- 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 MappingFunctionMappingFunction is an interface that must be satisfied by an object passed to a MappingIterator. It represents an object which, given an Item, can return a SequenceIterator that delivers a sequence of zero or more Items.
It maps an item of class F to a sequence of items of class T, returned as an iterator.
NOTE: Java allows a lambda expression to be used where an ItemMappingFunction is needed, but C# does not (it's not possible in C# to have a class implementing a delegate). So if a delegate is wanted, use
SequenceIterator map(Item item) throws XPathExceptionMap one item to a sequence.
item- The item to be mapped.
- one of the following: (a) a SequenceIterator over the sequence of items that the supplied input item maps to, or (b) null if it maps to an empty sequence.
XPathException- if a dynamic error occurs