Peter Winstanley created JENA-2189:
--------------------------------------
Summary: some XPath registry and function names are wrong
Key: JENA-2189
URL: https://issues.apache.org/jira/browse/JENA-2189
Project: Apache Jena
Issue Type: Bug
Components: Jena
Affects Versions: Jena 4.2.0, Jena 4.1.0, Jena 4.0.0, Jena 3.17.0, Jena
3.16.0, Jena 3.15.0, Jena 3.14.0, Jena 3.13.1, Jena 3.13.0, Jena 3.12.0, Jena
3.11.0, Jena 3.10.0, Jena 3.9.0, Jena 3.8.0
Reporter: Peter Winstanley
I came across this when trying out some code on jena 4.2 on the tarql project
[main] WARN org.apache.jena.arq.exec - URI
<[http://www.w3.org/2005/xpath-functions#day-from-dateTime]> has no registered
function factory
I looked at
[https://github.com/apache/jena/blob/main/jena-arq/src/main/java/org/apache/jena/sparql/function/StandardFunctions.java]
and realised that a few functions aren't what they are described as in
[https://www.w3.org/TR/xpath-functions-3/] . They appear to have a signature
that uses the plural, whereas the XPath functions are singular:
add(registry, xfn+"years-from-date", FN_YearsFromDate.class) ;
[https://www.w3.org/TR/xpath-functions-3/#func-year-from-date]
add(registry, xfn+"months-from-date", FN_MonthsFromDate.class) ;
[https://www.w3.org/TR/xpath-functions-3/#func-month-from-date]
add(registry, xfn+"days-from-date", FN_DaysFromDate.class) ;
[https://www.w3.org/TR/xpath-functions-3/#func-day-from-date]
add(registry, xfn+"years-from-dateTime", FN_YearsFromDateTime.class)
;
[https://www.w3.org/TR/xpath-functions-31/#func-year-from-dateTime]
add(registry, xfn+"months-from-dateTime",
FN_MonthsFromDateTime.class) ;
[https://www.w3.org/TR/xpath-functions-3/#func-month-from-dateTime]
add(registry, xfn+"days-from-dateTime", FN_DaysFromDateTime.class)
;
[https://www.w3.org/TR/xpath-functions-3/#func-day-from-dateTime]
When I used the incorrect XPath function signature "days-from-dateTime()" the
result was calculated as expected and there was no warning error message as
above.
When using the distribution of Tarql 1.2 (which, afaik, used Jena 3.11) I only
got the following error:
WARN URI <[http://www.w3.org/2005/xpath-functions#days-from-dateTime]> has no
registered function factory
and using "day-from-dateTime()" worked correctly. I looked into this by
opening the jar and found that the function was correct there:
;org/apache/jena/sparql/function/library/FN_YearFromDateTime
month-from-dateTime
<org/apache/jena/sparql/function/library/FN_MonthFromDateTime day-from-dateTime
:org/apache/jena/sparql/function/library/FN_DayFromDateTime
So, it looks like a long-standing error that has been corrected at some point
in the generation of the jars for the distro of Tarql 1.2
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
