Note that parsing the string as a query aborts early as soon as it finds
an update keyword so the cost of parsing isn't very large.
Andy
On 18/03/2020 11:58, 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 <[email protected]> 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
