net.sf.saxon.expr
Interface ItemMappingFunction

All Known Implementing Classes:

NumberFn

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.

Method Summary

Item	map(Item item) Map one item to another item.

Method Detail

map

Item map(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