Package org.openrdf.query

Examples of org.openrdf.query.BooleanQuery.ask()

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    queryBuilder.append("{ ?p foaf:name ?name }");

    BooleanQuery query = testCon.prepareBooleanQuery(QueryLanguage.SPARQL, queryBuilder.toString());
    query.setBinding("name", nameBob);

    assertTrue(query.ask());
  }

  public void testDataset()
    throws Exception
  {
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    queryBuilder.append("{ ?p foaf:name ?name }");

    BooleanQuery query = testCon.prepareBooleanQuery(QueryLanguage.SPARQL, queryBuilder.toString());
    query.setBinding("name", nameBob);

    assertTrue(query.ask());

    DatasetImpl dataset = new DatasetImpl();

    // default graph: {context1}
    dataset.addDefaultGraph(context1);
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    DatasetImpl dataset = new DatasetImpl();

    // default graph: {context1}
    dataset.addDefaultGraph(context1);
    query.setDataset(dataset);
    assertTrue(query.ask());

    // default graph: {context1, context2}
    dataset.addDefaultGraph(context2);
    query.setDataset(dataset);
    assertTrue(query.ask());
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    assertTrue(query.ask());

    // default graph: {context1, context2}
    dataset.addDefaultGraph(context2);
    query.setDataset(dataset);
    assertTrue(query.ask());

    // default graph: {context2}
    dataset.removeDefaultGraph(context1);
    query.setDataset(dataset);
    assertFalse(query.ask());
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    assertTrue(query.ask());

    // default graph: {context2}
    dataset.removeDefaultGraph(context1);
    query.setDataset(dataset);
    assertFalse(query.ask());

    queryBuilder.setLength(0);
    queryBuilder.append("PREFIX foaf: <" + FOAF_NS + "> ");
    queryBuilder.append("ASK ");
    queryBuilder.append("{ GRAPH ?g { ?p foaf:name ?name } }");
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    query = testCon.prepareBooleanQuery(QueryLanguage.SPARQL, queryBuilder.toString());
    query.setBinding("name", nameBob);

    // default graph: {context2}; named graph: {}
    query.setDataset(dataset);
    assertFalse(query.ask());

    // default graph: {context1, context2}; named graph: {context2}
    dataset.addDefaultGraph(context1);
    dataset.addNamedGraph(context2);
    query.setDataset(dataset);
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    // default graph: {context1, context2}; named graph: {context2}
    dataset.addDefaultGraph(context1);
    dataset.addNamedGraph(context2);
    query.setDataset(dataset);
    assertFalse(query.ask());

    // default graph: {context1, context2}; named graph: {context1, context2}
    dataset.addNamedGraph(context1);
    query.setDataset(dataset);
    assertTrue(query.ask());
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    assertFalse(query.ask());

    // default graph: {context1, context2}; named graph: {context1, context2}
    dataset.addNamedGraph(context1);
    query.setDataset(dataset);
    assertTrue(query.ask());
  }

  public void testGetStatements()
    throws Exception
  {
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    }
  }

  private static boolean doBooleanQuery(RepositoryConnection con, String query) throws RepositoryException, MalformedQueryException, QueryEvaluationException {
    BooleanQuery resultsTable = con.prepareBooleanQuery(QueryLanguage.SPARQL, query);
    return resultsTable.ask();
  } 
 
  private static Value[][] doTupleQuery(RepositoryConnection con, String query) throws RepositoryException, MalformedQueryException, QueryEvaluationException {
    TupleQuery resultsTable = con.prepareTupleQuery(QueryLanguage.SPARQL, query);
    TupleQueryResult bindings = resultsTable.evaluate();
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