java - LocalDate interval in Joda-time

Question

Joda-time has an Interval class, which is a range between DateTimes. What can be used for a range of LocalDates?

I want an object that represents, for example "from 1/1/2011 to 10/1/2011", without the time (or timezones) ever coming into the picture.

As far as I see, joda-time doesn't have anything built in for that. If there doesn't exist anything for it, and we'd create it, what should it look like? Most importantly, which interfaces from joda-time could it implement to best integrate into the other types, staying consistent with the joda-time design? Would it make sense for it to implement ReadableInterval, where getStart and getEnd return DateMidnight?

Answer 1

I personnaly use the Range class from Guava.

It supports open ended ranges. It is also possible to specify included or excluded bounds. Among other numerous possibilities, those allow to easily represent "before a date" or "after a date".

Example for open-ended intervals.

Range<LocalDate> before2010 = Range.atMost(new LocalDate("2009-12-31"));
Range<LocalDate> alsoBefore2010 = Range.lessThan(new LocalDate("2010-01-01"));

It also offerts easy testing predicates, like contains and containsAll, and an intersection operation. All this tested and maintained.