Package lupos.rif.model

Examples of lupos.rif.model.RuleList

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  public Object visit(final RIFImport n, final IRuleNode argu) {
    throw new RIFException("IMPORT not supported!");
  }

  public Object visit(final RIFList n, final IRuleNode argu) {
    final RuleList result = new RuleList();
    result.setParent(argu);
    if (n.f2.which == 1) {
      List<INode> nodes = (List<INode>) n.f2.choice.accept(this, result);
      List<INode> terms = (List<INode>) nodes.get(0).accept(this, result);
      for (INode term : terms)
        result.addItem((IExpression) term.accept(this, result));
      // Tail anh�ngen
      if (((NodeOptional) nodes.get(1)).present()) {
        result.isOpen = true;
        result.addItem((IExpression) ((List<INode>) nodes.get(1)
            .accept(this, result)).get(1).accept(this, result));
      }
    }
    return result;
  }
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@Namespace(value = "http://www.w3.org/2007/rif-builtin-function#")
public class ListFunctions {

  @Builtin(Name = "make-list")
  public static RuleList make_list(final Argument arg) {
    final RuleList result = new RuleList();
    for (final Item item : arg.arguments) {
      if (item instanceof Variable)
        result.addItem(new RuleVariable(item.getName()));
      else if (item instanceof Literal)
        result.addItem(new Constant((Literal) item, result));
      else if (item instanceof IExpression)
        result.addItem((IExpression) item);
    }
    return result;
  }
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      result.termParams.add((IExpression) expr.accept(this, result));
    return result;
  }

  public IRuleNode visit(RuleList obj, IRuleNode arg) throws RIFException {
    final RuleList result = new RuleList();
    result.setParent(arg);
    result.isOpen = obj.isOpen;
    List<IExpression> exprs = new ArrayList<IExpression>(obj.getItems());
    for (IExpression expr : exprs)
      result.getItems().add((IExpression) expr.accept(this, result));
    return result;
  }
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  @Builtin(Name = "get")
  public static Item get(final Argument arg) {
    if (arg.arguments.size() == 2
        && arg.arguments.get(0) instanceof RuleList
        && arg.arguments.get(1) instanceof TypedLiteral) {
      final RuleList list = (RuleList) arg.arguments.get(0);
      int index = BuiltinHelper.getInteger((TypedLiteral) arg.arguments
          .get(1));
      if (index < 0)
        index += list.getItems().size();
      if (index < 0 || index >= list.getItems().size())
        return null;
      else {
        final IExpression expr = list.getItems().get(index);
        return (Item) expr.evaluate(arg.binding);
      }
    } else
      return null;
  }
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  @Builtin(Name = "sublist")
  public static RuleList sublist(final Argument arg) {
    if (arg.arguments.size() > 1 && arg.arguments.size() < 4
        && arg.arguments.get(0) instanceof RuleList
        && arg.arguments.get(1) instanceof TypedLiteral) {
      final RuleList list = (RuleList) arg.arguments.get(0);
      final int start = BuiltinHelper
          .getInteger((TypedLiteral) arg.arguments.get(1));
      int stop = list.getItems().size() - 1;
      if (arg.arguments.size() == 3
          && arg.arguments.get(2) instanceof TypedLiteral)
        stop = BuiltinHelper.getInteger((TypedLiteral) arg.arguments
            .get(2));
      List<IExpression> subList = list.getItems().subList(start, stop);
      final RuleList result = new RuleList();
      result.getItems().addAll(subList);
      return result;
    }
    return null;
  }
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  @Builtin(Name = "append")
  public static RuleList append(final Argument arg) {
    if (arg.arguments.size() > 1
        && arg.arguments.get(0) instanceof RuleList) {
      final RuleList list = (RuleList) arg.arguments.get(0);
      boolean first = true;
      for (final Item item : arg.arguments) {
        if (first) {
          first = false;
          continue;
        }
        if (item instanceof Variable)
          list.addItem(new RuleVariable(item.getName()));
        else if (item instanceof Literal)
          list.addItem(new Constant((Literal) item, list));
        else if (item instanceof IExpression)
          list.addItem((IExpression) item);
      }
      return list;
    }
    return null;
  }
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  @Builtin(Name = "concatenate")
  public static RuleList concatenate(final Argument arg) {
    if (arg.arguments.size() > 0
        && arg.arguments.get(0) instanceof RuleList) {
      final RuleList list = (RuleList) arg.arguments.get(0);
      boolean first = true;
      for (final Item item : arg.arguments) {
        if (first) {
          first = false;
          continue;
        }
        list.getItems().addAll(((RuleList) item).getItems());
      }
      return list;
    }
    return null;
  }
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  public static RuleList insert_before(final Argument arg) {
    if (arg.arguments.size() == 3
        && arg.arguments.get(0) instanceof RuleList
        && arg.arguments.get(1) instanceof TypedLiteral
        && arg.arguments.get(2) instanceof Item) {
      final RuleList list = (RuleList) arg.arguments.get(0);
      int index = BuiltinHelper.getInteger((TypedLiteral) arg.arguments
          .get(1));
      final Item item = arg.arguments.get(2);
      if (index < 0)
        index += list.getItems().size();
      if (index < 0 || index >= list.getItems().size())
        return null;
      List<IExpression> original = new ArrayList<IExpression>(
          list.getItems());
      list.getItems().clear();
      for (int i = 0; i < original.size(); i++) {
        final IExpression expr = original.get(i);
        if (i == index) {
          if (item instanceof Variable)
            list.addItem(new RuleVariable(item.getName()));
          else if (item instanceof Literal)
            list.addItem(new Constant((Literal) item, list));
          else if (item instanceof IExpression)
            list.addItem((IExpression) item);
        }
        list.addItem(expr);
      }
      return list;
    }
    return null;
  }
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  @Builtin(Name = "remove")
  public static RuleList remove(final Argument arg) {
    if (arg.arguments.size() == 2
        && arg.arguments.get(0) instanceof RuleList
        && arg.arguments.get(1) instanceof TypedLiteral) {
      final RuleList list = (RuleList) arg.arguments.get(0);
      int index = BuiltinHelper.getInteger((TypedLiteral) arg.arguments
          .get(1));
      if (index < 0)
        index += list.getItems().size();
      if (index < 0 || index >= list.getItems().size())
        return null;
      else {
        list.getItems().remove(index);
        return list;
      }
    } else
      return null;
  }
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  @Builtin(Name = "reverse")
  public static RuleList reverse(final Argument arg) {
    if (arg.arguments.size() == 1
        && arg.arguments.get(0) instanceof RuleList) {
      final RuleList list = (RuleList) arg.arguments.get(0);
      List<IExpression> reversed = new ArrayList<IExpression>(
          Lists.reverse(list.getItems()));
      list.getItems().clear();
      list.getItems().addAll(reversed);
      return list;
    } else
      return null;
  }
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Related Classes of lupos.rif.model.RuleList

  • lupos.rif.builtin.ListFunctions
  • lupos.rif.builtin.ListPredicates
  • lupos.rif.visitor.ParseSyntaxTreeVisitor
  • lupos.rif.visitor.ReplaceVarsVisitor
  • lupos.rif.RIFException
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