On 14/11/13 16:42, Martynas Jusevičius wrote:
OK I was probably too quick - now I realized the syntax of xsd:gMonth
and xsd:gDay is not so simple...
:-)
http://www.w3.org/TR/xmlschema11-2/#dateTime for details.
The range of time:month is a non-negative integer so may be single
digit. That'll need normalizing and checking to use xsd: where it must
be two digits. Ditto time:day. And maybe people write years as two digits.
gMonth and gDay have "missing parts" indicators "--" and "---"
but I don't see any g* here.
Andy
On Thu, Nov 14, 2013 at 4:05 PM, Martynas Jusevičius
<[email protected]> wrote:
I came up with an approach that concatenates lexical values and
doesn't need Calendar or DateTimeStruct.
Not sure however how this aligns with the range of time:inXSDDateTime
which is xsd:dateTime - can xsd:gYear/xsd:gMonthDay/xsd:date be
treated as xsd:dateTime values? I guess I'll have to typecast them in
SPARQL.
if
(resource.hasProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#inDateTime";)))
{
Literal dateTime;
Resource dateTimeDesc =
resource.getPropertyResourceValue(ResourceFactory.createProperty("http://www.w3.org/2006/time#inDateTime";));
if
(!dateTimeDesc.hasProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#year";)))
throw new DateTimeParseException("time:year value is missing");
RDFNode yearObject =
dateTimeDesc.getProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#year";)).getObject();
if (!yearObject.isLiteral())
throw new DateTimeParseException("time:year value is
not a Literal");
if
(dateTimeDesc.hasProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#month";)))
{
RDFNode monthObject =
dateTimeDesc.getProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#month";)).getObject();
if (!monthObject.isLiteral())
throw new DateTimeParseException("time:month value
is not a Literal");
if
(dateTimeDesc.hasProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#day";)))
{
RDFNode dayObject =
dateTimeDesc.getProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#day";)).getObject();
if (!dayObject.isLiteral())
throw new DateTimeParseException("time:day
value is not a Literal");
dateTime =
resource.getModel().createTypedLiteral(yearObject.asLiteral().getLexicalForm()
+ "-" +
monthObject.asLiteral().getLexicalForm() + "-"
+
dayObject.asLiteral().getLexicalForm(),
XSDDatatype.XSDdate);
}
else
{
dateTime =
resource.getModel().createTypedLiteral(yearObject.asLiteral().getLexicalForm()
+ "-" +
monthObject.asLiteral().getLexicalForm(),
XSDDatatype.XSDgMonthDay);
}
}
else
dateTime = yearObject.asLiteral();
resource.addLiteral(ResourceFactory.createProperty("http://www.w3.org/2006/time#inXSDDateTime";),
dateTime);
}
On Thu, Nov 14, 2013 at 3:08 PM, Martynas Jusevičius
<[email protected]> wrote:
I'll try DateTimeStruct again, but that basically means I need my own
copy of the class, since I currently cannot extend it to override the
private constructor?
On Thu, Nov 14, 2013 at 2:15 PM, Andy Seaborne <[email protected]> wrote:
Hi there,
DateTimeStruct is, well, a struct. The fields are public. You could write a
builder to target that. The default constructor could be made public. The
statics are specific patterns for the XSD date/time datatypes with
validation.
DateTimeStruct represents the Date/time Seven-property model of XSD. It can
produce the string for xsd:date or xsd:dateTime but not the gregorial g*
datatypes.
java.util.calendar is OK as a value but, in the details, unusable for XSD
types. Why not set DateTimeStruct fields?
javax.xml.datatype.XMLGregorianCalendar could be of use - it has getters and
setters.
For DateTimeStruct or XMLGregorianCalendar, you can then use
createTypedLiteral(String lex, RDFDatatype dtype)
Not all mandatory - the
format can be YYYY, YYYY-MM, YYYY-MM-DD.
You could build the lexical form.
Andy
On 14/11/13 02:02, Martynas Jusevičius wrote:
Hey,
I have datetime components as 3 separate literals, with xsd:gYear,
xsd:gMonth, xsd:gDay respective datatypes. Not all mandatory - the
format can be YYYY, YYYY-MM, YYYY-MM-DD.
Now how do I combine those into a single xsd:dateTime Literal? A
concrete use case would be converting time:inDateTime values into
time:inXSDDateTime values:
http://www.w3.org/TR/owl-time/#calclock
I came up with the code below which seems to work but is not pretty
(and doesn't deal with time). I also looked at DateTimeStruct but
either way there seemed to be some datatype mismatch. I think it would
make more sense for DateTimeStruct to use the builder pattern instead
of static methods.
Is there a better way?
if
(resource.hasProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#inDateTime";)))
{
Calendar calendar = Calendar.getInstance();
Resource dateTimeDesc =
resource.getPropertyResourceValue(ResourceFactory.createProperty("http://www.w3.org/2006/time#inDateTime";));
if
(dateTimeDesc.hasProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#year";)))
{
RDFNode object =
dateTimeDesc.getProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#year";)).getObject();
if (object.isLiteral())
{
Literal literal = object.asLiteral();
calendar.set(Calendar.YEAR,
Integer.parseInt(literal.getLexicalForm()));
}
}
else throw new DateTimeParseException("time:year value is
missing");
if
(dateTimeDesc.hasProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#month";)))
{
RDFNode object =
dateTimeDesc.getProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#month";)).getObject();
if (object.isLiteral())
{
Literal literal = object.asLiteral();
calendar.set(Calendar.MONTH,
Integer.parseInt(literal.getLexicalForm()));
}
}
if
(dateTimeDesc.hasProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#day";)))
{
RDFNode object =
dateTimeDesc.getProperty(ResourceFactory.createProperty("http://www.w3.org/2006/time#day";)).getObject();
if (object.isLiteral())
{
Literal literal = object.asLiteral();
calendar.set(Calendar.DAY_OF_MONTH,
Integer.parseInt(literal.getLexicalForm()));
}
}
calendar.set(Calendar.HOUR, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
Literal dateTime =
resource.getModel().createTypedLiteral(calendar);
resource.addLiteral(ResourceFactory.createProperty("http://www.w3.org/2006/time#inXSDDateTime";),
dateTime);
}
Martynas
graphityhq.com
