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Subject: RE: ERROR IN SPARQL Query
Date: Thu, 19 Jan 2012 11:08:35 +0530
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Hi,
 Check out SPARQL query syntax http://www.w3.org/TR/rdf-sparql-query/

 
-----Original Message-----
From: Nallanchakravarthy Ramadurai Ananthanarayanan
[mailto:drnrananthanarayanen@gmail.com] 
Sent: 19 January 2012 10:37
To: jena-dev@incubator.apache.org
Subject: ERROR IN SPARQL Query

package QueryBuilder;
import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import com.hp.hpl.jena.query.Query;
 import com.hp.hpl.jena.query.QueryExecution;
 import com.hp.hpl.jena.query.QueryExecutionFactory;
 import com.hp.hpl.jena.query.QueryFactory;
 import com.hp.hpl.jena.query.ResultSet;
 import com.hp.hpl.jena.query.ResultSetFormatter;
 import com.hp.hpl.jena.rdf.model.Model;
 import com.hp.hpl.jena.rdf.model.ModelFactory;


 public class Query4 {
 public static void main(String[] args) throws IOException {
 InputStream in = new FileInputStream(new File("d:/PROJECT/vc-db-1.rdf"));
 // Create an empty in-memory model and populate it from the graph
 Model model = ModelFactory.createMemModelMaker().createDefaultModel();
 model.read(in,null); // null base URI, since model URIs are absolute
 in.close();
 // Create a new query
 String queryString= "{<http://www.w3.org/2001/vcard-rdf/3.0#> SELECT ?g
WHERE  { ?y Given ?g . FILTER regex(?g, 'r', 'i')}}";
 Query query = QueryFactory.create(queryString);
 // Execute the query and obtain results
 QueryExecution qe = QueryExecutionFactory.create(query, model);
 ResultSet results = qe.execSelect();
 // Output query results
 ResultSetFormatter.out(System.out, results, query);

 // Important - free up resources used running the query
 qe.close();

 }
 }

Error
-------
Exception in thread "main" com.hp.hpl.jena.query.QueryParseException:
Encountered " "{" "{ "" at line 1, column 1.
Was expecting one of:
    "base" ...
    "prefix" ...
    "select" ...
    "describe" ...
    "construct" ...
    "ask" ...

    at
com.hp.hpl.jena.sparql.lang.ParserSPARQL11.perform(ParserSPARQL11.java:87)
    at
com.hp.hpl.jena.sparql.lang.ParserSPARQL11.parse(ParserSPARQL11.java:40)
    at com.hp.hpl.jena.query.QueryFactory.parse(QueryFactory.java:132)
    at com.hp.hpl.jena.query.QueryFactory.create(QueryFactory.java:69)
    at com.hp.hpl.jena.query.QueryFactory.create(QueryFactory.java:40)
    at com.hp.hpl.jena.query.QueryFactory.create(QueryFactory.java:28)
    at QueryBuilder.Query4.main(Query4.java:25)