[threeten-dev] ZoneIdPrinterParser #262

[roger riggs]

Hi,

Inissue #262 <https://github.com/ThreeTen/threeten/issues/262>, the 
behavior of the DateTimeFormatterBuilder for ZoneIds
should be aligned with ZoneId.of as to which zoneid are accepted and
whether they create ZoneOffsets or ZoneIds.

Please review the changes and comment whether the test cases are correct.
There are a number of input values that were previously valid for parsing
of ZoneIds that are no longer valid (to match ZoneId).  For example,  
"UTC0" is no longer valid.

One inconvenience in the code after a prefix and the offset value is parsed
there is no public method to create the ZoneId.  The ZoneId.of method as 
to re-parse the input.
The method   static ZoneRegion ofPrefixedOffset(String zoneId, 
ZoneOffset offset)
is use for this purpose but it is package private and can't be used from 
the format package.
Is it reasonable to add a method to ZoneId for a similar purpose?

http://cr.openjdk.java.net/~rriggs/webrev-zoneid-parser-262/

Thanks, Roger