code: package utils;
  
  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.Syntax;
  
  public class queryExecutor {
  	/*
  	 * This class executes the sparql query given a sparql in string
  	 * The return type of the functions are different 
  	 * TODO: make them one function without breaking a lot of code.
  	 * 
  	 * */
  	public static ResultSet query(String sparql){
  		Query query = QueryFactory.create(sparql,Syntax.syntaxARQ);
  //		QueryExecution qExe = QueryExecutionFactory.sparqlService( "http://131.220.153.66:8900/sparql", query );
  		QueryExecution qExe = QueryExecutionFactory.sparqlService( "http://live.dbpedia.org/sparql", query );
  		ResultSet results = qExe.execSelect();
  		return results;
  	}
  	
  	public static boolean queryAsk(String sparql) {
  		Query query = QueryFactory.create(sparql,Syntax.syntaxARQ) ;
  //		QueryExecution qexec = QueryExecutionFactory.sparqlService("http://131.220.153.66:8900/sparql",query) ;
  		QueryExecution qexec = QueryExecutionFactory.sparqlService( "http://live.dbpedia.org/sparql", query );
  		boolean result = qexec.execAsk() ;
  		qexec.close();
  		return result;
  	}
  
  }