This should also work with YearMonthDay, and yes you can divide using the days. (It was late!)
Stephen On 08/11/06, Richard HALLIER <[EMAIL PROTECTED]> wrote: > Thank you Stephen for your solution. > Does the cvs/svn snapshot support your example ? Is it stable enough and > when the next release is planned ? In this case, I will download the latest > snapshot. > > Moreover, I still reference dates with YearMonthDay, is LocalDate more > relevant ? > At last, is it necessary to convert days in seconds to operate the division > ? > Thank you for your support. > Richard > > > -----Message d'origine----- > > De : [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] De la > > part de Stephen Colebourne > > Envoyé : mardi 7 novembre 2006 22:06 > > À : Discussion of the Joda project > > Objet : Re: [Joda-interest] Need advice - Fractional Periods > > > > Richard HALLIER wrote: > > > My customer asks me for calculating the number of months between 2 > > > dates with the following pattern (actually an example): > > > > > > start date = 17 january 2006 > > > end date = 28 april 2006 > > > > > > The expected result is : > > > (31-17+1)/31 (31 days in january) > > > + 2 (february and march) > > > + (28/30) (30 days in april) > > > = 3.42 > > > > That feels like an unusual calculation design, although I'd > > welcome anyone else's comments on the merits of the algorithm. > > > > Joda-Time, does not really have any support for this at > > present. So, you will need to treat the three parts (first > > month, in between months, last > > month) separately. > > > > The new Joda-Time 1.4 will contain classes named Days, Hours, > > Minutes and Seconds. These may be useful here: > > > > LocalDate start = new LocalDate(2006, 1, 17); LocalDate > > endOfMonth = start.dayOfMonth().withMaximumValue(); > > > > Days days = Days.daysBetween(firstOfMonth, start); days = > > days.plus(1); // needed to to count days inclusively Seconds > > secs = days.toStandardSeconds(); > > > > Days daysInMonth = Days.days(start.dayOfMonth().getMaximumValue()); > > Seconds secondsInMonth = daysInMonth.toStandardSeconds(); > > > > double fractionInMonth = secs.getSeconds() / > > secondsInMonth.getSeconds(); > > > > Although this algorithm could be repeated for each month, it > > will be more efficient to only use it on those months which > > are fractional. > > > > > > I guess the question for Joda-Time is whether support for decimal > > calculations like this is needed. For example, the Days class has a > > dividedBy(int) method which returns another Days and uses int > > division. > > Maybe we should have a dividedBy(Days) that returns a double or a > > BigDecimal? > > > > Stephen > > > > -------------------------------------------------------------- > > ----------- > > Using Tomcat but need to do more? Need to support web > > services, security? > > Get stuff done quickly with pre-integrated technology to make > > your job easier > > Download IBM WebSphere Application Server v.1.0.1 based on > > Apache Geronimo > > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&; > > dat=121642 > > _______________________________________________ > > Joda-interest mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/joda-interest > > > > > ------------------------------------------------------------------------- > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job easier > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > _______________________________________________ > Joda-interest mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/joda-interest > ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Joda-interest mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/joda-interest
