- Functional Interface:
- This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface LambdaCallableA generic interface for calling expressions by supplying the values of their subexpressions
Sequence call(XPathContext context, Sequence arguments) throws XPathExceptionCall 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
GroundedValueby calling the utility method SequenceTool.toGroundedValue().
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