I\'d like to produce Partials from Strings, but can\'t find anything in the API that supports that. Obviously, I can write my own parser outside of the Joda-Time framework
The ISODateTimeFormat class allows partial printing. As you say, there is no parsing method on DateTimeFormatter (although you can parse to a LocalDate and interpret that).
ThreeTen/JSR-310 has the DateTimeFields class which replaces Partial. Parsing of partials into a CalendricalMerger is supported, however that may not be convertable back into a DateTimeFields yet.