[#SES-277] Replace Sesame's own XMLDateTime with javax.xml.datatype.XMLGregorianCalendar?

Issue Details [XML]

Key:	SES-277
Type:	Improvement
Status:	Open
Priority:	Minor
Assignee:	Unassigned
Reporter:	Arjohn Kampman
Votes:	0
Watchers:	0

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Sesame

Replace Sesame's own XMLDateTime with javax.xml.datatype.XMLGregorianCalendar?

Created: 31/May/06 03:30 PM Updated: 09/Oct/06 10:24 AM

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Description

The class javax.xml.datatype.XMLGregorianCalendar that is available since Java 1.5 might be able to replace our own implementation for verification, normalization and comparisons of xsd:dateTime values. Conformance and performance of XMLGregorianCalendar will have to be investigated first.

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Comment by Arjohn Kampman [09/Oct/06 10:23 AM]

XMLGregorianCalendar was found to do very lax parsing of values. It accepts a lot of values that are not correct dates according to the spec. Most notably, it accept the year "0000" which should have been rejected. Further, it isn't able to handle some of the correct test cases, like years outside the int range and the "24:00:00"
time. Also, it isn't able to normalize dates to their canonical value; XMLGregorianCalendar.normalize() simply normalizes the timezone to UTC.

Conclusion: without any improvements to XMLGregorianCalendar, this class is unusable to validate xsd:dateTime instances.