Class VendorFunctionSetHE.HasLocalNamespaces

  • All Implemented Interfaces:
    Callable, FunctionItem, GroundedValue, Item, Sequence
    Enclosing class:

    public static class VendorFunctionSetHE.HasLocalNamespaces
    extends SystemFunction
    Implement saxon:has-local-namespaces. The function takes an element node as input and returns true if (a) the element is parentless, or (b) the parent is a document node, or (c) the element has namespace declarations or undeclarations that differ from those of the parent element (that is, if its in-scope namespace bindings are different from those of the parent element).

    This function is provided for use by the XSLT-compiler-in-XSLT, so that it can decide efficiently whether to generate an "ns" element containing namespace bindings in the SEF file.

    • Constructor Detail

      • HasLocalNamespaces

        public HasLocalNamespaces()
    • Method Detail

      • call

        public BooleanValue call​(XPathContext context,
                                 Sequence[] arguments)
                          throws XPathException
        Description copied from interface: Callable
        Call the Callable.
        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.

        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.
        XPathException - if a dynamic error occurs during the evaluation of the expression