Hi,
I created an abstraction for this awhile ago - essentially there is an
interface 'SparqlStmt' with implementations that wrap an UpdateRequest or a
Query. Correspondingly, there is a SparqlStmtParser interface whose
implementation is makes use of a SparqlQueryParser and SparqlUpdateParser.
If the statement cannot be parsed, it attempts to to get the location of the
parse error (line / col) and decide on the statement type on this basis.
Its on maven central - but I see its not there for jena 3.14.0 but I could do
it today.
https://search.maven.org/artifact/org.aksw.jena-sparql-api/jena-sparql-api-stmt/3.13.1-1/jar
I would also gladly contribute it to jena directly :)
Cheers,
Claus
https://github.com/SmartDataAnalytics/jena-sparql-api/blob/fa5fe33b0e7ac80586cdb3522aa5e0d75718db26/jena-sparql-api-stmt/src/main/java/org/aksw/jena_sparql_api/stmt/SparqlStmtParserImpl.java#L57
On 18.03.20 12:58, Marco Neumann wrote:
is there some utility function here in the code base now already to do
this, or do I still need to roll my own here?
On Tue, Jul 30, 2013 at 4:25 PM Andy Seaborne <a...@apache.org> wrote:
On 30/07/13 10:13, Arthur Vaïsse-Lesteven wrote:
Hi,
I would like to know if Jena offers a way to detect the type of an
unknow SPARQL request ?Starting from the query string.
At the moment the only way I succed to code it without "basic parsing"
of the query ( sort of thing I prefer avoid, manually parsing string with
short function often create errors )
looks like this :
[...]
String queryString = "a query string, may be a select or an
update";
try{
Query select = QueryFactory.create(queryString);
Service.process_select_query(select);//do some work with
the select
}
catch(QueryException e){
UpdateRequest update = UpdateFactory.create(queryString);
Service.process_update_query(update);//do some work with
the update
}
catch(ProcessException e){
//handle this exception
}
[...]
So is it possible ? Or not ?
Not currently.
You could use a regexp to spot the SELECT/CONSTRUCT/DESCRIBE/ASK keyword
coming after BASE/PREFIXES/Comments.
Andy
--
Dipl. Inf. Claus Stadler
Department of Computer Science, University of Leipzig
Research Group: http://aksw.org/
Workpage & WebID: http://aksw.org/ClausStadler
Phone: +49 341 97-32260
