Expose Mutator object in Obj-C

[vicng]

The Mutator object can't be exposed in Obj-C objective due to its dependency on AEXML, which is not Obj-C compatible.

I've submitted a PR to the AEXML project to support Obj-C (tadija/AEXML#111). Not sure how likely this is to succeed, since we don't own this project, so the owner may not agree with it.

If this doesn't pass, then we'll have to either:

1. Change to an XML library that supports both Swift/Obj-C.
2. Change the signature of Mutator to use String instead of AEXML objects directly. Not a huge fan of this solution though.

[boozook]

@vicng
I have a very radical proposal.
I think perhaps we should abandon the use of XML.
I suggest to use JSON everywhere. Or an even better option would be YAML. (for example 1, 2, 2*, 3).

[vicng]

It definitely is radical...and unfortunately, too radical :)

Our data formats (XML for workspace/mutators/events and JSON for block definitions) were first defined on web and then ported over to iOS and Android. One of our goals has been to support easy cross-platform development, so making a change would need to be done across all 3 libraries. It would be a large undertaking to consolidate our formats at this point.

[boozook]

Okay, thanks.
Then what about schema for xml format? ;)
(and for json too)

[vicng]

I'm not sure I understand your question -- what about the XML/JSON schemas?

[boozook]

Yes. xsd or dts.