Class Error

    • Constructor Detail

      • Error

        public Error()
    • Method Detail

      • getSpecialProperties

        public int getSpecialProperties​(Expression[] arguments)
        Description copied from class: SystemFunction
        Determine the special properties of this function. The general rule is that a system function call is non-creative unless more details are defined in a subclass.
        Overrides:
        getSpecialProperties in class SystemFunction
        Parameters:
        arguments - the actual arguments supplied in a call to the function
        Returns:
        the properties
      • isVacuousExpression

        public boolean isVacuousExpression()
        Determine whether this is a vacuous expression as defined in the XQuery update specification
        Returns:
        true if this expression is vacuous
      • call

        public Sequence call​(XPathContext context,
                             Sequence[] arguments)
                      throws XPathException
        Description copied from interface: Callable
        Call the Callable.
        Specified by:
        call in interface Callable
        Parameters:
        context - the dynamic evaluation context
        arguments - the values of the arguments, supplied as Sequences.

        Generally it is advisable, if calling iterate() to process a supplied sequence, to call it only once; if the value is required more than once, it should first be converted to a GroundedValue by calling the utility method SequenceTool.toGroundedValue().

        If the expected value is a single item, the item should be obtained by calling Sequence.head(): it cannot be assumed that the item will be passed as an instance of Item or AtomicValue.

        It is the caller's responsibility to perform any type conversions required to convert arguments to the type expected by the callee. An exception is where this Callable is explicitly an argument-converting wrapper around the original Callable.

        Returns:
        the result of the evaluation, in the form of a Sequence. It is the responsibility of the callee to ensure that the type of result conforms to the expected result type.
        Throws:
        XPathException - if a dynamic error occurs during the evaluation of the expression