Examples of org.openrdf.query.algebra.Bound

org.openrdf.query.algebra.Bound
3.org/TR/rdf-sparql-query/#func-bound">SPARQL Query Language for RDF; checks if a variable is bound. @author Arjohn Kampman @author James Leigh

       * 
       * And(Not(Bound(?acl_attr1)), Not(Bound(?acl_attr_1), ...)
       */
      And and = new And();
      for (Var attributeVar : attributeVars) {
        and.addArg(new Not(new Bound(attributeVar)));
      }


      if (and.getArgs().size() == 1) {
        filterConditions.addArg(and.getArg(0));
      }

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  @Override
  public Bound visit(ASTBound node, Object data)
    throws VisitorException
  {
    return new Bound((Var)super.visit(node, data));
  }

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  @Override
  public ValueExpr visit(ASTBound node, Object data)
    throws VisitorException
  {
    Var var = (Var)node.getArg().jjtAccept(this, null);
    return new Bound(var);
  }

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      // No need to keep the comparison, but we do need to make sure
      // that the variable is not null in case it comes from an
      // optional statement pattern. Replace the SameTerm constraint with a
      // Bound constraint.
      filter.setCondition(new Bound(var));


      // Check if the variable is used in a pattern outside of a left join.
      // If so, removed this filter condition
      filter.visit(new BoundOptimizer());
    }

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    private List<Var> vars = new ArrayList<Var>();


    @Override
    public void meet(Filter filter) {
      if (filter.getCondition() instanceof Bound) {
        Bound bound = (Bound)filter.getCondition();
        vars.add(bound.getArg());
        innerJoins.add(Boolean.FALSE);
        filter.getArg().visit(this);
        vars.remove(vars.size() - 1);
        if (innerJoins.remove(innerJoins.size() - 1)) {
          filter.replaceWith(filter.getArg());

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  @Override
  public Bound visit(ASTBound node, Object data)
    throws VisitorException
  {
    return new Bound((Var)super.visit(node, data));
  }

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      // No need to keep the comparison, but we do need to make sure
      // that the variable is not null in case it comes from an
      // optional statement pattern. Replace the SameTerm constraint with a
      // Bound constraint.
      filter.setCondition(new Bound(var));
    }

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  @Override
  public ValueExpr visit(ASTBound node, Object data)
    throws VisitorException
  {
    Var var = (Var)node.getArg().jjtAccept(this, null);
    return new Bound(var);
  }

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Related Classes of org.openrdf.query.algebra.Bound

org.openrdf.query.algebra.evaluation.impl.SameTermFilterOptimizer$BoundOptimizer

org.openrdf.query.algebra.evaluation.impl.SameTermFilterOptimizer$SameTermFilterVisitor

org.openrdf.query.parser.serql.QueryModelBuilder

org.openrdf.query.parser.sparql.TupleExprBuilder

org.openrdf.sail.accesscontrol.AccessControlConnection$AccessControlQueryExpander

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