The problem is that the endpoint is producing CSV in a slightly different format than ARQ is expecting
This is easier to see if you run the query in a browser with the output format set to text/csv - http://s.apache.org/AU2 With this we get the following output: "dt" "http://www.w3.org/2001/XMLSchema#string"; Note that the variable names given in the first row are fully enclosed in quotes which is perfectly valid CSV encoding but the code that parses CSV results isn't accounting for this and so is creating the variable name "dt" rather than dt in the parsed results. I've filed this as a bug and should have a fix shortly - https://issues.apache.org/jira/browse/JENA-695 In the meantime you can workaround this by using the broken variable names e.g. qs.get("\"dt\"); Ugly but does provide a workaround until a fix is available Thanks for reporting this, Rob On 14/05/2014 12:38, "Alejandro Rodríguez González" <[email protected]> wrote: >Hi! > >Sorry if this question has been already answered. Based on a previous >query >to this list ( http://goo.gl/kfKMqP ) now I have a small problem. > >I have the same query and the following code (see query and code here: >http://pastebin.com/16B6MPmz ). > >My problem is that, if I execute this query manually against the endpoint >(see: http://goo.gl/RVWuSi ) I can get correctly the desired result (a >datatype). However, doing this by code, I got the QuerySolution object >(which contains the variable name (dt) and the datatype (xml:string)), but >I can't get the datatype from the QuerySolution object. > >If I try calling getResource(variable) method, it returns null. If I do >the >same with the getLiteral(variable) or get(variable) to get a RDFNode, >always it returns a null value. Now, I'm getting the value parsing the >toString() value of the QuerySolution object, but I'm wondering if it is >an >easier way to do that, or maybe I'm not using the correct classes/methods. > >Thanks! > >-- >Dr. Alejandro Rodríguez González - PhD > >Bioinformatics at Centre for Plant Biotechnology and Genomics UPM-INIA >Polytechnic University of Madrid >http://www.alejandrorg.com >Phone: +34 914524900 . Ext: 25550 > > >*Once the game is over, the king and the pawn go back in the same box. - >Italian proverb*
