to have "key"/"value", or to
> have Maps showing up as objects?? I am not that fluent in JavaScript to
> have an opinion. I can imagine that having the second/object form, is neat
> when one knows what is coming over the wire, but could messy to iterate as
> built-in attributes need to be filtered out. Or?
>
>
> // Niclas
>
> On Thu, May 21, 2015 at 7:55 AM, Niclas Hedhman <[email protected]> wrote:
>
>> Jiri,
>> thanks for your analysis of why it breaks.
>>
>> I assume that a JSON Object for NamedAssociation is the correct path
>> forward,
>>
>> {
>> "left" : "723470239476",
>> "right" : "109874275692"
>> }
>>
>> instead of the JSON Array which needs inner objects in that case,
>>
>> [
>> { "left" : "723470239476" },
>> { "right" : "109874275692" }
>> ]
>>
>> Paul, your thoughts?
>>
>> Cheers
>> --
>> Niclas Hedhman, Software Developer
>> http://zest.apache.org - New Energy for Java
>>
>
>
