Examples of com.hp.hpl.jena.query.Query

com.hp.hpl.jena.query.Query
The data structure for a query as presented externally. There are two ways of creating a query - use the parser to turn a string description of the query into the executable form, and the programmatic way (the parser is calling the programmatic operations driven by the quyery string). The declarative approach of passing in a string is preferred. Once a query is built, it can be passed to the QueryFactory to produce a query execution engine. @see QueryExecutionFactory @see ResultSet

    
    // Helper.  Prints the test result (check it!)
    private static void test(String qs)
    {
        qs = "SELECT * {\n"+qs+"\n}" ;
        Query query = QueryFactory.create(qs, Syntax.syntaxARQ) ;
        AlgebraGenerator gen = new AlgebraGenerator() ;
        Op opActual = gen.compile(query) ;
        String x = opActual.toString() ;
        x = x.replaceAll("\n$", "") ;
        x = x.replace("\n", "\", \n\"") ;

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    private static void test(String qs, String... y)
    {
        qs = "SELECT * {\n"+qs+"\n}" ;
        Query query = QueryFactory.create(qs, Syntax.syntaxARQ) ;


        String opStr = StrUtils.strjoinNL(y) ;
        Op opExpected = SSE.parseOp(opStr) ;
        AlgebraGenerator gen = new AlgebraGenerator() ;
        Op opActual = gen.compile(query) ;

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public class TestVarScope extends BaseTest
{
    private static void scope(String queryStr)
    {
        Query query = QueryFactory.create(queryStr) ;
    }

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                } ;
                output(outStream, c, lineNumbers) ;
            }
            
            // Attempt to parse it.
            Query query = null ;
            try {
                query = QueryFactory.create(queryString, "http://example/base/", language) ;
            } catch (ARQException ex)
            {
                // Over generous exception (should be QueryException)

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  @Override
  public QueryResultTable sparqlSelect(String queryString) throws ModelRuntimeException {
    assertModel();
    log.debug("Query " + queryString);
    Query query = QueryFactory.create(queryString);
    return new QueryResultTableImpl(query, this.jenaModel);
  }

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  @Override
  public ClosableIterable<Statement> sparqlConstruct(String queryString)
          throws ModelRuntimeException {
    assertModel();
    Query query = QueryFactory.create(queryString);
    QueryExecution qexec = QueryExecutionFactory.create(query, this.jenaModel);
    
    if(query.isConstructType()) {
      com.hp.hpl.jena.rdf.model.Model m = qexec.execConstruct();
      Model resultModel = new ModelImplJena(null, m, Reasoning.none);
      resultModel.open();
      return resultModel;
    } else {

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  @Override
  public boolean sparqlAsk(String queryString) throws ModelRuntimeException {
    assertModel();
    log.debug("Query " + queryString);
    Query query = QueryFactory.create(queryString);
    
    if(!query.isAskType()) {
      throw new ModelRuntimeException("The given query is not an ASK query");
    }
    // else
    QueryExecution qexec = QueryExecutionFactory.create(query, this.jenaModel);
    return qexec.execAsk();

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   */
  @Override
  public ClosableIterable<Statement> sparqlDescribe(String queryString)
          throws ModelRuntimeException {
    assertModel();
    Query query = QueryFactory.create(queryString);
    QueryExecution qexec = QueryExecutionFactory.create(query, this.jenaModel);
    
    if(query.isDescribeType()) {
      com.hp.hpl.jena.rdf.model.Model m = qexec.execDescribe();
      Model resultModel = new ModelImplJena(null, m, Reasoning.none);
      resultModel.open();
      return resultModel;
    } else {

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    com.hp.hpl.jena.query.Syntax syntax = com.hp.hpl.jena.query.Syntax.lookup(querylanguage);
    if(syntax == null) {
      // delegate to super
      return super.querySelect(queryString, querylanguage);
    }
    Query query = QueryFactory.create(queryString, syntax);
    return new QueryResultTableImpl(query, this.jenaModel);
  }

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    com.hp.hpl.jena.query.Syntax syntax = com.hp.hpl.jena.query.Syntax.lookup(querylanguage);
    if(syntax == null) {
      // delegate to super
      return super.queryConstruct(queryString, querylanguage);
    }
    Query query = QueryFactory.create(queryString, syntax);
    
    QueryExecution qexec = QueryExecutionFactory.create(query, this.jenaModel);
    
    if(query.isConstructType()) {
      com.hp.hpl.jena.rdf.model.Model m = qexec.execConstruct();
      Model resultModel = new ModelImplJena(null, m, Reasoning.none);
      resultModel.open();
      return resultModel;
    } else {

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