Examples of lupos.datastructures.items.Item

lupos.datastructures.items.Item
Interface for items that can be part of triple patterns. @see {@link AnonymousLiteral}, {@link Literal}, {@link URILiteral}, {@link Variable}


@Namespace(value = "http://www.w3.org/2007/rif-builtin-predicate#")
public class NonStandardPredicates {
  @Builtin(Name = "is-literal")
  public static BooleanLiteral is_literal(Argument arg) {
    Item arg0 = arg.arguments.get(0);
    if(arg0 instanceof LazyLiteral){
      arg0 = ((LazyLiteral) arg0).getLiteral();
    }
    return BooleanLiteral.create(!(arg0 instanceof AnonymousLiteral || arg0 instanceof URILiteral));
  }

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    return BooleanLiteral.create(!(arg0 instanceof AnonymousLiteral || arg0 instanceof URILiteral));
  }


  @Builtin(Name = "is-blanknode")
  public static BooleanLiteral is_blanknode(Argument arg) {
    Item arg0 = arg.arguments.get(0);
    if(arg0 instanceof LazyLiteral){
      arg0 = ((LazyLiteral) arg0).getLiteral();
    }
    return BooleanLiteral.create(arg0 instanceof AnonymousLiteral);
  }

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    return BooleanLiteral.create(arg0 instanceof AnonymousLiteral);
  }


  @Builtin(Name = "is-uri")
  public static BooleanLiteral is_uri(Argument arg) {
    Item arg0 = arg.arguments.get(0);
    if(arg0 instanceof LazyLiteral){
      arg0 = ((LazyLiteral) arg0).getLiteral();
    }
    return BooleanLiteral.create(arg0 instanceof URILiteral);
  }

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  public Object visit(RuleVariable obj, Object arg) throws RIFException {
    return obj.getVariable();
  }


  protected TriplePattern unitermToTriplePattern(Uniterm obj) {
    Item subject = (Item) obj.termParams.get(0).accept(this, null);
    Item predicate = (Item) obj.termName.accept(this, null);
    Item object = (Item) obj.termParams.get(1).accept(this, null);
    TriplePattern pattern = new TriplePattern(subject, predicate, object);
    return pattern;
  }

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    } else {
      final URILiteral predName = (URILiteral) pred.termName.accept(this,
          null);
      final List<Item> predItems = new ArrayList<Item>();
      for (final IExpression expr : pred.termParams) {
        final Item item = (Item) expr.accept(this, null);
        predItems.add(item);
      }
      return new PredicatePattern(predName, predItems.toArray(new Item[] {}));
    }
  }

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      for (final Uniterm term : obj.getHead().getPredicates()) {
        if (!((RulePredicate) term).isTriple()) {
          final URILiteral name = (URILiteral) term.termName.accept(this, arg);
          final List<Item> params = new ArrayList<Item>();
          for (final IExpression expr : term.termParams) {
            final Item item = (Item) expr.accept(this, arg);
            params.add(item);
          }
          final Item[] paramsArray = params.toArray(new Item[] {});
          generate.addPattern(name, paramsArray);
          // Produzenten registrieren

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    if (!obj.isTriple()) {
      // PredicatePattern erstellen
      final URILiteral predName = (URILiteral) obj.termName.accept(this, arg);
      final List<Item> predItems = new ArrayList<Item>();
      for (final IExpression expr : obj.termParams) {
        final Item item = (Item) expr.accept(this, arg);
        predItems.add(item);
      }
      return new PredicatePattern(predName, predItems.toArray(new Item[] {}));
    }
    return this.unitermToTriplePattern(obj);

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  protected void insertMultipleURIOperator(Collection<MultipleURIOperator> ops, LinkedList<Tuple<Construct, Item>> graphConstraints, OperatorConnection connection){
    Iterator<MultipleURIOperator> it = ops.iterator();
    for(Tuple<Construct, Item> entry: graphConstraints){
      MultipleURIOperator muo = it.next();
      Collection<URILiteral> cu;
      Item item=entry.getSecond();
      if(item==null){
        cu = new LinkedList<URILiteral>();
      } else if(item.isVariable()){
        cu = this.indexScanCreator.getDataset().getNamedGraphs();
      } else {
        cu = new LinkedList<URILiteral>();
        cu.add((URILiteral)entry.getSecond());
      }

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  protected void insertMultipleURIOperator(Collection<MultipleURIOperator> ops, LinkedList<Tuple<Construct, Item>> graphConstraints, SimpleNode node){
    Iterator<MultipleURIOperator> it = ops.iterator();
    for(Tuple<Construct, Item> entry: graphConstraints){
      MultipleURIOperator muo = it.next();
      Collection<URILiteral> cu;
      Item item=entry.getSecond();
      if(item==null){
        cu = new LinkedList<URILiteral>();
      } else if(item.isVariable()){
        cu = this.indexScanCreator.getDataset().getNamedGraphs();
      } else {
        cu = new LinkedList<URILiteral>();
        cu.add((URILiteral)entry.getSecond());
      }

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  @Override
  public void visit(final ASTGraphConstraint node, OperatorConnection connection) {
    final int numberChildren = node.jjtGetNumChildren();


    Item graphConstraint = null;
    final Node child = node.jjtGetChild(0);


    if (child instanceof ASTQuotedURIRef) {
      try {
        graphConstraint = LiteralFactory.createURILiteral(((ASTQuotedURIRef) child).toQueryString());

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