/**
* is_blanknode.
*
* @param arg a {@link lupos.rif.builtin.Argument} object.
* @return a {@link lupos.rif.builtin.BooleanLiteral} object.
*/
@Builtin(Name = "is-blanknode")
public static BooleanLiteral is_blanknode(final Argument arg) {
Item arg0 = arg.arguments.get(0);
if (arg0 instanceof LazyLiteral) {
arg0 = ((LazyLiteral) arg0).getLiteral();
}
return BooleanLiteral.create(arg0 instanceof AnonymousLiteral);
}
/**
* is_uri.
*
* @param arg a {@link lupos.rif.builtin.Argument} object.
* @return a {@link lupos.rif.builtin.BooleanLiteral} object.
*/
@Builtin(Name = "is-uri")
public static BooleanLiteral is_uri(final Argument arg) {
Item arg0 = arg.arguments.get(0);
if (arg0 instanceof LazyLiteral) {
arg0 = ((LazyLiteral) arg0).getLiteral();
}
return BooleanLiteral.create(arg0 instanceof URILiteral);
}
/**
* is_literal.
*
* @param arg a {@link lupos.rif.builtin.Argument} object.
* @return a {@link lupos.rif.builtin.BooleanLiteral} object.
*/
@Builtin(Name = "is-literal")
public static BooleanLiteral is_literal(final 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));
}
/**
* is_integer_expression.
*
* @param arg a {@link lupos.rif.builtin.Argument} object.
* @return a {@link lupos.rif.builtin.BooleanLiteral} object.
*/
@Builtin(Name = "is-integer-expression")
public static BooleanLiteral is_integer_expression(final Argument arg) {
Item arg0 = arg.arguments.get(0);
if (arg0 instanceof LazyLiteral) {
arg0 = ((LazyLiteral) arg0).getLiteral();
}
final double value = BuiltinHelper.numberFromLiteral((TypedLiteral) arg0);
return BooleanLiteral.create(Math.round(value) == value);
}