[threeten-dev] Handling Leap Month in Chronology subclass

[yoshito_umaoka at us.ibm.com]

Hello all,

I recently walked through JSR-310 APIs in detail. In general, overall 
design looked great and I did not see any major issues.

I have one question about implementing Chronology subclass supporting 
Chinese calendar and its variants.

Chinese calendar is a lunisolar calendar system and leap month might be 
inserted at certain rule. It differs from Hijrah calendar that insert leap 
month at the end of year cycle (13th month).
In ICU project, we found than leap months in Chinese calendar require 
extra field to indicate leap month. This is doable with java.util.Calendar 
subclass, although additional field is a little bit tricky.

I'm wondering if there is a good way to support such calendar with JSR-310 
Chronology without messing up month numbering.

I have a few more minor comments about JSR-310 design and will post them 
in a separate message.

Thanks,
Yoshito Umaoka (ICU Project at IBM)