net.sf.saxon.expr

Interface ItemMappingFunction

All Known Implementing Classes:

AtomicSequenceConverter.AtomicSequenceMappingFunction, AtomicSequenceConverter.ToStringMappingFunction, EmptyTextNodeRemover, ForExpression.MappingAction, FunctionSequenceCoercer.Coercer, IntegratedFunctionCall.ConfigurationCheckingFunction, ItemFilter, ItemMapper, ItemTypeCheckingFunction, WherePopulated

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 ItemMappingFunction

ItemMappingFunction is an interface that must be satisfied by an object passed to a ItemMappingIterator. It represents an object which, given an Item, can return either another Item, or null.

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 ItemMapper, to ensure that it works in both languages.

Method Summary

Modifier and Type	Method and Description
Item	mapItem(Item item) Map one item to another item.

Method Detail

mapItem

Item mapItem(Item item)
      throws XPathException

Map one item to another item.

Parameters:

item - The input item to be mapped.

Returns:

either the output item, or null.

Throws:

XPathException - if a dynamic error occurs