public interface Callable
| Modifier and Type | Method and Description |
|---|---|
Sequence<?> |
call(XPathContext context,
Sequence<?>[] arguments)
Call the Callable.
|
Sequence<?> call(XPathContext context, Sequence<?>[] arguments) throws XPathException
context - the dynamic evaluation contextarguments - 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.
XPathException - if a dynamic error occurs during the evaluation of the expressionCopyright (c) 2004-2020 Saxonica Limited. All rights reserved.