Thanks for the quick reply! I don't have a copy of the ISO8601 standard, unfortunately it costs $134. But the W3C XML Schema datatype xs:duration uses the same format (see http://www.w3.org/TR/xmlschema-2/#duration), and they indicate that the sign should lead the entire string. Is the XML Schema datatype just a subset of the ISO8601 format that specifies a particular placement of the sign?
Is there a way I could build my own PeriodFormatterBuilder to define this? I have been poking around with it, but I don't see an API for controlling where the minus sign is placed. One of the threads from a few years ago (http://sourceforge.net/mailarchive/message.php?msg_id=28027662) seems to indicate that the fields are independently signed, so I'm not sure how easy it would be to aggregate this into an overall sign - you'd potentially have to sum the fields to determine the overall sign. Thanks for any ideas! -Craig -----Original Message----- From: Stephen Colebourne [mailto:scolebou...@joda.org] Sent: Wednesday, June 19, 2013 10:48 AM To: Discussion of the Joda project Subject: Re: [Joda-interest] How to handle Period with negative length? Joda-Time doe snot support this XML encoding with a leading sign. Its not a standard ISO-8601 format AFAICT. Instead, we use P-120D. Stephen On 19 June 2013 15:31, Gemmill, Craig <craig.gemm...@tridium.com> wrote: > Hi all- > > > > I'm new to using Joda-time, but I have a question about using Period > with negative times. According to the XML Schema xs:duration > datatype, and as far as I can tell, the ISO8601 format, a negative > duration would be expressed with a leading minus sign. For example, > minus 120 days would be "-P120D". However, I tried a quick > 'roundtrip' test using org.joda.time.Period and > org.joda.time.format.ISOPeriodFormat, and this doesn't seem to work: > > > > import org.joda.time.Period; > > import org.joda.time.format.ISOPeriodFormat; > > > > public class PeriodTester > > { > > public static void main(String[] args) > > { > > Period p = new Period(-8); > > String s = ISOPeriodFormat.standard().print(p); > > Period p1 = ISOPeriodFormat.standard().parsePeriod(s); > > System.out.println("p:"+p+"; ->s:"+s+"; ->p1:"+p1); > > } > > } > > > > I would expect this to output: > > p:-PT0.008S; ->s:-PT0.008S; ->p1:-PT0.008S > > > > But instead I get > > p:PT-0.008S; ->s:PT-0.008S; ->p1:PT0.008S > > > > So this is not able to survive an encode/decode. It appears that the > encoder is not putting the minus sign in the right place, but the > decoder is expecting a leading sign? > > > > Is there a better way to encode the Period so that it uses a leading > minus sign? > > > > Thanks! > > > > > ---------------------------------------------------------------------- > -------- This SF.net email is sponsored by Windows: > > Build for Windows Store. > > http://p.sf.net/sfu/windows-dev2dev > _______________________________________________ > Joda-interest mailing list > Joda-interest@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/joda-interest > ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Joda-interest mailing list Joda-interest@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/joda-interest ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Joda-interest mailing list Joda-interest@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/joda-interest
